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EN 1.7378 Steel vs. EN 1.7383 Steel

Both EN 1.7378 steel and EN 1.7383 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.7378 steel and the bottom bar is EN 1.7383 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
170 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
20 to 23
Fatigue Strength, MPa 330
210 to 270
Impact Strength: V-Notched Charpy, J 38
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Shear Strength, MPa 430
350 to 380
Tensile Strength: Ultimate (UTS), MPa 700
560 to 610
Tensile Strength: Yield (Proof), MPa 490
300 to 400

Thermal Properties

Latent Heat of Fusion, J/g 260
260
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
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
3.9
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.3
1.8
Embodied Energy, MJ/kg 33
23
Embodied Water, L/kg 61
59

Common Calculations

PREN (Pitting Resistance) 5.8
5.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 630
240 to 420
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25
20 to 22
Strength to Weight: Bending, points 22
19 to 20
Thermal Diffusivity, mm2/s 10
11
Thermal Shock Resistance, points 20
16 to 18

Alloy Composition

Aluminum (Al), % 0 to 0.020
0 to 0.040
Boron (B), % 0.0015 to 0.0070
0
Carbon (C), % 0.050 to 0.1
0.080 to 0.15
Chromium (Cr), % 2.2 to 2.6
2.0 to 2.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 94.6 to 96.1
94.3 to 96.6
Manganese (Mn), % 0.3 to 0.7
0.4 to 0.8
Molybdenum (Mo), % 0.9 to 1.1
0.9 to 1.1
Nickel (Ni), % 0
0 to 0.3
Nitrogen (N), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0.15 to 0.45
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0.050 to 0.1
0
Vanadium (V), % 0.2 to 0.3
0