Bronze Fittings
C92200 Steam / Valve Bronze Fittings
A leaded tin-zinc bronze developed for steam and valve castings that need pressure tightness and reliable service in hot water and steam.
Product overview
C92200 fittings are a conventional choice for steam and hot-water systems. Fitting types, sizes and pressure class are confirmed with the company; no pressure rating is stated on this page.
C92200 – often called steam bronze, valve bronze or Navy “M” bronze – has been a standard material for pressure-retaining castings in steam, hot water and general fluid service. A tin-bronze base with controlled lead and zinc additions gives sound, pressure-tight castings with good machinability.
It is a widely used valve and fitting material, particularly for steam and water duty. Because it contains lead, it is not intended for potable-water contact where lead content is restricted.
Material identification
| Item | Detail |
|---|---|
| UNS designation | C92200 |
| Material | Steam / Valve Bronze (Navy “M” Bronze) |
| Alloy family | Valve and Steam Bronze |
| Alloy type | Cast copper-tin-lead-zinc alloy |
| Product form | Fittings |
| Availability | Listed – sizes, tolerances and stock confirmed per inquiry |
Where it is used
- Steam valves and valve bodies
- Pipe fittings and unions for steam / hot water
- Pump and boiler fittings
- Marine auxiliary systems (compatible service)
Machining and fabrication
Good machinability. Can be soldered or brazed in typical fitting designs. Weld repairs should follow a qualified procedure.
Forms and sizes
- Elbows (45° and 90°)
- Tees and crosses
- Couplings and reducers
- Unions, plugs and caps
- Custom fittings to drawing
Only fitting types technically appropriate to the material, application and manufacturing method are offered. Sizes, thread forms and ratings are confirmed with the company. Do not rely on this page for dimensions, tolerances or stock.
What to include in your inquiry
- UNS grade and governing specification
- Dimensions (or drawing) and tolerance class
- Quantity and delivery timing
- Application and operating environment
- Certificate / inspection requirements
Composition reference
| Element | Nominal limit, wt % |
|---|---|
| Copper (Cu) | 86.0 – 90.0 |
| Tin (Sn) | 5.5 – 6.5 |
| Lead (Pb) | 1.0 – 2.0 |
| Zinc (Zn) | 3.0 – 5.0 |
| Nickel (Ni, incl. Co) | 1.0 max |
| Iron (Fe) | 0.25 max |
| Antimony (Sb) | 0.25 max |
| Phosphorus (P) | 0.05 max |
| Sulfur (S) | 0.05 max |
Reference data only – typical or nominal values from published specifications, not a guarantee of supplied material. Confirm against the current edition of the applicable specification, the product form and condition, and the material test certificate. Technical review by the company is required before publication or reliance.
Commonly referenced specifications
- ASTM B61 – steam or valve bronze castings
Related grades
Frequently asked questions
Is C92200 the same as C83600?
No. C92200 is a higher-tin steam / valve bronze (about 6% tin); C83600 is the 85-5-5-5 pipe-fitting alloy with more lead and zinc.
What pressure can a C92200 fitting hold?
Rating depends on the fitting design, size, temperature and governing standard. No rating is stated on this website; confirm with the company.
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