SAE-AISI M6 (T11306) Cobalt High-Speed Steel
Tool Steels
Property Overview
Density8.4g/cm³
Elastic Modulus200GPa
Tensile Strength840 to 2210MPa
Yield StrengthUnknown
Brinell HardnessUnknown
Maximum Service TemperatureUnknown
Chemical Composition
C
0.75 to 0.85%
CR
3.8 to 4.5%
MO
4.5 to 5.5%
MN
0.15 to 0.4%
SI
0.2 to 0.45%
P
0 to 0.030%
S
0 to 0.030%
V
1.3 to 1.7%
CO
11 to 13%
W
3.8 to 4.8%
FE
68.8 to 74.6%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Poisson's Ratio
0.29
Shear Modulus
77 GPa
Tensile Strength: Ultimate (UTS)
840 to 2210 MPa
Physical
Density
8.4 g/cm 3
Thermal
Latent Heat of Fusion
260 J/g
Melting Completion (Liquidus)
1560 °C
Melting Onset (Solidus)
1510 °C
Specific Heat Capacity
440 J/kg-K
Thermal Conductivity
17 W/m-K
Thermal Diffusivity
4.7 mm 2 /s
Thermal Expansion
12 µm/m-K
Thermal Shock Resistance
26 to 68 points
Calculated
PREN (Pitting Resistance)
28
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
28 to 73 points
Strength to Weight: Bending
24 to 45 points
Environmental
Base Metal Price
39 % relative
Embodied Carbon
8.0 kg CO 2 /kg material
Embodied Energy
120 MJ/kg
Embodied Energy
120 MJ/kg 50 x 10 3 BTU/lb
Embodied Water
160 L/kg
Embodied Water
160 L/kg 19 gal/lb
Registered Designations & Aliases
SAE-AISI M6 (T11306) Cobalt High-Speed SteelT11306
Standards
ASTM A600 ASTM A600: Standard Specification for Tool Steel High Speed
ASTM A600 ASTM A600: Standard Specification for Tool Steel High Speed Tool Steels, 5th ed., George Roberts et al., 1998 Tool Steels: Properties and Performance, Rafael A. Mesquita (editor), 2016