Choosing the wrong bronze grade costs you more than a part. It costs you downtime and rework. At O’Hare Precision Metals, we’ve supplied bronze bar stock to manufacturers across mining, construction, automotive, and chemical processing since 1970.
The two grades that come up most for demanding applications are 673 and 954. Both are strong. Both resist corrosion. But they solve different problems, and knowing the difference helps you spec the right material the first time.
Why Bronze Grade Selection Matters for Demanding Industrial Applications
Bronze is called a Red Metal for a reason. It carries high corrosion resistance and tough strength in one material. That combination makes it reliable in conditions where steel would corrode, and softer alloys would deform under load.
The problem is that bronze is not one grade. Picking between 673 and 954 changes how your part holds up over time. Load capacity, wear resistance, and surface performance all shift depending on which grade you specify.
673 Manganese Bronze: The Right Call When Load Is the Primary Demand
673 is manganese bronze. Its main characteristic is high strength, which makes it the right fit for parts under sustained mechanical load. Bushings, gears, and bearing components are common applications.
If your design carries serious compressive or tensile stress and wear is a secondary concern, 673 is where to start. It gives you the strength to handle the load without overengineering the material selection.
954 Aluminum Bronze: When Your Part Faces Load and Wear at the Same Time
954 is aluminum bronze. It carries both high strength and wear resistance, which sets it apart from 673. Mining equipment, pump components, and valve seats are typical fits because these parts face load and abrasive contact together.
When metal-on-metal contact or sliding friction is part of your operating condition, 954 handles it where 673 may not. If both demands are present, 954 is the more precise choice.
How Precision Grinding Improves Bronze Component Performance
Starting with precision-ground bar stock changes the outcome of your machined parts. We centerless grind bronze bar to tolerances up to .0001 inches with a surface finish of 8 micro inches or better. That starting dimension holds across the full run.
Our grinding capacity runs up to 9 inches in diameter and 50 feet in length. Our specialized division handles up to 7 inches in diameter and 24 feet in length. Quality control inspections run at each phase of production.
Complementary Services Available for Bronze Bar Orders
Beyond ground bar supply, we handle polishing, saw cutting, burnishing, chamfering, turning, and custom machining in-house. Our CNC saws cut up to 7 inches in diameter to custom dimensional requirements using cold saw blades that produce cleaner ends than bandsawing.
Burnishing applies compressive residual stress, closes surface porosity, and combats fatigue failure on cylindrical and conical workpieces. Polishing removes oxidation and inhibits corrosion using centerless polishing cells, bar and tube polishers, and buffing cells.
Get the Right Bronze Grade for Your Application
We stock 673 manganese bronze and 954 aluminum bronze with precision grinding available. We are ISO 9001:2015 certified with quality control inspections at every production phase. Our team is ready to help you match the right grade to your exact application requirements.
Call us at (847) 640-6050, email sales@ohareprecision.com, or submit your specs through the Request a Quote form at ohareprecision.com. We’re available Monday through Friday, 9:00 AM to 5:00 PM CST.
Frequently Asked Questions
What is the difference between 673 and 954 bronze?
673 manganese bronze is suited to high-load applications. 954 aluminum bronze adds wear resistance, making it the right fit when load and abrasive contact occur together.
Do you supply precision-ground bronze bar stock?
Yes. We grind bronze bar to .0001 inch tolerance with a surface finish of 8 micro inches or better, up to 9 inches in diameter and 50 feet in length.
What services are available for bronze bar orders?
O’Hare Precision Metals offers polishing, saw cutting, burnishing, chamfering, turning, custom machining, and packaging. All services are performed in-house.
Is O’Hare Precision Metals ISO certified?
Yes. We are ISO 9001:2015 certified with quality control inspections running at each phase of our operation.