M4 HIGH SPEED STEEL

Material available in round and flat sections

M4 High Speed Steel (Conventional) is a vanadium based grade used for cold work applications. Looking for M4 High Speed Steel (Conventional)? Contact our friendly sales team for more information.

Applications

Physical Properties

Temperature	20°C
Density g/cm3	8.0

4-Point Bend Strength

Tempering 2 x 1 hour at 560°C

Dimension of test piece Ø 4.7 mm

Rmb = Ultimate bend strength in kN/mm²

Reb = Bend yield strength in kN/mm²

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 twice 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, cryogenic treatment and tempering

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.