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USA UNS S31726
ASTM
Specification or Grade		 317LMN
Corresponding Standard ASTM A240/240M-2018
Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels and General Applications
Classification Austenitic Stainless Steel
Properties Corrosion Resistance
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo N
Minimum Value - - - - - 17 13.5 4 0.1
Maximum Value 0.03 0.75 2 0.045 0.03 20 17.5 5 0.2
Mechanical Properties
condition Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
Thick plates, thin plates, strip products ≥550 ≥240 ≥40 ≤223
1 Approximate Comparison Table
China United States International Organization for Standardization European Standard
GB ISC AISI UNS ISO Numerical Grade EN Numerical Grade
022Cr19Ni16Mo5N S31723 317LMN S31726 X2CrNiMoN17-13-5
X2CrNiMoN 18-15-5 		4439-317-26-E
4483-317-26-I 		X2CrNiMoN17-13-5 1.4439
(1.4483)
2 Approximate Comparison Table
United States France European Standard
ASTM UNS NF EN/NF EN Numerical Grade
317LMN S31726 Z3CND18-14-05Az X2CrNiMoN17-13-5 1.4439

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