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Grade A193 B8M Class 2
USA UNS S31600
Other Names
Corresponding Standard ASTM A193/A193M-2001
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Servise
Classification Austenitic Stainless Steel
Properties Strength Corrosion Resistance Low-Temperature Toughness Forgability Weldability
A193 B8M Class 2 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
Note: The intentional addition of Bi, Se, Te, and Pb is not permitted.
A193 B8M Class 2 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
d≤M20 Carbide Solution Treatment + Strain Hardening ≥760 ≥665 ≥15 ≥45 ≤321
M20＜d≤M24 Carbide Solution Treatment + Strain Hardening ≥690 ≥550 ≥20 ≥45 ≤321
M24＜d≤M30 Carbide Solution Treatment + Strain Hardening ≥655 ≥450 ≥25 ≥45 ≤321
M30＜d≤M36 Carbide Solution Treatment + Strain Hardening ≥620 ≥345 ≥30 ≥45 ≤321
1 Approximate Comparison Table Austenitic Stainless Steel
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 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
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 Austenitic Stainless Steel
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
A193B8MClass2 Corresponding Standards(Same grade name, different standards)
1 ASTM A193/A193M-2001
A193 B8M Class 2 S31600 316
2 ASTM A193/A193M-2019
A193 B8M Class 2 S31600 316
3 ASTM A193/A193M-2020
A193 B8M Class 2 S31600 316

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