Understanding Weld Stainless Steel: The Versatile and Durable Metal Stainless steel is a widely used metal known for its exceptional properties and versatility. In this article, I will provide you with a comprehensive understanding of stainless steel, its characteristics, and its various applications based on my personal experience working with this remarkable material. What is Stainless Steel? Stainless steel is an alloy of iron, chromium, and other elements, such as nickel and molybdenum. The addition of chromium gives stainless steel its corrosion-resistant properties, making it highly resistant to rust and staining. It is important to note that stainless steel comes in different grades, each with its own unique composition and properties. Key Characteristics of Stainless Steel Corrosion Resistance: Stainless steel's primary advantage is its excellent resistance to corrosion. This makes it a popular choice for applications where exposure to moisture or harsh environments is common, such as in the construction of bridges, marine equipment, and kitchen appliances. Durability: Stainless steel is a highly durable material that can withstand high temperatures, impacts, and wear and tear. It retains its strength even in extreme conditions, making it suitable for heavy-duty applications in industries like automotive, aerospace, and manufacturing. Aesthetic Appeal: Stainless steel's shiny and polished appearance adds a touch of elegance to various products, making it a favored choice in architectural structures, decorative items, and consumer goods. Hygienic Properties: The smooth and non-porous surface of stainless steel makes it easy to clean and maintain. It is widely used in the food and beverage industry, healthcare facilities, and laboratories where cleanliness and hygiene are of utmost importance. Applications of Stainless Steel Stainless steel finds applications in a wide range of industries and sectors. Some common examples include: Construction: Stainless steel is used in structural components, reinforcement bars, and cladding for buildings and infrastructure projects due to its strength, corrosion resistance, and aesthetic appeal. Kitchenware and Appliances: From cookware, cutlery, and kitchen sinks to refrigerators and dishwashers, stainless steel is a popular choice for its durability, hygiene, and modern look. Medical and Pharmaceutical: Stainless steel is widely used in medical instruments, surgical tools, implants, and equipment due to its corrosion resistance, ease of sterilization, and biocompatibility. Automotive: Stainless steel is employed in exhaust systems, fuel tanks, body panels, and other automotive components for its heat resistance, strength, and corrosion resistance. Energy and Power: Stainless steel is utilized in power generation facilities, including nuclear, solar, and thermal power plants, for its resistance to high temperatures and corrosion. My Personal Experience with Stainless Steel Throughout my engineering career, I have had the opportunity to work extensively with stainless steel in various projects. Its durability, corrosion resistance, and aesthetic appeal have always impressed me. Whether it was designing architectural structures or developing industrial equipment, stainless steel consistently proved its reliability and versatility. Its ability to withstand challenging conditions and maintain its integrity over time has made it a material of choice for many applications. Types of Stainless Steel for Welding: A Comprehensive Guide Understanding Stainless Steel Grades Stainless steel is classified into different grades based on its chemical composition and properties. The most commonly used stainless steel grades for welding include: Austenitic Stainless Steel (300 Series): This group of stainless steel is highly popular for its excellent corrosion resistance, ductility, and weldability. The 300 series, which includes grades like 304 and 316, is commonly used in a wide range of applications, including food processing equipment, chemical plants, and architectural structures. Ferritic Stainless Steel (400 Series): Ferritic stainless steel is known for its magnetic properties and high resistance to corrosion and stress corrosion cracking. While it is not as easily weldable as austenitic stainless steel, it can still be welded successfully using proper techniques. Ferritic stainless steel is commonly used in automotive exhaust systems, heat exchangers, and appliances. Martensitic Stainless Steel (400 Series): Martensitic stainless steel is known for its high strength, hardness, and wear resistance. It is less corrosion-resistant compared to austenitic and ferritic stainless steel but can still be welded using preheating and post-weld heat treatment. Martensitic stainless steel is often used in cutlery, surgical instruments, and turbine blades. Duplex Stainless Steel: Duplex stainless steel is a combination of austenitic and ferritic stainless steel, offering a balance of strength and corrosion resistance. It is commonly used in industries such as oil and gas, chemical processing, and marine applications where both high strength and excellent corrosion resistance are required. Considerations for Welding Stainless Steel Welding stainless steel requires careful consideration of several factors to ensure successful and high-quality welds. Here are a few key considerations: Proper Preparation: Prior to welding, it is essential to clean the stainless steel surface thoroughly to remove any contaminants or oxidation. This helps prevent weld defects and ensures a strong bond. Selection of Filler Material: Choosing the correct filler material is crucial for achieving proper weld strength and corrosion resistance. Matching the filler material to the base metal grade is recommended for optimal results. Controlled Heat Input: Stainless steel has a lower thermal conductivity compared to other metals, making it more susceptible to distortion and heat-affected zone (HAZ) issues. Controlling the heat input and using appropriate welding techniques, such as pulse welding, can help minimize these challenges. Post-Weld Treatment: Depending on the stainless steel grade, post-weld treatment may be necessary to restore corrosion resistance and eliminate any sensitization issues. Common post-weld treatments include passivation and annealing. My Personal Experience with Welding Stainless Steel Throughout my welding career, I have worked extensively with different types of stainless steel. I have found that proper selection of stainless steel grade, along with attention to detail in terms of surface preparation, filler material, and heat control, is critical for achieving strong and durable welds. Adhering to best practices and following industry guidelines have helped me successfully weld stainless steel in various projects. Welding Techniques for Stainless Steel: Tips and Insights from my Experience 1. TIG Welding (Gas Tungsten Arc Welding) TIG welding is a commonly used technique for welding stainless steel. It offers precise control over the welding process and produces clean, high-quality welds. Here are some tips for TIG welding stainless steel: Select the Right Tungsten Electrode: Use a thoriated or ceriated tungsten electrode for best results. These electrodes provide good arc stability and can withstand higher temperatures. Choose the Correct Filler Wire: Match the filler wire composition to the stainless steel grade being welded. This ensures proper compatibility and optimal weld strength. Maintain Proper Shielding Gas: Use pure argon or a helium/argon mix as the shielding gas to protect the weld pool from atmospheric contamination and prevent oxidation. Control Heat Input: Stainless steel has a lower thermal conductivity compared to other metals, so it is essential to control the heat input to avoid distortion and overheating. TIG welding allows for precise heat control, enabling you to maintain the desired temperature range. 2. MIG Welding (Gas Metal Arc Welding) MIG welding is another commonly used technique for welding stainless steel. It is a faster process than TIG welding and offers good productivity. Here are some tips for MIG welding stainless steel: Use the Correct Shielding Gas: Use a shielding gas mixture of 90% helium and 10% argon (or 98% argon and 2% carbon dioxide) to ensure proper shielding and minimize the risk of weld contamination. Select the Right Wire: Use stainless steel MIG wire with the appropriate composition for the stainless steel grade being welded. This ensures good weld strength and corrosion resistance. Adjust Wire Feed and Voltage Settings: Fine-tune the wire feed speed and voltage settings to achieve a stable arc and proper penetration. Experimentation may be required to find the optimal settings for your specific application. Clean the Weld Joint: Ensure the weld joint is clean and free from any contaminants, such as oil, grease, or rust, before welding. This promotes better fusion and reduces the risk of defects in the weld. 3. Stick Welding (Shielded Metal Arc Welding) Stick welding, also known as shielded metal arc welding (SMAW), is a versatile technique that can be used for welding stainless steel. While not as commonly used as TIG or MIG welding for stainless steel, stick welding can be a viable option in certain situations. Here are some tips for stick welding stainless steel: Use the Correct Electrode: Select a stainless steel electrode specifically designed for welding stainless steel. Electrodes such as E308, E309, or E316 are commonly used, depending on the stainless steel grade. Clean the Weld Joint: Similar to other welding techniques, ensuring a clean weld joint is essential for successful stick welding. Remove any contaminants and ensure proper fit-up before starting the welding process. Control Current and Arc Length: Maintain the appropriate current setting and control the arc length to achieve good penetration and fusion. Proper arc length helps prevent excessive heat input and reduces the risk of weld defects. My Personal Experience with Welding Stainless Steel Throughout my welding career, I have had the opportunity to work with stainless steel using various welding techniques. I have found that the choice of welding technique depends on factors such as the specific application, material thickness, and desired weld quality. Each technique has its advantages and considerations, and it is important to select the right technique based on the project requirements. Preparations for Welding Stainless Steel: Tips and Insights for Successful Welds 1. Cleanliness is Key Before starting the welding process, it is crucial to ensure the stainless steel surfaces are clean and free from any contaminants. Stainless steel is prone to contamination from oils, greases, dirt, and oxides, which can adversely affect the quality of the welds. Use a degreaser or a suitable cleaning agent to remove any residues, and then use a stainless steel wire brush or a dedicated stainless steel cleaning tool to thoroughly clean the surfaces. 2. Proper Joint Preparation Achieving a strong and reliable weld begins with proper joint preparation. Depending on the type of joint and welding technique, you may need to perform tasks such as beveling, chamfering, or grooving the edges to ensure proper fusion and penetration. Follow the recommended joint design and dimensions specific to your welding project, and make sure the fit-up is precise. 3. Selecting the Right Filler Material Choosing the correct filler material is critical for successful welding of stainless steel. The filler material must match the base metal in terms of composition and properties to ensure compatibility and optimal weld strength. Consider the specific stainless steel grade, the application, and any specific requirements, such as corrosion resistance or high-temperature resistance, when selecting the filler material. 4. Shielding Gas Selection Shielding gas plays a vital role in protecting the weld pool from atmospheric contamination and ensuring the quality of the weld. For most stainless steel welding applications, an inert gas, such as pure argon or a mixture of argon and helium, is commonly used as the shielding gas. The selection of the shielding gas depends on factors such as the stainless steel grade, welding technique, and specific requirements of the application. 5. Proper Welding Technique and Parameters The choice of welding technique and the appropriate parameters are crucial for successful welding of stainless steel. Whether you opt for TIG (Gas Tungsten Arc Welding), MIG (Gas Metal Arc Welding), or another technique, make sure to follow the recommended procedures and settings. Experimentation and fine-tuning may be necessary to achieve the desired results, especially when dealing with different stainless steel grades or thicknesses. 6. Post-Weld Treatment Post-weld treatment is often necessary to restore the properties of the welded stainless steel and ensure optimal corrosion resistance. Depending on the specific stainless steel grade and the application requirements, post-weld treatments such as passivation, pickling, or annealing may be recommended. These treatments help remove any impurities, restore the passive oxide layer, and improve the overall integrity of the weld. My Personal Experience with Welding Stainless Steel As a professional welder, I have worked extensively with stainless steel, and I have come to understand the importance of thorough preparation for successful welding. Taking the time to clean the surfaces, prepare the joints, select the right filler material, and follow proper welding techniques and parameters has always been the foundation of my welding process. Additionally, post-weld treatments have played a crucial role in ensuring the durability and corrosion resistance of the welded stainless steel components. Challenges in Stainless Steel Welding: Overcoming Hurdles for High-Quality Welds 1. Sensitivity to Heat Stainless steel has a lower thermal conductivity compared to other metals, which makes it more sensitive to heat input during the welding process. Excessive heat can result in distortion, warping, and heat-affected zone (HAZ) issues, compromising the integrity of the welds. To overcome this challenge, it is essential to control the heat input by utilizing appropriate welding techniques, such as pulse welding or using lower amperage settings. Additionally, preheating and post-weld heat treatment can help alleviate some of the heat-related concerns. 2. Susceptibility to Weld Defects Stainless steel is prone to several welding defects, including porosity, lack of fusion, and cracking. These defects can compromise the strength and corrosion resistance of the welds. To mitigate these issues, it is crucial to follow proper welding procedures, maintain cleanliness, and ensure proper joint preparation. Using the correct shielding gas, selecting the appropriate filler material, and employing proper welding techniques, such as back purging for root passes, can significantly reduce the occurrence of weld defects. 3. Chromium Carbide Precipitation During welding, stainless steel is susceptible to the formation of chromium carbides in the HAZ, a phenomenon known as chromium carbide precipitation (CCP). CCP can result in reduced corrosion resistance and compromised weld integrity. To minimize this challenge, it is important to select stainless steel grades with low carbon content or use stabilizing elements such as titanium or niobium. Additionally, interpass temperature control and post-weld heat treatment can be employed to prevent or mitigate CCP. 4. Contamination and Oxidation Stainless steel is highly sensitive to contamination and oxidation, which can lead to weld defects and compromised corrosion resistance. Proper cleaning of the surfaces before welding, including removing any oils, greases, or oxides, is crucial. Additionally, maintaining a suitable shielding gas atmosphere, using appropriate welding techniques, and protecting the weld pool from atmospheric exposure can minimize the risk of contamination and oxidation. 5. Dissimilar Metal Welding Welding stainless steel to dissimilar metals, such as carbon steel or other alloys, presents unique challenges due to the differences in composition and properties. The potential for galvanic corrosion, different thermal expansion rates, and varying melting points must be carefully considered. Proper joint design, selection of compatible filler materials, and employing techniques like buttering or using transition joints can help overcome the challenges associated with dissimilar metal welding. My Personal Experience with Stainless Steel Welding Throughout my welding career, I have encountered and overcome various challenges in stainless steel welding. By employing proper techniques, adhering to best practices, and continuously learning from experience, I have been able to consistently produce high-quality welds in stainless steel. It is important to approach each welding project with a thorough understanding of the challenges involved and a commitment to implementing effective solutions. Safety Considerations in Stainless Steel Welding: Protecting Yourself and Ensuring a Secure Work Environment 1. Personal Protective Equipment (PPE) When welding stainless steel, wearing appropriate personal protective equipment is vital to protect yourself from potential hazards. Here are some essential PPE items for stainless steel welding: Welding Helmet: Invest in a high-quality welding helmet with a suitable shade level to shield your eyes and face from harmful UV radiation and sparks. Safety Glasses: Wear safety glasses with side shields to provide additional protection for your eyes against flying debris, sparks, and UV radiation. Welding Gloves: Choose welding gloves that are specifically designed for stainless steel welding to protect your hands from heat, sparks, and molten metal. Protective Clothing: Wear flame-resistant, durable, and properly fitting clothing, such as a welding jacket or apron, to shield your body from sparks, UV radiation, and potential burns. Respiratory Protection: Depending on the welding process and the presence of fumes or gases, respiratory protection may be required. Use a respirator or a welding mask equipped with appropriate filters to prevent inhalation of harmful fumes or particulates. 2. Ventilation and Extraction Proper ventilation is crucial in stainless steel welding to remove fumes and gases from the work area. Stainless steel welding produces chromium-containing fumes, which can be hazardous if inhaled. Ensure that your work area is well-ventilated, either through natural ventilation or mechanical ventilation systems, to maintain clean air quality. Consider using local exhaust ventilation (LEV) systems or fume extractors to effectively capture and remove welding fumes at the source. 3. Fire Prevention and Fire Extinguishers Welding involves high temperatures and sparks, creating a potential fire hazard. Take the following precautions to prevent fires: Clear the Work Area: Remove any flammable materials or combustible substances from the vicinity of your work area to reduce the risk of ignition. Fire Extinguishers: Keep appropriate fire extinguishers readily available and ensure they are properly maintained. Familiarize yourself with the types of extinguishers and their appropriate use. Fire Watch: Assign someone as a fire watch during and after welding operations to monitor the area for potential fire hazards. 4. Electrical Safety Stainless steel welding requires electrical power, so it is essential to prioritize electrical safety. Here are some key considerations: Grounding: Ensure that your welding equipment and workpieces are properly grounded to prevent electrical shock hazards. Cables and Wiring: Regularly inspect cables and wiring for signs of damage or wear. Replace any faulty or worn-out components to maintain electrical safety. Electrical Connections: Make secure and proper electrical connections to avoid loose connections or short circuits. 5. Training and Education Proper training and education are fundamental to maintaining a safe work environment. Ensure that you and your team receive adequate training on stainless steel welding techniques, safety procedures, and emergency protocols. Stay updated with the latest safety guidelines and regulations, and encourage open communication about safety concerns among team members. My Personal Experience with Stainless Steel Welding Safety Throughout my welding career, I have witnessed the importance of prioritizing safety in stainless steel welding. By consistently following safety protocols, using appropriate PPE, maintaining proper ventilation, and staying vigilant about potential hazards, I have ensured a secure work environment for myself and my team. Safety is not just a checklist; it is a mindset that should guide every welding operation. Post-Welding Procedures: Ensuring Quality and Longevity of Welded Structures 1. Weld Inspection and Quality Control After completing a weld, thorough inspection and quality control measures are necessary to assess the integrity of the weld and identify any potential defects. Here are some important steps to consider: Visual Inspection: Conduct a visual inspection of the weld to identify surface irregularities, such as cracks, porosity, or incomplete fusion. Ensure proper lighting and use magnification if needed. Non-Destructive Testing (NDT): Perform non-destructive testing methods, such as ultrasonic testing, magnetic particle testing, or dye penetrant testing, to detect any internal or subsurface defects that may not be visible to the naked eye. Dimensional Measurement: Use appropriate measuring tools to verify the dimensions of the weld and compare them against the specified tolerances. Documentation: Maintain detailed records of the inspection results, including photographs and reports, for future reference and quality assurance. 2. Post-Weld Cleaning and Surface Treatment Proper cleaning and surface treatment after welding play a crucial role in maintaining the integrity and corrosion resistance of the welds. Follow these steps for effective post-weld cleaning: Removal of Slag and Spatter: Remove any residual slag or spatter from the weld using appropriate tools such as wire brushes, chipping hammers, or grinding techniques. Surface Cleaning: Thoroughly clean the weld and adjacent areas using suitable solvents or detergents to remove any contaminants, such as oil, grease, or dirt. Passivation: For stainless steel welds, consider passivating the surface to enhance its corrosion resistance. Passivation involves treating the surface with a chemical solution to remove any free iron and restore the protective oxide layer. Surface Treatment: Apply suitable coatings or treatments, such as paint, galvanization, or metal plating, to protect the weld and surrounding areas from environmental factors and extend their service life. 3. Stress Relieving and Heat Treatment Certain welding processes, material combinations, or joint configurations may induce residual stresses in the weld and surrounding areas. Stress relieving and heat treatment can help mitigate these residual stresses and improve the overall structural integrity. Consider the following techniques: Heat Treatment: Employ heat treatment methods, such as annealing, normalizing, or tempering, depending on the material and weld configuration, to relieve stresses and improve the weld's mechanical properties. Post-Weld Heat Treatment (PWHT): In specific cases, where high-strength welds or heavy sections are involved, PWHT may be required to optimize the weld's properties and reduce the risk of cracking or distortion. 4. Post-Weld Testing and Performance Evaluation To ensure the weld meets the desired performance requirements, post-weld testing and performance evaluation are essential. Consider the following steps: Mechanical Testing: Perform mechanical tests, such as tensile testing, bend testing, or impact testing, to assess the weld's mechanical properties and conformity to the specified standards. Corrosion Testing: Conduct corrosion testing, such as salt spray testing or electrochemical analysis, to evaluate the weld's resistance to corrosion in specific environments. Performance Evaluation: Monitor the welded structure's performance in its intended application over time to detect any signs of degradation, such as cracks, deformation, or reduced functionality. My Personal Experience with Post-Welding Procedures Throughout my welding career, I have witnessed the significant impact that thorough post-welding procedures can have on the quality and longevity of welded structures. By diligently performing inspections, implementing proper cleaning and surface treatment, considering stress-relieving techniques, and conducting relevant testing and evaluation, I have been able to deliver welds of exceptional quality that withstand the test of time. References: Unlocking the Power of Credible Sources in Your Work Why are References Important? References play a crucial role in several aspects of your work, including: Credibility: References provide evidence of your research and demonstrate that your work is based on reliable and authoritative sources. By citing credible references, you enhance the trustworthiness of your work and build your own reputation as a knowledgeable and well-informed individual. Validation of Ideas: References lend weight to your ideas and arguments by showing that they are supported by existing research and expert opinions. They provide a solid foundation for your claims and enhance the persuasiveness of your work. Avoiding Plagiarism: References help you give credit to the original authors and avoid plagiarism. By acknowledging the contributions of others, you maintain academic integrity and uphold ethical standards in your work. Access to Additional Information: References not only support your own ideas but also provide readers with the opportunity to delve deeper into the topic. They serve as gateways to additional resources, allowing readers to explore related studies, theories, and perspectives. How to Utilize References Effectively To harness the power of references and elevate your work, follow these practical tips: 1. Choose Credible Sources Ensure that the references you use are from reputable and authoritative sources. Academic journals, scholarly books, government publications, and recognized experts in the field are examples of reliable sources. Be discerning in your selection to ensure the credibility and reliability of the information you present. 2. Provide Sufficient Context When citing references, provide enough context to help readers understand the relevance of the source to your work. Briefly summarize the key findings or arguments of the reference and explain how they contribute to your own ideas or research. 3. Use a Consistent Referencing Style Follow a consistent referencing style throughout your work, such as APA, MLA, or Chicago style. This not only ensures uniformity but also facilitates easy retrieval of the sources for readers who want to explore them further. 4. Blend Direct and Indirect Citations Blend direct quotations and indirect citations smoothly into your writing. Direct quotations allow you to use the author's exact words when they are particularly impactful or provide unique insights. Indirect citations, on the other hand, involve paraphrasing or summarizing the author's ideas in your own words while still attributing them to the original source. 5. Organize and Format References Properly Create a comprehensive reference list at the end of your work, following the guidelines of the chosen referencing style. Include all the necessary information, such as author names, publication titles, and publication dates, to facilitate accurate retrieval of the sources. My Personal Experience with References Throughout my academic and professional journey, I have realized the power of references in elevating the quality and credibility of my work. By diligently researching and selecting credible sources, organizing references systematically, and providing sufficient context for each citation, I have been able to create work that is well-supported, persuasive, and respected within my field. FAQ: Stainless Steel Welding What is filler metal in welding? Filler metal is a type of metal used to bridge the gap between the two pieces being welded together, adding strength and integrity to the joint. What is fabrication in the context of welding? Fabrication in welding refers to the process of cutting, bending, and assembling metal pieces to create a final product or structure. What is mild steel, and how is it used in welding? Mild steel is a low-carbon steel that is easy to work with and commonly used in welding for various applications due to its versatility and affordability. What factors should you consider when choosing a welding method? When choosing a welding method, you should consider the material being welded, the thickness of the material, the desired strength of the weld, and the specific application. What is a welding machine, and how does it work? A welding machine is a device that generates the necessary heat and electricity to create a weld by melting the metal at the joint and fusing it together. What is a weld bead in welding? A weld bead is the continuous line of metal deposited along the joint during the welding process. What is welding wire, and how is it used? Welding wire is a consumable filler material used in welding to provide the additional metal needed to create a weld between the two pieces. What is resistance welding, and when is it used? Resistance welding is a process that uses electric current and pressure to join metals together, often used for spot welding or seam welding. How do you learn how to weld effectively? Learning how to weld effectively requires practice, proper training, and a good understanding of the different welding techniques and materials. How is stainless steel different from welding regular steel? Stainless steel contains chromium, which gives it unique properties such as corrosion resistance and heat resistance, making it more challenging to weld compared to regular steel. What factors influence the choice of welding method for a specific job? The choice of welding method is influenced by factors such as the type of material, joint configuration, thickness, required weld quality, and environmental conditions. What happens during the formation of a weld puddle in welding? In welding, a weld puddle is formed when the heat from the welding process melts the base metal and filler material, creating a molten pool at the joint. How does a welding gun contribute to the welding process? A welding gun is a handheld tool that allows the welder to control the flow of electricity and the delivery of the welding wire, enabling precise welding operations. What type of welding is often used for joining thick steel components? Beam welding, such as submerged arc welding (SAW), is commonly used for joining thick steel components due to its high deposition rates and deep penetration capabilities. Is it challenging to weld stainless steel, and why? Welding stainless steel can be challenging due to its high chromium content, which forms a protective oxide layer during welding and makes achieving proper fusion more difficult. What are some common welding methods used for stainless steel? Common welding methods for stainless steel include TIG (Tungsten Inert Gas) welding, MIG (Metal Inert Gas) welding, and stick welding (SMAW). How important are welding skills when working with stainless steel? Welding skills are crucial when working with stainless steel because precise control of heat input and electrode selection is essential to achieve clean and sound welds. What cooling process is commonly used after welding stainless steel? After welding stainless steel, various cooling methods, such as air cooling, water cooling, or post-weld heat treatments, are used to control the weld's microstructure and properties. Can stainless steel be welded with conventional gas welding methods? Yes, stainless steel can be welded using gas welding methods, such as oxyacetylene welding, but it requires careful control of heat and the use of appropriate filler materials. What type of welding is suitable for single-sided welding of stainless steel? TIG (Tungsten Inert Gas) welding with inert backing gas protection is often used for single-sided welding of stainless steel to prevent oxidation and ensure high-quality welds. In summary You cannot gather all the valuable features in one product. There are certain brands, which only can offer you an optimal product with more potential.