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EN 1.5681 Steel vs. ASTM Grade LC9 Steel

Both EN 1.5681 steel and ASTM grade LC9 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 95% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.5681 steel and the bottom bar is ASTM grade LC9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
22
Fatigue Strength, MPa 300
420
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 630
660
Tensile Strength: Yield (Proof), MPa 430
590

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 420
430
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
10

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
8.0
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.9
2.3
Embodied Energy, MJ/kg 25
31
Embodied Water, L/kg 55
65

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
140
Resilience: Unit (Modulus of Resilience), kJ/m3 490
920
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
23
Strength to Weight: Bending, points 21
21
Thermal Shock Resistance, points 19
20

Alloy Composition

Carbon (C), % 0.060 to 0.12
0 to 0.13
Chromium (Cr), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 92.9 to 94.9
87.4 to 91.5
Manganese (Mn), % 0.5 to 0.8
0 to 0.9
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 4.5 to 5.5
8.5 to 10
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 0.45
Sulfur (S), % 0 to 0.020
0 to 0.045
Vanadium (V), % 0
0 to 0.030