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EN 1.6773 Steel vs. EN 1.7725 Steel

Both EN 1.6773 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 1.6773 steel and the bottom bar is EN 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 340
250 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
14
Fatigue Strength, MPa 560
390 to 550
Impact Strength: V-Notched Charpy, J 38
34 to 35
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 1120
830 to 1000
Tensile Strength: Yield (Proof), MPa 910
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 450
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 46
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 9.2
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
2.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.9
1.8
Embodied Energy, MJ/kg 26
24
Embodied Water, L/kg 61
54

Common Calculations

PREN (Pitting Resistance) 3.0
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 2210
980 to 1940
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 40
29 to 35
Strength to Weight: Bending, points 30
25 to 28
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 33
24 to 29

Alloy Composition

Carbon (C), % 0.32 to 0.39
0.27 to 0.34
Chromium (Cr), % 1.6 to 2.0
1.3 to 1.7
Iron (Fe), % 92 to 93.9
95.7 to 97.5
Manganese (Mn), % 0.3 to 0.6
0.6 to 1.0
Molybdenum (Mo), % 0.25 to 0.45
0.3 to 0.5
Nickel (Ni), % 3.6 to 4.1
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0
0.050 to 0.15