Copper Alloy C92500-M05
Finish state
UNS C92500
M05 = as plaster cast
Used for repeat-run small gear blanks and glands where chill casting gives tighter tolerance and finer grain than sand.
Values for the M05 condition
Other C92500 tempers and conditions
C92500 is listed in 4 conditions; see the grade overview at C92500.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard ASTM B584 sand-cast condition for gears, worm wheels and pressure-tight housings. | 152 | 303 | 20 | 80 HB | 11 % IACS |
M05This page As plaster cast | Used for repeat-run small gear blanks and glands where chill casting gives tighter tolerance and finer grain than sand. | 165 | 320 | 15 | 85 HB | 11 % IACS |
As centrifugally cast | Pick for bushings, sleeves and worm-gear rims needing dense, porosity-free wall sections. | 172 | 330 | 15 | 85 HB | 11 % IACS |
As continuous cast | Continuous-cast bar/tube stock — finest grain and highest strength/hardness, best for machined bearings and nuts. | 193 | 345 | 12 | 90 HB | 11 % IACS |
What is C92500-M05?
C92500-M05 is C92500 supplied in the M05 condition — used for repeat-run small gear blanks and glands where chill casting gives tighter tolerance and finer grain than sand. C92500-M05 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 320 MPa (46.4 ksi) — weaker than 64% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 103 GPa (14.9 Msi). C92500-M05 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 831°C (1,528 °F). M01 is the default condition FabDigit quotes; M05 is available on request or by drawing note.
Advantages
- High service temperature — 260°C (500 °F), better than 75% of copper alloy grades
Limitations
- Limited formability — 5/100, worse than 98% of copper alloy grades
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
C92500-M05 properties
Typical room-temperature values for C92500-M05; 19 are specific to this condition. Other listed values are C92500 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C92500-M05 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 831°C (1,528 °F).
Mechanical13
C92500-M05 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 320 MPa (46.4 ksi) — weaker than 64% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal5
C92500-M05 is rated for continuous service to 260°C (500 °F). It conducts heat at 46.7 W/m·K (27 BTU/hr·ft·°F), worse than 72% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C92500-M05 conducts electricity at 11 % IACS, worse than 68% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (71/100), better than 80% of copper alloy grades.
Sustainability4
Producing a kilogram of C92500-M05 takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 60%.
Manufacturability8
C92500-M05's machinability is good (55/100, better than 71% of copper alloy grades); weldability poor (25/100); formability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C92500-M05
Is C92500 easy to machine?
Machines well with sharp positive-rake carbide or HSS tools at ~30 % of free-cutting brass; use light feeds and flood coolant, the phosphide phase is abrasive.
Can C92500 be welded?
Poor fusion weldability because of lead and hot-short tin-rich phase — repair by braze or by GTAW with matching phosphor-bronze filler, preheat 150–200 °C and peen.
Can C92500 be formed, bent or molded?
Cast-only alloy: use generous fillets, directional solidification and chills; not workable by cold forming.
What surface finishes work on C92500?
Takes a fine mechanical polish and readily accepts tin/nickel plating and soft solder; lacquer or wax if bright appearance must be kept.
C92500 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 | 10 – 12 | 11 |
| Pbaids machining and pressure-tightness | 1 – 1.5 | 1.2 |
| Niincludes Co | 0.8 – 1.5 | 1 |
| Zn | ≤ 0.5 | — |
| Fe | ≤ 0.3 | — |
| Pdeoxidizer, forms hard phosphide for wear resistance | ≤ 0.3 | 0.1 |
| Sb | ≤ 0.25 | — |
| S | ≤ 0.05 | — |
| Al | ≤ 0.01 | — |
| Si | ≤ 0.01 | — |
| Cu | balance | — |
C92500-M05 — frequently asked
What is C92500-M05 used for?
C92500-M05 is typically used for gears, bearings and pump components. In short: nickel-phosphorus tin bronze; pressure-tight gear bronze; cast-only wear alloy.
What is the yield strength of C92500-M05?
C92500-M05 has a typical yield strength of 165 MPa (23.9 ksi) and a tensile strength of 320 MPa (46.4 ksi) — weaker than 64% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C92500-M05 easy to machine?
Reasonably — machinability is rated good (55/100, better than 71% of copper alloy grades). Machines well with sharp positive-rake carbide or HSS tools at ~30 % of free-cutting brass; use light feeds and flood coolant, the phosphide phase is abrasive.
Can C92500-M05 be welded?
Not readily — weldability is rated poor (25/100). Poor fusion weldability because of lead and hot-short tin-rich phase — repair by braze or by GTAW with matching phosphor-bronze filler, preheat 150–200 °C and peen.
What surface finishes work on C92500-M05?
Takes a fine mechanical polish and readily accepts tin/nickel plating and soft solder; lacquer or wax if bright appearance must be kept.
Can C92500-M05 be formed, bent or molded?
Cast-only alloy: use generous fillets, directional solidification and chills; not workable by cold forming.
What is the maximum service temperature of C92500-M05?
C92500-M05 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.
What is the difference between C92500-M01 and C92500-M07?
M01 is the default condition — standard ASTM B584 sand-cast condition for gears, worm wheels and pressure-tight housings. M07: continuous-cast bar/tube stock — finest grain and highest strength/hardness, best for machined bearings and nuts. Yield strength is 152 MPa in M01 versus 193 MPa in M07.
Sources
- ASTM B584 — Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- ASTM B271 — Copper-Base Alloy Centrifugal Castings — ASTM International (2020)
- CDA Alloy Datasheet C92500 (copper.org) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 15 — Casting — ASM International (2008)
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.