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
Broaches, Blades, Form Tools, and Reamers
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
| Maximum | Typical | ||||||
|---|---|---|---|---|---|---|---|
| Carbon | Chromium | Tungsten | Molybdenum | Vanadium | Cobalt | Annealed | Tempered |
| C | Cr | W | Mo | V | Co | Hb | HrC |
| 1.05 | 4.15 | 6.15 | 5.75 | 2.5 | - | 255 | 66 |
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