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1.1730

Material no.:

Abbreviated DIN name:

Chemical analysis (%):
1.1730

C 45 U

 
C
Si
Mn
0,45
0,3
0,7
HASCO colour code:


Hardness when supplied:
white


annealed to max. 190 HB (~650 N/mm²)

Characteristics

Material properties:

Unalloyed mould steel, readily machinable, surface hardenable.

Uses:

In mould and apparatus construction where unhardened parts
are used, e.g. mould frames and add-on parts. This material
is normally used in its supplied condition.

Physical properties

Thermal expansion coefficient (10-6·m) / (m·K)    

    
100 200 300 400 500 600 700
11,0 12,0 13,0 13,5 14,0 14,2





Thermal conductivity W / (m·K)
        
    
20 350 700
50





For parts subjected to higher stresses, we recommend our case-hardening and heat-treatable steel types as well as our fully hardened steel.

Remarks

 
Polishing:  Not usual.
Graining:                Not usual.
Nitriding:                      Not usual.
Hardening: Hardening is fundamentally not usual because the risk of stress cracking and hardness distortion is very large. Should a hardening treatment be necessary in exceptional cases, the figures from the time-temperature conversion and tempering charts should be consulted. The most suitable heat treatment for the relevant work piece should be fixed by the hardening shop. The specified hardness should be prescribed by the hardening shop and checked on delivery
Soft annealing: 680°C – 710°C, approx. 3 h.
Stress-relief
annealing:
To eliminate residual stress after coarse machining at approx. 620°C,
approx. 4 h with slow furnace cooling.


 

Time-temperature conversion chart                                                                                     Tempering chart

1.1730_WDB_EN.png

Download the PDF here