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Nickel 685 vs. ASTM Grade HT Steel

Nickel 685 belongs to the nickel alloys classification, while ASTM grade HT steel belongs to the iron alloys. They have 54% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is nickel 685 and the bottom bar is ASTM grade HT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 350
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
4.6
Fatigue Strength, MPa 470
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 1250
500
Tensile Strength: Yield (Proof), MPa 850
270

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Maximum Temperature: Mechanical, °C 1000
1010
Melting Completion (Liquidus), °C 1380
1390
Melting Onset (Solidus), °C 1330
1340
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 13
12
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 75
31
Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 10
5.4
Embodied Energy, MJ/kg 140
76
Embodied Water, L/kg 340
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
19
Resilience: Unit (Modulus of Resilience), kJ/m3 1820
180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 42
18
Strength to Weight: Bending, points 31
18
Thermal Diffusivity, mm2/s 3.3
3.2
Thermal Shock Resistance, points 37
12

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
0.35 to 0.75
Chromium (Cr), % 18 to 21
15 to 19
Cobalt (Co), % 12 to 15
0
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 0 to 2.0
38.2 to 51.7
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 3.5 to 5.0
0 to 0.5
Nickel (Ni), % 49.6 to 62.5
33 to 37
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Titanium (Ti), % 2.8 to 3.3
0
Zinc (Zn), % 0.020 to 0.12
0