Supplier Guidance
Need a U.S. material match for CuSn10-C?
CuSn10-C is a high-tin bronze callout. Public cross-reference data points first toward ASTM C90500 / SAE 62; C90300 is a nearby U.S. Navy G bronze and should only be considered after drawing review.
Use this page to start the sourcing conversation, then send the drawing, dimensions, quantity, and operating conditions so the final material can be checked before production.
Equivalent at a Glance
Engineering Check
Material Data to Review Before Quoting
This table gives your engineering, purchasing, or quality team a fast way to compare the source callout with the U.S. material starting point. It supports RFQ review; it does not replace the approved drawing or material specification.
| Item to compare | CuSn10-C | C90300 |
|---|---|---|
| Copper (Cu) | 88.0-90.0% | 86.0-89.0% |
| Tin (Sn) | 9.0-11.0% | 7.5-9.0% |
| Zinc (Zn) | 0.5% max. | 3.0-5.0% |
| Lead (Pb) | 1.0% max. | 0.30% max. |
| Practical conclusion | Closer to ASTM C90500 / SAE 62 in public cross-reference data | C90300 is not a direct substitute; use only after drawing review |
Ranges checked against public CuSn10-C / EN 1982 references and C90300 Navy G bronze composition data.
Where This Cross-Reference Helps
This page helps when a purchase order lists CuSn10-C but the supplier needs a U.S. ASTM-style callout for quoting cast bronze parts.
If your print uses CuSn10-C, include the full drawing, tolerances, quantity, required supply form, and inspection notes with the RFQ. That lets us quote the material and manufacturing route with fewer back-and-forth questions.
Related Specifications You May See
The same material family may also appear under these names or standards: CuSn10Zn2, CC481K, CuSn10-C, ZCuSn10Zn2, CAC402, CuSn10Zn2, BS1400 PB1, PB1.
If one of these appears on your drawing or purchase record, include it with the RFQ. It helps us understand the original specification and avoid quoting a material that only looks similar on paper.
Before You Substitute the Material
Confirm whether the drawing requires cast or wrought material, then check zinc, lead, mechanical properties, and service conditions before substituting.
Cross-reference charts are helpful for purchasing and maintenance teams, but they do not replace a formal material specification, mill certificate, or customer-approved drawing.
Available Forms
Common supply forms for C90300
Once the material match looks right, the next question is usually shape and machining route. Precision Bronze can quote C90300 as standard stock or finished parts depending on the drawing, size, tolerance, and quantity.
Bronze Solid Bar Bronze solid round bar and rod stock for machining bushings, bearings, pins, spacers, gears, and custom bronze parts. 
Bronze Cored Bar Bronze cored bar and hollow bar stock for efficient machining of sleeve bushings, bearings, rings, and bronze components. 
Plain Bronze Sleeve Bushings Plain bronze sleeve bushings and cast bronze sleeve bearings in C93200 SAE 660 and alternative alloys for radial load applications. 
Flanged Bronze Bushings Flanged bronze bushings and cast bronze sleeve bearings with an integral thrust face for radial support and axial location. 
Custom CNC Bronze Parts Custom CNC machined bronze components, bushings, lead screw nuts, wear parts, and replacement parts made from drawings or samples.