317L Stainless Steel Plate
317L stainless steel plate is a high-molybdenum, low-carbon austenitic stainless steel designed to withstand highly corrosive environments. It performs particularly well against chloride pitting and stress corrosion cracking, with superior properties compared to 316L.
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Product Introduction

317L Stainless Steel Plate is a low-carbon, molybdenum-bearing austenitic stainless steel designed to provide superior resistance to pitting and crevice corrosion in more aggressive environments than 316L can reliably handle. The key difference is its significantly higher molybdenum content (3.0-4.0% vs. 2.0-3.0% in 316L) and increased chromium and nickel.

This alloy is the premier choice for handling hot organic and inorganic acids, sulfurous acid, and a wide range of chemical process streams, particularly those containing chlorides. Its "L" grade low-carbon chemistry ensures excellent resistance to intergranular corrosion following welding or stress-relieving, making it ideal for heavy-gauge welded fabrications in the chemical processing, pulp & paper, and flue gas desulfurization industries.

Product parameters


Item / ParameterSpecification for 317L (UNS S31703)Notes / Significance
Key FeatureHigh-Molybdenum "L" Grade. Superior localized corrosion resistance in aggressive acids and chlorides, with good weldability.Direct upgrade from 316L for more severe service.
Common DesignationsUNS S31703, AISI 317L, EN 1.4438, X2CrNiMoN18-12-4, SUS 317LEnsure your Mill Test Certificate (MTC) references these standards.
Chemical Composition (Typical wt.%)C: ≤ 0.030Cr: 18.0 - 20.0Ni: 11.0 - 15.0Mo: 3.0 - 4.0 (Key upgrade)
N: May be added (≤0.20)
Higher Mo, Cr, and Ni than 316L. N addition further boosts pitting resistance (see 317LN).
Mechanical Properties (Annealed)Tensile Strength (Rm): ≥ 515 - 550 MPa
Yield Strength (Rp0.2): ≥ 205 - 240 MPa
Elongation (A): ≥ 35 - 40%
Hardness (HB): ≤ 217
Mechanical properties are generally similar to 316L.
Corrosion ResistancePitting Resistance Equivalent (PREN): ~30-33
Critical Pitting Temp. (CPT): Higher than 316L.
Excellent Resistance To: Sulfurous, phosphoric, many organic acids, chloride solutions.
Quantifiably better than 316L in chloride and acid media.
Key Standards (Plate)ASTM A240/A240MASME SA-240EN 10028-7 (Flat products for pressure purposes)ASTM A240 is the most common international procurement standard.

Surface selection

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Packaging and transportation

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FACTORY SHOW

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FAQ

Q:What about your price? 
A:Our price is very competitive because we are a factory. Feel free to contact us if you are interested in our products. 

Q:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.

Q:What product information do I need to provide?
A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase. 

Q:Does the product have quality inspection before loading? 
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we
accept the third party inspection absolutely. 

Q:How about the delivery time? 
A:Within 3-15 days after we confirm you requirement. 

Q:What is your terms of payment ?
A:T/T, L/C at sight, Cash, Western Union are all accepted if you have other payment,please contact me. 

Q: Do you provide samples? 
A:Yes,we could offer the sample for you to test but please pay freight fee.

Q:How do we trust your company? 
A:We are a specialized company focusing on global steel trading and supply chain services. Our mission is to provide high-quality, multi-specification, and one-stop steel products and solutions to customers worldwide.

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