Specifications

steel bearing block
1)1.2312/P20+S steel
2)hot rolled,T20~300mm or forging,T100~700mm
3)black or machined
4)28~35HRC

STEEL BEARING BLOCK 1.2312 FORGED STEEL BLOCK

1.2312 / P20+S / 40CrMnMoS8-6 SPECIAL STEEL

 

Mould steel 1.2312 steel

1.2312 /P20+S /40CrMnMoS8-6 special steel
1)Chemical Composition:

Grade	C	Si	Mn	P	S	Cr	Mo
1.2312	0.35-0.45	0.30-0.50	1.40-1.60	≤ 0.035	0.05-0.10	1.80-2.00	0.15-0.25

 

2)Available sizes:
Plate: Thickness 20 ~100mm, width 1600~ 2300mm
Delivery condition: Hot rolled, Black surface, Prehardened Hardness 28 ~ 34HRC

Some stock available.

3)Properties:
Plastic mould steel with excellent machinability properties because of the high S content, good toughness properties, good wear resistance, uniform hardness in all dimensions, dimensional stability, requiring no heat treatment, 280 - 325HB hardened and tempered condition, suitable for nitriding to increase wear resistance, not suitable for chrome plating, polishing and etch graining.

4)Applications:
Injection dies without special surface requirements and low mechanical stresses, medium and large sized moulds for plastic processing, dies of light alloys with low melting point, mould fittings, mould frames for the injection moulding and die casting industries, compenents for general mechanical engineering, tools for synthetic plastics processing, die holders, support plates, casings, chases, recipient sleeves, constructional parts, hyrdo forming tools.

5)Heat Treatment:
Annealing: 710 - 730 ° C
Hardness after annealing: Max. 230 HB
Stress relieving: Approx. 650 ° C
Hot forming: 1050 - 850 ° C
Hardening: 870 - 890 ° C
Quenching media: Oil, Salt bath, Vacuum
Hardness after quenching: 50 - 54 HRC
Hardness after tempering:
Tempering ° C
100
200
300
400

HRC
54
54
53
50