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EN 1.7703 Steel vs. EN 1.7366 Steel

Both EN 1.7703 steel and EN 1.7366 steel are iron alloys. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.7703 steel and the bottom bar is EN 1.7366 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
140 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
17 to 19
Fatigue Strength, MPa 320 to 340
160 to 320
Impact Strength: V-Notched Charpy, J 46
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Shear Strength, MPa 420 to 430
290 to 440
Tensile Strength: Ultimate (UTS), MPa 670 to 690
460 to 710
Tensile Strength: Yield (Proof), MPa 460 to 500
230 to 480

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 460
510
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
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.2
4.3
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.5
1.7
Embodied Energy, MJ/kg 35
23
Embodied Water, L/kg 61
69

Common Calculations

PREN (Pitting Resistance) 5.6
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
74 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 650
140 to 600
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
16 to 25
Strength to Weight: Bending, points 22
17 to 23
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 19 to 20
13 to 20

Alloy Composition

Carbon (C), % 0.11 to 0.15
0 to 0.18
Chromium (Cr), % 2.0 to 2.5
4.0 to 6.0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 94.6 to 96.4
91.9 to 95.3
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.8
Molybdenum (Mo), % 0.9 to 1.1
0.45 to 0.65
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 0.4
Sulfur (S), % 0 to 0.0050
0 to 0.015
Titanium (Ti), % 0 to 0.030
0
Vanadium (V), % 0.25 to 0.35
0

Comparable Variants