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ASTM B780 Alloy vs. Grade 250 Maraging Steel

ASTM B780 alloy belongs to the otherwise unclassified metals classification, while grade 250 maraging steel belongs to the iron alloys. There are 15 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 grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
190
Elongation at Break, % 1.1 to 9.1
7.3 to 17
Poisson's Ratio 0.36
0.3
Shear Modulus, GPa 30
75
Shear Strength, MPa 200 to 340
600 to 1060
Tensile Strength: Ultimate (UTS), MPa 330 to 590
970 to 1800

Thermal Properties

Latent Heat of Fusion, J/g 140
270
Specific Heat Capacity, J/kg-K 270
450
Thermal Expansion, µm/m-K 18
12

Otherwise Unclassified Properties

Density, g/cm3 10
8.2

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
33 to 61
Strength to Weight: Bending, points 11 to 15
26 to 40
Thermal Shock Resistance, points 16 to 29
29 to 54

Alloy Composition

Aluminum (Al), % 0
0.050 to 0.15
Boron (B), % 0
0 to 0.0030
Cadmium (Cd), % 0 to 0.050
0
Calcium (Ca), % 0
0 to 0.050
Carbon (C), % 0
0 to 0.030
Cobalt (Co), % 0
7.0 to 8.5
Copper (Cu), % 23.5 to 25.7
0
Iron (Fe), % 0 to 0.050
66.3 to 71.1
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 0.35 to 0.65
17 to 19
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 74 to 76
0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0.3 to 0.5
Zinc (Zn), % 0 to 0.060
0
Zirconium (Zr), % 0
0 to 0.020

Comparable Variants