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EN 1.7779 Steel vs. SAE-AISI 1141 Steel

Both EN 1.7779 steel and SAE-AISI 1141 steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 31 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 EN 1.7779 steel and the bottom bar is SAE-AISI 1141 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
210 to 220
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
11 to 17
Fatigue Strength, MPa 430
270 to 430
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 500
460 to 480
Tensile Strength: Ultimate (UTS), MPa 810
740 to 810
Tensile Strength: Yield (Proof), MPa 660
400 to 700

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 470
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
51
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
10
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
12

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.4
Embodied Energy, MJ/kg 41
19
Embodied Water, L/kg 64
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
86 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
430 to 1290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
26 to 29
Strength to Weight: Bending, points 25
23 to 25
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 23
24 to 26

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.17 to 0.23
0.37 to 0.45
Chromium (Cr), % 3.0 to 3.3
0
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 93.8 to 95.4
97.7 to 98.2
Manganese (Mn), % 0.3 to 0.5
1.4 to 1.7
Molybdenum (Mo), % 0.5 to 0.6
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.010
0.080 to 0.13
Vanadium (V), % 0.45 to 0.55
0