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ACI-ASTM CK20 Steel vs. SAE-AISI T15 Steel

Both ACI-ASTM CK20 steel and SAE-AISI T15 steel are iron alloys. They have 58% 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 T15 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
76
Tensile Strength: Ultimate (UTS), MPa 530
830 to 2240

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Melting Completion (Liquidus), °C 1400
1690
Melting Onset (Solidus), °C 1430
1640
Specific Heat Capacity, J/kg-K 480
430
Thermal Conductivity, W/m-K 14
21
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 25
43
Density, g/cm3 7.8
8.7
Embodied Carbon, kg CO2/kg material 4.4
16
Embodied Energy, MJ/kg 62
250
Embodied Water, L/kg 190
140

Common Calculations

PREN (Pitting Resistance) 26
27
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 19
26 to 71
Strength to Weight: Bending, points 19
22 to 43
Thermal Diffusivity, mm2/s 3.7
5.6
Thermal Shock Resistance, points 13
26 to 70

Alloy Composition

Carbon (C), % 0 to 0.2
1.5 to 1.6
Chromium (Cr), % 23 to 27
3.8 to 5.0
Cobalt (Co), % 0
4.8 to 5.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 46.7 to 58
67.5 to 73.5
Manganese (Mn), % 0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 0 to 0.5
0 to 1.0
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
0.15 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
11.8 to 13
Vanadium (V), % 0
4.5 to 5.3