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ASTM A387 Grade 21 Steel vs. Nickel 693

ASTM A387 grade 21 steel belongs to the iron alloys classification, while nickel 693 belongs to the nickel alloys. 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 nickel 693.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
34
Fatigue Strength, MPa 160 to 250
230
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
76
Shear Strength, MPa 310 to 370
440
Tensile Strength: Ultimate (UTS), MPa 500 to 590
660
Tensile Strength: Yield (Proof), MPa 230 to 350
310

Thermal Properties

Latent Heat of Fusion, J/g 260
330
Maximum Temperature: Mechanical, °C 480
1010
Melting Completion (Liquidus), °C 1470
1350
Melting Onset (Solidus), °C 1430
1310
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
9.1
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
60
Density, g/cm3 7.9
8.1
Embodied Carbon, kg CO2/kg material 1.8
9.9
Embodied Energy, MJ/kg 23
140
Embodied Water, L/kg 62
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
190
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
250
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
23
Strength to Weight: Bending, points 18 to 20
21
Thermal Diffusivity, mm2/s 11
2.3
Thermal Shock Resistance, points 14 to 17
19

Alloy Composition

Aluminum (Al), % 0
2.5 to 4.0
Carbon (C), % 0.050 to 0.15
0 to 0.15
Chromium (Cr), % 2.8 to 3.3
27 to 31
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 94.4 to 96
2.5 to 6.0
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
53.3 to 67.5
Niobium (Nb), % 0
0.5 to 2.5
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
0 to 1.0