Copper Alloy C86800-M02
Heat-treated state
UNS C86800
M02 = as centrifugally cast
Choose for rings, sleeves and bushings needing denser, more uniform structure than sand cast.
Values for the M02 condition
Other C86800 tempers and conditions
C86800 is listed in 4 conditions; see the grade overview at C86800.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Default stocked/most-produced condition: general-purpose sand castings to ASTM B584. | 290 | 565 | 20 | 150 HB | 7.5 % IACS |
M02This page As centrifugally cast | Choose for rings, sleeves and bushings needing denser, more uniform structure than sand cast. | 305 | 590 | 22 | 155 HB | 7.5 % IACS |
As plaster cast | Use for repeat production of small/medium parts where finer grain and better surface than sand cast are wanted. | 305 | 585 | 20 | 155 HB | 7.5 % IACS |
As continuous cast | Pick for stock bar, tube and hollow bar to be machined into bushings and hydraulic components. | 315 | 600 | 18 | 160 HB | 7.5 % IACS |
What is C86800-M02?
C86800-M02 is C86800 heat treated to M02 — choose for rings, sleeves and bushings needing denser, more uniform structure than sand cast. C86800-M02 has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 590 MPa (85.6 ksi) — stronger than 62% of copper alloy grades. Elongation at break is 22% and the elastic modulus is 105 GPa (15.2 Msi). C86800-M02 has a density of 7.9 g/cm³ (0.285 lb/in³), lighter than 88% of copper alloy grades. It melts at 875°C (1,607 °F). M01 is the default condition FabDigit quotes; M02 is available on request or by drawing note.
Limitations
- Hard to polish — 65/100, worse than 87% of copper alloy grades
- Poor heat conductor — 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 86% of copper alloy grades
- Low electrical conductivity — 7.5 % IACS, worse than 84% of copper alloy grades
C86800-M02 properties
Typical room-temperature values for C86800-M02; 20 are specific to this condition. Other listed values are C86800 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C86800-M02 has a density of 7.9 g/cm³ (0.285 lb/in³), lighter than 88% of copper alloy grades. It melts at 875°C (1,607 °F).
Mechanical15
C86800-M02 has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 590 MPa (85.6 ksi) — stronger than 62% of copper alloy grades. Elongation at break is 22% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal5
C86800-M02 is rated for continuous service to 200°C (392 °F). It conducts heat at 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 86% of copper alloy grades. Thermal expansion is 20.5 µm/m·K (11.4 µin/in·°F).
Electrical3
C86800-M02 conducts electricity at 7.5 % IACS, worse than 84% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (63/100), better than 52% of copper alloy grades.
Sustainability4
Producing a kilogram of C86800-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 65%.
Manufacturability7
C86800-M02's machinability is fair (35/100, better than 51% 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 C86800-M02
Is C86800 easy to machine?
Machines like tough manganese bronze: rating ~30% of free-cutting brass — use rigid setups, positive-rake carbide, moderate speeds and generous coolant; chips are stringy, not free-breaking.
Can C86800 be welded?
Fusion welding is difficult (zinc fume, porosity, hot cracking); prefer GTAW/GMAW repair with matched or aluminium-bronze filler, low heat input and preheat control, or braze/mechanical joining.
Can C86800 be formed, bent or molded?
Casting alloy only — good fluidity but wide freezing range, so use tapered risers, chills and clean degassed melt; no cold forming, hot working is limited.
What surface finishes work on C86800?
Not anodizable; finish by shot blasting, grinding/polishing to a bright yellow-gold surface, or electroplate nickel/chrome/tin; seawater parts often left bare or epoxy coated.
C86800 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 |
|---|---|---|
| Cu | 53.5 – 57 | 55 |
| Mn | 2.5 – 4 | 3.2 |
| NiNi+Co | 2.5 – 4 | 3.2 |
| Fe | 1 – 2.5 | 1.8 |
| Al | ≤ 2 | 1 |
| Sn | ≤ 1 | — |
| Pb | ≤ 0.4 | — |
| Znremainder, typically 32–36% | balance | — |
C86800-M02 — frequently asked
What is C86800-M02 used for?
C86800-M02 is typically used for marine propeller parts, valve bodies, pump components and gears. In short: high-strength marine bronze; 565 MPa cast tensile; difficult to weld.
What is the yield strength of C86800-M02?
C86800-M02 has a typical yield strength of 305 MPa (44.2 ksi) and a tensile strength of 590 MPa (85.6 ksi) — stronger than 62% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C86800-M02 easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of copper alloy grades). Machines like tough manganese bronze: rating ~30% of free-cutting brass — use rigid setups, positive-rake carbide, moderate speeds and generous coolant; chips are stringy, not free-breaking.
Can C86800-M02 be welded?
Not readily — weldability is rated poor (30/100). Fusion welding is difficult (zinc fume, porosity, hot cracking); prefer GTAW/GMAW repair with matched or aluminium-bronze filler, low heat input and preheat control, or braze/mechanical joining.
What surface finishes work on C86800-M02?
Not anodizable; finish by shot blasting, grinding/polishing to a bright yellow-gold surface, or electroplate nickel/chrome/tin; seawater parts often left bare or epoxy coated.
Can C86800-M02 be formed, bent or molded?
Casting alloy only — good fluidity but wide freezing range, so use tapered risers, chills and clean degassed melt; no cold forming, hot working is limited.
What is the maximum service temperature of C86800-M02?
C86800-M02 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C86800-M01 and C86800-M07?
M01 is the default condition — default stocked/most-produced condition: general-purpose sand castings to ASTM B584. M07: pick for stock bar, tube and hollow bar to be machined into bushings and hydraulic components. Yield strength is 290 MPa in M01 versus 315 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 UNS alloy datasheet C86800 — Copper Development Association (copper.org) (2024)
- 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.