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SAE-AISI M4 Steel vs. ACI-ASTM CA6N Steel

Both SAE-AISI M4 steel and ACI-ASTM CA6N steel are iron alloys. They have 84% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, 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 CA6N steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 76
75
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
1080

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1610
1440
Melting Onset (Solidus), °C 1560
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 25
23
Thermal Expansion, µm/m-K 12
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 25
11
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 14
2.5
Embodied Energy, MJ/kg 210
35
Embodied Water, L/kg 110
110

Common Calculations

PREN (Pitting Resistance) 30
12
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 72
38
Strength to Weight: Bending, points 23 to 45
30
Thermal Diffusivity, mm2/s 6.9
6.1
Thermal Shock Resistance, points 24 to 68
40

Alloy Composition

Carbon (C), % 1.3 to 1.4
0 to 0.060
Chromium (Cr), % 3.8 to 4.8
10.5 to 12.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
77.9 to 83.5
Manganese (Mn), % 0.15 to 0.4
0 to 0.5
Molybdenum (Mo), % 4.3 to 5.5
0
Nickel (Ni), % 0 to 0.3
6.0 to 8.0
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.2 to 0.45
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0