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SAE-AISI M4 Steel vs. SAE-AISI M48 Steel

Both SAE-AISI M4 steel and SAE-AISI M48 steel are iron alloys. They have 87% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is SAE-AISI M48 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
890 to 2390

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1610
1670
Melting Onset (Solidus), °C 1560
1620
Specific Heat Capacity, J/kg-K 440
420
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 25
48
Density, g/cm3 8.3
8.7
Embodied Carbon, kg CO2/kg material 14
13
Embodied Energy, MJ/kg 210
190
Embodied Water, L/kg 110
160

Common Calculations

PREN (Pitting Resistance) 30
37
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 26 to 72
28 to 76
Strength to Weight: Bending, points 23 to 45
23 to 45
Thermal Shock Resistance, points 24 to 68
26 to 71

Alloy Composition

Carbon (C), % 1.3 to 1.4
1.4 to 1.5
Chromium (Cr), % 3.8 to 4.8
3.5 to 4.0
Cobalt (Co), % 0
8.0 to 10
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 75.9 to 81.4
63.8 to 69.8
Manganese (Mn), % 0.15 to 0.4
0.15 to 0.4
Molybdenum (Mo), % 4.3 to 5.5
4.8 to 5.5
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.3 to 6.5
9.5 to 10.5
Vanadium (V), % 3.8 to 4.5
2.8 to 3.3

Comparable Variants