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Grade TP 321 H
USA UNS S32109
Corresponding Standard ASTM A376/A376M-2019
Seamless Austenitic Steel Pipe for High-Temperature Service
Classification Austenitic Stainless Steel
TP 321 H Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Ti More
Minimum Value 0.04 - - - - 17 9 - 4C≤Ti≤0.7
Maximum Value 0.1 0.75 2 0.045 0.03 19 13 0.7
TP 321 H Mechanical Properties
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
%
t≤9.5mm ≥515 ≥205 (Longitudinal 35, Transverse 25), min
t＞9.5mm ≥480 ≥170 (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
07Cr19Ni11Ti
(1Cr18Ni11Ti) 		S32169 321 HTP SUS 321 HTP
SUS 321 H 		STS 321 HTP 321H S32109 X7CrNiTi 18-10
X6CrNiTiB 18-10 		4940-321-09-I X12CrNiTi 18-9 1.4878 Z6CNT 18-12 X8CrNiTi 18-10
X6CrNiTiB 18-10 		1.4878
1.4941
1.4940 		12Х18Н10Т 2337 321S20
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
07Cr19Ni11Ti
(1Cr18Ni11Ti) 		S32169 321 SUS 321 STS 321 321H S32109 X7CrNiTi 18-10 X12CrNiTi 18-9 1.4878 Z6CNT 18-12 X10CrNiTi 18-10 1.4878 12Х18Н10Т 2337 321S20
3 Approximate Comparison Table Austenitic Heat-Resistant Steel
Japan United States International Organization for Standardization France European Standard Russia Sweden United Kingdom
JIS ASTM UNS ISO NF EN/NF EN Numerical Grade GOST SS BS EN/BS
SUS321H 321H S32109 X7CrNiTi18-10 Z6CNT18-10 X8CrNiTi18-10 1.4878 12KH18N10T 2337 321S12
321S51
TP321H Corresponding Standards(Same grade name, different standards)
1 YB /T 4323-2013
TP321H
2 ASTM A376/A376M-2019
TP 321 H S32109

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