Nitrodur 8515 QT

Alternative und Handelsbezeichungen
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

Diese Materialdaten wurden von Deutsche Edelstahlwerke Specialty Steel (DEW) zur Verfügung gestellt

Alle Daten beziehen sich auf Raumtemperatur soweit nicht anderweitig spezifiziert. SI Einheiten werden verwendt soweit nicht anderweitig spezifiziert.
Äquivalente Standards sind ähnlich zu einem oder mehreren Standards die der Anbieter angegeben hat. Manche äquivalente Standards können strikter sein oder außerhalb der Bedingungen des ursprünglichen Standards.

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Eigenschaften

Allgemein

PropertyValue

Dichte

7.7 g/cm³

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Abmessung

PropertyValueComment

Durchmesser

250 mm

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max.

Mechanisch

PropertyValueComment

Charpy impact energy, V-notch

25 - 30 J

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Dehnung

10 - 12 %

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A5

Elastizitätsmodul

210 GPa

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Hardness, Vickers, 1

800 [-]

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nitrided

Härte, Brinell

248 [-]

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annealed

Streckgrenze

675 - 835 MPa

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Zugfestigkeit

880 - 1230 MPa

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Thermisch

PropertyTemperatureValueComment

Koeffizient der thermischen Ausdehnung

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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300 °C

1.33e-05 1/K

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400 °C

1.39e-05 1/K

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Spezifische Wärmekapazität

430 J/(kg·K)

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Wärmeleitfähigkeit

42 W/(m·K)

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Elektrisch

PropertyValue

spezifischer Widerstand

1.9e-07 Ω·m

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Chemical properties

PropertyValue

Chrom

2.8 - 3.3 %

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Eisen

Balance

Kohlenstoff

0.28 - 0.35 %

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Mangan

0.4 - 0.7 %

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Molybdän

0.3 - 0.5 %

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Phosphor

0.025 %

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Schwefel

0.035 %

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Silizium

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.