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USA UNS S31803
Corresponding Standard ASTM A270/A270M-2015
Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing
Classification Duplex Stainless Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo N
Minimum Value - - - - - 21 4.5 2.5 0.08
Maximum Value 0.03 1 2 0.03 0.02 23 6.5 3.5 0.2
Mechanical Properties
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
≥620 ≥450 ≥25 HRC
≤30.5
1 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard
GB ISC CNS JIS KS UNS ISO Numerical Grade DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade
022Cr22Ni5Mo3N
022Cr23Ni5Mo3N 		S22253
S22053 		329J3L SUS 329J3L STS 329J3L S31803
S32205 		X2CrNiMoN 22-5-3 4462-318-03-I X2CrNiMoN 22-5-3 1.4462 X2CrNiMoN 22-5-3 X2CrNiMoN 22-5-3 1.4462
2 Approximate Comparison Table
China United States Germany
GB Commercial Grade UNS W-Nr.
2205 F51 S31803 1.4462
3 Approximate Comparison Table
China Japan United States International Organization for Standardization United Kingdom
GB ISC JIS UNS ISO Numerical Grade BS EN/BS
022Cr22Ni5Mo3N
(GB/T 39033) 		S22253 SUS 329J3L
(JIS G4308-2013) 		S31803
(ASTM A595-16) 		X2CrNiMoN22-5-3
(ISO 15510:2014) 		4462-318-03-Ⅰ X2CrNiMoN22-5-3/1.4462
(BS EN 10083:2014)

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