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SAE-AISI A7 Steel vs. ACI-ASTM CK35MN Steel

Both SAE-AISI A7 steel and ACI-ASTM CK35MN steel are iron alloys. They have 55% 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 A7 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 72
81
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
650

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 37
12
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
31
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 13
5.9
Embodied Energy, MJ/kg 200
81
Embodied Water, L/kg 100
210

Common Calculations

PREN (Pitting Resistance) 11
48
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 77
22
Strength to Weight: Bending, points 25 to 48
21
Thermal Diffusivity, mm2/s 10
3.3
Thermal Shock Resistance, points 27 to 72
14

Alloy Composition

Carbon (C), % 2.0 to 2.9
0 to 0.035
Chromium (Cr), % 5.0 to 5.8
22 to 24
Copper (Cu), % 0 to 0.25
0 to 0.4
Iron (Fe), % 81.4 to 87.7
43.4 to 51.8
Manganese (Mn), % 0 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.4
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 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0.5 to 1.5
0
Vanadium (V), % 3.9 to 5.2
0