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EN 1.7379 Steel vs. EN 1.4931 Steel

Both EN 1.7379 steel and EN 1.4931 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 89% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.7379 steel and the bottom bar is EN 1.4931 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
240
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
17
Fatigue Strength, MPa 320
410
Impact Strength: V-Notched Charpy, J 45
30
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
76
Tensile Strength: Ultimate (UTS), MPa 670
810
Tensile Strength: Yield (Proof), MPa 460
620

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Maximum Temperature: Mechanical, °C 460
600
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
24
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
9.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
11

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
8.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
2.9
Embodied Energy, MJ/kg 23
42
Embodied Water, L/kg 59
100

Common Calculations

PREN (Pitting Resistance) 5.7
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
130
Resilience: Unit (Modulus of Resilience), kJ/m3 550
970
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
29
Strength to Weight: Bending, points 22
25
Thermal Diffusivity, mm2/s 11
6.5
Thermal Shock Resistance, points 19
22

Alloy Composition

Carbon (C), % 0.13 to 0.2
0.2 to 0.26
Chromium (Cr), % 2.0 to 2.5
11.3 to 12.2
Iron (Fe), % 94.5 to 96.5
83.2 to 86.8
Manganese (Mn), % 0.5 to 0.9
0.5 to 0.8
Molybdenum (Mo), % 0.9 to 1.2
1.0 to 1.2
Nickel (Ni), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.6
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0
0 to 0.5
Vanadium (V), % 0
0.25 to 0.35