Nitrodur 8550 QT

Alternative und Handelsbezeichungen
Nitrodur 8550, 1.8550, 34CrAlNi7-10
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Description

1.8550 (34CrAlNi7-10) is a nitriding steel used in automotive and mechanical industry for heat-treated parts which the surface needs to have high wear resistance.

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

7.6 g/cm³

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Abmessung

PropertyValueComment

Durchmesser

250 mm

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max.

Mechanisch

PropertyValueComment

Charpy impact energy, V-notch

30 - 35 J

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Dehnung

10 - 13 %

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A5

Elastizitätsmodul

210 GPa

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Härte, Brinell

248 [-]

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annealed

Streckgrenze

600 - 680 MPa

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Zugfestigkeit

800 - 1100 MPa

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Thermisch

PropertyTemperatureValueComment

Koeffizient der thermischen Ausdehnung

100 °C

1.11e-05 1/K

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for 20°C to the mentioned temperature

200 °C

1.21e-05 1/K

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for 20°C to the mentioned temperature

300 °C

1.29e-05 1/K

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for 20°C to the mentioned temperature

400 °C

1.35e-05 1/K

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for 20°C to the mentioned temperature

Spezifische Wärmekapazität

420 J/(kg·K)

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Wärmeleitfähigkeit

42.6 W/(m·K)

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Elektrisch

PropertyValue

spezifischer Widerstand

1.9e-07 Ω·m

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Chemical properties

PropertyValue

Aluminium

0.8 - 1.2 %

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Chrom

1.5 - 1.8 %

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Eisen

Balance

Kohlenstoff

0.3 - 0.37 %

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Mangan

0.4 - 0.7 %

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Molybdän

0.15 - 0.25 %

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Nickel

0.85 - 1.15 %

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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 heat-treated components which have been subjected to very high wear stresses, such as cam plates, eccentrics or pinion shafts.

Heat Treatment

Soft annealing: 650-700°C (Slow furnace cooling down), Quenching: 870-930°C (Oil, Water, Polymer), Tempering: 580-700°C (Air), Nitriding: 480-570°C

Hot forming

It is formable at 850-1050°C and should then cooled slowly.

Processing history

Quenched and Tempered

Welding

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