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SAE-AISI H42 Steel vs. ACI-ASTM CG12 Steel

Both SAE-AISI H42 steel and ACI-ASTM CG12 steel are iron alloys. They have 70% 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 H42 steel and the bottom bar is ACI-ASTM CG12 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
78
Tensile Strength: Ultimate (UTS), MPa 700 to 1980
550

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1620
1410
Melting Onset (Solidus), °C 1570
1370
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 24
15
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 24
18
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.8
3.3
Embodied Energy, MJ/kg 130
48
Embodied Water, L/kg 98
160

Common Calculations

PREN (Pitting Resistance) 31
22
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 23 to 65
20
Strength to Weight: Bending, points 21 to 42
19
Thermal Diffusivity, mm2/s 6.5
4.0
Thermal Shock Resistance, points 20 to 57
12

Alloy Composition

Carbon (C), % 0.55 to 0.7
0 to 0.12
Chromium (Cr), % 3.8 to 4.5
20 to 23
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 79.3 to 83.8
60.3 to 70
Manganese (Mn), % 0.15 to 0.4
0 to 1.5
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 0 to 0.3
10 to 13
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0