Gunmetal Casting Alloy – LG2/CC491K/B62

LG2/CC491K/B62 Gunmetal Casting Alloy

ASTM B62 (or UNS C83600) alloy is a leaded red brass copper casting (gunmetal) alloy. Gunmetal alloys are useful for many applications because of their combination of high strength in tension and compression, hardness, ductility and high resistance to impact. It has very good castability and this allows for consistent thin sections which makes the alloy also suitable for intricate parts. This gunmetal also has very good thermal and electrical conductivity. Machinability of B62 is also excellent as the high lead content gives fine turnings with a light cutting load and very good machining characteristics.

The alloy is particularly useful for fluid handling and underwater applications because of its high tensile strength and its resistance to corrosion.

The main limitations of B62 are its limited high temperature use and poor weldability.

B62 ASTM Chemical Composition

%

Copper 84.0-86.0

Zinc 4.0-6.0

Tin 4.0-6.0

Lead 4.0-6.0

Silicon 0.005 max

Phosphorous 0.005 max

Iron 0.03 max

Sulphur 0.08 max

Antimony 0.25 max

Nickel 1.0 max

Aluminium 0.005 max

B62 Mechanical Properties

Tensile Strength 255Mpa

Hardness, Brinell 60

Elongation at break 30.0%

LG2 BS 1400 Chemical Composition

%

Copper max

Zinc max

Magnesium max

Lead max

Silicon

Tin max

Iron

Titanium max

Manganese max

Nickel max

Aluminium

LG2 Mechanical Properties

Tensile Strength Mpa

Hardness, Brinell

Elongation at break %