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ASTM A387 Grade 21 Steel vs. N06007 Nickel

ASTM A387 grade 21 steel belongs to the iron alloys classification, while N06007 nickel belongs to the nickel alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21 steel and the bottom bar is N06007 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
38
Fatigue Strength, MPa 160 to 250
330
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
79
Shear Strength, MPa 310 to 370
470
Tensile Strength: Ultimate (UTS), MPa 500 to 590
690
Tensile Strength: Yield (Proof), MPa 230 to 350
260

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Maximum Temperature: Mechanical, °C 480
990
Melting Completion (Liquidus), °C 1470
1340
Melting Onset (Solidus), °C 1430
1260
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 41
10
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
60
Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 1.8
10
Embodied Energy, MJ/kg 23
140
Embodied Water, L/kg 62
260

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
200
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
170
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 18 to 21
23
Strength to Weight: Bending, points 18 to 20
21
Thermal Diffusivity, mm2/s 11
2.7
Thermal Shock Resistance, points 14 to 17
18

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.050
Chromium (Cr), % 2.8 to 3.3
21 to 23.5
Cobalt (Co), % 0
0 to 2.5
Copper (Cu), % 0
1.5 to 2.5
Iron (Fe), % 94.4 to 96
18 to 21
Manganese (Mn), % 0.3 to 0.6
1.0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
5.5 to 7.5
Nickel (Ni), % 0
36.1 to 51.1
Niobium (Nb), % 0
1.8 to 2.5
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0
0 to 1.0