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SAE-AISI 1140 Steel vs. EN 1.7706 Steel

Both SAE-AISI 1140 steel and EN 1.7706 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1140 steel and the bottom bar is EN 1.7706 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14 to 18
17
Fatigue Strength, MPa 230 to 370
330
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 600 to 700
690
Tensile Strength: Yield (Proof), MPa 340 to 570
500

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 400
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 51
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
3.7
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
2.3
Embodied Energy, MJ/kg 18
32
Embodied Water, L/kg 46
57

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 93
110
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
670
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 25
24
Strength to Weight: Bending, points 20 to 22
22
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 18 to 21
20

Alloy Composition

Carbon (C), % 0.37 to 0.44
0.15 to 0.2
Chromium (Cr), % 0
1.2 to 1.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 98.4 to 98.9
94.7 to 97.1
Manganese (Mn), % 0.7 to 1.0
0.5 to 0.9
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0
0 to 0.6
Sulfur (S), % 0.080 to 0.13
0 to 0.015
Vanadium (V), % 0
0.2 to 0.3