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SAE-AISI H12 Steel vs. ACI-ASTM CK35MN Steel

Both SAE-AISI H12 steel and ACI-ASTM CK35MN steel are iron alloys. They have 55% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H12 steel and the bottom bar is ACI-ASTM CK35MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
81
Tensile Strength: Ultimate (UTS), MPa 690 to 1850
650

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1440
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 36
12
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.3
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.5
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
31
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 2.9
5.9
Embodied Energy, MJ/kg 41
81
Embodied Water, L/kg 76
210

Common Calculations

PREN (Pitting Resistance) 12
48
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 65
22
Strength to Weight: Bending, points 22 to 42
21
Thermal Diffusivity, mm2/s 9.8
3.3
Thermal Shock Resistance, points 22 to 60
14

Alloy Composition

Carbon (C), % 0.3 to 0.4
0 to 0.035
Chromium (Cr), % 4.8 to 5.5
22 to 24
Copper (Cu), % 0 to 0.25
0 to 0.4
Iron (Fe), % 87.8 to 91.7
43.4 to 51.8
Manganese (Mn), % 0.2 to 0.5
0 to 2.0
Molybdenum (Mo), % 1.3 to 1.8
6.0 to 6.8
Nickel (Ni), % 0 to 0.3
20 to 22
Nitrogen (N), % 0
0.21 to 0.32
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0.8 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 1.0 to 1.7
0
Vanadium (V), % 0 to 0.5
0