M1 HIGH SPEED STEEL (1.3346)

Material available in round and flat sections

M1 High Speed Steel (1.3346) is molybdenum-based grade which has a good machinability, a good performance and is used for many applications. If you are looking for M1 High Speed Steel (1.3346), get in touch to find out more.

Applications

For use on:

Physical Properties

Temperature	20°C
Density g/cm3	8.0

4-Point Bend Strength

Hardening temperature in °C

Tempering 2 x 1 hour at 560°C

Dimension of test piece Ø 4.7 mm

Rmb = Ultimate bend strength in kN/mm

Reb = Bend yield strength in kN/mm

Tot. work = Total work in Nm

Heat Treatment

Soft annealing in a protective atmosphere at 850-900°C for 3 hours, followed by slow cooling 10°C per hour down to 700°C, then air cooling.
Stress-relieving at 600°C to 700°C for approximately 2 hours, slow cooling down to 500°C.
Hardening in a protective atmosphere with pre-heating in 2 steps at 450-500°C and 850-900°C and austenitising at a temperature suitable for chosen working hardness.
Tempering at 560°C three times for at least 1 hour each time.

Surface Treatment

The steel grade is a perfect substrate material for PVD coating. If nitriding is requested, a small diffusion zone is recommended but avoid compound and oxidized layers.

Guidelines For Hardening

Tempering temperature in °C

Hardness after hardening, quenching and tempering 2 x 1 hour

Tool	Hardening	Tempering
Single-edge cutting tools	1220°C	560°C
Multi-edge cutting tools	1180-1220°C	550-570°C
Cold work tools	1050-1150°C	550-570°C

We supply a comprehensive range of special steel products.

Whether you need tool steels, conventional high-speed steels, or powder metallurgy grades, our friendly team is ready to help meet your requirements. We cut and supply steel products for our customers, across the UK and Ireland, and specialise in niche products as well as standard commercial grades.