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SAE-AISI M3 Class 2 Steel vs. SAE-AISI S4 Steel

Both SAE-AISI M3 class 2 steel and SAE-AISI S4 steel are iron alloys. They have 81% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M3 class 2 steel and the bottom bar is SAE-AISI S4 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 77
72
Tensile Strength: Ultimate (UTS), MPa 770 to 2210
670 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1620
1430
Melting Onset (Solidus), °C 1570
1390
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 26
44
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
2.2
Density, g/cm3 8.3
7.7
Embodied Carbon, kg CO2/kg material 12
2.0
Embodied Energy, MJ/kg 180
29
Embodied Water, L/kg 110
48

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 74
24 to 77
Strength to Weight: Bending, points 22 to 45
22 to 48
Thermal Diffusivity, mm2/s 7.2
12
Thermal Shock Resistance, points 24 to 69
20 to 65

Alloy Composition

Carbon (C), % 1.2 to 1.3
0.5 to 0.65
Chromium (Cr), % 3.8 to 4.5
0.1 to 0.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.8 to 82.3
95.2 to 96.9
Manganese (Mn), % 0.15 to 0.4
0.6 to 1.0
Molybdenum (Mo), % 4.8 to 6.5
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
1.8 to 2.3
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.0 to 6.8
0
Vanadium (V), % 2.8 to 3.8
0.15 to 0.35

Comparable Variants