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Grade 321S31
Other Names
Corresponding Standard BS 1501-3-1990
Steels for pressure purposes — Part 3: Specification for corrosion-and heat-resisting steels: plates, sheet and strip
Classification Austenitic Stainless Steel
321S31 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni More
Minimum Value - - - - - 17 9 Ti: 5C~0.8
Maximum Value 0.08 1 2 0.045 0.025 19 12
321S31 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
%
Solution Heat Treatment 1020~1120°C
②③④		 510~710 Rp0.2: ≥200
Rp1.0: ≥235		 ≥35
1 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO Numerical Grade DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr18Ni11Ti S32168 321 SUS 321 STS 321 321 S32100 X6CrNiTi 18-10 4541-321-00-I X6CrNiTi 18-10
(X10CrNiTi 18-9) 		1.4541 Z6CNT 18-10 X6CrNiTi 18-10 1.4541 09Х18Н10Т
Х18Н10Т 		2337 321S12
321S31
2 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr18Ni11Ti
(0Cr18Ni11Ti) 		S32168 321 SUS 321 STS 321 321 S32100 X6CrNiTi 18-10 X6CrNiTi 18-10
(X10CrNiTi 18-9) 		1.4541 Z6CNT 18-10 X6CrNiTi 18-10 1.4541 09Х18Н10Т 2337 321S12
321S31
3 Approximate Comparison Table
China Japan United States Germany France European Standard Russia Sweden United Kingdom
GB JIS ASTM DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
0Cr18Ni10Ti
1Cr18Ni11Ti
H0Cr20Ni10Ti 		SUS321 321 X10CrNiTi18-9
X6CrNiTi18-10 		Z6CNT18-10 X6CrNiTi18-10 1.4541 08KH18N10T
08KH18N12T
12KH18N10T 		2337 321S31
321S31 Corresponding Standards(Same grade name, different standards)
1 BS 970-3-1991
321S31
2 BS 1501-3-1990
321S31 CrNi 18/9 Ti

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