EN 10090 X45CrSi9-3 Quenched & Tempered (QT) – High-Performance Valve Steel
X45CrSi9-3 is a martensitic Cr-Si-alloyed valve steel. The steel shows excellent nitriding and surface hardenability, it is suitable for upsetting. Moderate resistance in exhaust condensate. This applies also to lead compounds at increased temperatures. Tempering resistance at continuous operation up to approx. 700 deg. Use: inlet valves, shanks, valves
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 7.7 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 20.0 °C | 210 GPa | |
Elongation | 20.0 °C | 14 % | |
Hardness, Brinell | 20.0 °C | 266 - 325 [-] | |
Poisson's ratio | 23.0 °C | 0.3 [-] | Typical for Martensitic Stainless Steel |
Reduction of area | 20.0 °C | 40 % | |
Shear modulus | 23.0 °C | 77 GPa | Typical for Martensitic Stainless Steel |
Tensile strength | 20.0 °C | 900 - 1100 MPa | |
500.0 °C | 500 MPa | ||
550.0 °C | 360 MPa | ||
600.0 °C | 250 MPa | ||
650.0 °C | 170 MPa | ||
700.0 °C | 110 MPa | ||
Yield strength Rp0.2 | 20.0 °C | 700 MPa | |
500.0 °C | 400 MPa | ||
550.0 °C | 300 MPa | ||
600.0 °C | 240 MPa | ||
650.0 °C | 120 MPa | ||
700.0 °C | 80 MPa | ||
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 100.0 °C | 1.09E-5 1/K | |
300.0 °C | 1.12E-5 1/K | ||
500.0 °C | 1.15E-5 1/K | ||
700.0 °C | 1.18E-5 1/K | ||
Melting point | 1370 - 1530 °C | Typical for Martensitic Stainless Steel | |
Specific heat capacity | 20.0 °C | 500 J/(kg·K) | |
Thermal conductivity | 20.0 °C | 21 W/(m·K) | |
Electrical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Electrical resistivity | 23.0 °C | 6E-7 Ω·m | Typical for Martensitic Stainless Steel |
Chemical properties
| Property | Value |
|---|---|
Carbon | 0.4 - 0.5 % |
Chromium | 8 - 10 % |
Manganese | 0.6 % |
Nickel | 0.5 % |
Phosphorus | 0.04 % |
Silicon | 2.7 - 3.3 % |
Sulfur | 0.03 % |
Metal
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