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SAE-AISI 8740 Steel vs. EN 2.4889 Nickel

SAE-AISI 8740 steel belongs to the iron alloys classification, while EN 2.4889 nickel belongs to the nickel alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is EN 2.4889 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 23
39
Fatigue Strength, MPa 270 to 350
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 370 to 400
490
Tensile Strength: Ultimate (UTS), MPa 580 to 670
720
Tensile Strength: Yield (Proof), MPa 380 to 570
270

Thermal Properties

Latent Heat of Fusion, J/g 250
350
Maximum Temperature: Mechanical, °C 410
1200
Melting Completion (Liquidus), °C 1460
1350
Melting Onset (Solidus), °C 1420
1300
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
13
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
42
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.5
6.9
Embodied Energy, MJ/kg 20
98
Embodied Water, L/kg 50
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
180
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 24
25
Strength to Weight: Bending, points 20 to 22
22
Thermal Diffusivity, mm2/s 10
3.4
Thermal Shock Resistance, points 17 to 20
19

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.050 to 0.12
Cerium (Ce), % 0
0.030 to 0.090
Chromium (Cr), % 0.4 to 0.6
26 to 29
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 96.5 to 97.7
21 to 25
Manganese (Mn), % 0.75 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 0.4 to 0.7
45 to 50.4
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0.15 to 0.35
2.5 to 3.0
Sulfur (S), % 0 to 0.040
0 to 0.010