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SAE-AISI 8660 Steel vs. EN 1.0215 Steel

Both SAE-AISI 8660 steel and EN 1.0215 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 1.0215 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
100
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12
25
Fatigue Strength, MPa 340
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 390
230
Tensile Strength: Ultimate (UTS), MPa 660
350
Tensile Strength: Yield (Proof), MPa 550
250

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
Melting Completion (Liquidus), °C 1450
1460
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
79
Resilience: Unit (Modulus of Resilience), kJ/m3 800
160
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
13
Strength to Weight: Bending, points 21
14
Thermal Diffusivity, mm2/s 10
14
Thermal Shock Resistance, points 19
11

Alloy Composition

Carbon (C), % 0.56 to 0.64
0 to 0.14
Chromium (Cr), % 0.4 to 0.6
0
Iron (Fe), % 96.4 to 97.6
98.7 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