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| Material designation | A193 B8 Class 1 | 
| UNS | S30400 | 
| Other names | 304 | 
| Correspondence standard | ASTM A193/A193M-2001 Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Servise | 
| Sort out | Austenitic stainless steel | 
| Property | Strength Corrosion resistance Low temperature toughness forging weldability | 
| Tag | Austenitic stainless steel | 
 
 
A193 B8 Class 1 Chemical Element Content (%)
| Ingredient | C | Si | Mn | P | S | Cr | Ni | 
| Minimum value | - | - | - | - | - | 18 | 8 | 
| Maximum value | 0.08 | 1 | 2 | 0.045 | 0.03 | 20 | 11 | 
A193 B8 Class 1 Mechanical properties
| Diameter d mm | Heat treatment or condition | Tensile strength σb Mpa | Yield point σs Mpa | Elongation or elongation after breaking δ % | Shrinkage of section ψ % | Hardness HBW | 
| All sizes | Carbide solution treatment | ≥515 | ≥205 | ≥30 | ≥50 | ≤223 | 
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