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EN 1.7231 Steel vs. EN 1.7703 Steel

Both EN 1.7231 steel and EN 1.7703 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.7231 steel and the bottom bar is EN 1.7703 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240 to 280
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 12
20
Fatigue Strength, MPa 360 to 500
320 to 340
Impact Strength: V-Notched Charpy, J 28 to 30
46
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Tensile Strength: Ultimate (UTS), MPa 790 to 930
670 to 690
Tensile Strength: Yield (Proof), MPa 570 to 800
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
460
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
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 7.3
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
4.2
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
2.5
Embodied Energy, MJ/kg 20
35
Embodied Water, L/kg 51
61

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 100
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 870 to 1700
570 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 28 to 33
24
Strength to Weight: Bending, points 24 to 27
22
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 23 to 27
19 to 20

Alloy Composition

Carbon (C), % 0.38 to 0.45
0.11 to 0.15
Chromium (Cr), % 0.8 to 1.2
2.0 to 2.5
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 96.4 to 98.1
94.6 to 96.4
Manganese (Mn), % 0.6 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0.15 to 0.3
0.9 to 1.1
Nickel (Ni), % 0
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0 to 0.025
0 to 0.015
Silicon (Si), % 0 to 0.6
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0.25 to 0.35