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ASTM Grade LC9 (J31300) Cast Nickel Steel

ASTM grade LC9 steel is an alloy steel formulated for casting. Cited properties are appropriate for the quenched and tempered condition. LC9 is the ASTM designation for this material. J31300 is the UNS number.

It has a very high base cost among cast alloy steels. In addition, it has a very high electrical conductivity and a fairly high embodied energy.

The graph bars on the material properties cards below compare ASTM grade LC9 steel to: cast alloy steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Brinell Hardness

200

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

22 %

Fatigue Strength

420 MPa 60 x 103 psi

Poisson's Ratio

0.29

Reduction in Area

34 %

Shear Modulus

73 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

660 MPa 95 x 103 psi

Tensile Strength: Yield (Proof)

590 MPa 85 x 103 psi

Thermal Properties

Latent Heat of Fusion

260 J/g

Maximum Temperature: Mechanical

430 °C 810 °F

Melting Completion (Liquidus)

1450 °C 2650 °F

Melting Onset (Solidus)

1410 °C 2570 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

8.9 % IACS

Electrical Conductivity: Equal Weight (Specific)

10 % IACS

Otherwise Unclassified Properties

Base Metal Price

8.0 % relative

Density

7.9 g/cm3 500 lb/ft3

Embodied Carbon

2.3 kg CO2/kg material

Embodied Energy

31 MJ/kg 13 x 103 BTU/lb

Embodied Water

65 L/kg 7.7 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

140 MJ/m3

Resilience: Unit (Modulus of Resilience)

920 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

23 points

Strength to Weight: Bending

21 points

Thermal Shock Resistance

20 points

Alloy Composition

Among cast alloy steels, the composition of ASTM grade LC9 steel is notable for including copper (Cu) and vanadium (V). Copper is used to improve corrosion resistance, and to add at least some degree of precipitation hardenability. Vanadium has a strong hardening effect, but this effect is particularly sensitive to the type of tempering.

Iron (Fe) 87.4 to 91.5
Nickel (Ni) 8.5 to 10
Manganese (Mn) 0 to 0.9
Chromium (Cr) 0 to 0.5
Silicon (Si) 0 to 0.45
Copper (Cu) 0 to 0.3
Molybdenum (Mo) 0 to 0.2
Carbon (C) 0 to 0.13
Sulfur (S) 0 to 0.045
Phosphorus (P) 0 to 0.040
Vanadium (V) 0 to 0.030

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM A352: Standard Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing Parts, Suitable for Low-Temperature Service

Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011

Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005

Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008

Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015