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SAE-AISI 8645 Steel vs. EN 1.8875 Steel

Both SAE-AISI 8645 steel and EN 1.8875 steel are iron alloys. Their average alloy composition is basically identical. 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 8645 steel and the bottom bar is EN 1.8875 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 200
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 23
19
Fatigue Strength, MPa 280 to 350
340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 380 to 400
410
Tensile Strength: Ultimate (UTS), MPa 600 to 670
660
Tensile Strength: Yield (Proof), MPa 390 to 560
490

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
420
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
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
3.2
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.8
Embodied Energy, MJ/kg 20
24
Embodied Water, L/kg 50
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 840
650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 24
23
Strength to Weight: Bending, points 20 to 22
21
Thermal Diffusivity, mm2/s 10
10
Thermal Shock Resistance, points 18 to 20
19

Alloy Composition

Boron (B), % 0
0 to 0.0050
Carbon (C), % 0.43 to 0.48
0 to 0.18
Chromium (Cr), % 0.4 to 0.6
0 to 1.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 96.5 to 97.7
93.6 to 100
Manganese (Mn), % 0.75 to 1.0
0 to 1.7
Molybdenum (Mo), % 0.15 to 0.25
0 to 0.7
Nickel (Ni), % 0.4 to 0.7
0 to 1.5
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0.15 to 0.35
0 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.0080
Titanium (Ti), % 0
0 to 0.050
Vanadium (V), % 0
0 to 0.080
Zirconium (Zr), % 0
0 to 0.15