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Nickel 625 vs. ASTM Grade HK Steel

Nickel 625 belongs to the nickel alloys classification, while ASTM grade HK steel belongs to the iron alloys. They have 45% of their average alloy composition in common. 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 HK steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 33 to 34
11
Fatigue Strength, MPa 240 to 320
150
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 79
79
Tensile Strength: Ultimate (UTS), MPa 790 to 910
500
Tensile Strength: Yield (Proof), MPa 320 to 450
270

Thermal Properties

Latent Heat of Fusion, J/g 330
310
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1350
1400
Melting Onset (Solidus), °C 1290
1350
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 80
25
Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 14
4.4
Embodied Energy, MJ/kg 190
63
Embodied Water, L/kg 290
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
48
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 29
18
Strength to Weight: Bending, points 22 to 24
18
Thermal Diffusivity, mm2/s 2.9
3.9
Thermal Shock Resistance, points 22 to 25
11

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0.2 to 0.6
Chromium (Cr), % 20 to 23
24 to 28
Cobalt (Co), % 0 to 1.0
0
Iron (Fe), % 0 to 5.0
44.8 to 57.8
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
18 to 22
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