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EN 1.5918 +AC+C Steel vs. EN 1.6571 +AC+C Steel

Both EN 1.5918 +AC+C steel and EN 1.6571 +AC+C steel are iron alloys. Both are furnished in the spheroidized and cold-drawn condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.5918 +AC+C steel and the bottom bar is EN 1.6571 +AC+C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
11
Fatigue Strength, MPa 300
310
Poisson's Ratio 0.29
0.29
Reduction in Area, % 64
63
Shear Modulus, GPa 73
73
Shear Strength, MPa 370
380
Tensile Strength: Ultimate (UTS), MPa 620
640
Tensile Strength: Yield (Proof), MPa 480
500

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
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 43
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
3.4
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.6
1.7
Embodied Energy, MJ/kg 21
22
Embodied Water, L/kg 56
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65
67
Resilience: Unit (Modulus of Resilience), kJ/m3 610
650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
23
Strength to Weight: Bending, points 21
21
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 18
19

Alloy Composition

Carbon (C), % 0.14 to 0.2
0.16 to 0.23
Chromium (Cr), % 1.4 to 1.7
0.6 to 0.9
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 94.9 to 96.6
95.3 to 97.1
Manganese (Mn), % 0.5 to 0.9
0.5 to 0.9
Molybdenum (Mo), % 0
0.25 to 0.35
Nickel (Ni), % 1.4 to 1.7
1.4 to 1.7
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.3
0 to 0.3
Sulfur (S), % 0 to 0.025
0.020 to 0.040