DIN 17182 Grade G8MnMo7-4 quenched and tempered (+QT)

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Description

In comparison to the unalloyed cast steel grades according to DIN 1681, the materials of this group show distinctly higher values of the notch impact energy. As a result of their low carbon content (0.23 per cent maximum), they are well suitable for welding. The material G8MnMo7-4 is applied in welded composite constructions for greater wall thicknesses. Because of its ability for precipitation hardening, the desired properties can be adjusted to a large extent without taking the wall thickness into account. The material possesses an extremely low carbon equivalent and, therefore, is still weldable without preheating and subsequent heat treatment with greater wall thicknesses, too. G8MnMo7-4, which shows high fatigue strength, is comparable with the fine-grain structural steel StE 355 or TSt E355. It is applied for big constructions in the offshore-area or in other building construction.

Related Standards

Equivalent Materials

Los datos sobre este material han sido proporcionados por WIAM.

A menos que se indique lo contrario, todas las medidas corresponden a condiciones de temperatura ambiente. A menos que se indique lo contrario, se utilizan las unidades del SI.
Las normas armonizadas son similares a uno o varios estándares del proveedor. Es posible que algunas normas armonizadas se ajusten al estándar original, mientras que otras pueden quedar fuera de su alcance.

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Propiedades

General

Property	Temperature	Value	Comment
Densidad	23.0 °C	7.8 - 7.9 g/cm³ Show Material materials with Densidad of 7.8 - 7.9 g/cm³	Typical for Molybdenum Steel

Mecánica

Property	Temperature	Value	Comment
Coeficiente de Poisson	23.0 °C	0.29 [-] Show Material materials with Coeficiente de Poisson of 0.29 [-]	Typical for Molybdenum Steel
Elongación	20.0 °C	22 % Show Material materials with Elongación of 22 %
Límite elástico	20.0 °C	350 MPa Show Material materials with Límite elástico of 350 MPa
Módulo elástico	23.0 °C	200 - 215 GPa Show Material materials with Módulo elástico of 200 - 215 GPa	Typical for Molybdenum Steel
Resistencia a la tracción	20.0 °C	500 - 650 MPa Show Material materials with Resistencia a la tracción of 500 - 650 MPa

Aplicaciones térmicas

Property	Temperature	Value	Comment
Calor específico	23.0 °C	456 J/(kg·K) Show Material materials with Calor específico of 456 J/(kg·K)	Typical for Molybdenum Steel
Coeficiente de dilatación térmica	23.0 °C	1.29E-5 1/K Show Material materials with Coeficiente de dilatación térmica of 1.29E-5 1/K	Typical for Molybdenum Steel
Conductividad térmica	23.0 °C	37 - 48 W/(m·K) Show Material materials with Conductividad térmica of 37 - 48 W/(m·K)	Typical for Molybdenum Steel
Temperatura de fusión		1382 - 1529 °C Show Material materials with Temperatura de fusión of 1382 - 1529 °C	Typical for Molybdenum Steel

Chemical properties

Property	Value
Azufre	0.015 % Show Material materials with Azufre of 0.015 %
Carbono	0.06 - 0.1 % Show Material materials with Carbono of 0.06 - 0.1 %
Cromo	0.2 % Show Material materials with Cromo of 0.2 %
Fósforo	0.02 % Show Material materials with Fósforo of 0.02 %
Manganeso	1.5 - 1.8 % Show Material materials with Manganeso of 1.5 - 1.8 %
Molibdeno	0.3 - 0.4 % Show Material materials with Molibdeno of 0.3 - 0.4 %
Niobio	0.05 % Show Material materials with Niobio of 0.05 %
Nitrógeno	0.02 % Show Material materials with Nitrógeno of 0.02 %
Silicona	0.6 % Show Material materials with Silicona of 0.6 %
Vanadio	0.1 % Show Material materials with Vanadio of 0.1 %