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ASTM A356 Grade 9 vs. ASTM Grade LC2-1 Steel

Both ASTM A356 grade 9 and ASTM grade LC2-1 steel are iron alloys. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is ASTM A356 grade 9 and the bottom bar is ASTM grade LC2-1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
240
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
20
Fatigue Strength, MPa 310
430
Poisson's Ratio 0.29
0.29
Reduction in Area, % 50
34
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 670
810
Tensile Strength: Yield (Proof), MPa 460
630

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Maximum Temperature: Mechanical, °C 440
450
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
46
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 3.6
5.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.4
1.9
Embodied Energy, MJ/kg 33
25
Embodied Water, L/kg 56
60

Common Calculations

PREN (Pitting Resistance) 4.7
3.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
150
Resilience: Unit (Modulus of Resilience), kJ/m3 570
1040
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
29
Strength to Weight: Bending, points 22
25
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 19
24

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.22
Chromium (Cr), % 1.0 to 1.5
1.4 to 1.9
Iron (Fe), % 95.2 to 97.2
92.5 to 95.3
Manganese (Mn), % 0.5 to 0.9
0.55 to 0.75
Molybdenum (Mo), % 0.9 to 1.2
0.3 to 0.6
Nickel (Ni), % 0
2.5 to 3.5
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.2 to 0.6
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.045
Vanadium (V), % 0.2 to 0.35
0