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ACI-ASTM CK20 Steel vs. SAE-AISI M47 Steel

Both ACI-ASTM CK20 steel and SAE-AISI M47 steel are iron alloys. They have 57% 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 ACI-ASTM CK20 steel and the bottom bar is SAE-AISI M47 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 530
810 to 2310

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Melting Completion (Liquidus), °C 1400
1540
Melting Onset (Solidus), °C 1430
1500
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 14
23
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 25
26
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 4.4
7.4
Embodied Energy, MJ/kg 62
100
Embodied Water, L/kg 190
120

Common Calculations

PREN (Pitting Resistance) 26
38
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
28 to 79
Strength to Weight: Bending, points 19
24 to 48
Thermal Diffusivity, mm2/s 3.7
6.3
Thermal Shock Resistance, points 13
27 to 77

Alloy Composition

Carbon (C), % 0 to 0.2
1.1 to 1.2
Chromium (Cr), % 23 to 27
3.5 to 4.0
Cobalt (Co), % 0
4.8 to 5.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 46.7 to 58
78.7 to 85
Manganese (Mn), % 0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 0 to 0.5
9.3 to 10
Nickel (Ni), % 19 to 22
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0.2 to 0.45
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
1.3 to 1.8
Vanadium (V), % 0
1.2 to 1.4