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ASTM A387 Grade 21 Steel vs. Nickel 242

ASTM A387 grade 21 steel belongs to the iron alloys classification, while nickel 242 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 242.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 21
45
Fatigue Strength, MPa 160 to 250
300
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 74
84
Shear Strength, MPa 310 to 370
570
Tensile Strength: Ultimate (UTS), MPa 500 to 590
820
Tensile Strength: Yield (Proof), MPa 230 to 350
350

Thermal Properties

Latent Heat of Fusion, J/g 260
330
Maximum Temperature: Mechanical, °C 480
930
Melting Completion (Liquidus), °C 1470
1380
Melting Onset (Solidus), °C 1430
1290
Specific Heat Capacity, J/kg-K 470
400
Thermal Conductivity, W/m-K 41
11
Thermal Expansion, µm/m-K 13
11

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
75
Density, g/cm3 7.9
9.0
Embodied Carbon, kg CO2/kg material 1.8
14
Embodied Energy, MJ/kg 23
180
Embodied Water, L/kg 62
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
300
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 18 to 21
25
Strength to Weight: Bending, points 18 to 20
21
Thermal Diffusivity, mm2/s 11
3.1
Thermal Shock Resistance, points 14 to 17
25

Alloy Composition

Aluminum (Al), % 0
0 to 0.5
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0.050 to 0.15
0 to 0.030
Chromium (Cr), % 2.8 to 3.3
7.0 to 9.0
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 94.4 to 96
0 to 2.0
Manganese (Mn), % 0.3 to 0.6
0 to 0.8
Molybdenum (Mo), % 0.9 to 1.1
24 to 26
Nickel (Ni), % 0
59.3 to 69
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.8
Sulfur (S), % 0 to 0.025
0 to 0.015