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EN 1.8509 Steel vs. EN 1.7380 Steel

Both EN 1.8509 steel and EN 1.7380 steel are iron alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.8509 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 73
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 440
460
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 39
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
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 65
59

Common Calculations

PREN (Pitting Resistance) 2.6
5.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
87 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 2340
230 to 280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 40
19 to 20
Strength to Weight: Bending, points 31
19
Thermal Diffusivity, mm2/s 10
11
Thermal Shock Resistance, points 33
15 to 16

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Carbon (C), % 0.38 to 0.45
0.080 to 0.14
Chromium (Cr), % 1.5 to 1.8
2.0 to 2.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 95.5 to 97.1
94.6 to 96.6
Manganese (Mn), % 0.4 to 0.7
0.4 to 0.8
Molybdenum (Mo), % 0.2 to 0.35
0.9 to 1.1
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