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ASTM A387 Grade 21 Steel vs. N07750 Nickel

ASTM A387 grade 21 steel belongs to the iron alloys classification, while N07750 nickel belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 N07750 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
25
Fatigue Strength, MPa 160 to 250
520
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 310 to 370
770
Tensile Strength: Ultimate (UTS), MPa 500 to 590
1200
Tensile Strength: Yield (Proof), MPa 230 to 350
820

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Maximum Temperature: Mechanical, °C 480
960
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 41
13
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
1.5

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
150
Embodied Water, L/kg 62
260

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
270
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
1770
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 18 to 21
40
Strength to Weight: Bending, points 18 to 20
30
Thermal Diffusivity, mm2/s 11
3.3
Thermal Shock Resistance, points 14 to 17
36

Alloy Composition

Aluminum (Al), % 0
0.4 to 1.0
Carbon (C), % 0.050 to 0.15
0 to 0.080
Chromium (Cr), % 2.8 to 3.3
14 to 17
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 94.4 to 96
5.0 to 9.0
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
70 to 77.7
Niobium (Nb), % 0
0.7 to 1.2
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.010
Titanium (Ti), % 0
2.3 to 2.8