In the global industrial supply chain, stainless steel has become the core material due to its corrosion resistance, strength and diversified applications. However, in the face of complex international standard systems (such as ASTM, EN, JIS, etc.), many buyers are prone to be confused when choosing stainless steel. This article will take ASTM standards as the core to systematically analyze the classification, performance and applicable scenarios of stainless steel materials, and provide a scientific procurement guide to help you accurately match your needs and reduce procurement risks.
The ASTM (American Association of Materials and Testing) standard is one of the most widely used materials specification systems in the world, covering key indicators such as chemical composition, mechanical properties, and processing technology.ASTM certified steel ensures that the material performance meets the strict requirements of international engineering projects (such as petrochemicals, food machinery, building structures) For example:
1.ASTM A240:Stainless steel plate/thin plate for pressure vessels and general equipment
2.ASTM A276:Stainless steel bars and profiles
3.ASTM A312:Seamless with welded stainless steel pipes
1.Ordinary environment (indoor/dry climate):304 and 400 series can satisfy the requirement.
2.High corrosion environment (coastal/chemical area):Preferred 316L or duplex steel containing molybdenum (e.g. )
3.Extreme temperature scenarios:Pay attention to the oxidation resistance of the material (such as 310S high temperature resistant stainless steel)
1.Strength:Duplex stainless steel (such as S) yield strength can reach 450MPa, which is 2 times that of 304
2.Forming requirements:Choose low-carbon grades (such as 304L) for deep-draining to avoid hardening
1.2B,BA,8K,NO.4,HL and so on are the common surface treatment.
2.The products of different grades and different steel mills will have different tolerances, so it is necessary to clarify the tolerance range before purchasing.
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1.Alternative: Using 201 instead of 304 in non-pressure scenarios can reduce costs by 15% to 20%.In a dry environment, QN can be used instead of 304, reducing the cost by about 30%.
2.Standardization of specifications: Reducing non-standard customization can shorten lead times and reduce scrap rates.
1.Required certification: ISO quality management system, ASTM/EN Original warranty
2.Service capabilities: Inventory turnover (to ensure delivery of urgent orders), technical support team
Case: A customer in the Middle East purchased “non-standard 304″ for seawater desalination equipment, pitting corrosion occurred 6 months later, and the actual test found that the nickel content was less than 8% (lower than the 8% to 10.5% required by ASTM 304).
Laser cutting is recommended to choose low carbon steel (such as 316L), traditional stamping needs to pay attention to the ductility of the material.
Choose a supplier with a global logistics network to avoid project delays due to port strikes and tariff changes.
Mastering the ASTM standards is the first step in optimizing stainless steel procurement. Whether you need marine grade duplex steel, food grade 316L or colored stainless steel for building decoration,we will provide the best plan and quotation in time.
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Post time: Mar-27-