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Grade TP304
USA UNS S30400
Corresponding Standard ASTM A376/A376M-2022
Seamless Austenitic Steel Pipe for High-Temperature Service
Classification Austenitic Stainless Steel
TP304 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni
Minimum Value - - - - - 18 8
Maximum Value 0.08 0.75 2 0.045 0.03 20 11
TP304 Mechanical Properties
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
%
≥515 ≥205 (Longitudinal 35, Transverse 25), min
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
TP304 Corresponding Standards(Same grade name, different standards)
1 YB /T 4323-2013
TP304
2 ASTM A376/A376M-2019
TP 304 S30400
3 ASTM A688/A688M-2018
TP 304 S30400
4 ASTM A409/A409M-2019
TP 304 S30400
5 ASTM A632-2019(2025)
TP 304 S30400
6 ASME SA-249/SA-249M-2023
TP304 S30400
7 ASME SA-409/SA-409M-2023
TP304 S30400
8 ASME SA-688/SA-688M-2023
TP304 S30400
9 ASTM A943/A943M-2001(R2019)
TP304 S30400
10 ASTM A376/A376M-2022
TP304 S30400

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