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SAE-AISI 8640 Steel vs. EN 1.4864 Stainless Steel

Both SAE-AISI 8640 steel and EN 1.4864 stainless steel are iron alloys. They have 49% 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 8640 steel and the bottom bar is EN 1.4864 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
33
Fatigue Strength, MPa 270
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
75
Shear Strength, MPa 360
430
Tensile Strength: Ultimate (UTS), MPa 570
650
Tensile Strength: Yield (Proof), MPa 380
260

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 410
1100
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1420
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
13
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
30
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.5
5.3
Embodied Energy, MJ/kg 20
75
Embodied Water, L/kg 50
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
170
Resilience: Unit (Modulus of Resilience), kJ/m3 380
170
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20
23
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 10
3.3
Thermal Shock Resistance, points 17
17

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.15
Chromium (Cr), % 0.4 to 0.6
15 to 17
Iron (Fe), % 96.6 to 97.8
41.7 to 51
Manganese (Mn), % 0.75 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.4 to 0.7
33 to 37
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0.15 to 0.35
1.0 to 2.0
Sulfur (S), % 0 to 0.040
0 to 0.015