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EN 1.7725 Steel vs. EN 1.8515 Steel

Both EN 1.7725 steel and EN 1.8515 steel are iron alloys. 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 1.7725 steel and the bottom bar is EN 1.8515 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
340
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
11
Fatigue Strength, MPa 390 to 550
580
Impact Strength: V-Notched Charpy, J 34 to 35
29
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
1130
Tensile Strength: Yield (Proof), MPa 610 to 860
940

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
470
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 39
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
3.5
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
60

Common Calculations

PREN (Pitting Resistance) 2.8
4.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
2310
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29 to 35
40
Strength to Weight: Bending, points 25 to 28
31
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 24 to 29
33

Alloy Composition

Carbon (C), % 0.27 to 0.34
0.28 to 0.35
Chromium (Cr), % 1.3 to 1.7
2.8 to 3.3
Iron (Fe), % 95.7 to 97.5
94.7 to 96.5
Manganese (Mn), % 0.6 to 1.0
0.4 to 0.7
Molybdenum (Mo), % 0.3 to 0.5
0.3 to 0.5
Nickel (Ni), % 0
0 to 0.3
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