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Location: HomeProductsPowder Metallurgy High-speed SteelPM 4

PM 4

PM 4

Chemical composition


C Cr Mo W V
1.4 4.2 5.0 5.8 4.1

Standard control



Europe HS 6-5-4
Germany W.Nr.1.3361

Delivery hardness


Max 260HB

Properties


PM4 is a kind of high vanadium micro pure powder metallurgical tool steel, with the advantages of high strength and high toughness. It is very suitable for cold work tool, tool and wear-resistant parts. Especially when meting die breakage or fragmentation problems, it will be significant to consider the effectiveness via cost.


Supply size
Forging materials Size range(mm)
Round 90-380
Party/partial Rolled products

Minimum thickness 40
Rolled products
Skinning 10-72
The black board eraser Thickness 5-55

Width 20-260
Special shapes
As required
PMAs required
400*500*2100

400*500*1100

400*500*1000

400*250*1000

500*200*1000



Annealing treatment


Cooling to 700℃ slowly at a rate of 10℃/h under protective atmosphere of 850-900℃,then air cooling.

Strain relief


Keeping in 600-700℃ for 2 hours, and cooling to 500℃ slowly。

Quenching


Preheating in two steps under protective atmosphere, 400-500℃ and 850-900℃, and choosing the right temperature depending on the hardness and then cooling of austenite to40-50℃.

Tempering


560℃ 3 times, each time for at least 1 hour, cooling to room temperature after each tempered.



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