Stainless Steel 304L
Material Data Sheet
Type 304L stainless steel is an extra-low carbon version of the 304 steel alloy. The lower carbon content in 304L minimizes deleterious or harmful carbide precipitation as a result of welding. 304L can, therefore, be used “as welded” in severe corrosion environments, and it eliminates the need for annealing.
This grade has slightly lower mechanical properties than the standard 304 grade but is still widely used thanks to its versatility. Like Type 304 stainless steel, it’s commonly used in beer-brewing and wine-making, but also for purposes beyond the food industry such as in chemical containers, mining, and construction. It is ideal for use in metal parts such as nuts and bolts that are exposed to saltwater.
| Element | Content(%) |
|---|---|
| Iron, Fe | Balance |
| Chromium, Cr | 18.00 – 20.00 |
| Nickel, Ni | 8.00 – 12.00 |
| Manganese, Mn | ≤2.00 |
| Silicon, Si | ≤0.75 |
| Nitrogen, N | ≤0.10 |
| Carbon, C | ≤0.03 |
| Phosphorus, P | ≤0.045 |
| Sulfur, S | ≤0.03 |
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.03 g/cm3 | 0.289 lbs/in3 |
| Melting Point | 1400 – 1455 °C | 2550 – 2650 °F |
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Knoop | 158 | 158 |
| Hardness, Rockwell B | 82 | 82 |
| Hardness, Vickers | 159 | 159 |
| Tensile Strength, Ultimate | 564 MPa | 81800 psi |
| Tensile Strength, Yield | 210 MPa | 30500 psi |
| Elongation at Break | 58% | 58% |
| Modulus of Elasticity | 193 – 200 GPa | 28000 -29000 ksi |
| Charpy Impact | 216 J | 159 ft/lb |
| Properties | Metric | Imperial |
|---|---|---|
| Specific Heat Capacity | 0.5 J/g-°C | 0.12 BTU/lb-°F |
| Thermal Conductivity | 16.2 W/m-K | 112 BTU-in/hr-ft²-°F |
Stainless Steel 304L is used in the following application areas:
- Aerospace structures
- Base plates
- Food and beverage industry
- Pressure containing applications
- Architectural structures and design features, moldings and trims
- Sanitary or cryogenic applications
- Chemical industry processing equipment
Key Words: aisi304, aisi 304, T304, T 304, SUS304, SS304, 304SS, 304 SS, T304L, T304 L, 304L, 304 L, UNS S30403, AMS 5647, QQ-S-763, austenitic, Cr-Ni stainless steel, SAE 30304L, DIN 1.4306, X2CrNi189, B.S. 304 S 12, PN 86020 (Poland), OOH18N10, ISO 4954 X2CrNi1810E, ISO 683/13 10, 18-8
