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Grade A194 Grade 8CA
USA UNS S34700
AISI
American Iron and Steel Institute		 347
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
A194 Grade 8CA Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni More
Minimum Value - - - - - 17 9 Nb：10C~1.10
Maximum Value 0.08 1 2 0.045 0.03 19 12
A194 Grade 8CA Mechanical Properties
product Heat Treatment or Condition
Hardness
HBW
Finished Nuts Solid Solution Treatment 126~192HBW
60~90HRB
1 Approximate Comparison Table
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/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr18Ni11Nb S34778 347 SUS 347 STS 347 347 S34700 X6CrNiNb 18-10 X6CrNiNb 18-10
(X10CrNiNb18-9) 		1.4550 Z6CNNb 18-10 X6CrNiNb 18-10 1.4550 08Х18Н12Б 2338 347S17
347S31
2 Approximate Comparison Table
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/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr18Ni11Nb
(0Cr18Ni11Nb) 		S34778 347 SUS 347 STS 347 347 S34700 X6CrNiNb 18-10 X6CrNiNb 18-10
(X10CrNiNb18-9) 		1.4550 Z6CNNb 18-10 X6CrNiNb 18-10 1.4550 08Х18Н12Б 2338 347S17
347S31
A194Grade8CA Corresponding Standards(Same grade name, different standards)
1 ASTM A194/194M-2016
A194 Grade 8CA S34700 Type 347
2 ASTM A194/A194M-2020
A194 Grade 8CA S34700 Type 347
3 ASTM A194/A194M-2023
A194 Grade 8CA S34700 347

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