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Grade F738M Class A2-80 321
USA UNS S32100
Corresponding Standard ASTM F738M-2002
Stainless Steel Metric Bolts, Screws, and Studs
Classification Austenitic Stainless Steel
F738M Class A2-80 321 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni More
Minimum Value - - - - - 17 9 Ti≥5C
Maximum Value 0.08 1 2 0.045 0.03 19 12
F738M Class A2-80 321 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Hardness
HBW
M1.6~M5 SH ≥800 HR（C23~C36）
M6~M20 SH ≥800 ≥600 HR（C23~C36）
＞M20~M24 SH ≥700 ≥500 HR（B96~C33）
＞M24~M30 SH ≥650 ≥400 HR（B93~C30）
＞M30~M36 SH ≥600 ≥300 HR（B89~C28）
• D-nominal thread diameter
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
06Cr18Ni11Ti S32168 321 SUS 321 STS 321 321 S32100 X6CrNiTi 18-10 4541-321-00-I X6CrNiTi 18-10
(X10CrNiTi 18-9) 		1.4541 Z6CNT 18-10 X6CrNiTi 18-10 1.4541 09Х18Н10Т
Х18Н10Т 		2337 321S12
321S31
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
06Cr18Ni11Ti
(0Cr18Ni11Ti) 		S32168 321 SUS 321 STS 321 321 S32100 X6CrNiTi 18-10 X6CrNiTi 18-10
(X10CrNiTi 18-9) 		1.4541 Z6CNT 18-10 X6CrNiTi 18-10 1.4541 09Х18Н10Т 2337 321S12
321S31
3 Approximate Comparison Table Austenitic Stainless Steel
China Japan United States International Organization for Standardization Germany France Russia United Kingdom
GB JIS ASTM/AISI UNS ISO DIN EN/DIN NF EN/NF GOST BS EN/BS
0Cr18Ni11Ti
0Cr18Ni9Ti 		SUS321 321 S32100 15 X10CrNiTi18-9 Z6CNT18.10 08Х18Н10Т 321S12
321S20
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
06Cr18Ni11Ti
(0Cr18Ni11Ti) 		S32168 SUS321 321 S32100 X6CrNiTi18-10 4541-321-00-I X6CrNiTi18-10 1.4541

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