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Nickel 685 vs. SAE-AISI H12 Steel

Nickel 685 belongs to the nickel alloys classification, while SAE-AISI H12 steel belongs to the iron alloys. There are 21 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 685 and the bottom bar is SAE-AISI H12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 1250
690 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1380
1480
Melting Onset (Solidus), °C 1330
1440
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 13
36
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 75
9.0
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 10
2.9
Embodied Energy, MJ/kg 140
41
Embodied Water, L/kg 340
76

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 42
24 to 65
Strength to Weight: Bending, points 31
22 to 42
Thermal Diffusivity, mm2/s 3.3
9.8
Thermal Shock Resistance, points 37
22 to 60

Alloy Composition

Aluminum (Al), % 1.2 to 1.6
0
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0.030 to 0.1
0.3 to 0.4
Chromium (Cr), % 18 to 21
4.8 to 5.5
Cobalt (Co), % 12 to 15
0
Copper (Cu), % 0 to 0.5
0 to 0.25
Iron (Fe), % 0 to 2.0
87.8 to 91.7
Manganese (Mn), % 0 to 1.0
0.2 to 0.5
Molybdenum (Mo), % 3.5 to 5.0
1.3 to 1.8
Nickel (Ni), % 49.6 to 62.5
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.75
0.8 to 1.2
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 2.8 to 3.3
0
Tungsten (W), % 0
1.0 to 1.7
Vanadium (V), % 0
0 to 0.5
Zinc (Zn), % 0.020 to 0.12
0