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EN 1.8515 Steel vs. EN 1.7380 Steel

Both EN 1.8515 steel and EN 1.7380 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.8515 steel and the bottom bar is EN 1.7380 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 340
160 to 170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
19 to 20
Fatigue Strength, MPa 580
200 to 230
Impact Strength: V-Notched Charpy, J 29
31 to 35
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Shear Strength, MPa 680
330 to 350
Tensile Strength: Ultimate (UTS), MPa 1130
540 to 550
Tensile Strength: Yield (Proof), MPa 940
290 to 330

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 470
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 40
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 3.5
3.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.6
1.8
Embodied Energy, MJ/kg 22
23
Embodied Water, L/kg 60
59

Common Calculations

PREN (Pitting Resistance) 4.4
5.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
87 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 2310
230 to 280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 40
19 to 20
Strength to Weight: Bending, points 31
19
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 33
15 to 16

Alloy Composition

Carbon (C), % 0.28 to 0.35
0.080 to 0.14
Chromium (Cr), % 2.8 to 3.3
2.0 to 2.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 94.7 to 96.5
94.6 to 96.6
Manganese (Mn), % 0.4 to 0.7
0.4 to 0.8
Molybdenum (Mo), % 0.3 to 0.5
0.9 to 1.1
Nickel (Ni), % 0 to 0.3
0
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.035
0 to 0.010