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AWS BNi-6 vs. ASTM A229 Spring Steel

AWS BNi-6 belongs to the nickel alloys classification, while ASTM A229 spring steel belongs to the iron alloys. There are 19 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 AWS BNi-6 and the bottom bar is ASTM A229 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
190
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 62
72
Tensile Strength: Ultimate (UTS), MPa 450
1690 to 1890

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 880
1450
Melting Onset (Solidus), °C 880
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 9.8
12

Otherwise Unclassified Properties

Base Metal Price, % relative 55
1.8
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 9.4
1.4
Embodied Energy, MJ/kg 130
19
Embodied Water, L/kg 210
46

Common Calculations

Stiffness to Weight: Axial, points 11
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 15
60 to 67
Strength to Weight: Bending, points 16
40 to 43
Thermal Shock Resistance, points 20
54 to 60

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Carbon (C), % 0 to 0.060
0.55 to 0.85
Cobalt (Co), % 0 to 0.1
0
Iron (Fe), % 0
97.5 to 99
Manganese (Mn), % 0
0.3 to 1.2
Nickel (Ni), % 87.2 to 90
0
Phosphorus (P), % 10 to 12
0 to 0.040
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.050
Titanium (Ti), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0