Copper Alloy C63280-O60
Temper
UNS C63280 · ASTM B150
O60 = soft annealed
Soft condition for maximum ductility before forming or as a stress-relieved state after welding.
Values for the O60 condition
Other C63280 tempers and conditions
C63280 is listed in 5 conditions; see the grade overview at C63280.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
O60This page Soft annealed | Soft condition for maximum ductility before forming or as a stress-relieved state after welding. | 350 | 700 | 20 | 11 HRC | 7.5 % IACS |
M30Default As hot extruded | Standard stock condition for rod, bar and shapes; best balance of strength, ductility and price. | 470 | 790 | 15 | 21 HRC | 7 % IACS |
Hot rolled and cold drawn | Choose for tighter dimensional tolerance and slightly higher yield in small-diameter bar. | 520 | 815 | 12 | 22 HRC | 7 % IACS |
Quenched and tempered | Use where maximum strength and hardness with uniform section properties are required in heavy bar and forgings. | 550 | 830 | 12 | 24 HRC | 6.5 % IACS |
Solution heat treated and precipitation hardened | Highest strength condition, specified for heavily loaded shafts and fasteners where κ-phase distribution is controlled. | 580 | 855 | 10 | 26 HRC | 6.5 % IACS |
What is C63280-O60?
C63280-O60 is C63280 in the O60 temper — soft condition for maximum ductility before forming or as a stress-relieved state after welding. C63280-O60 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 74% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 117 GPa (17 Msi). C63280-O60 has a density of 7.58 g/cm³ (0.274 lb/in³), lighter than 94% of copper alloy grades. It melts at 1,040°C (1,904 °F). M30 is the default condition FabDigit quotes; O60 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 82/100, better than 98% of copper alloy grades
- Lightweight — 7.58 g/cm³ (0.274 lb/in³), better than 94% of copper alloy grades
- Readily welded — 75/100, better than 89% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
Limitations
- Low electrical conductivity — 7.5 % IACS, worse than 84% of copper alloy grades
- Poor heat conductor — 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 82% of copper alloy grades
- High embodied carbon — 4.5 kg CO₂/kg, worse than 79% of copper alloy grades
C63280-O60 properties
Typical room-temperature values for C63280-O60; 23 are specific to this condition. Other listed values are C63280 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C63280-O60 has a density of 7.58 g/cm³ (0.274 lb/in³), lighter than 94% of copper alloy grades. It melts at 1,040°C (1,904 °F).
Mechanical17
C63280-O60 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 74% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C63280-O60 is rated for continuous service to 300°C (572 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 82% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C63280-O60 conducts electricity at 7.5 % IACS, worse than 84% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 98% of copper alloy grades.
Sustainability4
Producing a kilogram of C63280-O60 takes about 65 MJ of energy and emits 4.5 kg of CO₂ — more than 81% of copper alloy grades. Typical recycled content is 30%.
Manufacturability7
C63280-O60's machinability is fair (35/100, better than 51% of copper alloy grades); weldability very good (75/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C63280-O60
Is C63280 easy to machine?
Machines like a tough duplex alloy — rigid setup, sharp positive-rake carbide, moderate speed (50–90 m/min) with generous coolant; avoid dwelling to prevent work hardening.
Can C63280 be welded?
GTAW/GMAW readily with ERCuNiAl-A2/B3 filler under argon; preheat 150–200 °C for heavy sections, clean the oxide film before each pass and avoid excessive heat input.
Can C63280 be formed, bent or molded?
Hot work at 800–900 °C; cold forming is limited to gentle bends — anneal at 620–670 °C and slow-cool for any severe cold work.
What surface finishes work on C63280?
Not anodizable; pickle in sulphuric/nitric to remove the alumina film, then polish, or apply epoxy/antifouling coatings for immersed service — no plating usually needed.
C63280 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 |
|---|---|---|
| Al | 8.5 – 9.5 | 9 |
| NiNi ≥ Fe usually specified for dealloying resistance | 4 – 5.5 | 4.8 |
| Fe | 4 – 5 | 4.5 |
| Mn | 1.2 – 2 | 1.5 |
| Si | ≤ 0.1 | — |
| Zn | ≤ 0.3 | — |
| Sn | ≤ 0.2 | — |
| Pb | ≤ 0.02 | — |
| Curemainder, ~74.5 % min | balance | — |
C63280-O60 — frequently asked
What is C63280-O60 used for?
C63280-O60 is typically used for propeller shafts, landing gear components and high-load marine fasteners. In short: stronger than C63200; shaft-grade nickel-aluminum bronze; limited cold formability.
What is the yield strength of C63280-O60?
C63280-O60 has a typical yield strength of 350 MPa (50.8 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 74% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C63280-O60 easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of copper alloy grades). Machines like a tough duplex alloy — rigid setup, sharp positive-rake carbide, moderate speed (50–90 m/min) with generous coolant; avoid dwelling to prevent work hardening.
Can C63280-O60 be welded?
Yes — weldability is rated very good (75/100). GTAW/GMAW readily with ERCuNiAl-A2/B3 filler under argon; preheat 150–200 °C for heavy sections, clean the oxide film before each pass and avoid excessive heat input.
What surface finishes work on C63280-O60?
Not anodizable; pickle in sulphuric/nitric to remove the alumina film, then polish, or apply epoxy/antifouling coatings for immersed service — no plating usually needed.
Can C63280-O60 be formed, bent or molded?
Hot work at 800–900 °C; cold forming is limited to gentle bends — anneal at 620–670 °C and slow-cool for any severe cold work.
What is the maximum service temperature of C63280-O60?
C63280-O60 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C63280-M30 and C63280-O60?
M30 is the default condition — standard stock condition for rod, bar and shapes; best balance of strength, ductility and price. O60: soft condition for maximum ductility before forming or as a stress-relieved state after welding. Yield strength is 470 MPa in M30 versus 350 MPa in O60.
Sources
- ASTM B150/B150M — Aluminum Bronze Rod, Bar, and Shapes — ASTM International (2019)
- CDA UNS Alloy Database (C632xx nickel-aluminum bronzes) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties of Nonferrous Alloys — ASM International (1990)
- Nickel Aluminium Bronze alloy datasheets — Nickel Institute / Aviva Metals / Columbia Metals (2021)
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.