IS 1634

IS 1634 refers to nickel aluminium bronze alloys widely used in engineering, known for their high strength, toughness, and corrosion resistance.

Chemical Composition (Typical)

• Copper (Cu): Balance (~77-83%)

• Aluminium (Al): 8-11%

• Nickel (Ni): 4-6%

• Iron (Fe): 2-5%

• Manganese (Mn): Up to 1.5%

• Silicon (Si), Tin (Sn): Trace amounts

Mechanical Properties

• Tensile Strength: Approx. 600 – 750 MPa

• Yield Strength: Approx. 400 – 500 MPa

• Elongation: 10 – 20%

• Hardness: Typically 180 – 220 HV

Physical Properties

• Density: About 7.5 – 7.8 g/cm³

• Good corrosion resistance, particularly in seawater and aggressive environments

• Maintains properties over wide temperature ranges

Applications

• Marine hardware such as pumps and valve components, propeller shafts

• Aerospace and defence component manufacturing

• Chemical processing equipment

• High-strength structural components requiring corrosion resistance

Key Features

• High strength and toughness with excellent corrosion resistance

• Resistant to erosion, cavitation, and wear

• Good machinability and weldability with proper techniques