M2 (1.3343) – vimsteel

M2 HIGH SPEED STEEL

Material available in round and flat sections

M2 is a medium alloyed High-Speed Steel which has a good machinability and a good performance and is used in a wide variety of applications.

Applications

For use on:

Twist Drills
Milling cutters
End mills

Twist Drills
Milling cutters
End mills

Physical Properties

Temperature	20°C	400°C	600°C
Density g/cm3	8	7.9	7.9
Modulus of elasticity kN/mm²	225	200	180
Thermal expansion ratio per °C	–	11.5×10 -6	11.8×10 -6
Thermal conductivity W/m°C	24	28	27
Speciﬁc heat J/kg°C	420	510	600

Stress Relieving

Heat to 650 / 700 C. Hold for 2 – 4 hours and furnace cool.

Hardening

Heat slowly to 101 O / 1060° C and oil quench. Smaller sections can be air cooled. As quenched hardness in the range of Rockwell “C” 60 / 61 is possible.

Tempering

Tempering 440C in the range of 180 / 230° C is recommended to develop full -working hardness in the range of Rockwell “Cn 57 I 59.

TYPICAL HARDNESS AFTER TEMPERING

Temperature °C	Rockwell C	Brinell
150	60-61	614
180	57-59	578
200	57-58	578
260	56	555
320	55-56	555
430	56	555
540	57-59	578
650	38-39	352

TYPICAL MECHANICAL PROPERTIES

These curves indicate typical values obtained from standard test specimens air cooled from 1030°C and double tempered at 600°C.

TEMPERING °C	HARDNESS RC	U.T.S KSI	TENSILE YIELD KSI	% ELONGATION IN 50MM	% REDUCTION OF AREA	COMPRESSIVE STRENGTH KSI
Annealed As Quenced	98	110	70	15	30
1040	61/62
260	57	265	230			350
320	53/56	267	230			338
430	54	267	230			330
540	43/45	248	200			321
650	38/39	150	130			181

M2 HIGH SPEED STEEL

For use on:

We supply a comprehensive range of special steel products.