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Lowering tension

In our selected range you can find the right material for virtually any application.

1.1730 Tool steel


DIN:C 45 U

Chemical composition:



180 - 195 HB
(≈ 610 - 660 N/mm²)

Thermal conductivity at 20 °C:

50 W/m K


unalloyed tool steel with excellent machinability, good core toughness for minor applications; chilled cast steel, suitable for flame and inductive hardening


unhardened parts for mould, die and jig construction; plates and frames for mould bases and die sets

Treatment by

Polishing, etching, EDM, nitriding, hard chroming

Heat treatment:

Soft annealing:
680 to 710 °C for about 2 to 5 hours
slow controlled cooling of 10 to 20 °C per hour to about 600 °C;
further cooling in air, max. 190 HB

800 to 830 °C
Quenching in oil/hot bath/air
Obtainable hardness: 58 HRC
hardening depth 3−5 mm
max. 15 mm through hardening thickness

Slow heating to tempering temperature immediately after hardening, to 180 to 300 °C depending on desired hardness
1 hour per 20 mm: min. 2 hours

Annealing graph:

To the mould making overview To the die making overview

Available in the web shop as:
Data sheet 1.1730

Open PDF

Material grades brochure

Material grades brochure

Material grades poster

Material grades poster

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