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SAE-AISI 8740 Steel vs. EN 1.8891 Steel

Both SAE-AISI 8740 steel and EN 1.8891 steel are iron alloys. They have a very high 99% of their average alloy composition in common. 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 1.8891 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
19
Fatigue Strength, MPa 270 to 350
330
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 370 to 400
380
Tensile Strength: Ultimate (UTS), MPa 580 to 670
610
Tensile Strength: Yield (Proof), MPa 380 to 570
480

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
46
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
2.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.7
Embodied Energy, MJ/kg 20
24
Embodied Water, L/kg 50
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
630
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 24
22
Strength to Weight: Bending, points 20 to 22
20
Thermal Diffusivity, mm2/s 10
12
Thermal Shock Resistance, points 17 to 20
18

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.060
Carbon (C), % 0.38 to 0.43
0 to 0.2
Chromium (Cr), % 0.4 to 0.6
0 to 0.3
Copper (Cu), % 0
0 to 0.7
Iron (Fe), % 96.5 to 97.7
95.2 to 99
Manganese (Mn), % 0.75 to 1.0
1.0 to 1.7
Molybdenum (Mo), % 0.2 to 0.3
0 to 0.1
Nickel (Ni), % 0.4 to 0.7
0 to 0.8
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.025
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0 to 0.2