655 Silicon Bronze Tech Specs

655 High silicon Bronze A Technical Specifications

 

Composition:

	Nominal	Minimum	Maximum
Copper	97%	...	...
Lead	...	...	.05%
Iron	...	...	0.8%
Zinc	...	...	1.5%
Manganese	...	0.5%	1.3%
Silicon	3%	2.8%	3.8%
Nickel	...	...	0.6%

 

Physical Properties:

Melting Point (Liquidus)	1880 F
Melting Point (Solidus)	1780 F
Density	.308 lb / cu in @ 68 F
Specific Gravity	8.53
Coefficient of Thermal Expansion	.0000100 per degree F to 572 F
Thermal Conductivity	21 btu / sq ft / ft / hr / degree F @ 68 F
Electrical Resistivity	148 Ohms @ 68 F
Electrical Conductivity	7.0% IACS @ 68 F
Thermal Capacity (Specific Heat)	09 btu / lb degree F @ 68 F
Modulus of Elasticity (Tension)	15,000 ksi
Modulus of Rigidity	5,600 ksi

 

Typical Uses:

• AIRCRAFT: hydraulic pressure lines
• HARDWARE: bolts, burrs, butts, clamps, cotter pins, hinges, marine hardware, nails, nuts, pole line hardware, screws
• INDUSTRIAL: bearing plates, bushings, cable, channels, chemical equipment, heat exchanger tubes, kettles, piston rings, tanks, rivets, screen cloth and wire, screen plates, shafting
• MARINE: propeller shafts

 

Common Fabrication Processes:

Blanking, drawing, forming and bending, heading and upsetting, hot forging and pressing, roll threading and knurling, shearing, squeezing and swaging

 

Fabrication Properties:

• Capacity for Being Cold Worked: Excellent
• Capacity for Being Hot Formed: Excellent
• Hot Forgeability Rating (Forging Brass = 100): 40
• Hot Working Temperature: 1300-1600 F or 700-875 C
• Annealing Temperature: 900-1300 F or 475-700 C
• Machinability Rating (Free Cutting Brass = 100): 30