Gunmetal Casting Alloy – LG2 (CC491K/B62/C83600)

General Information 

ASTM B62, also known as UNS C83600, represents a premium leaded red brass copper casting alloy renowned for its exceptional properties. This gunmetal alloy boasts high tensile and compressive strength, hardness, ductility, and remarkable resistance to impact, making it an ideal choice for various applications. Its superior castability allows for the creation of consistent thin sections, perfect for intricate parts across different industries.

Additionally, gunmetal exhibits excellent thermal and electrical conductivity, enhancing its utility in diverse applications. With outstanding machinability, B62 alloy produces fine turnings with minimal cutting load, ensuring precision in machining operations. Despite its numerous advantages, B62 does have limitations, including restricted high-temperature usage and poor weldability. Nonetheless, its exceptional qualities make it a preferred choice for applications where reliability and performance are paramount.

LG2 CC491K Gunmetal Casting

Typical Applications

LG2 gunmetal castings, known for their exceptional properties, find a wide array of applications across industries. Commonly used in marine engineering, LG2 castings are utilized for manufacturing propellers, fittings, and marine engine components due to their excellent corrosion resistance and high strength. Additionally, they are favored in architectural applications for decorative fixtures and ornamental elements, benefiting from their aesthetic appeal and durability. In the automotive sector, LG2 gunmetal castings are employed for various components such as valve guides and bearings, where their robustness and wear resistance are highly valued. Furthermore, LG2 castings are utilized in the production of pump components for their ability to withstand abrasive environments and high pressures. With their versatility and reliability, LG2 gunmetal castings continue to be a preferred choice for industries requiring durable and high-performance components.

B62 Chemical Composition

Copper (Cu)84.0 -86.0 %
Zinc (Zn)4.0 – 6.0
Tin (Sn)4.0 – 6.0
Lead (Pb)4.0 – 6.0
Silicon (Si)0.005 max
Phosphophorous (P)0.005 max
Iron (Fe)0.03 max
Sulphur (S)0.08 max
Antimony (Sb)0.25 max
Nickel (Ni)1.0 max
Aluminium (Al)0.005 max

B62 Mechanical Properties

Tensile Strength in Mpa205 min
Yield Strength in Mpa95 min
Elongation %20 min

LG2 Chemical Composition

Tin (Sn)4.0 – 6.0%
Nickel (Ni)1.0
Zinc (Zn)4.0 – 6.0
Lead (Pb)4.0 – 6.0
Copper (Cu)Remainder

LG2 Mechanical Properties

Tensile Strength (N/mm2)185
Elongation (%)12
Impact Resistance Charpy (ft lbf)19
Brinell Hardness55-65
Modulus of Elasticity (lbs/m2 x 106)11