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EN 1.4931 Steel vs. EN 1.6750 Steel

Both EN 1.4931 steel and EN 1.6750 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 88% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4931 steel and the bottom bar is EN 1.6750 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
18
Fatigue Strength, MPa 410
310
Impact Strength: V-Notched Charpy, J 30
46
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 810
650
Tensile Strength: Yield (Proof), MPa 620
460

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
420
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 24
39
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.8
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 11
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
3.3
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.9
1.7
Embodied Energy, MJ/kg 42
22
Embodied Water, L/kg 100
52

Common Calculations

PREN (Pitting Resistance) 16
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
110
Resilience: Unit (Modulus of Resilience), kJ/m3 970
570
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29
23
Strength to Weight: Bending, points 25
21
Thermal Diffusivity, mm2/s 6.5
10
Thermal Shock Resistance, points 22
19

Alloy Composition

Carbon (C), % 0.2 to 0.26
0.17 to 0.23
Chromium (Cr), % 11.3 to 12.2
0.3 to 0.5
Iron (Fe), % 83.2 to 86.8
95.3 to 97.5
Manganese (Mn), % 0.5 to 0.8
0.8 to 1.2
Molybdenum (Mo), % 1.0 to 1.2
0.4 to 0.8
Nickel (Ni), % 0 to 1.0
0.8 to 1.2
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.6
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0 to 0.5
0
Vanadium (V), % 0.25 to 0.35
0