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ACI-ASTM CH20 Steel vs. SAE-AISI D7 Steel

Both ACI-ASTM CH20 steel and SAE-AISI D7 steel are iron alloys. They have 74% 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 CH20 steel and the bottom bar is SAE-AISI D7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 610
800 to 2120

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
27
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 20
10
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 3.7
11
Embodied Energy, MJ/kg 53
180
Embodied Water, L/kg 180
130

Common Calculations

PREN (Pitting Resistance) 25
16
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
29 to 78
Strength to Weight: Bending, points 21
25 to 48
Thermal Diffusivity, mm2/s 3.7
7.4
Thermal Shock Resistance, points 15
27 to 72

Alloy Composition

Carbon (C), % 0 to 0.2
2.2 to 2.5
Chromium (Cr), % 22 to 26
11.5 to 13.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 54.7 to 66
76.6 to 81.9
Manganese (Mn), % 0 to 1.5
0 to 0.6
Molybdenum (Mo), % 0 to 0.5
0.7 to 1.2
Nickel (Ni), % 12 to 15
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030
Vanadium (V), % 0
3.8 to 4.4