Copper Alloy C92300 M05-Centrifugal
Finish state
UNS C92300
M05-Centrifugal = centrifugally cast
Use for large rings, liners and thick-wall sleeves needing dense, low-porosity walls for pressure or bearing duty.
Values for the M05-Centrifugal condition
What is C92300 M05-Centrifugal?
C92300 M05-Centrifugal is C92300 supplied in the M05-Centrifugal condition — use for large rings, liners and thick-wall sleeves needing dense, low-porosity walls for pressure or bearing duty. C92300 M05-Centrifugal has a yield strength of 145 MPa (21 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 72% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 100 GPa (14.5 Msi). C92300 M05-Centrifugal 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).
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
C92300 M05-Centrifugal properties
Typical room-temperature values for C92300 M05-Centrifugal; 4 are specific to this condition. Other listed values are C92300 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C92300 M05-Centrifugal 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 M05-Centrifugal has a yield strength of 145 MPa (21 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 72% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
C92300 M05-Centrifugal 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 M05-Centrifugal 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 M05-Centrifugal 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 M05-Centrifugal's machinability is very good (76/100, better than 81% of copper alloy grades); weldability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C92300 M05-Centrifugal
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.
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.
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) |
C92300 M05-Centrifugal — frequently asked
What is C92300 M05-Centrifugal used for?
C92300 M05-Centrifugal 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 M05-Centrifugal?
C92300 M05-Centrifugal has a typical yield strength of 145 MPa (21 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 72% of copper alloy grades.
Is C92300 M05-Centrifugal 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 M05-Centrifugal 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 M05-Centrifugal?
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 M05-Centrifugal 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 M05-Centrifugal?
C92300 M05-Centrifugal 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.