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EN 1.7380 Steel vs. EN 1.7703 Steel

Both EN 1.7380 steel and EN 1.7703 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.7380 steel and the bottom bar is EN 1.7703 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 170
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19 to 20
20
Fatigue Strength, MPa 200 to 230
320 to 340
Impact Strength: V-Notched Charpy, J 31 to 35
46
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Shear Strength, MPa 330 to 350
420 to 430
Tensile Strength: Ultimate (UTS), MPa 540 to 550
670 to 690
Tensile Strength: Yield (Proof), MPa 290 to 330
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 460
460
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
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
4.2
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.8
2.5
Embodied Energy, MJ/kg 23
35
Embodied Water, L/kg 59
61

Common Calculations

PREN (Pitting Resistance) 5.6
5.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 98
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 230 to 280
570 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 20
24
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 15 to 16
19 to 20

Alloy Composition

Carbon (C), % 0.080 to 0.14
0.11 to 0.15
Chromium (Cr), % 2.0 to 2.5
2.0 to 2.5
Copper (Cu), % 0 to 0.3
0 to 0.2
Iron (Fe), % 94.6 to 96.6
94.6 to 96.4
Manganese (Mn), % 0.4 to 0.8
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.9 to 1.1
Nickel (Ni), % 0
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0 to 0.012
0 to 0.012
Phosphorus (P), % 0 to 0.020
0 to 0.015
Silicon (Si), % 0 to 0.5
0 to 0.1
Sulfur (S), % 0 to 0.010
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0.25 to 0.35

Comparable Variants