Copper Alloy C92500-M02
Heat-treated state
UNS C92500
M02 = as centrifugally cast
Pick for bushings, sleeves and worm-gear rims needing dense, porosity-free wall sections.
Values for the M02 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 |
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 |
M02This page 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-M02?
C92500-M02 is C92500 heat treated to M02 — pick for bushings, sleeves and worm-gear rims needing dense, porosity-free wall sections. C92500-M02 has a yield strength of 172 MPa (24.9 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 60% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 103 GPa (14.9 Msi). C92500-M02 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; M02 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-M02 properties
Typical room-temperature values for C92500-M02; 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-M02 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-M02 has a yield strength of 172 MPa (24.9 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 60% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal5
C92500-M02 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-M02 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-M02 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-M02'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-M02
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-M02 — frequently asked
What is C92500-M02 used for?
C92500-M02 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-M02?
C92500-M02 has a typical yield strength of 172 MPa (24.9 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 60% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C92500-M02 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-M02 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-M02?
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-M02 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-M02?
C92500-M02 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.