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SAE-AISI M4 Steel vs. ACI-ASTM CC50 Steel

Both SAE-AISI M4 steel and ACI-ASTM CC50 steel are iron alloys. They have 74% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is ACI-ASTM CC50 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
430

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1610
1420
Melting Onset (Solidus), °C 1560
1370
Specific Heat Capacity, J/kg-K 440
490
Thermal Conductivity, W/m-K 25
17
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 25
14
Density, g/cm3 8.3
7.6
Embodied Carbon, kg CO2/kg material 14
2.7
Embodied Energy, MJ/kg 210
39
Embodied Water, L/kg 110
170

Common Calculations

PREN (Pitting Resistance) 30
28
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
26
Strength to Weight: Axial, points 26 to 72
16
Strength to Weight: Bending, points 23 to 45
17
Thermal Diffusivity, mm2/s 6.9
4.5
Thermal Shock Resistance, points 24 to 68
14

Alloy Composition

Carbon (C), % 1.3 to 1.4
0 to 0.5
Chromium (Cr), % 3.8 to 4.8
26 to 30
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
62.9 to 74
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 4.3 to 5.5
0
Nickel (Ni), % 0 to 0.3
0 to 4.0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0