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ASTM Grade HP Steel vs. AWS BNi-5a

ASTM grade HP steel belongs to the iron alloys classification, while AWS BNi-5a belongs to the nickel alloys. They have 56% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HP steel and the bottom bar is AWS BNi-5a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
72
Tensile Strength: Ultimate (UTS), MPa 490
480

Thermal Properties

Latent Heat of Fusion, J/g 320
420
Melting Completion (Liquidus), °C 1370
1150
Melting Onset (Solidus), °C 1330
1070
Specific Heat Capacity, J/kg-K 480
500
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 34
55
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 5.8
9.0
Embodied Energy, MJ/kg 82
130
Embodied Water, L/kg 220
260

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 17
17
Thermal Shock Resistance, points 11
15

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
1.0 to 1.5
Carbon (C), % 0.35 to 0.75
0 to 0.1
Chromium (Cr), % 24 to 28
18.5 to 19.5
Cobalt (Co), % 0
0 to 0.1
Iron (Fe), % 29.2 to 42.7
0 to 0.5
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 33 to 37
70.1 to 73.5
Phosphorus (P), % 0 to 0.040
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 2.5
7.0 to 7.5
Sulfur (S), % 0 to 0.040
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5