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EN 1.7703 Steel vs. EN 1.7725 Steel

Both EN 1.7703 steel and EN 1.7725 steel are iron alloys. They have a very high 98% 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 1.7703 steel and the bottom bar is EN 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
250 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
14
Fatigue Strength, MPa 320 to 340
390 to 550
Impact Strength: V-Notched Charpy, J 46
34 to 35
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Tensile Strength: Ultimate (UTS), MPa 670 to 690
830 to 1000
Tensile Strength: Yield (Proof), MPa 460 to 500
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 460
440
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 4.2
2.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.5
1.8
Embodied Energy, MJ/kg 35
24
Embodied Water, L/kg 61
54

Common Calculations

PREN (Pitting Resistance) 5.6
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 650
980 to 1940
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
29 to 35
Strength to Weight: Bending, points 22
25 to 28
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 19 to 20
24 to 29

Alloy Composition

Carbon (C), % 0.11 to 0.15
0.27 to 0.34
Chromium (Cr), % 2.0 to 2.5
1.3 to 1.7
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 94.6 to 96.4
95.7 to 97.5
Manganese (Mn), % 0.3 to 0.6
0.6 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0.3 to 0.5
Nickel (Ni), % 0 to 0.25
0
Niobium (Nb), % 0 to 0.070
0
Nitrogen (N), % 0 to 0.012
0
Phosphorus (P), % 0 to 0.015
0 to 0.025
Silicon (Si), % 0 to 0.1
0 to 0.6
Sulfur (S), % 0 to 0.0050
0 to 0.030
Titanium (Ti), % 0 to 0.030
0
Vanadium (V), % 0.25 to 0.35
0.050 to 0.15