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EN 1.1127 Steel vs. SAE-AISI 1078 Steel

Both EN 1.1127 steel and SAE-AISI 1078 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.1127 steel and the bottom bar is SAE-AISI 1078 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 230
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14 to 25
11 to 14
Fatigue Strength, MPa 280 to 370
270 to 350
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 420 to 480
440 to 470
Tensile Strength: Ultimate (UTS), MPa 660 to 790
730 to 780
Tensile Strength: Yield (Proof), MPa 410 to 580
430 to 570

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 49
49
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 19
18
Embodied Water, L/kg 49
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 140
77 to 90
Resilience: Unit (Modulus of Resilience), kJ/m3 440 to 880
490 to 860
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 28
26 to 28
Strength to Weight: Bending, points 22 to 24
23 to 24
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 21 to 25
25 to 26

Alloy Composition

Carbon (C), % 0.34 to 0.42
0.72 to 0.85
Chromium (Cr), % 0 to 0.4
0
Iron (Fe), % 96.6 to 98.1
98.5 to 99
Manganese (Mn), % 1.4 to 1.7
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.035
0 to 0.050