Difference Between Phosphorous Bronze and Silicon Bronze

Phosphorous Bronze

Phosphorous Bronze alloy usually has a tin content ranging from 0.5% to 1.0%, and a Phosphorous  content range of 0.01% to 0.35%. These alloys are noteworthy for their toughness, strength, low coefficient of friction, high fatigue resistance, and fine grain.  The tin content increases the corrosion resistance and tensile strength, while the Phosphorous content increases the wear resistance and stiffness. Some typical end uses for this product would be electrical products, bellows, springs, washers, corrosion-resistant equipment. 

Typical uses in following sectors:-

Architecture:-Bridge bearing plates

1. Fasteners:-Fasteners, cotter pins, lock washers
2. Industrial:-Bourdon tubes, bellows, perforated sheets, chemical hardware, truss wire, springs, sleeve bushing, diaphragms, clutch disks, pressure responsive elements, beater bar, textile machinery, welding rods
3. Electrical:-Resistance wire, fuse clips, electromechanical spring components, electrical flexing contact blades, electrical connectors, electronic connectors, wire brushes, switch parts, electronic and precision instrument parts.

Silicon Bronze

Silicon Bronze is an alloy that can cover both brass and bronze (red silicon brasses and red silicon bronzes). They typically contain 20% zinc and 6% silicon. Red brass has high strength and corrosion resistance and is commonly used for valve stems. Red bronze is very similar but it has lower concentrations of zinc. It is commonly used in the manufacturing of pump and valve components.

Typical uses in the following sectors:-

1. ELECTRICAL: conduit, pole line hardware, motor, rotor bars
2. FASTENERS: bolts, cable clamps, cap screws, machine screws, nuts, rivets, u bolts, fasteners, screws
3. INDUSTRIAL: oil refinery plumbing tube, heat exchanger tube, welding rod, hydraulic pressure lines
4. MARINE: hardware

Source: http://www.supermetalind.com