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SAE-AISI 4118 Steel vs. EN 1.6956 Steel

Both SAE-AISI 4118 steel and EN 1.6956 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 (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4118 steel and the bottom bar is EN 1.6956 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
370
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
9.6
Fatigue Strength, MPa 230
680
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 320
730
Tensile Strength: Ultimate (UTS), MPa 500
1230
Tensile Strength: Yield (Proof), MPa 320
1120

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
440
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 46
46
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
5.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
2.2
Embodied Energy, MJ/kg 20
31
Embodied Water, L/kg 49
60

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
110
Resilience: Unit (Modulus of Resilience), kJ/m3 280
3320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
43
Strength to Weight: Bending, points 18
32
Thermal Diffusivity, mm2/s 13
12
Thermal Shock Resistance, points 15
36

Alloy Composition

Carbon (C), % 0.18 to 0.23
0.28 to 0.38
Chromium (Cr), % 0.4 to 0.6
1.0 to 1.7
Iron (Fe), % 97.5 to 98.4
92.4 to 95.3
Manganese (Mn), % 0.7 to 0.9
0.15 to 0.4
Molybdenum (Mo), % 0.2 to 0.3
0.3 to 0.6
Nickel (Ni), % 0
2.9 to 3.8
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.035
Vanadium (V), % 0
0.080 to 0.25