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SAE-AISI 8660 Steel vs. EN 1.0031 Steel

Both SAE-AISI 8660 steel and EN 1.0031 steel are iron alloys. Both are furnished in the cold worked (strain hardened) condition. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI 8660 steel and the bottom bar is EN 1.0031 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
89
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12
28
Fatigue Strength, MPa 340
160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 390
200
Tensile Strength: Ultimate (UTS), MPa 660
310
Tensile Strength: Yield (Proof), MPa 550
210

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
53
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
18
Embodied Water, L/kg 50
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 73
78
Resilience: Unit (Modulus of Resilience), kJ/m3 800
120
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
11
Strength to Weight: Bending, points 21
13
Thermal Diffusivity, mm2/s 10
14
Thermal Shock Resistance, points 19
9.8

Alloy Composition

Carbon (C), % 0.56 to 0.64
0 to 0.1
Chromium (Cr), % 0.4 to 0.6
0
Iron (Fe), % 96.4 to 97.6
98.8 to 100
Manganese (Mn), % 0.75 to 1.0
0 to 0.7
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.4 to 0.7
0
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0 to 0.35
Sulfur (S), % 0 to 0.040
0 to 0.045