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Nickel 825 vs. SAE-AISI H25 Steel

Nickel 825 belongs to the nickel alloys classification, while SAE-AISI H25 steel belongs to the iron alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is nickel 825 and the bottom bar is SAE-AISI H25 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
79
Tensile Strength: Ultimate (UTS), MPa 650
710 to 1620

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1400
1750
Melting Onset (Solidus), °C 1370
1700
Specific Heat Capacity, J/kg-K 460
420
Thermal Conductivity, W/m-K 11
26
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 41
38
Density, g/cm3 8.2
9.1
Embodied Carbon, kg CO2/kg material 7.2
6.2
Embodied Energy, MJ/kg 100
93
Embodied Water, L/kg 230
83

Common Calculations

PREN (Pitting Resistance) 31
29
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 22
22 to 50
Strength to Weight: Bending, points 20
20 to 34
Thermal Diffusivity, mm2/s 2.9
6.7
Thermal Shock Resistance, points 17
22 to 49

Alloy Composition

Aluminum (Al), % 0 to 0.2
0
Carbon (C), % 0 to 0.050
0.22 to 0.32
Chromium (Cr), % 19.5 to 23.5
3.8 to 4.5
Copper (Cu), % 1.5 to 3.0
0 to 0.25
Iron (Fe), % 22 to 37.9
77.2 to 81.3
Manganese (Mn), % 0 to 1.0
0.15 to 0.4
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 38 to 46
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.050
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0.6 to 1.2
0
Tungsten (W), % 0
14 to 16
Vanadium (V), % 0
0.4 to 0.6