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SAE-AISI M4 Steel vs. SAE-AISI S6 Steel

Both SAE-AISI M4 steel and SAE-AISI S6 steel are iron alloys. They have 82% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is SAE-AISI S6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
72
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
670 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1610
1430
Melting Onset (Solidus), °C 1560
1390
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 25
41
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 25
3.2
Density, g/cm3 8.3
7.7
Embodied Carbon, kg CO2/kg material 14
2.3
Embodied Energy, MJ/kg 210
33
Embodied Water, L/kg 110
56

Common Calculations

PREN (Pitting Resistance) 30
2.7
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 72
24 to 70
Strength to Weight: Bending, points 23 to 45
22 to 45
Thermal Diffusivity, mm2/s 6.9
11
Thermal Shock Resistance, points 24 to 68
22 to 64

Alloy Composition

Carbon (C), % 1.3 to 1.4
0.4 to 0.5
Chromium (Cr), % 3.8 to 4.8
1.2 to 1.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 75.9 to 81.4
92.8 to 94.7
Manganese (Mn), % 0.15 to 0.4
1.2 to 1.5
Molybdenum (Mo), % 4.3 to 5.5
0.3 to 0.5
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
2.0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0.2 to 0.4

Comparable Variants