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Nickel 625 vs. ASTM Grade HF Steel

Nickel 625 belongs to the nickel alloys classification, while ASTM grade HF steel belongs to the iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 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 nickel 625 and the bottom bar is ASTM grade HF steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 33 to 34
29
Fatigue Strength, MPa 240 to 320
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 790 to 910
550
Tensile Strength: Yield (Proof), MPa 320 to 450
270

Thermal Properties

Latent Heat of Fusion, J/g 330
300
Maximum Temperature: Mechanical, °C 980
1000
Melting Completion (Liquidus), °C 1350
1410
Melting Onset (Solidus), °C 1290
1370
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 11
16
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 80
17
Density, g/cm3 8.6
7.7
Embodied Carbon, kg CO2/kg material 14
3.2
Embodied Energy, MJ/kg 190
46
Embodied Water, L/kg 290
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
130
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
180
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 29
20
Strength to Weight: Bending, points 22 to 24
19
Thermal Diffusivity, mm2/s 2.9
4.2
Thermal Shock Resistance, points 22 to 25
12

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0.2 to 0.4
Chromium (Cr), % 20 to 23
18 to 23
Cobalt (Co), % 0 to 1.0
0
Iron (Fe), % 0 to 5.0
60 to 73.8
Manganese (Mn), % 0 to 0.5
0 to 2.0
Molybdenum (Mo), % 8.0 to 10
0 to 0.5
Nickel (Ni), % 58 to 68.9
8.0 to 12
Niobium (Nb), % 3.2 to 4.2
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.040
Titanium (Ti), % 0 to 0.4
0