ASTM A240 304 stainless steel sheet with various surface treatments for comprehensive industrial applications.
| Surface Finish | Characteristics and Application |
|---|---|
| NO.2B | Superior brightness and flatness compared to NO.2D, with enhanced mechanical properties for comprehensive uses |
| NO.1 | Heat treatment and pickling finish after hot rolling process |
| NO.4 | Polished with #150-#180 grit abrasive belt, featuring good brightness with discontinuous coarse striations. Used for bathtubs, building ornaments, electrical appliances, kitchen utensils, and food processing equipment |
| HL | Polished with #150-#320 grit on NO.4 finish, featuring continuous streaks. Ideal for building ornaments, elevators, doors, and frontal plates |
| BA | Cold rolled, bright annealed and skin-passed with excellent mirror-like brightness and reflexivity. Suitable for kitchen apparatus and decorative applications |
| 8K | Excellent brightness and superior mirror-like reflexivity |
C: ≤0.08%, Si: ≤1.0%, Mn: ≤2.0%, Cr: 18.0-20.0%, Ni: 8.0-10.0%, S: ≤0.03%, P: ≤0.045%
| Property | Value |
|---|---|
| Tensile Strength σb (MPa) | ≥ 520 |
| Yield Strength σ0.2 (MPa) | ≥ 205 |
| Elongation δ5 (%) | ≥ 40 |
| Section Shrinkage ψ (%) | ≥ 60 |
| Hardness | ≤ 187HB; ≤ 90HRB; ≤ 200HV |
| Melting Point (°C) | 1398 - 1454 |
| Specific Heat Capacity (0-100°C, KJ/kgK) | 0.50 |
| Thermal Conductivity (W/m·K) | 16.3 (100°C), 21.5 (500°C) |
| Linear Expansion Coefficient | 17.2 (0-100°C), 18.4 (0-500°C) |
| Resistivity (20°C, 10⁻⁶ Ω·m) | 0.73 |
| Longitudinal Elastic Modulus (20°C, KN/mm²) | 193 |
304 stainless steel offers excellent resistance to corrosion and staining with low maintenance requirements and attractive luster. The alloy is ideal for applications requiring steam-cleaning and sterilization without needing paint or surface finishes.