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ACI-ASTM CA15M Steel vs. SAE-AISI 8642 Steel

Both ACI-ASTM CA15M steel and SAE-AISI 8642 steel are iron alloys. They have 87% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA15M steel and the bottom bar is SAE-AISI 8642 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 20
23
Fatigue Strength, MPa 330
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 690
580
Tensile Strength: Yield (Proof), MPa 510
380

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 760
410
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
39
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.1
1.5
Embodied Energy, MJ/kg 29
20
Embodied Water, L/kg 100
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 670
390
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
20
Strength to Weight: Bending, points 22
20
Thermal Diffusivity, mm2/s 7.2
10
Thermal Shock Resistance, points 25
17

Alloy Composition

Carbon (C), % 0 to 0.15
0.4 to 0.45
Chromium (Cr), % 11.5 to 14
0.4 to 0.6
Iron (Fe), % 82.1 to 88.4
96.6 to 97.8
Manganese (Mn), % 0 to 1.0
0.75 to 1.0
Molybdenum (Mo), % 0.15 to 1.0
0.15 to 0.25
Nickel (Ni), % 0 to 1.0
0.4 to 0.7
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.65
0.15 to 0.35
Sulfur (S), % 0 to 0.040
0 to 0.040