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ACI-ASTM CH20 Steel vs. SAE-AISI 5145 Steel

Both ACI-ASTM CH20 steel and SAE-AISI 5145 steel are iron alloys. They have 62% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 5145 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 38
20
Fatigue Strength, MPa 290
250
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 610
560
Tensile Strength: Yield (Proof), MPa 350
370

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
420
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
47
Thermal Expansion, µm/m-K 15
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 20
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.7
1.4
Embodied Energy, MJ/kg 53
19
Embodied Water, L/kg 180
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
100
Resilience: Unit (Modulus of Resilience), kJ/m3 300
360
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
20
Strength to Weight: Bending, points 21
19
Thermal Diffusivity, mm2/s 3.7
13
Thermal Shock Resistance, points 15
17

Alloy Composition

Carbon (C), % 0 to 0.2
0.43 to 0.48
Chromium (Cr), % 22 to 26
0.7 to 0.9
Iron (Fe), % 54.7 to 66
97.3 to 98
Manganese (Mn), % 0 to 1.5
0.7 to 0.9
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 12 to 15
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.0
0.15 to 0.35
Sulfur (S), % 0 to 0.040
0 to 0.040