What is 317L stainless steel equivalent?
Jun 13, 2025
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317L stainless steel is equivalent to EN 1.4438, X2CrNiMo18-15-4, and UNS S31703. It is a low-carbon, molybdenum-alloyed austenitic stainless steel with enhanced corrosion resistance compared to 316L.
EN 1.4438 stainless steel.PDF
🔹 What is 317L stainless steel?
317L stainless steel is a low-carbon austenitic stainless steel with high molybdenum (3.0–4.0%) and nickel (11.0–15.0%) content. It offers excellent resistance to pitting, crevice corrosion, and chemical attack, especially in acidic and chloride-rich environments.
Mechanical Properties of 317L Stainless Steel
🔹 Is 317L stainless steel magnetic?
No, 317L stainless steel is non-magnetic in its annealed condition, like most austenitic stainless steels. However, cold working or welding may induce slight magnetism.
🔹 Difference between 317 and 317L Stainless Steel
The main difference is carbon content:
317 has higher carbon, giving it slightly higher strength.
317L has lower carbon (≤0.03%), which provides better weldability and resistance to intergranular corrosion, especially after welding.
🔹 What is the difference between 316 and 317L?
While both are molybdenum-bearing austenitic grades:
317L has higher Mo and Ni content, offering better corrosion resistance, especially against pitting and chemical corrosion.
316 is more economical and suitable for moderately corrosive environments.
🔹 What is the difference between 304 and 317L stainless steel?
317L stainless steel provides far superior corrosion resistance, especially in chloride or acidic environments, due to its higher Mo and Ni levels. In contrast, 304 is cost-effective and ideal for less aggressive environments.
Ready to Upgrade Your Project with 317L Stainless Steel?
Looking for enhanced corrosion resistance and long-lasting performance in aggressive environments? 317L (1.4438) stainless steel is your ideal solution for chemical processing, marine systems, and high-purity industries.
✅ Available in seamless/welded pipes, plates, and fittings
✅ Cut-to-size & surface finishing customization
✅ Compliance with ASTM, EN, and ISO standards
✅ Fast global delivery & mill test certificates included
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