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ASTM A387 Grade 21 Steel vs. N07773 Nickel

ASTM A387 grade 21 steel belongs to the iron alloys classification, while N07773 nickel belongs to the nickel alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 N07773 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
40
Fatigue Strength, MPa 160 to 250
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
77
Shear Strength, MPa 310 to 370
480
Tensile Strength: Ultimate (UTS), MPa 500 to 590
710
Tensile Strength: Yield (Proof), MPa 230 to 350
270

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Maximum Temperature: Mechanical, °C 480
990
Melting Completion (Liquidus), °C 1470
1510
Melting Onset (Solidus), °C 1430
1460
Specific Heat Capacity, J/kg-K 470
450
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
75
Density, g/cm3 7.9
8.5
Embodied Carbon, kg CO2/kg material 1.8
13
Embodied Energy, MJ/kg 23
180
Embodied Water, L/kg 62
260

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
220
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
180
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 Shock Resistance, points 14 to 17
20

Alloy Composition

Aluminum (Al), % 0
0 to 2.0
Carbon (C), % 0.050 to 0.15
0 to 0.030
Chromium (Cr), % 2.8 to 3.3
18 to 27
Iron (Fe), % 94.4 to 96
0 to 32
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
2.5 to 5.5
Nickel (Ni), % 0
45 to 60
Niobium (Nb), % 0
2.5 to 6.0
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.010
Titanium (Ti), % 0
0 to 2.0
Tungsten (W), % 0
0 to 6.0