Aluminum Bronze Alloy Properties
Aluminum bronze refers to a group of copper alloys that contain aluminum as the primary alloying element, typically ranging from 5% to 12%. Other elements, such as iron, nickel or manganese, may be added to enhance mechanical properties. Known for its gold-like appearance and high durability, this alloy is widely used in many applications.
At Warner Brothers Foundry Company, we specialize in aluminum bronze casting using air-set sand molding to produce high-integrity, non-ferrous castings for critical industries.
Properties and Characteristics
One of the key reasons aluminum bronze is selected for high-performance parts is its balance of mechanical strength and corrosion resistance. The aluminum bronze melting point typically ranges from 1,915°F to 1,940°F, depending on the specific alloy blend. Its high tensile strength and fatigue resistance make it ideal for components subjected to stress and harsh environments.
Additional advantages include:
- Excellent resistance to oxidation, even at high temperatures.
- Low magnetic permeability, ensuring non-sparking in explosive environments.
- Strong resistance to saltwater corrosion.
- Superior galling and wear resistance.
Warner Brothers Foundry Company guarantees the integrity of each casting by using X-ray inspection methods in place of magnetic particle testing, which does not apply to non-ferrous materials. This non-destructive technique helps us meet or exceed ASTM B30 and ASTM B26/B26M specifications for aluminum and copper-base alloys.
Applications of Aluminum Bronze
Aluminum bronze material is commonly found in:
- Pump and valve components
- Marine hardware and propellers
- Bearings and bushings
- Aerospace and defense systems
- Heavy industrial machinery
Because aluminum bronze casting delivers excellent surface finish and tight dimensional control, it’s a reliable choice for prototyping and full production runs. At Warner Brothers Foundry, we use air-set sand molding to ensure maximum casting stability and consistency, which reduces costly rework.
Why Choose Warner Brothers for Aluminum Bronze Castings?
Our process and craftsmanship set us apart. As a full-service, family-run foundry, we’ve built a reputation for delivering precision-engineered castings on time and to spec. We serve industries that can’t afford failure, including defense contractors and energy producers. As a result, our team takes pride in doing the job right the first time.
We support you with:
- Custom alloy consultations.
- On-time delivery of high-quality castings.
- Proven quality standards backed by internal testing.
- Free replacement of any casting with a verified defect.
We perform non-destructive testing on all critical components and certify materials to applicable ASTM standards. Our in-house expertise and rapid turnaround times make us a trusted partner in non-ferrous sand castings, prototype castings and large-scale cast products.
C95200, C95300, C95400, C95500, C95800
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.
Explore our charts below to get a full understanding of various aluminum bronze properties, hardness measurements, tensile strength, and applications for use.
Aluminum Bronze Composition
| 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 | |||||
Download Aluminum Bronze Casting Specs
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