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1.2842 (1.2510)

Material no.:

Abbreviated DIN name:

Chemical analysis (%):
1.2842 (1.2510)

90 MnCrV 8


 
C
Si
Mn
Cr
V
0,90
0,25
2,00
0,35
0,10
HASCO colour code:
Flat steel:


Hardness when supplied:
black / blue
blue


annealed to approx. 229 HB (~770 N/mm²)

Characteristics

Material properties:

High hardness and compressive strength. Outstanding
machining properties and good dimensional stability


Uses:

Pressure and guide strips in injection moulding tools, applications
in punching, cutting and thermoforming tools, ejectors and cutting
stamps where high compressive strength and adequate toughness
are specified.

Physical properties

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

 
100 200 300 400 500 600 700
12,2 13,2 13,8 14,3 14,7 15,0 15,3





Thermal conductivity W / (m·K)

 
20 350 700
33,3 32,0 31,3

 


Remarks

Polishing:                    Technical polishing is possible.
Graining:                         Not usual.
Nitriding: Not usual.
Hardening: At 790°C – 820°C.
Details can be taken from the time-temperature conversion and tempering charts. The most suitable heat treatment for the relevant workpiece should be fixed by the hardening shop. The hardness should be specified by the hardening shop and checked on delivery.
Soft annealing:          680°C – 720°C, approx. 4 h
Stress-relief
annealing:
To eliminate residual stress after coarse machining at
approx. 600°C – 650°C, approx. 4 h with slow heating and furnace cooling.
Normal
working hardness:   
57 - 62 HRC


 

Time-temperature conversion chart                                                                                     Tempering chart

1.2842+1.2510_WDB_EN.png

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