MakeItFrom.com
Menu (ESC)

SAE-AISI 8740 Steel vs. EN 1.6311 Steel

Both SAE-AISI 8740 steel and EN 1.6311 steel are iron alloys. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 1.6311 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
19
Fatigue Strength, MPa 270 to 350
340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 370 to 400
400
Tensile Strength: Ultimate (UTS), MPa 580 to 670
650
Tensile Strength: Yield (Proof), MPa 380 to 570
490

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
410
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
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
2.9
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.6
Embodied Energy, MJ/kg 20
22
Embodied Water, L/kg 50
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 24
23
Strength to Weight: Bending, points 20 to 22
21
Thermal Diffusivity, mm2/s 10
10
Thermal Shock Resistance, points 17 to 20
19

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.15 to 0.23
Chromium (Cr), % 0.4 to 0.6
0 to 0.5
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 96.5 to 97.7
95.9 to 98
Manganese (Mn), % 0.75 to 1.0
1.0 to 1.5
Molybdenum (Mo), % 0.2 to 0.3
0.45 to 0.6
Nickel (Ni), % 0.4 to 0.7
0.4 to 0.8
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.035
Vanadium (V), % 0
0 to 0.020