304 304L Stainless Steel Coil Strip Cold Rolled S30400 S30403
304 304L Cold Rolled Stainless Steel Coil Mechanical Property ASTM A240: Tensile strength: > 515 Mpa; Yield Strength: >205 Mpa; Elongation(%): > 40%. Type 304 (S30400), Type 304L (S30403) in Coil Form ... Type 304/304L is the modern version of “18-8” stainless steel containing approximately 18% chromium. Type 304 stainless steel is the most common austenitic chromium-nickel stainless steel. ... The now coil is transferred to a cold rolling mill.
Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM A240 and ASME SA240*
| Element | 304 | 304L |
| Carbon | 0.07 | 0.03 max |
| Chromium | 17.5-19.5 | 17.5-19.5 |
| Nickel | 8.0-10.5 | 8.0-12.0 |
| Manganese | 2.00 | 2.00 |
| Silicon | 0.75 | 0.75 |
| Nitrogen | 0.10 | 0.10 |
| Phosphorus | 0.045 | 0.045 |
| Sulfur | 0.030 | 0.030 |
Mechanical Properties
Mechanical property requirements for annealed product as specified in ASTM A240 and ASME SA240
| Property | 304 | 304L |
| Yield Strength, min. (ksi) | 30 | 25 |
| Tensile Strength, min. (ksi) | 75 | 70 |
| Elongation, min. (%) | 40 | 40 |
| Hardness, max. (Rb) | 92 | 92 |
Physical Properties
Physical properties for Type 304/304L stainless steel
| Property | 304/304LData |
| Density, lb/in3 | 0.285 |
| Modulus of Elasticity, psi | 28 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 9.2 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 9.4 |
| Specific Heat, Btu/lb ˚F | 0.12 |
| Electrical Resistivity, Microohm-in | 28.3 |
Standards
Typical standards for Type 304/304L stainless steel
| 304 | 304L |
| ASTM A240 | ASTM A240 |
| ASTM A666 | ASTM A666 |
| ASME SA240 | ASME SA240 |
| AMS 5513 | AMS 5511 |
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