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EN 1.7366 Steel vs. EN 1.7725 Steel

Both EN 1.7366 steel and EN 1.7725 steel are iron alloys. They have a very high 96% 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 1.7366 steel and the bottom bar is EN 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 210
250 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17 to 19
14
Fatigue Strength, MPa 160 to 320
390 to 550
Impact Strength: V-Notched Charpy, J 38
34 to 35
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Tensile Strength: Ultimate (UTS), MPa 460 to 710
830 to 1000
Tensile Strength: Yield (Proof), MPa 230 to 480
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 510
440
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 40
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
2.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.8
Embodied Energy, MJ/kg 23
24
Embodied Water, L/kg 69
54

Common Calculations

PREN (Pitting Resistance) 6.8
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 110
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 600
980 to 1940
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 16 to 25
29 to 35
Strength to Weight: Bending, points 17 to 23
25 to 28
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 13 to 20
24 to 29

Alloy Composition

Carbon (C), % 0 to 0.18
0.27 to 0.34
Chromium (Cr), % 4.0 to 6.0
1.3 to 1.7
Iron (Fe), % 91.9 to 95.3
95.7 to 97.5
Manganese (Mn), % 0.3 to 0.8
0.6 to 1.0
Molybdenum (Mo), % 0.45 to 0.65
0.3 to 0.5
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0
0.050 to 0.15

Comparable Variants