Aluminum Bronze

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.

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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

 

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