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Grade WP310S
USA UNS S31008
AISI
American Iron and Steel Institute		 310S
Corresponding Standard ASTM A403/A403M-2022
Wrought Austenitic Stainless Steel Piping Fittings
Classification Austenitic Stainless Steel
WP310S Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni
Minimum Value - - - - - 24 19
Maximum Value 0.08 1 2 0.045 0.03 26 22
WP310S Mechanical Properties
condition Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
%
Pipe Fittings ≥515 ≥205 Standard round specimen, or small specimen, or strip specimen
L0=4D
long: ≥28
tr: ≥20
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 DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr25Ni20
(0Cr25Ni20) 		S31008 310S SUS 310S STS 310S 310S S31008 ~X12CrNi 23-13
X6CrNi25-20 		X12CrNi 25-21 1.4845 Z12CN 25-20 X12CrNi 23-12
X6CrNi25-20 		1.4845
1.4951 		10Х23Н18 2361 304S24
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
06Cr25Ni20
(0Cr25Ni20)
1Cr25Ni20Si2 		S31008 310S SUS 310S STS 310S 310S S31008 X8CrNi 25-21 X12CrNi 25-21
X8CrNi 25-21 		1.4845
1.4845 		Z12CN 25-20 X8CrNi 25-21 1.4845 ~08Х23Н18 2361 304S24
3 Approximate Comparison Table Austenitic Stainless Steel
China Japan United States International Organization for Standardization European Standard
ISC JIS UNS ISO Numerical Grade Numerical Grade
S31020 SUH310 S31008 X23CrNi25-21 4845-310-09-X 1.4845
4 Approximate Comparison Table Austenitic Heat-Resistant Steel
China Japan United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB JIS ASTM UNS ISO DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
1Cr25Ni20Si2 SUS310S 310S S31008 H16 X8CrNi25-21 Z8CN25-20 X8CrNi25-21 1.4845 10KH23N18
20KH23N18 		2361 310S16
310S24
310S31

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