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EN 1.7390 Steel vs. SAE-AISI 1078 Steel

Both EN 1.7390 steel and SAE-AISI 1078 steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 32 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 EN 1.7390 steel and the bottom bar is SAE-AISI 1078 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
11 to 14
Fatigue Strength, MPa 310
270 to 350
Poisson's Ratio 0.29
0.29
Reduction in Area, % 50
34 to 45
Shear Modulus, GPa 74
72
Shear Strength, MPa 440
440 to 470
Tensile Strength: Ultimate (UTS), MPa 710
730 to 780
Tensile Strength: Yield (Proof), MPa 480
430 to 570

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 510
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 40
49
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.4
Embodied Energy, MJ/kg 23
18
Embodied Water, L/kg 69
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
77 to 90
Resilience: Unit (Modulus of Resilience), kJ/m3 600
490 to 860
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
26 to 28
Strength to Weight: Bending, points 23
23 to 24
Thermal Diffusivity, mm2/s 11
13
Thermal Shock Resistance, points 20
25 to 26

Alloy Composition

Carbon (C), % 0 to 0.18
0.72 to 0.85
Chromium (Cr), % 4.0 to 6.0
0
Iron (Fe), % 91.9 to 95.3
98.5 to 99
Manganese (Mn), % 0.3 to 0.8
0.3 to 0.6
Molybdenum (Mo), % 0.45 to 0.65
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0
Sulfur (S), % 0 to 0.015
0 to 0.050