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SAE-AISI M48 Steel vs. ACI-ASTM CF20 Steel

Both SAE-AISI M48 steel and ACI-ASTM CF20 steel are iron alloys. They have 71% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M48 steel and the bottom bar is ACI-ASTM CF20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 890 to 2390
530

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1670
1420
Melting Onset (Solidus), °C 1620
1410
Specific Heat Capacity, J/kg-K 420
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 48
16
Density, g/cm3 8.7
7.8
Embodied Carbon, kg CO2/kg material 13
3.1
Embodied Energy, MJ/kg 190
44
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 37
20
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 28 to 76
19
Strength to Weight: Bending, points 23 to 45
19
Thermal Shock Resistance, points 26 to 71
11

Alloy Composition

Carbon (C), % 1.4 to 1.5
0 to 0.2
Chromium (Cr), % 3.5 to 4.0
18 to 21
Cobalt (Co), % 8.0 to 10
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 63.8 to 69.8
64.2 to 74
Manganese (Mn), % 0.15 to 0.4
0 to 1.5
Molybdenum (Mo), % 4.8 to 5.5
0
Nickel (Ni), % 0 to 0.3
8.0 to 11
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.4
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 9.5 to 10.5
0
Vanadium (V), % 2.8 to 3.3
0