EN 1.4404 Stainless Steel (X2CrNiMo17-12-2)
Material EN 1.4404 (Stainless Steel , therefore, the weldability and corrosion resistance of 1.4404 stainless steel are better than 1.4401. The chemical composition of materials 1.4404 and 1.4401 contains molybdenum (Mo), while EN 1.4301 (X5CrNi18-10) and 1.4307 (X2CrNi18-9) do not. Molybdenum improves the heat resistance of steel and resists pitting and crevice corrosion in environments containing chlorides or other halides.
EN 1.4404 Material data sheet and specifications
The following tables and lists provide the data sheet of 1.4404 stainless steel, including chemical composition, physical properties and mechanical properties, etc.
Chemical composition
The chemical composition of the DIN EN 1.4404 material is listed in the following table.
| Chemical composition % | ||||||||||
| Standard | Steel name (steel number) | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Cr | No | Mo | N ≤ |
| EN 10088-1 | X2CrNiMo17-12-2 (1.4404) | 0.03 | 1.00 | 2:00 | 0.045 | 0.030 | 16.5-18.5 | 10.0-13.0 | 2:00-2:50 | 0.10 |
Physical properties
The physical properties of DIN 1.4404 material are given in the following lists, including density, thermal expansion, modulus of elasticity, thermal conductivity, specific heat capacity and electrical resistance.
Grades:
- 10 -6 ·K -1 = 10 -6 /K
- 1Ω mm²/m = 1 μΩ m
- 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
- 1 GPa = 1kN/mm2
- 1 MPa = 1 N/mm2
| Density (g/cm3) | 8.0 |
| Thermal conductivity at 20 °C (W/m·K) | 15 |
| Specific heat capacity in °C (J/(Kg·K)) | 500 |
| Electrical resistivity at 20 °C (μΩ m) | 0.75 |
| Magnetic | No |
| Modulus of elasticity | |
| Value, GP | Temperature, °C |
| 200 | 20 |
| 194 | 100 |
| 186 | 200 |
| 179 | 300 |
| 172 | 400 |
| 165 | 500 |
| Coefficient of thermal expansion, °C | |
| Value, 10 -6 /K | Temperature, °C |
| 16.0 | 20-100 |
| 16.5 | 20-200 |
| 17.0 | 20-300 |
| 17.5 | 20-400 |
| 18.0 | 20-500 |
Mechanical properties
The following table provides the mechanical properties of material 1.4404 in solution annealed condition for steel sheets, steel plates and steel strips.
| Standard | Steel grade (steel number) | Product condition | Thickness (mm), ≤ | 0.2% yield strength (Mpa), (transverse) | 1% yield strength (Mpa), (transverse) | Tensile strength (MPa) | Elongation (%), <3mm thick | % elongation, ≥ 4 mm thick | Impact energy (J) KV2 > 10mm thick (longitudinal) |
Impact energy (J) KV2 > 10mm thick (transverse) |
| EN 10088-2 | X2CrNiMo17-12-2 (1.4404) | cold rolled strip | 8 | ≥240 | ≥270 | 530-680 | ≥40 | ≥40 | – | – |
| hot rolled strip | 13.5 | ≥220 | ≥260 | 530-680 | ≥40 | ≥40 | 100 | 60 | ||
| hot rolled board | 75 | ≥220 | ≥260 | 520-670 | ≥45 | ≥45 | 100 | 60 |
The following table presents the mechanical properties of 1.4404 steel in the solution annealed condition for semi-finished products, bars, rebars, wires, profiles and bright products.
| Mechanical properties (solution annealed) | ||||||||
| Standard | Steel grade (steel number) | Diameter (d) or Thickness | ||||||
