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AISI M2 HIGH SPEED STEEL

CHEMICAL COMPOSITION (Typical Analysis in %)

 

C Si Mn V W Cr Mo
0.90 0.30 0.30 1.90 6.40 4.10 5.00


M2 is a standard high-speed steel grade. Having balanced alloy composition forms the basis of its high toughness and good cutting edge retention, rendering it suitable for a large variety of applications.
This grade is mainly used for all metal-cutting tools for roughing or finishing such as twist drills, diverse milling cutters, thread dies, broaches, reamers, countersinks, thread chasers, circular saw segments, shaping tools and woodworking tools. Also highly suitable for cold-forming tools such as cold extrusion rams and dies, as well as cutting and precision cutting tools, plastic moulds with elevated wear resistance and screws.


Steel Properties

 

Standard high-speed steel grade. Its well-balanced alloy composition forms the basis of its high toughness and good cutting edge retention, rendering it suitable for a large variety of applications.


Physical Properties

 

Thermal Conductivity at °C 20 350 700
W/(m*K) 32.8 23.5 25.5

 

Application

 

For all metal-cutting tools for roughing or finishing such as twist drills, diverse milling cutters, thread dies, broaches, reamers, countersinks, thread chasers, circular saw segments, shaping tools and woodworking tools. Also highly suitable for cold-forming tools such as cold extrusion rams and dies, as well as cutting and precision cutting tools, plastic moulds with elevated wear resistance and screws.

 

Heat Treatment

 

Soft annealing °C Cooling Hardness HB
770 - 860 Furnace max. 269

 

Stress-relief annealing °C Cooling
630 - 650 Furnace

 

1st pre-heating °C 2nd and 3rd Hardening °C Quenching Tempering °C Hardness after Teperature HRC
up to approx. 400 in an air-circulating furnace 850 and 1050 1190 - 1230 Saltbath, at least 550 °C Oil ,Air at least twice 530-560 64 – 66

 

For cold-forming tools with a complex geometry, a hardening temperature at the lower end of the quoted range is recommended. The stated hardening temperatures apply to saltbath hardening only. For vacuum hardening, we suggest a reduction of 10 °C to 30 °C.