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ASTM A302 Alloy Steel vs. Nickel 718

ASTM A302 alloy steel belongs to the iron alloys classification, while nickel 718 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is nickel 718.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 23
12 to 50
Fatigue Strength, MPa 250 to 280
460 to 760
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
75
Shear Strength, MPa 370 to 390
660 to 950
Tensile Strength: Ultimate (UTS), MPa 590 to 620
930 to 1530
Tensile Strength: Yield (Proof), MPa 350 to 390
510 to 1330

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 410
980
Melting Completion (Liquidus), °C 1460
1340
Melting Onset (Solidus), °C 1420
1260
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 39 to 51
11
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2 to 7.4
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.4
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
75
Density, g/cm3 7.8 to 7.9
8.3
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
13
Embodied Energy, MJ/kg 20 to 21
190
Embodied Water, L/kg 48 to 50
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
140 to 390
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 410
660 to 4560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 21 to 22
31 to 51
Strength to Weight: Bending, points 20 to 21
25 to 35
Thermal Diffusivity, mm2/s 10 to 14
3.0
Thermal Shock Resistance, points 17 to 18
27 to 44