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Nickel 625 vs. ACI-ASTM CH20 Steel

Nickel 625 belongs to the nickel alloys classification, while ACI-ASTM CH20 steel belongs to the iron alloys. They have a modest 38% 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 ACI-ASTM CH20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 33 to 34
38
Fatigue Strength, MPa 240 to 320
290
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 790 to 910
610
Tensile Strength: Yield (Proof), MPa 320 to 450
350

Thermal Properties

Latent Heat of Fusion, J/g 330
310
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1350
1410
Melting Onset (Solidus), °C 1290
1430
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 11
14
Thermal Expansion, µm/m-K 13
15

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
20
Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 14
3.7
Embodied Energy, MJ/kg 190
53
Embodied Water, L/kg 290
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
200
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
300
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 29
22
Strength to Weight: Bending, points 22 to 24
21
Thermal Diffusivity, mm2/s 2.9
3.7
Thermal Shock Resistance, points 22 to 25
15

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0 to 0.2
Chromium (Cr), % 20 to 23
22 to 26
Cobalt (Co), % 0 to 1.0
0
Iron (Fe), % 0 to 5.0
54.7 to 66
Manganese (Mn), % 0 to 0.5
0 to 1.5
Molybdenum (Mo), % 8.0 to 10
0 to 0.5
Nickel (Ni), % 58 to 68.9
12 to 15
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