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HS 6-5-4/E M4/SKH 54 M4 High Speed Steel

M4 is an extremely versatile high-speed steel with its extremely high carbon and vanadium contents for exceptional abrasion-resistance. It is well suited for premium cutting tools of all types, particularly those used for machining abrasive alloys, castings and heat-treated materials. The high carbon content enables M4 steel to be hardened in excess of 65HRC.
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  • HS 6-5-4/E M4/SKH 54 M4


HS 6-5-4/E M4/SKH 54 M4 High Speed Steel

M4 is an extremely versatile high-speed steel with its extremely high carbon and vanadium contents for exceptional abrasion-resistance. It is well suited for premium cutting tools of all types, particularly those used for machining abrasive alloys, castings and heat-treated materials. The high carbon content enables M4 steel to be hardened in excess of 65HRC. However, the high hardness and high vanadium carbide content make it more difficult to grind after heat treatment compared to M2 and other high-speed steels.


Other Known Names: HS 6-5-4, E M4, SKH 54, Stark.

Physical Properties


Density

0.288 lb/in3 (7972 kg/m3)


Specific Gravity

7.97


Modulus Of Elasticity

30 x 106 psi (207 GPa)


Machinability

35-40% of a 1% carbon steel


M4 High Speed Steel Chemical Composition







MAXIMUMTYPICAL
CarbonChromiumTungstenMolybdenumVanadiumCobaltAnnealedTempered
CCrWMoVCoHbHrC
1.34.255.854.754.1-25565


M4 High Speed Steel Heat Treating
ANNEALINGPREHEATAUSTENITIZINGQUENCHTEMPERING
TempTempTempMediumTemp
°F°F°F
°F
1550/16001500/15502175/2225Salt/Oil/Atm1025/1050



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