M42 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.
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
| MAXIMUM | TYPICAL | ||||||
|---|---|---|---|---|---|---|---|
| Carbon | Chromium | Tungsten | Molybdenum | Vanadium | Cobalt | Annealed | Tempered |
| C | Cr | W | Mo | V | Co | Hb | HrC |
| 1.3 | 4.25 | 5.85 | 4.75 | 4.1 | – | 255 | 65 |
Bharti Steel is the leading Supplier & Stockiest of M42 Steel in India.
M42 is a excessive-carbon, excessive-pace steel founded on molybdenum. Characterized by excessive put on resistance, red hardness and durability. For this reason of its low vanadium content, this grade reveals excellent grind ability. This grade is most often used for die-sinking cutters, milling cutters and engraving machines together with gravers as good as for device bits in automatic lathes. Also suitable for non-reducing shaping (e.g. Cold extrusion rams and instruments employed in machining substances for the aviation industry equivalent to titanium alloys).
A general-purpose high-speed steel of the molybdenum type, M2/DIN 3247/AISI M42 steel has balanced toughness, wear-resistance, and red hardness characteristics. This grade is frequently used in cold work punches, dies, and high-speed, light-cutting applications. Group M steels make up over 95% of the high-speed steels produced in the US. Except for M6, all varieties of molybdenum high-speed steels from M1 to M10 contain tungsten. These steels do not contain any cobalt at all. Tools constructed of this type of steel can be coated with titanium nitride, titanium carbide, and several other materials using a physical vapor deposition technique to increase their functionality and durability.
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Steel Properties
High-carbon, high-speed steel based on molybdenum. Characterized by high wear resistance, red hardness and toughness. As a result of its low vanadium content, this grade exhibits good grindability.
Mechanical Properties:
| Impact Toughness | 13.6 J -24 J |
| Hardness | 65.8 HRC |
| Modulus of elasticity | 190-210 GPa |
Physical Properties:
These physical properties are approximate values and can vary depending on the specific composition , heat treatment and manufacturing processes used for M42/DIN 3247/AISI M42 steel.
| Density | 8.14 g/cm3 |
| Machinability | 35% -40% of 1 % Carbon steel |
| Thermal conductivity | 27.187 W/m °C |
| Coefficient of Thermal Expansion | 11.8 x 10-6/°C |