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SAE-AISI 8640 Steel vs. EN 1.6368 Steel

Both SAE-AISI 8640 steel and EN 1.6368 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 SAE-AISI 8640 steel and the bottom bar is EN 1.6368 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
18
Fatigue Strength, MPa 270
310 to 330
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 360
410 to 430
Tensile Strength: Ultimate (UTS), MPa 570
660 to 690
Tensile Strength: Yield (Proof), MPa 380
460 to 490

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
410
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
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
3.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.7
Embodied Energy, MJ/kg 20
22
Embodied Water, L/kg 50
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 380
580 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20
23 to 24
Strength to Weight: Bending, points 20
21 to 22
Thermal Diffusivity, mm2/s 10
11
Thermal Shock Resistance, points 17
20

Alloy Composition

Aluminum (Al), % 0
0.015 to 0.040
Carbon (C), % 0.38 to 0.43
0 to 0.17
Chromium (Cr), % 0.4 to 0.6
0 to 0.3
Copper (Cu), % 0
0.5 to 0.8
Iron (Fe), % 96.6 to 97.8
95.1 to 97.2
Manganese (Mn), % 0.75 to 1.0
0.8 to 1.2
Molybdenum (Mo), % 0.15 to 0.25
0.25 to 0.5
Nickel (Ni), % 0.4 to 0.7
1.0 to 1.3
Niobium (Nb), % 0
0.015 to 0.045
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0.25 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.010