Grade M44 Tool Steel (UNS T11344)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Proper heating of tool steels is essential for adequate performance, and the choice of tool steels depends on the impact loading and service conditions and cutting edge characteristics. Tool steels are used for special applications such as injection molding due to its abrasion resistance.

The following datasheet will provide an overview of grade M44 tool steel, which is a molybdenum high speed tool steel.

Chemical Composition

The chemical composition of M44 tool steels is outlined in the following table.

Element Content (%)
Cobalt, Co 11-12.25
Molybdenum, Mo 6-7
Tungsten, W 5-5.75
Chromium, Cr 4-4.75
Vanadium, V 1.85-2.2
Carbon, C 1.10-1.20
Silicon, Si 0.3-0.55
Nickel, Ni 0.3
Copper, Cu 0.25
Manganese, Mn 0.2-0.4
Phosphorus, P 0.03
Sulfur, S 0.03

Physical Properties

The following table shows the physical properties of M44 tool steels.

Properties Metric Imperial
Density 7.7-8.03 g/cm3 0.278 – 0.290 lb/in3

Mechanical Properties

The mechanical properties of M44 tool steels are displayed in the following table.

Properties Metric Imperial
Tensile strength 650-880 MPa 94275-127633 psi
Yield strength 350-550 50763-79771 psi
Modulus of elasticity 190-210 GPa 27557-30458 ksi
Poisson’s ratio 0.27-0.3 0.27-0.3
Elongation 8-25% 8-25%

Thermal Properties

The thermal properties of M44 tool steels are given in the following table

Properties Metric Imperial
Thermal conductivity 25 W/mK 173.3².°F

Other Designations

The equivalent materials to M44 tool steels include:

  • ASTM A600
  • FED QQ-T-590


M44 tool steels are chiefly used in aircraft and petrochemical industries.


  1. prajwal jangale prajwal jangale India says:

    What is the melting point of M44?

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