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EN 1.8515 Steel vs. EN 1.6957 Steel

Both EN 1.8515 steel and EN 1.6957 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 96% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.8515 steel and the bottom bar is EN 1.6957 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 340
280
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
18
Fatigue Strength, MPa 580
530
Impact Strength: V-Notched Charpy, J 29
71
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 680
570
Tensile Strength: Ultimate (UTS), MPa 1130
930
Tensile Strength: Yield (Proof), MPa 940
780

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 470
450
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 40
47
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
5.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.6
2.1
Embodied Energy, MJ/kg 22
29
Embodied Water, L/kg 60
60

Common Calculations

PREN (Pitting Resistance) 4.4
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
160
Resilience: Unit (Modulus of Resilience), kJ/m3 2310
1630
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 40
33
Strength to Weight: Bending, points 31
27
Thermal Diffusivity, mm2/s 11
13
Thermal Shock Resistance, points 33
27

Alloy Composition

Carbon (C), % 0.28 to 0.35
0.22 to 0.32
Chromium (Cr), % 2.8 to 3.3
1.2 to 1.8
Iron (Fe), % 94.7 to 96.5
92.7 to 94.7
Manganese (Mn), % 0.4 to 0.7
0.15 to 0.4
Molybdenum (Mo), % 0.3 to 0.5
0.25 to 0.45
Nickel (Ni), % 0 to 0.3
3.4 to 4.0
Phosphorus (P), % 0 to 0.025
0 to 0.010
Silicon (Si), % 0 to 0.4
0 to 0.15
Sulfur (S), % 0 to 0.035
0 to 0.0070
Vanadium (V), % 0
0.050 to 0.15