M-42 High Speed Tool Steel

AISI M42(UNS T11342) is the representative grade of high-carbon tungsten-molybdenum-cobalt high speed steel(HSS), which has the advantages of high normal temperature hardness (up to 70HRC) and high-temperature hardness, easy grinding and sharp.

M42 tool steel designation

AISI M42 / ASTM M42

ASTM A600

SAE J437

SAE J438

DIN 1.3246

JIS SKH9

Available forms

M42 round/square bar

M42 plate

M42 Flats

M42 Chemistry composition

CCrMoCuWVSiFe
1.05 – 1.153.50 – 4.259.00 – 10.008.001.15 – 1.850.95 – 1.350.15 – 0.65Balance

Physical and Mechanical Properties

Soft annealing °C:820 – 860

Hardening °C: 1160-1190

Thermal expansion at 20-200° C: 9.7 10⁶m/(m*K)

Hardness, Rockwell C: 66 HRC.

Applications

For tools having severe mechanical abrasion. Particularly suitable for die-sinking cutters, milling cutters and engraving machines including gravers as well as for tool bits in automatic lathes. Also suitable for non-cutting shapings such as cold extrusion rams and titanium alloys.

Features

Characterized by excessive put on resistance, red hardness and durability.

Easier to grind than most high speed steel.

LKALLOY is a leading Supplier of AISI M42 Steel. We mainly stocks and produces AISI M42 bar, AISI M42 flats, AISI M42 plates and other forms in various size and specifications.