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Lowering tension

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

Franz Kohler
Head of Product Division

1.1730 Tool steel

Designation

DIN:C 45 U
AFNOR:XC 48
UNI:-
AISI:1045


Chemical composition:
 

C0.45
Si0.30
Mn0.70

 
Strength:

≈ 640 N/mm²

Thermal conductivity at 20 °C:

50 W/m K


Character:

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

Application:

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


Treatment by

unusual:
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

Hardening:
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

Tempering:
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:

 

Back to overview

Available in the web shop as:
Data sheet 1.1730

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Material grades brochure

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