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EN 1.6957 Steel vs. EN 1.8918 Steel

Both EN 1.6957 steel and EN 1.8918 steel are iron alloys. 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 1.8918 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 18
19
Fatigue Strength, MPa 530
330
Impact Strength: V-Notched Charpy, J 71
88
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 570
400
Tensile Strength: Ultimate (UTS), MPa 930
640
Tensile Strength: Yield (Proof), MPa 780
490

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 450
400
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
46
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
2.5
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.1
1.7
Embodied Energy, MJ/kg 29
24
Embodied Water, L/kg 60
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1630
640
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33
23
Strength to Weight: Bending, points 27
21
Thermal Diffusivity, mm2/s 13
12
Thermal Shock Resistance, points 27
19

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.050
Carbon (C), % 0.22 to 0.32
0 to 0.2
Chromium (Cr), % 1.2 to 1.8
0 to 0.3
Copper (Cu), % 0
0 to 0.7
Iron (Fe), % 92.7 to 94.7
95.2 to 98.9
Manganese (Mn), % 0.15 to 0.4
1.1 to 1.7
Molybdenum (Mo), % 0.25 to 0.45
0 to 0.1
Nickel (Ni), % 3.4 to 4.0
0 to 0.8
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.025
Phosphorus (P), % 0 to 0.010
0 to 0.020
Silicon (Si), % 0 to 0.15
0 to 0.6
Sulfur (S), % 0 to 0.0070
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0.050 to 0.15
0 to 0.2