Stainless Steel 304
Material Data Sheet
Type 304 is the most widely used austenitic stainless steel. It is also known as “18/8” stainless steel because of its composition, which includes 18% chromium and 8% nickel. Type 304 stainless steel has good forming and welding properties as well as strong corrosion resistance and strength.
This kind of stainless steel also has good drawability. It can be formed into a variety of shapes and, in contrast to type 302 stainless, can be used without annealing, the heat treatment that softens metals.
| Element | Content(%) |
|---|---|
| Iron, Fe | 71.00 |
| Chromium, Cr | 19.00 |
| Nickel, Ni | 9.00 |
| Manganese, Mn | ≤2.00 |
| Silicon, Si | ≤0.75 |
| Carbon, C | ≤0.080 |
| 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, Brinell | 123 | 123 |
| Hardness, Knoop | 138 | 138 |
| Hardness, Rockwell B | 70 | 70 |
| Hardness, Vickers | 129 | 129 |
| Tensile Strength, Ultimate | 505 MPa | 73200 psi |
| Tensile Strength, Yield | 215 MPa | 31200 psi |
| Elongation at Break | 70% | 70% |
| Modulus of Elasticity | 193 GPa | 28000 ksi |
| Poisson’s Ratio | 0.29 | 0.29 |
| Charpy Impact | 325 J | 240 ft/lb |
| Shear Modulus | 86 GPa | 12500 ksi |
| Properties | Metric | Imperial |
|---|---|---|
| CTE, linear 20°C | 17.3 µm/m-°C | 9.61 µin/in-°F |
| 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 304 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, UNS S30400, AMS 5501, AMS 5513, AMS 5560, AMS 5565, AMS 5566, AMS 5567, AMS 5639, AMS 5697, ASME SA182, ASME SA194 (8), ASME SA213, ASME SA240, ASME SA249, ASME SA312, ASME SA320 (B8), ASME SA358, ASME SA376, ASME SA403, ASME SA409, ASME SA430, ASME SA479, ASME SA688, ASTM A167, ASTM A182, ASTM A193, ASTM A194, ASTM A666, FED QQ-S-763, MILSPEC MIL-S-5059, SAE 30304, DIN 1.4301, X5CrNi189, B.S. 304 S 15, EN 58E, PN 86020 (Poland), OH18N9, ISO 4954 X5CrNi189E, ISO 683/13 11, 18-8
