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Grade A193 B8MLNA Class 1A
USA UNS S31653
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 Corrosion Resistance
A193 B8MLNA Class 1A Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo N
Minimum Value - - - - - 16 10 2 0.1
Maximum Value 0.03 1 2 0.045 0.03 18 13 3 0.16
Note: The intentional addition of Bi, Se, Te, and Pb is not permitted.
A193 B8MLNA 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 Carbide Solution Treatment in Finished Condition ≥515 ≥205 ≥30 ≥50 ≤192
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 DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade SS BS EN/BS
022Cr17Ni12Mo2N
(00Cr17Ni13Mo2N) 		S31653 316LN SUS 316LN STS 316LN 316LN S31653 X2CrNiMoN 17-12-2
X2CrNiMoN 17-11-2 		X2CrNiMoN 17-13-3
(X2CrNiMoN 18-13) 		1.4429 Z2CND 17-13Az
Z3CND 17-12Az 		X2CrNiMoN 17-13-3
X2CrNiMoN 17-12-2 		1.4429
1.4406 		2375 316S63
316S61
2 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
022Cr17Ni12Mo2N
(00Cr17Ni13Mo2N) 		S31653 SUS316LN 316LN S31653 X2CrNiMoN17-12-3 4429-316-53-I X2CrNiMoN17-12-3 1.4429
A193B8MLNAClass1A Corresponding Standards(Same grade name, different standards)
1 ASTM A193/A193M-2001
A193 B8MLNA Class 1A S31653
2 ASTM A193/A193M-2019
A193 B8MLNA Class 1A S31653
3 ASTM A193/A193M-2020
A193 B8MLNA Class 1A S31653

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