M3 High Speed Steel


M3 high-speed steel contains carbon and vanadium levels that are intermediate between those of M2 and M4. This gives the steel a fine balance of wear-resistance and grindability, and provides superior resistance to abrasion and edge breakdown. This makes M3 high-speed steel a superb tool material for form tools and roll turning for severe cutting operations. An increase in tool life will also be experienced in the machining of heat-treated sections, castings and similar hard materials.

Other Known Names: REX M3-1®, PM M3, Corsair

Griggs Steel Color Code: Blue

Common Usage

Broaches, Blades, Form Tools, and Reamers

Physical Properties

Density

0.295 lb/in3 (8166 kg/m3)

Specific Gravity

8.17

Modulus Of Elasticity

30 x 106 psi (207 GPa)

Machinability

37-42% of a 1% carbon steel

M3 High Speed Steel Chemical Composition

MaximumTypical
CarbonChromiumTungstenMolybdenumVanadiumCobaltAnnealedTempered
CCrWMoVCoHbHrC
1.054.156.155.752.5-25566

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