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EN 1.4931 Steel vs. EN 1.6579 Steel

Both EN 1.4931 steel and EN 1.6579 steel are iron alloys. 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 1.6579 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
260 to 290
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
11 to 14
Fatigue Strength, MPa 410
380 to 570
Impact Strength: V-Notched Charpy, J 30
35 to 41
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 810
850 to 980
Tensile Strength: Yield (Proof), MPa 620
600 to 910

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
440
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1410
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
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 11
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
3.7
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.7
Embodied Energy, MJ/kg 42
22
Embodied Water, L/kg 100
56

Common Calculations

PREN (Pitting Resistance) 16
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
100 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 970
950 to 2210
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29
30 to 35
Strength to Weight: Bending, points 25
25 to 28
Thermal Diffusivity, mm2/s 6.5
11
Thermal Shock Resistance, points 22
25 to 29

Alloy Composition

Carbon (C), % 0.2 to 0.26
0.32 to 0.38
Chromium (Cr), % 11.3 to 12.2
1.4 to 1.7
Iron (Fe), % 83.2 to 86.8
94.2 to 96.1
Manganese (Mn), % 0.5 to 0.8
0.6 to 1.0
Molybdenum (Mo), % 1.0 to 1.2
0.15 to 0.35
Nickel (Ni), % 0 to 1.0
1.4 to 1.7
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