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Nickel 689 vs. SAE-AISI A7 Steel

Nickel 689 belongs to the nickel alloys classification, while SAE-AISI A7 steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is nickel 689 and the bottom bar is SAE-AISI A7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
72
Tensile Strength: Ultimate (UTS), MPa 1250
800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 330
260
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 70
10
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 11
13
Embodied Energy, MJ/kg 150
200
Embodied Water, L/kg 330
100

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 41
29 to 77
Strength to Weight: Bending, points 30
25 to 48
Thermal Shock Resistance, points 35
27 to 72

Alloy Composition

Aluminum (Al), % 0.75 to 1.3
0
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0.1 to 0.2
2.0 to 2.9
Chromium (Cr), % 18 to 20
5.0 to 5.8
Cobalt (Co), % 9.0 to 11
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 5.0
81.4 to 87.7
Manganese (Mn), % 0 to 0.5
0 to 0.8
Molybdenum (Mo), % 9.0 to 10.5
0.9 to 1.4
Nickel (Ni), % 48.3 to 60.9
0 to 0.3
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 2.3 to 2.8
0
Tungsten (W), % 0
0.5 to 1.5
Vanadium (V), % 0
3.9 to 5.2