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ASTM Grade HN Steel vs. C71640 Copper-nickel

ASTM grade HN steel belongs to the iron alloys classification, while C71640 copper-nickel belongs to the copper alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 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 ASTM grade HN steel and the bottom bar is C71640 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
140
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
52
Tensile Strength: Ultimate (UTS), MPa 500
490 to 630

Thermal Properties

Latent Heat of Fusion, J/g 310
240
Maximum Temperature: Mechanical, °C 1080
260
Melting Completion (Liquidus), °C 1400
1180
Melting Onset (Solidus), °C 1350
1120
Specific Heat Capacity, J/kg-K 480
410
Thermal Conductivity, W/m-K 13
29
Thermal Expansion, µm/m-K 16
15

Otherwise Unclassified Properties

Base Metal Price, % relative 26
40
Density, g/cm3 7.9
8.9
Embodied Carbon, kg CO2/kg material 4.6
5.0
Embodied Energy, MJ/kg 66
73
Embodied Water, L/kg 180
280

Common Calculations

Stiffness to Weight: Axial, points 14
8.7
Stiffness to Weight: Bending, points 25
20
Strength to Weight: Axial, points 17
15 to 20
Strength to Weight: Bending, points 18
16 to 18
Thermal Diffusivity, mm2/s 3.5
8.2
Thermal Shock Resistance, points 11
16 to 21

Alloy Composition

Carbon (C), % 0.2 to 0.5
0
Chromium (Cr), % 19 to 23
0
Copper (Cu), % 0
61.7 to 67.8
Iron (Fe), % 44.9 to 57.8
1.7 to 2.3
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 2.0
1.5 to 2.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 23 to 27
29 to 32
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5