Nitrodur 8550 QT

Alternative and trade names
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

This material data has been provided by Deutsche Edelstahlwerke Specialty Steel (DEW).

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

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Dimension

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Mechanical

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Thermal

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Electrical

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Chemical properties

Property

Aluminium

0.8 - 1.2 %

Carbon

0.3 - 0.37 %

Chromium

1.5 - 1.8 %

Iron

Balance

Manganese

0.4 - 0.7 %

Molybdenum

0.15 - 0.25 %

Nickel

0.85 - 1.15 %

Phosphorus

0.03 %

Silicon

0.4 %

Sulfur

0.035 %

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.