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Grade A312 TP304
USA UNS S30400
Corresponding Standard ASTM A312/A312M-2025
Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
Classification Austenitic Stainless Steel
A312 TP304 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni
Minimum Value - - - - - 18 8
Maximum Value 0.08 1 2 0.045 0.03 20 11
A312 TP304 Mechanical Properties
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
%
≥515 ≥205 L：≥35；T：≥25
* L—Longitudinal; T—Transverse.
1 Approximate Comparison Table Austenitic Stainless Steel
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
06Cr19Ni9 S30408 304 SUS 304 STS 304 304 S30400 X5CrNi 18-10 4301-304-00-I X5CrNi 18-10
(X5CrNi 18-9) 		1.4301 Z6CN 18-09 X5CrNi 18-10 1.4301 08Х18Н10 2332
2333 		304S15
2 Approximate Comparison Table Austenitic Heat-Resistant Steel
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
06Cr19Ni10
(0Cr18Ni9) 		S30408 304 SUS 304 STS 304 304 S30400 X5CrNi 18-10 X5CrNi 18-10
(X5CrNi 18-9) 		1.4301 Z6CN 18-09 X5CrNi 18-10 1.4301 08Х18Н10 2332
2333 		304S15
3 Approximate Comparison Table Stainless Steels for Cold Heading and Cold Extruding
China Japan United States International Organization for Standardization European Standard
GB ISC JIS ASTM/AISI UNS ISO Numerical Grade EN Numerical Grade
06Cr19Ni10
(0Cr18Ni9) 		S30408 SUS304 304 S30400 X5CrNi18-10 4301-304-00-I X5CrNi18-10 1.4301

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