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Grade A194 Grade 8TA
USA UNS S32100
AISI
American Iron and Steel Institute		 321
Corresponding Standard ASTM A194/A194M-2023
Standard Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
Classification Austenitic Stainless Steel
Properties Corrosion Resistance High-Temperature Resistance
A194 Grade 8TA Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni N More
Minimum Value - - - - - 17 9 - Ti：5×(C+N)~0.70
Maximum Value 0.08 1 2 0.045 0.03 19 12 0.1
A194 Grade 8TA Mechanical Properties
product Heat Treatment or Condition
Hardness
HBW
Finished Nuts Solid Solution Treatment 126~192HBW
60~90HRB
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
A194Grade8TA Corresponding Standards(Same grade name, different standards)
1 ASTM A194/194M-2016
A194 Grade 8TA S32100 Type 321
2 ASTM A194/A194M-2023
A194 Grade 8TA S32100 321

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