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USA UNS S30400
ASTM
Specification or Grade		 304
Corresponding Standard ASTM A479/A479M-2018
Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
Classification Austenitic Stainless Steel
Chemical Element Composition Content (%)
Component C ① Si Mn P S Cr Ni
Minimum Value - - - - - 18 8
Maximum Value 0.08 1 2 0.045 0.03 20 10.5
◎ New designations established in accordance with Practice E527 and SAE J1086 published jointly by ASTM and SAE. See ASTM DS-56C, available from ASTM Headquarters.
Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
%
All specifications Annealing ≥ 515 ① ≥205 in 2 in.[50 mm] or 4D
≥ 30		 ≥ 40 ③
All specifications Strain Hardening Level 1 ≥585 ≥ 450 ② in 2 in.[50 mm] or 4D
≥ 30		 ≥ 60 ③
d ≤ 50.8mm Strain Hardening Level 2 ≥655 ≥515 in 2 in.[50 mm] or 4D
≥ 25		 ≥ 40 ③
50.8mm＜d ≤ 63.5mm Strain Hardening Level 2 ≥620 ≥450 in 2 in.[50 mm] or 4D
≥ 30		 ≥ 40 ③
63.5mm＜d ≤ 76.2mm Strain Hardening Level 2 ≥550 ≥380 in 2 in.[50 mm] or 4D
≥ 30		 ≥ 40 ③
◎ d-diameter, t-thickness
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
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
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
China Japan United States Germany France European Standard Russia Sweden United Kingdom
GB JIS ASTM DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
0Cr18Ni9 SUS304 304
304N 		X5CrNi18-10
X5CrNi18-9 		1.4301 X5CrNi18-10
Z5CN18-09
Z6CN18-09
Z7CN18-09 		X5CrNi18-10 1.4301 08KH18N10 2333
2333-02 		304S15
304S31
4 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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