Bronze Bar Stock

What is bronze?

Bronze is a copper-based alloy used in engineering for bearings, bushings, valve components, wear plates and precision parts. It machines cleanly, resists corrosion, has good wear characteristics and — in some grades — is self-lubricating. AIMS Industrial stocks bronze bar stock in round, hexagonal and flat profiles, supplied in phosphor bronze, leaded bronze, aluminium bronze and silicon bronze grades.

What are the main bronze alloy grades?

Phosphor bronze (C93200 / SAE 660) is the standard engineering bronze for bearings and bushings. Leaded bronze has higher lead content for improved machinability and embedded lubricity. Aluminium bronze offers higher strength and is preferred for marine and high-load applications. Silicon bronze is used where weldability and corrosion resistance are needed together.

What is bronze used for?

Bronze is used for plain bearings, bushings, valve bodies, gears, marine fittings, electrical hardware and wear plates. It is also chosen for non-sparking tools in environments where flammable vapour or dust is present.

Bronze Bar Stock — Quick Reference (Alloy Grades)

Bronze bar stock is the workshop material for bearings, bushings, valve components, wear plates + precision parts requiring corrosion resistance, low friction, dimensional stability. Selection turns on alloy grade matched to service: phosphor (general bearing), aluminium (high-strength), silicon (machinability), lead (free-cutting).

Profile types: Round (most common — bearings/bushings turned to size) | Hex (workshop tooling + spanner-grippable parts) | Flat (wear plates + shims). Self-lubricating bronze: oil-impregnated PB and SAE 841 sintered bronze — pre-loaded with oil at manufacture, lubricates at running temperature. Critical: bronze alloys vary 10× in cost — match grade to application. Companion: raw materials, key steel, tool steels, bushings.

Bronze Bar Stock

Bronze bar stock is a machining material widely used for manufacturing plain bearings, bushings, valve components, wear plates, and precision parts where corrosion resistance, low friction, and dimensional stability are required. Unlike ferrous materials, bronze machines cleanly, has self-lubricating properties in some alloy grades, and performs well in applications involving sliding contact, marine exposure, or corrosive environments. AIMS Industrial supplies bronze bar stock in round, hexagonal, and flat profiles to workshops and machine shops across Australia.

Bronze Alloy Grades

Different bronze alloys are suited to different service conditions. The most common grades used in engineering applications are:

• Phosphor bronze (C93200 / SAE 660): The standard engineering bronze for bearing and bushing manufacture. Excellent machinability, good load capacity, and strong corrosion resistance. The go-to grade for general bearing applications where plain bearings are being made to order.
• Leaded bronze: Higher lead content improves machinability and provides enhanced embedded lubricity. Suited to applications with intermittent lubrication or where the bearing will run with minimal lubricant film.
• Aluminium bronze: Higher strength and excellent corrosion resistance — particularly in marine and saline environments. Used for marine hardware, pump components, and high-load bearing applications where standard phosphor bronze lacks sufficient strength.
• Silicon bronze: Good weldability and corrosion resistance. Used in marine fastener and fitting manufacture where a weldable bronze is required.

Available Profiles

AIMS supplies bronze bar in the three most practical profiles for machining operations. Round bar is the standard starting material for bearing and bushing manufacture — the round cross-section minimises material waste when turning to size. Hex bar suits production of bolt-on components, valve parts, and hydraulic fittings where wrench flats are required. Flat bar suits wear strips, slide plates, and components machined from a flat profile.

Cutting and Machining

Bronze machines excellently with HSS and carbide tooling. Sharp tools, adequate cutting fluid, and positive rake angles produce clean finishes with minimal burring. Bronze is non-sparking, which is an advantage when machining in environments where flammable dust or vapour may be present. Material can be cut to length from stock bar using a bandsaw or cold saw — power hacksaws can be used for lighter cuts but produce a rougher finish that requires more machining allowance.

Order Bronze Bar from AIMS Industrial

AIMS Industrial supplies bronze bar stock to machine shops, maintenance workshops, and engineering facilities across Australia. We can cut to approximate length for your job. For sizing advice, alloy selection, or bulk orders, contact our team and we will help you get the right material for your application.

People Also Ask — Bronze Bars and Bushing Material

Q: What bronze does AIMS stock?

AIMS stocks bronze bar stock and pre-machined bushing material in standard alloys: SAE 660 (C932 leaded tin bronze — workshop standard for bushing applications), SAE 841 (oil-impregnated bronze for sintered bearings), aluminium bronze (high-strength, corrosion-resistant), and continuous-cast bronze (premium quality for machined parts). Available in rod, hexagon bar, square bar, and pre-machined bushings. Used for: bearing bushings, wear plates, valve seats, electrical applications, and any bronze-machined component. See [Bronze Bush & Plain Bearing Guide](/blogs/product-guides/bronze-bush-plain-bearing-guide).

Q: SAE 660 vs SAE 841 bronze?

SAE 660 (C932 tin bronze with lead): general workshop bushing material — good machinability, moderate strength, lead content provides self-lubrication. Workshop standard for traditional bushings. SAE 841 (oil-impregnated bronze): sintered powder metallurgy bronze impregnated with oil — provides self-lubrication via the embedded oil. Used in sintered bearings, light-duty applications. For solid bushings machined to size: SAE 660. For sintered sleeve bearings: SAE 841.

Q: What size bronze rod for bushing machining?

Choose rod OD slightly larger than the bushing finished OD (typically +3-5mm for machining allowance). For a 25mm finished bushing OD: order 28-30mm rod. Bore (ID) is then machined to size. For pre-machined bushings (saving lathe work), AIMS stocks common sizes like 12×16, 16×20, 20×25, 25×32, 30×38 etc. (ID×OD in mm). For custom sizes, machine from rod stock or order from supplier.

Q: How do I machine bronze?

Bronze machines easily with sharp HSS or carbide tools, moderate speeds (typically 60-100 m/min surface speed for SAE 660), light feeds. Use plenty of coolant (light cutting oil or water-soluble). Bronze produces continuous chips that can wrap around tools — use chip-breaker geometry or interrupted feed. SAE 660 with leaded composition can produce vapours when machined hot — adequate ventilation important. Bronze is the easiest non-ferrous metal to machine — beginner-friendly.

Q: When do I use bronze vs steel for bushings?

Bronze: self-lubricating with grease or oil film, doesn't gall against shafts, suits sliding bearing applications where rolling bearings aren't practical, lower noise than ball bearings. Standard for slow-speed plain bearings, agricultural pivot bushings, automotive king pin bushings, oscillating joints. Steel bushings: higher load capacity but require positive lubrication (oil film) and don't tolerate boundary lubrication well. For slow-speed sliding applications: bronze. For high-load high-speed: rolling bearings. See [Linear Bearing Guide](/blogs/product-guides/linear-bearing-guide).