Nitrodur 8515 QT

Nombres alternativos y comerciales
Nitrodur 8515, 1.8515, 31CrMo12
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Description

1.8515 (31CrMo12) is a nitriding steel and used in automotive and mechanical engineering for components needing high surface wear resistance and will be nitrated after the processing. Example: gear wheels, drills, connecting rods or shafts.

Related Standards

Equivalent Materials

Los datos sobre este material han sido proporcionados por Deutsche Edelstahlwerke Specialty Steel (DEW).

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

PropertyValue

Densidad

7.7 g/cm³

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Medidas

PropertyValueComment

Diámetro

250 mm

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max.

Mecánica

PropertyValueComment

Charpy impact energy, V-notch

25 - 30 J

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Dureza Brinell

248 [-]

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annealed

Elongación

10 - 12 %

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A5

Hardness, Vickers, 1

800 [-]

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nitrided

Límite elástico

675 - 835 MPa

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Módulo elástico

210 GPa

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Resistencia a la tracción

880 - 1230 MPa

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Aplicaciones térmicas

PropertyTemperatureValueComment

Calor específico

430 J/(kg·K)

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Coeficiente de dilatación térmica

100 °C

1.15e-05 1/K

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for 20°C to the mentioned temperature

200 °C

1.25e-05 1/K

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for 20°C to the mentioned temperature

300 °C

1.33e-05 1/K

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for 20°C to the mentioned temperature

400 °C

1.39e-05 1/K

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for 20°C to the mentioned temperature

Conductividad térmica

42 W/(m·K)

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Eléctrico

PropertyValue

Resistividad eléctrica

1.9e-07 Ω·m

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Chemical properties

PropertyValue

Azufre

0.035 %

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Carbono

0.28 - 0.35 %

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Cromo

2.8 - 3.3 %

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Fósforo

0.025 %

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Hierro

Balance

Manganeso

0.4 - 0.7 %

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Molibdeno

0.3 - 0.5 %

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Silicona

0.4 %

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Technological properties

Property
Application areas

It is used in Automotive and Mechanical engineering for components such as gear wheels, drills, connecting rods or shafts.

Heat Treatment

Soft annealing: 650-700°C, Quenching: 870-930°C (Oil or Water), Tempering: 580-700°C, Nitriding: 480-570°C

Hot forming

It is formable at 900-1100°C.

Processing history

Quenched and Tempered

Welding

It is difficult to weld and should will not used be in welded constructions.