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EN 1.6750 Steel vs. EN 1.6311 Steel

Both EN 1.6750 steel and EN 1.6311 steel are iron alloys. Both are furnished in the quenched and tempered condition. Their average alloy composition is basically identical. There are 32 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 1.6750 steel and the bottom bar is EN 1.6311 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 18
19
Fatigue Strength, MPa 310
340
Impact Strength: V-Notched Charpy, J 46
51
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 650
650
Tensile Strength: Yield (Proof), MPa 460
490

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
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 39
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.3
2.9
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.7
1.6
Embodied Energy, MJ/kg 22
22
Embodied Water, L/kg 52
51

Common Calculations

PREN (Pitting Resistance) 2.4
2.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 570
650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
23
Strength to Weight: Bending, points 21
21
Thermal Diffusivity, mm2/s 10
10
Thermal Shock Resistance, points 19
19

Alloy Composition

Carbon (C), % 0.17 to 0.23
0.15 to 0.23
Chromium (Cr), % 0.3 to 0.5
0 to 0.5
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 95.3 to 97.5
95.9 to 98
Manganese (Mn), % 0.8 to 1.2
1.0 to 1.5
Molybdenum (Mo), % 0.4 to 0.8
0.45 to 0.6
Nickel (Ni), % 0.8 to 1.2
0.4 to 0.8
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.6
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035
Vanadium (V), % 0
0 to 0.020