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ASTM A387 Grade 21 Steel vs. N06975 Nickel

ASTM A387 grade 21 steel belongs to the iron alloys classification, while N06975 nickel belongs to the nickel alloys. They have a modest 22% 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 (6, 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 N06975 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
45
Fatigue Strength, MPa 160 to 250
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
80
Shear Strength, MPa 310 to 370
470
Tensile Strength: Ultimate (UTS), MPa 500 to 590
660
Tensile Strength: Yield (Proof), MPa 230 to 350
250

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Maximum Temperature: Mechanical, °C 480
1000
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
50
Density, g/cm3 7.9
8.3
Embodied Carbon, kg CO2/kg material 1.8
8.9
Embodied Energy, MJ/kg 23
120
Embodied Water, L/kg 62
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
240
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
22
Strength to Weight: Bending, points 18 to 20
20
Thermal Shock Resistance, points 14 to 17
18

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.030
Chromium (Cr), % 2.8 to 3.3
23 to 26
Copper (Cu), % 0
0.7 to 1.2
Iron (Fe), % 94.4 to 96
10.2 to 23.6
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
5.0 to 7.0
Nickel (Ni), % 0
47 to 52
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Titanium (Ti), % 0
0.7 to 1.5