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EN 1.7379 Steel vs. EN 1.8503 Steel

Both EN 1.7379 steel and EN 1.8503 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 99% 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 1.7379 steel and the bottom bar is EN 1.8503 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
16
Fatigue Strength, MPa 320
600
Impact Strength: V-Notched Charpy, J 45
39
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Tensile Strength: Ultimate (UTS), MPa 670
1000
Tensile Strength: Yield (Proof), MPa 460
910

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 460
440
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
41
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
3.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
2.3
Embodied Energy, MJ/kg 23
33
Embodied Water, L/kg 59
57

Common Calculations

PREN (Pitting Resistance) 5.7
3.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
150
Resilience: Unit (Modulus of Resilience), kJ/m3 550
2200
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
35
Strength to Weight: Bending, points 22
28
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 19
29

Alloy Composition

Aluminum (Al), % 0
0 to 0.3
Carbon (C), % 0.13 to 0.2
0.16 to 0.24
Chromium (Cr), % 2.0 to 2.5
1.2 to 1.5
Iron (Fe), % 94.5 to 96.5
95.8 to 97.5
Manganese (Mn), % 0.5 to 0.9
0.4 to 0.8
Molybdenum (Mo), % 0.9 to 1.2
0.65 to 0.8
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.6
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035
Vanadium (V), % 0
0.25 to 0.35