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EN 1.7703 Steel vs. EN 1.7767 Steel

Both EN 1.7703 steel and EN 1.7767 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.7703 steel and the bottom bar is EN 1.7767 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
20
Fatigue Strength, MPa 320 to 340
320 to 340
Impact Strength: V-Notched Charpy, J 46
46
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Shear Strength, MPa 420 to 430
420 to 430
Tensile Strength: Ultimate (UTS), MPa 670 to 690
670 to 690
Tensile Strength: Yield (Proof), MPa 460 to 500
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 460
480
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1430
1430
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 7.6
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.2
4.5
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.5
2.4
Embodied Energy, MJ/kg 35
33
Embodied Water, L/kg 61
64

Common Calculations

PREN (Pitting Resistance) 5.6
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 650
570 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
24
Strength to Weight: Bending, points 22
22
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 19 to 20
19 to 20

Alloy Composition

Carbon (C), % 0.11 to 0.15
0.1 to 0.15
Chromium (Cr), % 2.0 to 2.5
2.8 to 3.3
Copper (Cu), % 0 to 0.2
0 to 0.25
Iron (Fe), % 94.6 to 96.4
93.8 to 95.8
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.9 to 1.1
Nickel (Ni), % 0 to 0.25
0 to 0.25
Niobium (Nb), % 0 to 0.070
0 to 0.070
Nitrogen (N), % 0 to 0.012
0 to 0.012
Phosphorus (P), % 0 to 0.015
0 to 0.015
Silicon (Si), % 0 to 0.1
0 to 0.15
Sulfur (S), % 0 to 0.0050
0 to 0.0050
Titanium (Ti), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.25 to 0.35
0.2 to 0.3

Comparable Variants