Compare / 1.4401 vs 1.4571
1.4401 vs 1.4571
EN 10088-2/-3/-4/-5 · Stainless steel
Molybdenum austenitic (316): for coastal and de-icing salt exposure, fy 220 MPa plate.
EN 10088-2/-3/-4/-5 · Stainless steel
Titanium-stabilised 316 (Ti 5×C to 0.7 %); largely replaced by 1.4404.
Mechanical
| Property | Condition | 1.4401 | 1.4571 | Difference |
|---|---|---|---|---|
| 0.2 % proof strength Rp0.2 | t = 8 mm · cold rolled strip | ≥ 240MPa1 | ≥ 240MPa1 | same |
| t = 13.5 mm · hot rolled strip | ≥ 220MPa1 | ≥ 220MPa1 | same | |
| t = 75 mm · hot rolled plate | ≥ 220MPa2 | ≥ 220MPa2 | same | |
| t = 250 mm · bars, rods and sections | ≥ 200MPa1 | ≥ 200MPa1 | same | |
| Tensile strength Rm | t = 8 mm · cold rolled strip | ≥ 530MPa1 | ≥ 540MPa1 | +1.9 % |
| t = 13.5 mm · hot rolled strip | ≥ 530MPa1 | ≥ 540MPa1 | +1.9 % | |
| t = 75 mm · hot rolled plate | ≥ 520MPa2 | ≥ 520MPa2 | same | |
| t = 250 mm · bars, rods and sections | ≥ 500MPa1 | ≥ 500MPa1 | same | |
| Elongation after fracture A | t = 75 mm · hot rolled plate | ≥ 45%1 | ≥ 40%1 | −11 % |
| Modulus of elasticity E | — | 200 000MPa1 | 200 000MPa1 | same |
| Shear modulus G | — | 76 900MPa1 | 76 900MPa1 | same |
| Poisson's ratio ν | — | 0.31 | 0.31 | same |
Design values
| Property | Condition | 1.4401 | 1.4571 | Difference |
|---|---|---|---|---|
| Partial factor for the material γM | cross-sections, γM0 | 1.11 | 1.11 | same |
| member instability, γM1 | 1.11 | 1.11 | same | |
| tension to fracture, bolts, welds, γM2 | 1.251 | 1.251 | same |
Physical
| Property | Condition | 1.4401 | 1.4571 | Difference |
|---|---|---|---|---|
| Density ρ | — | 8 000kg/m³1 | 8 000kg/m³1 | same |
Thermal
| Property | Condition | 1.4401 | 1.4571 | Difference |
|---|---|---|---|---|
| Coefficient of thermal expansion α | 20–100 °C | 16×10⁻⁶ /K1 | 16.5×10⁻⁶ /K1 | +3.1 % |
| Specific heat capacity cp | at +20 °C | 500J/(kg·K)1 | 500J/(kg·K)1 | same |
| Thermal conductivity λ | at +20 °C | 15W/(m·K)1 | 15W/(m·K)1 | same |
Chemical and durability
| Property | Condition | 1.4401 | 1.4571 | Difference |
|---|---|---|---|---|
| Corrosion resistance class CRC | — | III1 | III1 |
Fire
| Property | Condition | 1.4401 | 1.4571 | Difference |
|---|---|---|---|---|
| 0.2 % proof strength reduction factor in fire kp0.2,θ | at +20 °C | 11 | 11 | same |
| at +100 °C | 0.861 | 0.891 | +3.5 % | |
| at +200 °C | 0.721 | 0.821 | +14 % | |
| at +300 °C | 0.671 | 0.771 | +15 % | |
| at +400 °C | 0.621 | 0.721 | +16 % | |
| at +500 °C | 0.61 | 0.691 | +15 % | |
| at +600 °C | 0.561 | 0.651 | +16 % | |
| at +700 °C | 0.51 | 0.591 | +18 % | |
| at +800 °C | 0.411 | 0.511 | +24 % | |
| at +900 °C | 0.221 | 0.291 | +32 % | |
| at +1000 °C | 0.141 | 0.151 | +7.1 % | |
| at +1100 °C | 0.071 | — | ||
| Elastic modulus reduction factor kE,θ | at +20 °C | 11 | 11 | same |
| at +100 °C | 0.961 | 0.961 | same | |
| at +200 °C | 0.921 | 0.921 | same | |
| at +300 °C | 0.881 | 0.881 | same | |
| at +400 °C | 0.841 | 0.841 | same | |
| at +500 °C | 0.81 | 0.81 | same | |
| at +600 °C | 0.761 | 0.761 | same | |
| at +700 °C | 0.711 | 0.711 | same | |
| at +800 °C | 0.631 | 0.631 | same | |
| at +900 °C | 0.451 | 0.451 | same | |
| at +1000 °C | 0.21 | 0.21 | same | |
| at +1100 °C | 0.11 | — | ||
| Ultimate strength reduction factor ku,θ | at +20 °C | 11 | 11 | same |
| at +100 °C | 0.871 | 0.881 | +1.1 % | |
| at +200 °C | 0.81 | 0.811 | +1.3 % | |
| at +300 °C | 0.781 | 0.791 | +1.3 % | |
| at +400 °C | 0.771 | 0.791 | +2.6 % | |
| at +500 °C | 0.741 | 0.771 | +4.1 % | |
| at +600 °C | 0.671 | 0.711 | +6.0 % | |
| at +700 °C | 0.511 | 0.571 | +12 % | |
| at +800 °C | 0.341 | 0.381 | +12 % | |
| at +900 °C | 0.191 | 0.231 | +21 % | |
| at +1000 °C | 0.11 | 0.11 | same | |
| at +1100 °C | 0.071 | — |
Rows are matched by condition (thickness band, temperature, product form). A dash means the grade has no sourced value for that condition. Differences are 1.4571 relative to 1.4401; for ranges the lower bound is compared.