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Grade 321H
USA UNS S32109
Corresponding Standard SAE J405-1998
（R）Chemical Composition of SAE Wrought Stainless Steels
Classification Austenitic Stainless Steel
321H Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Ti
Minimum Value 0.04 - - - - 17 9 0.16
Maximum Value 0.1 0.75 2 0.045 0.03 19 12 0.7
New and Old Grade Replacement List
Corresponding Standard Grade
SAE J405-1998
Grade
USA UNS
SAE J405-2018
USA UNS
AISI
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
321H Corresponding Standards(Same grade name, different standards)
1 ASTM A959-2004
321H S32109
2 ASTM A240/240M-2018
321H S32109
3 SAE J405-1998
321H S32109
4 SAE J405-2018
321H S32109
5 ASTM A240/A240M-2020
321H S32109
6 ASTM A959-2019
321H S32109
7 ASTM A479/A479M-2018
321H S32109
8 ASTM A403/A403M-2022
321H WP321H S32109
9 Q/RP 007-2018
321H

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