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Grade A193 B8 Class 1
USA UNS S30400
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 B8 Class 1 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni
Minimum Value - - - - - 18 8
Maximum Value 0.08 1 2 0.045 0.03 20 11
Note: The intentional addition of Bi, Se, Te, and Pb is not permitted.
A193 B8 Class 1 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 Solid Solution Treatment ≥515 ≥205 ≥30 ≥50 ≤223
New and Old Grade Replacement List
Corresponding Standard Grade
ASTM A193/A193M-2001
Grade
USA UNS
Other Name
ASTM A193/A193M-2019
Grade
USA UNS
Other Name
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
06Cr19Ni9 S30408 304 SUS 304 STS 304 304 S30400 X5CrNi 18-10 4301-304-00-I X5CrNi 18-10
(X5CrNi 18-9) 		1.4301 Z6CN 18-09 X5CrNi 18-10 1.4301 08Х18Н10 2332
2333 		304S15
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
06Cr19Ni10
(0Cr18Ni9) 		S30408 304 SUS 304 STS 304 304 S30400 X5CrNi 18-10 X5CrNi 18-10
(X5CrNi 18-9) 		1.4301 Z6CN 18-09 X5CrNi 18-10 1.4301 08Х18Н10 2332
2333 		304S15
3 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
06Cr19Ni10
(0Cr18Ni9) 		S30408 SUS304 304 S30400 X5CrNi18-10 4301-304-00-I X5CrNi18-10 1.4301
A193B8Class1 Corresponding Standards(Same grade name, different standards)
1 ASTM A193/A193M-2001
A193 B8 Class 1 S30400 304
2 ASTM A193/A193M-2019
A193 B8 Class 1 S30400 304
3 ASTM A193/A193M-2020
A193 B8 Class 1 S30400 304

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