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ASTM A387 Grade 9 Steel vs. N06985 Nickel

ASTM A387 grade 9 steel belongs to the iron alloys classification, while N06985 nickel belongs to the nickel alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 9 steel and the bottom bar is N06985 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 20 to 21
45
Fatigue Strength, MPa 160 to 240
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
80
Shear Strength, MPa 310 to 380
480
Tensile Strength: Ultimate (UTS), MPa 500 to 600
690
Tensile Strength: Yield (Proof), MPa 230 to 350
260

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Maximum Temperature: Mechanical, °C 600
990
Melting Completion (Liquidus), °C 1460
1350
Melting Onset (Solidus), °C 1410
1260
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 26
10
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 10
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
55
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 2.1
8.8
Embodied Energy, MJ/kg 28
120
Embodied Water, L/kg 87
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
250
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 18 to 21
23
Strength to Weight: Bending, points 18 to 20
21
Thermal Diffusivity, mm2/s 6.9
2.6
Thermal Shock Resistance, points 14 to 17
16

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.015
Chromium (Cr), % 8.0 to 10
21 to 23.5
Cobalt (Co), % 0
0 to 5.0
Copper (Cu), % 0
1.5 to 2.5
Iron (Fe), % 87.1 to 90.8
18 to 21
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
6.0 to 8.0
Nickel (Ni), % 0
35.9 to 53.5
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0
0 to 1.5
Vanadium (V), % 0 to 0.040
0