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ASTM B780 Alloy vs. SAE-AISI M4 Steel

ASTM B780 alloy belongs to the otherwise unclassified metals classification, while SAE-AISI M4 steel belongs to the iron alloys. There are 13 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ASTM B780 alloy and the bottom bar is SAE-AISI M4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
200
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 30
76
Tensile Strength: Ultimate (UTS), MPa 330 to 590
770 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 140
260
Specific Heat Capacity, J/kg-K 270
440
Thermal Expansion, µm/m-K 18
12

Otherwise Unclassified Properties

Density, g/cm3 10
8.3

Common Calculations

Stiffness to Weight: Axial, points 4.5
13
Stiffness to Weight: Bending, points 14
23
Strength to Weight: Axial, points 9.1 to 16
26 to 72
Strength to Weight: Bending, points 11 to 15
23 to 45
Thermal Shock Resistance, points 16 to 29
24 to 68

Alloy Composition

Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
1.3 to 1.4
Chromium (Cr), % 0
3.8 to 4.8
Copper (Cu), % 23.5 to 25.7
0 to 0.25
Iron (Fe), % 0 to 0.050
75.9 to 81.4
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0
4.3 to 5.5
Nickel (Ni), % 0.35 to 0.65
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 0.45
Silver (Ag), % 74 to 76
0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
5.3 to 6.5
Vanadium (V), % 0
3.8 to 4.5
Zinc (Zn), % 0 to 0.060
0

Comparable Variants