Aluminum Bronze Alloys
Aluminum Bronzes are copper-base alloys containing 6% to 12% aluminum and varying amounts of iron, nickel, manganese and/or silicon alloying additions that provide a broad range of mechanical properties – from high ductility to the high-strength levels of high-tensile manganese bronze.
As dramatically different properties can be brought about by comparatively small changes in chemical composition, it is important that producers fully understand that the consistency and reliability of aluminum bronze products can be maintained only by close control of chemical composition and manufacturing methods.
C95200, C95300, C95400, C95500, C95800
The family of aluminum bronze alloys offers high strength and hardness, excellent corrosion resistance, good wearing qualities and good fatigue resistance. The alloys are well suited for service at elevated temperatures.
Foundry practice for aluminum bronze must be carefully controlled. The elimination of oxide inclusions is one of the principal problems. Agitation of the metal, whether in the furnace or during casting, can lead to harmful results.
|Typical Bronze & Brass Alloys||…||…||Suitability for being joined by:||…||…||…||Typical Mechanical Properties||…||…|
|CA#||Ingot #||Previous Trade Name||Alloy Name||Nominal Composition||ASTM||Federal||Former Federal||Military||Approx. Weight, lb./in.3||Soldering||Brazing||Castability (Ranked 1-8, 1 is the best or highest)||Fluidity (Ranked 1-8, 1 is the best or highest)||Machinability Rating (Free Cutting Brass = 100)||Tensile Strength, ksi||Yield Strength, ksi||Elongation, Percentage in 2 in.||Shear Strength, ksi||Fatigue Strength (100 million cycles), ksi||Brinell Hardness (500-kg Load) *(3000-kg Load)||Shrinkage Allowance||Pattern Maker's Shrinkage|
|952||415A||Ampco A1||Aluminum Bronze||88-3-9||B30, B148, B271, B505||QQ-B-675, QQ-C-390||QQ-B-671, QQ-C-390||MIL-C-22887, MIL-C-22229||0.276||Good||Good||8||5||50||80||27||35||40||22||110*||1.60%||2%|
|953||415B||Ampco B2||Aluminum Bronze||89-1-10||B30, B148, B271, B505||QQ-B-675, QQ-C-390||QQ-B-671, QQ-C-390||MIL-C-11866, QQ-C-390||0.272||Good||Good||8||5||55||70-85||30-35||20-35||…||…||110-160*||1.60%||1.60%|
|954||415C||Ampco C3||Aluminum Bronze||85-4-11||B30, B148, B271, B505||QQ-B-675, QQ-C-390||QQ-B-671, QQ-C-390||MIL-C-11866, MIL-C-15345||0.269||Good||Good||8||5||60||85||35||18||47||28||175*||1.60%||1.60%|
|955||415||Ampco D4||Aluminum Bronze||81-4-4-11||B30, B148, B271, B505||QQ-B-675, QQ-C-390||QQ-B-671, QQ-C-390||MIL-C-11866, MIL-C-15345, MIL-C-22087, MIL-C-22229||0.272||Good||Good||8||5||50||95||50||5||…||31||195*||1.60%||1.60%|
|958||415||…||Aluminum Bronze||81-4-5-9-1Mn||B30, B148, B271, B505||QQ-B-675, QQ-C-390||QQ-C-390||MIL-C-15345, MIL-B-21230, MIL-C-22229, MIL-B-24480||0.276||Good||Good||8||5||50||85||35||15||…||33||160-180*||1.60%||1.60%|
|Typical Bronze & Brass Alloys|
|CA#||Ingot #||Previous Trade Name||Alloy Name||Nominal Composition||Applications|
|952||415A||Ampco A1||Aluminum Bronze||88-3-9||Acid-resisting pumps, bearings, bushings, gears, valve seats, guides, plungers, pump rods, nonsparking hardware|
|953||415B||Ampco B2||Aluminum Bronze||89-1-10||Pickling baskets, nuts, gears, steel mill slippers, marine equipment, welding jaws, non-sparking hardware|
|954||415C||Ampco C3||Aluminum Bronze||85-4-11||Pump impellers, bearings, gears, worms, bushings, valve seats and guides, rolling mill slippers, slides, nonsparking hardware|
|955||415||Ampco D4||Aluminum Bronze||81-4-4-11||A heavy duty, dense, high-strength alloy, with hardness equal to that of manganese bronze, and excellent resistance to corrosion and fatigue. Has good wearing qualitites for elevated temperature uses. For gun slides and mountings, for worm wheels and gears, valve seats, bearings and bushings, propeller blades and hubs, liners, and bearing plates subjected to heavy loads, and shaft sleeves in highly stressed shafting.|
|958||415||…||Aluminum Bronze||81-4-5-9-1Mn||Propeller blades and hubs for fresh and salt water service, fittings, gears, worm wheels, valve guides and seals, structural applications|