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EN 1.4931 Steel vs. EN 1.8509 Steel

Both EN 1.4931 steel and EN 1.8509 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 88% of their average alloy composition in common. 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 1.4931 steel and the bottom bar is EN 1.8509 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
340
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
11
Fatigue Strength, MPa 410
580
Impact Strength: V-Notched Charpy, J 30
29
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 810
1130
Tensile Strength: Yield (Proof), MPa 620
940

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
440
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
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
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.6
Embodied Energy, MJ/kg 42
22
Embodied Water, L/kg 100
65

Common Calculations

PREN (Pitting Resistance) 16
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 970
2340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
40
Strength to Weight: Bending, points 25
31
Thermal Diffusivity, mm2/s 6.5
10
Thermal Shock Resistance, points 22
33

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0.2 to 0.26
0.38 to 0.45
Chromium (Cr), % 11.3 to 12.2
1.5 to 1.8
Iron (Fe), % 83.2 to 86.8
95.5 to 97.1
Manganese (Mn), % 0.5 to 0.8
0.4 to 0.7
Molybdenum (Mo), % 1.0 to 1.2
0.2 to 0.35
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.020
0 to 0.035
Tungsten (W), % 0 to 0.5
0
Vanadium (V), % 0.25 to 0.35
0