SEW 520 Grade G12MnMo7-4 quenched and tempered (+QT)
SEW 520 Grade G12MnMo7-4 quenched and tempered (+QT) introduction
For the material G12MnMo7-4, which is suitable for great wall thicknesses, the desired properties can be adjusted to a large extent without taking the wall thickness into account because of the materials capability of precipitation hardening. The material possesses an outstandingly low carbon equivalent and, therefore, is still weldable without preheating and subsequent heat treatment with greater wall thicknesses, too. With its mechanical properties and its weldability, G12MnMo7-4 corresponds to the rolled or forged fine-grain structural steels StE 460c and StE 500 and, therefore, presents itself as a good choice for high-strength welded constructions.
In addition to high values for the 0.2% proof strength, the material distinguishes itself by relatively high values of the notch impact energy at the same time.
Applcation:
is chiefly applied in the mechanical engineering and the vehicle manufacturing, furthermore in the plant engineering and crane construction, in the offshore-technology as well as in the underground mining at climatically determined temperatures.
Equivalent material: DIN 1.5431, EN G12MnMo7-4, EN 1.5431
SEW 520 Grade G12MnMo7-4 quenched and tempered (+QT) general
| Property |
Temperature |
Value |
Comment |
| Density |
23.0 °C |
Density of 7.8 - 7.9 g/cm³ |
Typical for Molybdenum Steel |
SEW 520 Grade G12MnMo7-4 quenched and tempered (+QT) thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
23.0 °C |
Coefficient of thermal expansion of 1.29E-5 1/K |
Typical for Molybdenum Steel |
| Melting point |
- |
Melting point of 1382 - 1529 °C |
Typical for Molybdenum Steel |
| Specific heat capacity |
23.0 °C |
Specific heat capacity of 456 J/(kg·K) |
Typical for Molybdenum Steel |
| Thermal conductivity |
23.0 °C |
Thermal conductivity of 37 - 48 W/(m·K) |
Typical for Molybdenum Steel |
SEW 520 Grade G12MnMo7-4 quenched and tempered (+QT) chemical
| Property |
Value |
| Carbon |
Carbon of 0.08 - 0.15 % |
| Chromium |
Chromium of 0.2 % |
| Manganese |
Manganese of 1.5 - 1.8 % |
| Molybdenum |
Molybdenum of 0.3 - 0.4 % |
| Niobium |
Niobium of 0.05 % |
| Nitrogen |
Nitrogen of 0.02 % |
| Phosphorus |
Phosphorus of 0.02 % |
| Silicon |
Silicon of 0.6 % |
| Sulfur |
Sulfur of 0.015 % |
| Vanadium |
Vanadium of 0.1 % |
SEW 520 Grade G12MnMo7-4 quenched and tempered (+QT) mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
23.0 °C |
Elastic modulus of 200 - 215 GPa |
Typical for Molybdenum Steel |
| Elongation |
20.0 °C |
Elongation of 16 % |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.29 [-] |
Typical for Molybdenum Steel |
| Tensile strength |
20.0 °C |
Tensile strength of 600 - 750 MPa |
- |
| Yield strength |
20.0 °C |
Yield strength of 500 MPa |
- |
From sourcing to delivery, we are your trusted partner, offering comprehensive steel solutions tailored to your requirements.
-- Our promise
Get a quote