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ASTM A387 Grade 21 Steel vs. Nickel 80A

ASTM A387 grade 21 steel belongs to the iron alloys classification, while nickel 80A belongs to the nickel alloys. 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 21 steel and the bottom bar is nickel 80A.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
22
Fatigue Strength, MPa 160 to 250
430
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Shear Strength, MPa 310 to 370
660
Tensile Strength: Ultimate (UTS), MPa 500 to 590
1040
Tensile Strength: Yield (Proof), MPa 230 to 350
710

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Maximum Temperature: Mechanical, °C 480
980
Melting Completion (Liquidus), °C 1470
1360
Melting Onset (Solidus), °C 1430
1310
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
11
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
55
Density, g/cm3 7.9
8.3
Embodied Carbon, kg CO2/kg material 1.8
9.8
Embodied Energy, MJ/kg 23
140
Embodied Water, L/kg 62
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
210
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
1300
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 18 to 21
35
Strength to Weight: Bending, points 18 to 20
27
Thermal Diffusivity, mm2/s 11
2.9
Thermal Shock Resistance, points 14 to 17
31

Alloy Composition

Aluminum (Al), % 0
0.5 to 1.8
Carbon (C), % 0.050 to 0.15
0 to 0.1
Chromium (Cr), % 2.8 to 3.3
18 to 21
Iron (Fe), % 94.4 to 96
0 to 3.0
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
69.4 to 79.7
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.015
Titanium (Ti), % 0
1.8 to 2.7