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EN 1.6957 Steel vs. EN 1.8866 Steel

Both EN 1.6957 steel and EN 1.8866 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a moderately high 95% of their average alloy composition in common. There are 32 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 EN 1.6957 steel and the bottom bar is EN 1.8866 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 18
25
Fatigue Strength, MPa 530
260
Impact Strength: V-Notched Charpy, J 71
67
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 570
350
Tensile Strength: Ultimate (UTS), MPa 930
540
Tensile Strength: Yield (Proof), MPa 780
350

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 450
410
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 47
48
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
2.4
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.1
1.6
Embodied Energy, MJ/kg 29
21
Embodied Water, L/kg 60
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1630
330
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33
19
Strength to Weight: Bending, points 27
19
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 27
16

Alloy Composition

Boron (B), % 0
0 to 0.0050
Carbon (C), % 0.22 to 0.32
0 to 0.16
Chromium (Cr), % 1.2 to 1.8
0 to 0.3
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 92.7 to 94.7
96.3 to 100
Manganese (Mn), % 0.15 to 0.4
0 to 1.5
Molybdenum (Mo), % 0.25 to 0.45
0 to 0.25
Nickel (Ni), % 3.4 to 4.0
0 to 0.5
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.010
0 to 0.025
Silicon (Si), % 0 to 0.15
0 to 0.4
Sulfur (S), % 0 to 0.0070
0 to 0.010
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0.050 to 0.15
0 to 0.060
Zirconium (Zr), % 0
0 to 0.050