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304L stainless steel is a low-carbon version of the popular 304 grade, designed specifically to enhance weldability and corrosion resistance without requiring post-weld annealing. With a composition of 18% chromium and 8% nickel, 304L is highly valued for its superior corrosion resistance, especially in applications exposed to harsh environmental conditions. As a versatile alloy, Solitaire Steel & Engineering LLP, based in Khetwadi, Mumbai, India, supplies 304L stainless steel across multiple industries, including food processing, construction, and chemical processing.
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| Element | Content (%) |
|---|---|
| Iron (Fe) | Balance |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 12.0 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Carbon (C) | ≤ 0.03 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Nitrogen (N) | ≤ 0.10 |
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.0 g/cm³ | 0.29 lb/in³ |
| Modulus of Elasticity | 193 GPa | 28,000 ksi |
| Thermal Expansion | 17.2 µm/m°C | 9.6 µin/in°F |
| Melting Range | 1399 – 1454 °C | 2550 – 2650 °F |
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 485 – 620 MPa | 70,000 – 90,000 psi |
| Yield Strength | 170 MPa | 25,000 psi |
| Elongation at Break | 40% | 40% |
| Hardness (Rockwell B) | ≤ 92 HRB | ≤ 92 HRB |
| Property | Metric | Imperial |
|---|---|---|
| Electrical Resistivity | 0.72 µΩ·m | 28.3 µΩ·in |
| Property | Metric | Imperial |
|---|---|---|
| Thermal Conductivity (100°C) | 16.2 W/m·K | 9.4 BTU/hr·ft·°F |
| Specific Heat Capacity | 0.5 J/g·K | 0.12 BTU/lb·°F |
| Coefficient of Thermal Expansion | 17.2 µm/m°C | 9.6 µin/in·°F |
| Product Type | Standards | Sizes | Types | Applications |
|---|---|---|---|---|
| Sheets & Plates | ASTM A240, ASME SA240 | Thickness: 0.3mm – 150mm, Width: up to 2000mm | Hot Rolled, Cold Rolled | Food processing equipment, chemical storage tanks |
| Pipes & Tubes | ASTM A312, ASTM A269 | Diameter: 6mm – 1200mm | Seamless, Welded | Plumbing, heat exchangers, structural applications |
| Bars | ASTM A276, ASTM A479 | Diameter: up to 100mm | Round, Square, Hex | Fasteners, mechanical components |
| Angles, Channels, Beams | ASTM A484, EN 10088-3 | Custom sizes available | L-Angles, U-Channels, I-Beams | Architectural frameworks, supports |
| Fittings | ASTM A403 | Size: 1/2″ – 72″ | Buttweld, Socket Weld | Chemical, petrochemical industries |
304L stainless steel is valued for its corrosion resistance, especially after welding. Typical applications include:
While 304 and 304L are similar, 304L’s low carbon content provides better resistance to intergranular corrosion following welding. This makes 304L more suitable for structures that cannot undergo heat treatment, such as those in food processing, chemical industries, and marine environments. However, where higher mechanical strength is critical, standard 304 is preferred.
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