ASTM A240 304 Stainless Steel Sheet
High-quality 304 stainless steel sheet manufactured to ASTM A240 standards with various surface finishes to meet diverse industrial requirements.
Surface Treatments and Characteristics
| Surface Finish |
Characteristics and Applications |
| NO.2B |
Superior surface brightness and flatness compared to NO.2D. Enhanced mechanical properties through special surface treatment, suitable for comprehensive applications. |
| NO.1 |
Heat treatment and pickling finish after hot rolling process. |
| NO.4 |
Polished with #150-#180 grit abrasive belt, providing good 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, featuring continuous streaks. Primarily used for building ornaments, elevators, doors, and frontal plates. |
| BA |
Cold rolled, bright annealed and skin-passed finish with excellent brightness and mirror-like reflectivity. Ideal for kitchen apparatus and decorative applications. |
| 8K |
Premium brightness and superior mirror-like reflectivity for high-end applications. |
Chemical Composition
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%
Physical Properties
| Property |
Value |
Property |
Value |
| Tensile Strength σb (MPa) |
≥ 520 |
Specific Heat Capacity (0-100°C, KJ/kgK) |
0.50 |
| Yield Strength σ0.2 (MPa) |
≥ 205 |
Thermal Conductivity (W/m·K) |
16.3 (100°C), 21.5 (500°C) |
| Elongation δ5 (%) |
≥ 40 |
Linear Expansion Coefficient (10⁻⁶/K) |
17.2 (0-100°C), 18.4 (0-500°C) |
| Section Shrinkage ψ (%) |
≥ 60 |
Resistivity (20°C, 10⁻⁶ Ω·m) |
0.73 |
| Hardness |
≤ 187HB; ≤ 90HRB; ≤ 200HV |
Elastic Modulus (20°C, KN/mm²) |
193 |
| Melting Point (°C) |
1398 - 1454 |
Specific Heat Capacity |
0.50 |
Corrosion Resistance
Stainless steel 304 offers excellent resistance to corrosion and staining with low maintenance requirements and attractive appearance. The material is steam-cleanable and sterilizable without needing paint or surface finishes, making it ideal for demanding environments.
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
- Commercial kitchens and food processing plants
- Cookware, cutlery and household hardware
- Surgical instruments and medical equipment
- Major appliances and industrial equipment
- Automotive and construction materials
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