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Nickel 625 vs. SAE-AISI 81B45 Steel

Nickel 625 belongs to the nickel alloys classification, while SAE-AISI 81B45 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is SAE-AISI 81B45 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 33 to 34
12 to 24
Fatigue Strength, MPa 240 to 320
250 to 350
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 79
73
Shear Strength, MPa 530 to 600
340 to 400
Tensile Strength: Ultimate (UTS), MPa 790 to 910
540 to 670
Tensile Strength: Yield (Proof), MPa 320 to 450
350 to 560

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 980
410
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 11
40
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 80
2.3
Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 14
1.5
Embodied Energy, MJ/kg 190
20
Embodied Water, L/kg 290
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
77 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
320 to 840
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 29
19 to 24
Strength to Weight: Bending, points 22 to 24
19 to 22
Thermal Diffusivity, mm2/s 2.9
11
Thermal Shock Resistance, points 22 to 25
17 to 21

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 0 to 0.1
0.43 to 0.48
Chromium (Cr), % 20 to 23
0.35 to 0.55
Cobalt (Co), % 0 to 1.0
0
Iron (Fe), % 0 to 5.0
97 to 98
Manganese (Mn), % 0 to 0.5
0.75 to 1.0
Molybdenum (Mo), % 8.0 to 10
0.080 to 0.15
Nickel (Ni), % 58 to 68.9
0.2 to 0.4
Niobium (Nb), % 3.2 to 4.2
0
Phosphorus (P), % 0 to 0.015
0 to 0.035
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040
Titanium (Ti), % 0 to 0.4
0

Comparable Variants