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SAE-AISI M4 Steel vs. SAE-AISI M36 Steel

Both SAE-AISI M4 steel and SAE-AISI M36 steel are iron alloys. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is SAE-AISI M36 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
810 to 2190

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1610
1600
Melting Onset (Solidus), °C 1560
1550
Specific Heat Capacity, J/kg-K 440
440
Thermal Conductivity, W/m-K 25
19
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 25
38
Density, g/cm3 8.3
8.4
Embodied Carbon, kg CO2/kg material 14
9.5
Embodied Energy, MJ/kg 210
140
Embodied Water, L/kg 110
140

Common Calculations

PREN (Pitting Resistance) 30
31
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 26 to 72
27 to 72
Strength to Weight: Bending, points 23 to 45
23 to 44
Thermal Diffusivity, mm2/s 6.9
5.1
Thermal Shock Resistance, points 24 to 68
25 to 68

Alloy Composition

Carbon (C), % 1.3 to 1.4
0.8 to 0.9
Chromium (Cr), % 3.8 to 4.8
3.8 to 4.5
Cobalt (Co), % 0
7.8 to 8.8
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 75.9 to 81.4
70.1 to 75.5
Manganese (Mn), % 0.15 to 0.4
0.15 to 0.4
Molybdenum (Mo), % 4.3 to 5.5
4.6 to 5.5
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
0.2 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.3 to 6.5
5.5 to 6.5
Vanadium (V), % 3.8 to 4.5
1.8 to 2.3

Comparable Variants