UNS: S30403
EN-DIN: 1.4306
Printable PDF: 304L Stainless Steel Alloy
Industries supplied include: Process equipment in mining, chemical, cryogenic, food, dairy, and pharmaceutical industries. 304 grade stainless has excellent welding and formability characteristics and is one of the most utilized stainless steels. 304L is an extra low carbon grade with a 0.03% max carbon content that eliminates carbide precipitation due to welding.
Nominal Composition
| C: | 0.030 max |
| Mn: | 2.0 max |
| P: | 0.045 max |
| S: | 0.030 max |
| Si: | 0.75 max |
| Cr: | 17.5 – 19.5 |
| Ni: | 8.0 – 12.0 |
| N: | 0.10 max |
| Fe: | BAL |
Physical Properties
At 70°F (At 20°C)
Density
0.29 lb./in³ / (8.03 g/cm³)
Modulus of Elasticity (E)
28.0 x 10³ ksi / (193 x 10³MPa)
Coefficient of Expansion
9.4 x 10-6 microinches/in.-°F (70-600°F) / (16.9 μm/m-°C) (20-300°C)
Electrical Resistivity
28.4 μ ohm.in / (72 μ ohm.cm)
Thermal Conductivity
9.4 Btu-in./ft.2hr.-°F / (16.2 W/m-K)
Applicable Specifications
AMS 5513, ASTM A313, ASTM A240, ASTM A580, ASTM A 666, AMS 5511
Typical Mechanical Properties – Typical Room Temperature Mechanical Properties
Typical mechanical properties are based on AK source, ASTM A240
Condition
Annealed
Tensile Strength (UTS)
95 ksi (655 MPa)
0.2% YS
40 ksi (276 MPa)
Elongation% in 2” Min (50.8 mm)
55%
Hardness Rockwell
82 HRBW
*Tempered Properties available upon request*
