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SAE-AISI 1140 Steel vs. EN 1.1244 Steel

Both SAE-AISI 1140 steel and EN 1.1244 steel are iron alloys. Their average alloy composition is basically identical. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 1.1244 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
210 to 220
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
72
Tensile Strength: Ultimate (UTS), MPa 600 to 700
730 to 770

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
51
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
19
Embodied Water, L/kg 46
47

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 25
26 to 28
Strength to Weight: Bending, points 20 to 22
23 to 24
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 18 to 21
23 to 25

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Carbon (C), % 0.37 to 0.44
0.65 to 0.75
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 98.4 to 98.9
98.1 to 99.2
Manganese (Mn), % 0.7 to 1.0
0.8 to 1.1
Oxygen (O), % 0
0 to 0.0020
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0
0 to 0.4
Sulfur (S), % 0.080 to 0.13
0 to 0.030