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EN 1.7725 Steel vs. EN 1.8505 Steel

Both EN 1.7725 steel and EN 1.8505 steel are iron alloys. Their average alloy composition is basically identical. 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 1.7725 steel and the bottom bar is EN 1.8505 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
320
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
13
Fatigue Strength, MPa 390 to 550
540
Impact Strength: V-Notched Charpy, J 34 to 35
28
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
1050
Tensile Strength: Yield (Proof), MPa 610 to 860
860

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
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 39
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.6
Embodied Energy, MJ/kg 24
22
Embodied Water, L/kg 54
65

Common Calculations

PREN (Pitting Resistance) 2.8
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
1950
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 35
37
Strength to Weight: Bending, points 25 to 28
30
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 24 to 29
31

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0.27 to 0.34
0.28 to 0.35
Chromium (Cr), % 1.3 to 1.7
1.5 to 1.8
Iron (Fe), % 95.7 to 97.5
95.4 to 97.1
Manganese (Mn), % 0.6 to 1.0
0.4 to 0.7
Molybdenum (Mo), % 0.3 to 0.5
0.2 to 0.4
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), % 0.050 to 0.15
0