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SAE-AISI 8645 Steel vs. EN 1.8879 Steel

Both SAE-AISI 8645 steel and EN 1.8879 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 (2, 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 1.8879 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 200
250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 23
16
Fatigue Strength, MPa 280 to 350
460
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 380 to 400
510
Tensile Strength: Ultimate (UTS), MPa 600 to 670
830
Tensile Strength: Yield (Proof), MPa 390 to 560
710

Thermal Properties

Latent Heat of Fusion, J/g 250
260
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
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
3.7
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.9
Embodied Energy, MJ/kg 20
26
Embodied Water, L/kg 50
54

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 840
1320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 24
29
Strength to Weight: Bending, points 20 to 22
25
Thermal Diffusivity, mm2/s 10
11
Thermal Shock Resistance, points 18 to 20
24

Alloy Composition

Boron (B), % 0
0 to 0.0050
Carbon (C), % 0.43 to 0.48
0 to 0.2
Chromium (Cr), % 0.4 to 0.6
0 to 1.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 96.5 to 97.7
91.9 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 2.5
Niobium (Nb), % 0
0 to 0.060
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.010
Titanium (Ti), % 0
0 to 0.050
Vanadium (V), % 0
0 to 0.12
Zirconium (Zr), % 0
0 to 0.15