M42 super high speed steel is a premium cobalt high speed steel with a chemical composition designed for high hardness and superior hot hardness. These properties make the steel an excellent choice for machining high-strength and pre-hardened steels, high-hardness alloys, and the difficult-to-machine, nonferrous super alloys used in the aerospace, oil, and power generation industries.
M42 exhibits excellent wear resistance by virtue of high heat-treated hardness (68 to 70 HRC), and the high cobalt content imparts the hot hardness. As such, the cutting edges on tools made from M42 super high speed steel stay sharp and hard in heavy-duty and high-production cutting applications.
1.APPLICATIONS: Twist drills, taps, milling cutters, reamers, broaches, saws, knives, and thread rolling dies.
2.Type: M42
3.M42 tool steel Shape: FLAT,ROUND BAR,SHEET
4.M42H11 tool steel Delivery condition: Annealed
5.Standard: ASTM681-2008
8.M42 tool steel Materials and Manufacture:ELECTRIC ARC AND VACUUMDEGASSING
9.M42 tool steel Chemical composition :
| C |
Si |
Cr |
W |
Mo |
V |
Co |
| 1.08 |
0.45 |
3.85 |
1.5 |
9.5 |
1.2 |
8 |
PHYSICAL PROPERTIES
·Density: 0.282 lb/in3 (7806 kg/m3)
·Specific Gravity: 7.81
·Modulus of Elasticity: 30 x 106 psi (207 GPa)
·Machinability: 35-40% of a 1% carbon steel
All tool steel is sold as annealed with the exception of P20 and 4140HT, which are heat treated to HRC 28/32
Steelmaking Process: EF, EF/EAF+LF+VD, EF/EAF+ESR
Audited Supplier 
Audited Supplier 
){kind=link}
){kind=link}