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SAE-AISI 8740 Steel vs. EN 2.4856 Nickel

SAE-AISI 8740 steel belongs to the iron alloys classification, while EN 2.4856 nickel belongs to the nickel alloys.

For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is EN 2.4856 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
210
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 23
28
Fatigue Strength, MPa 270 to 350
280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
79
Shear Strength, MPa 370 to 400
570
Tensile Strength: Ultimate (UTS), MPa 580 to 670
880
Tensile Strength: Yield (Proof), MPa 380 to 570
430

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Maximum Temperature: Mechanical, °C 410
1000
Melting Completion (Liquidus), °C 1460
1480
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 39
10
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
80
Density, g/cm3 7.8
8.6
Embodied Carbon, kg CO2/kg material 1.5
14
Embodied Energy, MJ/kg 20
190
Embodied Water, L/kg 50
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
200
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
440
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 20 to 24
28
Strength to Weight: Bending, points 20 to 22
24
Thermal Diffusivity, mm2/s 10
2.7
Thermal Shock Resistance, points 17 to 20
29

Alloy Composition

Aluminum (Al), % 0
0 to 0.4
Carbon (C), % 0.38 to 0.43
0.030 to 0.1
Chromium (Cr), % 0.4 to 0.6
20 to 23
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 96.5 to 97.7
0 to 5.0
Manganese (Mn), % 0.75 to 1.0
0 to 0.5
Molybdenum (Mo), % 0.2 to 0.3
8.0 to 10
Nickel (Ni), % 0.4 to 0.7
58 to 68.8
Niobium (Nb), % 0
3.2 to 4.2
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
0 to 0.4