Copper Alloy C92300
UNS C92300
C92300 is a leaded tin bronze in the C90000–C95999 cast family, close in composition to Navy-M bronze, combining good castability with pressure-tight walls and a machinability rating of 76.
Reference datasheet — C92300 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
C92300 tempers and conditions
C92300 is supplied in one standard condition, M05-Centrifugal.
Supply forms, finishes and certifications
Ways C92300 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
M01-SandCastDefault | As-cast, sand cast | Surface finish |
M03-PermMold | Permanent mold cast | Surface finish |
M07-ContCast | Continuous cast bar/tube | Surface finish |
What is C92300?
C92300 is a leaded tin bronze in the C90000–C95999 cast family, close in composition to Navy-M bronze, combining good castability with pressure-tight walls and a machinability rating of 76. It is specified for valves, fittings and pump parts and is poured by sand, permanent-mold, centrifugal and continuous casting. Properties are 276 MPa tensile, 124 MPa yield, 25 % elongation, 70 HB and 12 % IACS electrical conductivity; the lead content makes fusion welding unreliable and may exclude the alloy where low-lead potable-water grades are required. C92200 is the nearest alternative. C92300 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 854°C (1,569 °F). C92300 has a yield strength of 124 MPa (18 ksi) and a tensile strength of 276 MPa (40 ksi) — weaker than 78% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 100 GPa (14.5 Msi).
What is C92300 used for?
- valves
- fittings
- pump parts
Advantages
- Easy to machine — 76/100, better than 81% of copper alloy grades
- High service temperature — 260°C (500 °F), better than 75% of copper alloy grades
Limitations
- Hard to polish — 60/100, worse than 92% of copper alloy grades
- Low stiffness — 100 GPa (14.5 Msi), worse than 82% of copper alloy grades
- Low strength — 124 MPa (18 ksi), worse than 78% of copper alloy grades
C92300 properties
Typical room-temperature values; bars are the position among copper alloy grades.
Physical3
C92300 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 854°C (1,569 °F).
Mechanical11
C92300 has a yield strength of 124 MPa (18 ksi) and a tensile strength of 276 MPa (40 ksi) — weaker than 78% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
C92300 is rated for continuous service to 260°C (500 °F). It conducts heat at 65 W/m·K (37.6 BTU/hr·ft·°F), worse than 57% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C92300 conducts electricity at 12 % IACS, worse than 62% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), better than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C92300 takes about 55 MJ of energy and emits 3.8 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 70%.
Manufacturability6
C92300's machinability is very good (76/100, better than 81% of copper alloy grades); weldability poor (30/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C92300 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C92300
Is C92300 easy to machine?
Free-machining with the lead phase present: use positive-rake carbide or HSS, high speed, light feed, and flood coolant to avoid smearing; rated ~80 % of free-cutting brass.
Can C92300 be welded?
Fusion welding is poor because of the lead — prefer brazing or soft soldering; if welding is unavoidable use phosphor-bronze filler with low heat input and expect hot cracking risk.
Can C92300 be formed, bent or molded?
Casting alloy only, not for cold forming; pours well in sand, permanent-mold and centrifugal processes and gives pressure-tight walls with proper risering and directional solidification.
C92300 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Sn | 7.5 – 9 | 8.2 |
| Pb | 0.3 – 1 | 0.6 |
| Zn | 2.5 – 5 | 3.8 |
| Fe | ≤ 0.25 | |
| NiNi incl. Co | ≤ 1 | |
| Sb | ≤ 0.25 | |
| S | ≤ 0.05 | |
| P | ≤ 0.05 | |
| Al | ≤ 0.01 | |
| Si | ≤ 0.01 | |
| CuCu + named elements = 99.3 % min | ≥ 85 (balance) |
What surface finishes work on C92300?
Takes tin, nickel or chrome plating and chemical patinas/lacquers well; achievable polish is limited by microporosity and lead smear, so bead-blast or brushed finishes are common.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
How much does C92300 cost?
C92300 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C92300 — frequently asked
What is C92300 used for?
C92300 is typically used for valves, fittings and pump parts. In short: free-machining valve bronze; good pressure tightness; poor fusion weldability.
What is the yield strength of C92300?
C92300 has a typical yield strength of 124 MPa (18 ksi) and a tensile strength of 276 MPa (40 ksi) — weaker than 78% of copper alloy grades.
Is C92300 easy to machine?
Yes — machinability is rated very good (76/100, better than 81% of copper alloy grades). Free-machining with the lead phase present: use positive-rake carbide or HSS, high speed, light feed, and flood coolant to avoid smearing; rated ~80 % of free-cutting brass.
Can C92300 be welded?
Not readily — weldability is rated poor (30/100). Fusion welding is poor because of the lead — prefer brazing or soft soldering; if welding is unavoidable use phosphor-bronze filler with low heat input and expect hot cracking risk.
What surface finishes work on C92300?
Takes tin, nickel or chrome plating and chemical patinas/lacquers well; achievable polish is limited by microporosity and lead smear, so bead-blast or brushed finishes are common.
Can C92300 be formed, bent or molded?
Casting alloy only, not for cold forming; pours well in sand, permanent-mold and centrifugal processes and gives pressure-tight walls with proper risering and directional solidification.
What is the maximum service temperature of C92300?
C92300 is rated for continuous use to about 260°C (500 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does C92300 cost?
C92300 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM B584 — Copper Alloy Sand Castings for General Applications — ASTM (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM (2018)
- ASTM B271 — Copper-Base Alloy Centrifugal Castings — ASTM (2020)
- C92300 alloy datasheet (copper.org) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.