Grade A193 B8MA Class 1A
USA UNS S31600
Other Names
Corresponding Standard ASTM A193/A193M-2020
Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications
Classification Austenitic Stainless Steel
Properties Strength Corrosion Resistance Low-Temperature Toughness Forgability Weldability
A193 B8MA Class 1A Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo
Minimum Value - - - - - 16 10 2
Maximum Value 0.08 1 2 0.045 0.03 18 14 3
• The intentional addition of Bi, Se, Te, and Pb is not permitted
A193 B8MA Class 1A Mechanical Properties
diameter
d
mm
Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
Hardness
HBW
All Sizes Solution Heat Treatment in Finished Condition ≥515 ≥205 ≥30 ≥50 ≤192
• d-diameter of bolt, screw, studs, double-end studs, bars and wire.
1 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO Numerical Grade DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade SS BS EN/BS
06Cr17Ni12Mo2 S31608 316 SUS 316 STS 316 316 S31600 X5CrNiMo 17-12-2 4401-316-00-I X5CrNiMo 17-12-2
(X5CrNiMo 18-10)
X5CrNiMo 17-13-3
(X5CrNiMo 18-12)
1.4401
1.4401
1.4436
1.4436
Z6CND 17-11
Z6CND 17-12
X5CrNiMo 17-12-2
X3CrNiMo 17-13-3
1.4401
1.4436
2347
2343
316S16
316S31
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 UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr17Ni12Mo2
(0Cr17Ni12Mo2)
0Cr18Ni12Mo2Ti
S31608 316 SUS 316 STS 316 316 S31600 X5CrNiMo 17-12-2 X5CrNiMo 17-12-2
(X5CrNiMo 18-10)
X5CrNiMo 17-13-3
(X5CrNiMo 18-12)
1.4401
1.4401
1.4436
1.4436
Z6CND 17-11
Z6CND 17-12
X5CrNiMo 17-12-2
X3CrNiMo 17-13-3
1.4401
1.4436
08Х17Н13М2Т 2347
2343
316S16
316S31
3 Approximate Comparison Table
China Japan United States International Organization for Standardization European Standard
ISC JIS UNS ISO Numerical Grade Numerical Grade
S31608 SUS316 S31600 X3CrNiMo17-12-3 4436-316-00-I 1.4436
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
06Cr17Ni12Mo2
(0Cr17Ni12Mo2)
S31608 SUS316 316 S31600 X5CrNiMo17-12-2 4401-316-00-I X5CrNiMo17-12-2 1.4401
5 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
06Cr17Ni12Mo2
(0Cr17Ni12Mo2)
S31608 SUS316 316 S31600 X3CrNiMo17-12-3 4436-316-00-I X3CrNiMo17-12-3 1.4436
A193B8MAClass1A Corresponding Standards(Same grade name, different standards)

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