Firmodur 7226 QT

Alternative and trade names
Firmodur 7226, 1.7226, 34CrMoS4
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Description

1.7226 (34CrMoS4) is a quenched and tempered steel can be used in automotive engineering, as parts of the axes.

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

Carbon

0.3 - 0.37 %

Chromium

0.9 - 1.2 %

Iron

Balance

Manganese

0.6 - 0.9 %

Molybdenum

0.15 - 0.3 %

Phosphorus

0.03 %

Silicon

0.4 %

Sulfur

0.02 - 0.04 %

Technological properties

Property
Application areas

It is used in automotive engineering, as parts of the axes.

Heat Treatment

Normalizing 840-880°C (Air), Soft annealing: 680-720°C (Air, slow cooling), Quenching: 830-890°C (Water, Oil, Polymer), Tempering: 540-680°C (Air)

Hot forming

It is formable at 850-1100°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.