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SAE-AISI 8740 Steel vs. EN 1.7710 Steel

Both SAE-AISI 8740 steel and EN 1.7710 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 1.7710 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
280 to 320
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
6.8 to 11
Fatigue Strength, MPa 270 to 350
500 to 620
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 580 to 670
930 to 1070
Tensile Strength: Yield (Proof), MPa 380 to 570
800 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 410
440
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
41
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
3.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
2.2
Embodied Energy, MJ/kg 20
30
Embodied Water, L/kg 50
57

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
73 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
1680 to 2970
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 24
33 to 38
Strength to Weight: Bending, points 20 to 22
27 to 30
Thermal Diffusivity, mm2/s 10
11
Thermal Shock Resistance, points 17 to 20
27 to 31

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.12 to 0.18
Chromium (Cr), % 0.4 to 0.6
1.3 to 1.8
Iron (Fe), % 96.5 to 97.7
95.1 to 97
Manganese (Mn), % 0.75 to 1.0
0.6 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
0.8 to 1.0
Nickel (Ni), % 0.4 to 0.7
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030
Vanadium (V), % 0
0.15 to 0.25

Comparable Variants