Copper Alloy C86200-M02
Heat-treated state
UNS C86200
M02 = as centrifugally cast
Pick for hollow bushings, worm-gear blanks and rings where the denser, finer centrifugal structure gives slightly higher strength and soundness.
Values for the M02 condition
Other C86200 tempers and conditions
C86200 is listed in 4 conditions; see the grade overview at C86200.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard as-cast sand casting condition per ASTM B584 — the usual stocked/produced form for gears, valve stems and marine parts. | 340 | 690 | 20 | 180 HB | 8 % IACS |
As plaster cast | Use for medium-volume repeat parts needing better dimensional control and a finer grain than sand casting. | 345 | 700 | 18 | 185 HB | 8 % IACS |
M02This page As centrifugally cast | Pick for hollow bushings, worm-gear blanks and rings where the denser, finer centrifugal structure gives slightly higher strength and soundness. | 350 | 725 | 18 | 190 HB | 8 % IACS |
As continuous cast | Choose continuous-cast bar or tube stock when machining finished gears/bushings from solid with minimal porosity. | 350 | 705 | 18 | 185 HB | 8 % IACS |
What is C86200-M02?
C86200-M02 is C86200 heat treated to M02 — pick for hollow bushings, worm-gear blanks and rings where the denser, finer centrifugal structure gives slightly higher strength and soundness. C86200-M02 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 725 MPa (105 ksi) — stronger than 74% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 105 GPa (15.2 Msi). C86200-M02 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 90% of copper alloy grades. It melts at 862°C (1,584 °F). M01 is the default condition FabDigit quotes; M02 is available on request or by drawing note.
Advantages
- Low embodied carbon — 3 kg CO₂/kg, better than 97% of copper alloy grades
Limitations
- Poor heat conductor — 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 86% of copper alloy grades
- Low electrical conductivity — 8 % IACS, worse than 81% of copper alloy grades
- Limited formability — 15/100, worse than 79% of copper alloy grades
C86200-M02 properties
Typical room-temperature values for C86200-M02; 20 are specific to this condition. Other listed values are C86200 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C86200-M02 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 90% of copper alloy grades. It melts at 862°C (1,584 °F).
Mechanical14
C86200-M02 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 725 MPa (105 ksi) — stronger than 74% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal5
C86200-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 20.3 µm/m·K (11.3 µin/in·°F).
Electrical3
C86200-M02 conducts electricity at 8 % IACS, worse than 81% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 68% of copper alloy grades.
Sustainability4
Producing a kilogram of C86200-M02 takes about 45 MJ of energy and emits 3 kg of CO₂ — less than 97% of copper alloy grades. Typical recycled content is 70%.
Manufacturability7
C86200-M02's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability fair (40/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C86200-M02
Is C86200 easy to machine?
Machinability ~30% of free-cutting brass — tough, stringy chips; use sharp positive-rake carbide, rigid setups, moderate speeds and generous coolant.
Can C86200 be welded?
Arc (GTAW/GMAW) welding with matching aluminum-bronze/manganese-bronze filler is fair; preheat and low heat input, avoid oxyfuel due to Al oxide film; soldering is poor.
Can C86200 be formed, bent or molded?
Casting alloy only — sand, permanent mold, centrifugal and continuous cast; degas and skim well to avoid Al oxide dross and control pouring turbulence.
What surface finishes work on C86200?
Polishes to a bright gold tone; can be chrome/nickel plated after proper strike, and often left bare with protective lacquer for marine service.
C86200 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 | 60 – 66 | 63 |
| Al | 3 – 4.9 | 4 |
| Fe | 2 – 4 | 3 |
| Mn | 2.5 – 5 | 3.5 |
| Niincluding Co | ≤ 1 | — |
| Sn | ≤ 0.2 | — |
| Pb | ≤ 0.2 | — |
| Zn | ≥ 22 (balance) | — |
C86200-M02 — frequently asked
What is C86200-M02 used for?
C86200-M02 is typically used for gears, valve stems, marine fittings and heavy machinery parts. In short: high-strength cast bronze; tough marine casting alloy; stronger than C86500.
What is the yield strength of C86200-M02?
C86200-M02 has a typical yield strength of 350 MPa (50.8 ksi) and a tensile strength of 725 MPa (105 ksi) — stronger than 74% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C86200-M02 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Machinability ~30% of free-cutting brass — tough, stringy chips; use sharp positive-rake carbide, rigid setups, moderate speeds and generous coolant.
Can C86200-M02 be welded?
With care — weldability is rated fair (40/100). Arc (GTAW/GMAW) welding with matching aluminum-bronze/manganese-bronze filler is fair; preheat and low heat input, avoid oxyfuel due to Al oxide film; soldering is poor.
What surface finishes work on C86200-M02?
Polishes to a bright gold tone; can be chrome/nickel plated after proper strike, and often left bare with protective lacquer for marine service.
Can C86200-M02 be formed, bent or molded?
Casting alloy only — sand, permanent mold, centrifugal and continuous cast; degas and skim well to avoid Al oxide dross and control pouring turbulence.
What is the maximum service temperature of C86200-M02?
C86200-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 C86200-M01 and C86200-M02?
M01 is the default condition — standard as-cast sand casting condition per ASTM B584 — the usual stocked/produced form for gears, valve stems and marine parts. M02: pick for hollow bushings, worm-gear blanks and rings where the denser, finer centrifugal structure gives slightly higher strength and soundness. Yield strength is 340 MPa in M01 versus 350 MPa in M02.
Sources
- ASTM B584 — Standard Specification for 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 Database — C86200 Manganese Bronze — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASTM B601 — Temper Designations for Copper and Copper Alloys — ASTM International (2019)
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.