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SAE-AISI M34 Steel vs. ACI-ASTM CG8M Steel

Both SAE-AISI M34 steel and ACI-ASTM CG8M steel are iron alloys. They have 72% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M34 steel and the bottom bar is ACI-ASTM CG8M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 800 to 2170
550

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1540
1450
Melting Onset (Solidus), °C 1500
1400
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 24
16
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 32
20
Density, g/cm3 8.2
7.9
Embodied Carbon, kg CO2/kg material 9.5
4.1
Embodied Energy, MJ/kg 140
56
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 35
31
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 74
19
Strength to Weight: Bending, points 23 to 46
19
Thermal Diffusivity, mm2/s 6.7
4.3
Thermal Shock Resistance, points 25 to 67
12

Alloy Composition

Carbon (C), % 0.85 to 0.92
0 to 0.080
Chromium (Cr), % 3.5 to 4.0
18 to 21
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 71.3 to 76.5
58.8 to 70
Manganese (Mn), % 0.15 to 0.4
0 to 1.5
Molybdenum (Mo), % 7.8 to 9.2
3.0 to 4.0
Nickel (Ni), % 0 to 0.3
9.0 to 13
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), % 1.4 to 2.1
0
Vanadium (V), % 1.9 to 2.3
0