304 Stainless Steel Metal Sheet
ASTM A240 304 stainless steel sheet available in various surface finishes including 2B, NO.1, NO.4, HL, BA, and 8K mirror finishes.
Surface Treatments & Characteristics
| Surface Finish |
Characteristics and Applications |
| NO.2B |
Superior brightness and flatness compared to NO.2D. Enhanced mechanical properties through special surface treatment for comprehensive applications. |
| NO.1 |
Heat treatment and pickling finish after hot rolling process. |
| NO.4 |
Polished with #150-#180 grit abrasive belt. Features better brightness with discontinuous coarse striations. Used for bathtubs, building ornaments, appliances, kitchen utensils, and food processing equipment. |
| HL |
Polished with #150-#320 grit abrasive belt on NO.4 finish with continuous streaks. Ideal for building ornaments, elevators, doors, and frontal plates. |
| BA |
Cold rolled, bright annealed, and skin-passed. Excellent brightness and mirror-like reflectivity for kitchen apparatus and decorative applications. |
| 8K |
Excellent brightness and superior mirror-like reflectivity. |
Chemical Composition
Carbon (C): ≤0.08% | Silicon (Si): ≤1.0% | Manganese (Mn): ≤2.0%
Chromium (Cr): 18.0-20.0% | Nickel (Ni): 8.0-10.0%
Sulfur (S): ≤0.03% | Phosphorus (P): ≤0.045%
Physical Properties
| 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 |
Corrosion Resistance
Stainless steel's exceptional resistance to corrosion and staining, combined with low maintenance requirements and attractive luster, makes it ideal for numerous applications. This alloy is widely used in cookware, cutlery, household hardware, surgical instruments, major appliances, industrial equipment, and automotive and construction components for large buildings. It is particularly suitable for commercial kitchens and food processing plants, as it can be steam-cleaned and sterilized without requiring paint or other surface finishes.
Applications
- Food preparation equipment, especially in chloride environments
- Chemical processing equipment
- Laboratory benches and equipment
- Rubber, plastics, pulp & paper machinery
- Pollution control equipment
- Boat fittings, valves and pump trim
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