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AWS BNi-8 vs. Grade 250 Maraging Steel

AWS BNi-8 belongs to the nickel alloys classification, while grade 250 maraging steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-8 and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
190
Poisson's Ratio 0.32
0.3
Shear Modulus, GPa 67
75
Tensile Strength: Ultimate (UTS), MPa 570
970 to 1800

Thermal Properties

Latent Heat of Fusion, J/g 390
270
Melting Completion (Liquidus), °C 1010
1480
Melting Onset (Solidus), °C 980
1430
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 46
32
Density, g/cm3 7.9
8.2
Embodied Carbon, kg CO2/kg material 8.2
4.9
Embodied Energy, MJ/kg 120
65
Embodied Water, L/kg 220
140

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 20
33 to 61
Strength to Weight: Bending, points 19
26 to 40
Thermal Shock Resistance, points 17
29 to 54

Alloy Composition

Aluminum (Al), % 0 to 0.050
0.050 to 0.15
Boron (B), % 0
0 to 0.0030
Calcium (Ca), % 0
0 to 0.050
Carbon (C), % 0 to 0.060
0 to 0.030
Cobalt (Co), % 0 to 0.1
7.0 to 8.5
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 0
66.3 to 71.1
Manganese (Mn), % 21.5 to 24.5
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 61.6 to 68.5
17 to 19
Phosphorus (P), % 0 to 0.020
0 to 0.010
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 6.0 to 8.0
0 to 0.1
Sulfur (S), % 0 to 0.020
0 to 0.010
Titanium (Ti), % 0 to 0.050
0.3 to 0.5
Zirconium (Zr), % 0 to 0.050
0 to 0.020
Residuals, % 0 to 0.5
0