Copper Alloy CC763S-GC (Continuously cast)
Finish state
EN CC763S
Stock bar and tube for machined bearings and nuts — uniform fine structure, ready for turning.
Values for the GC condition
Other CC763S tempers and conditions
CC763S is listed in 4 conditions; see the grade overview at CC763S.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
GSDefault Sand cast | Default engineering-casting condition: large or one-off parts, valve bodies, bearing housings, gears. | 300 | 640 | 14 | 150 HB | 12 % IACS |
Gravity die (permanent mould) cast | Pick for repeat medium-volume parts needing tighter tolerances and finer grain than sand casting. | 330 | 670 | 14 | 160 HB | 12 % IACS |
GCThis page Continuously cast | Stock bar and tube for machined bearings and nuts — uniform fine structure, ready for turning. | 370 | 720 | 12 | 165 HB | 12 % IACS |
Centrifugally cast | Best for bushings, sleeves and worm-wheel rims: dense, porosity-free wall with the highest strength. | 380 | 730 | 12 | 170 HB | 12 % IACS |
What is CC763S-GC?
CC763S-GC is CC763S supplied in the GC condition — stock bar and tube for machined bearings and nuts — uniform fine structure, ready for turning. CC763S-GC has a yield strength of 370 MPa (53.7 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 75% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 104 GPa (15.1 Msi). CC763S-GC has a density of 7.9 g/cm³ (0.285 lb/in³), lighter than 88% of copper alloy grades. It melts at 880°C (1,616 °F). GS is the default condition FabDigit quotes; GC is available on request or by drawing note.
Advantages
- Low embodied carbon — 3.2 kg CO₂/kg, better than 92% of copper alloy grades
- High strength — 370 MPa (53.7 ksi), better than 75% of copper alloy grades
Limitations
- Limited formability — 18/100, worse than 75% of copper alloy grades
CC763S-GC properties
Typical room-temperature values for CC763S-GC; 21 are specific to this condition. Other listed values are CC763S reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
CC763S-GC has a density of 7.9 g/cm³ (0.285 lb/in³), lighter than 88% of copper alloy grades. It melts at 880°C (1,616 °F).
Mechanical15
CC763S-GC has a yield strength of 370 MPa (53.7 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 75% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 104 GPa (15.1 Msi).
Thermal6
CC763S-GC is rated for continuous service to 200°C (392 °F). It conducts heat at 60 W/m·K (34.7 BTU/hr·ft·°F), worse than 59% of copper alloy grades. Thermal expansion is 20.5 µm/m·K (11.4 µin/in·°F).
Electrical3
CC763S-GC conducts electricity at 12 % IACS, worse than 62% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (63/100), better than 52% of copper alloy grades.
Sustainability4
Producing a kilogram of CC763S-GC takes about 48 MJ of energy and emits 3.2 kg of CO₂ — less than 92% of copper alloy grades. Typical recycled content is 70%.
Manufacturability8
CC763S-GC's machinability is fair (40/100, better than 57% of copper alloy grades); weldability poor (30/100); formability poor (18/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CC763S-GC
Is CC763S easy to machine?
Machines like a tough alpha-beta brass, roughly one-third the ease of C36000 — use sharp carbide, positive rake, 0.1–0.3 mm/rev feeds and generous coolant; chips are gummy and Fe-rich particles accelerate tool wear.
Can CC763S be welded?
Poor fusion weldability: zinc volatilisation and hot cracking; if unavoidable use MIG/TIG with aluminium-bronze filler, low heat input, preheat 150–200 °C and good fume extraction — brazing or mechanical joining is preferred.
Can CC763S be formed, bent or molded?
A casting alloy only — pour at ~1000–1050 °C with degassed, well-fluxed melt, generous risers and chills for its short freezing range; no cold forming, but hot working around 700–750 °C is possible for wrought analogues.
What surface finishes work on CC763S?
Not anodisable; takes a bright machined or polished finish, and can be tin, nickel or chromium plated after thorough oxide/Al-film removal — passivation or lacquer helps prevent tarnish.
CC763S 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 |
|---|---|---|
| Cumatrix former | 62 – 68 | 64.5 |
| Alprincipal strengthener; raises oxide film stability | 1.3 – 2.5 | 2 |
| Mn | 1.5 – 3 | 2 |
| Fegrain refiner / Fe-rich particles | 0.5 – 1.5 | 1 |
| Niimpurity limit | ≤ 1 | — |
| Snimpurity limit | ≤ 0.4 | — |
| Pbimpurity limit; not a free-cutting addition | ≤ 0.5 | — |
| Siimpurity limit | ≤ 0.1 | — |
| Znremainder, nominally ~32 % | balance | — |
CC763S-GC — frequently asked
What is CC763S-GC used for?
CC763S-GC is typically used for valve bodies, marine hardware, gears and bearings. In short: high-tensile cast brass; seawater-tolerant casting alloy; strong but poorly weldable.
What is the yield strength of CC763S-GC?
CC763S-GC has a typical yield strength of 370 MPa (53.7 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 75% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is CC763S-GC easy to machine?
Not especially — machinability is rated fair (40/100, better than 57% of copper alloy grades). Machines like a tough alpha-beta brass, roughly one-third the ease of C36000 — use sharp carbide, positive rake, 0.1–0.3 mm/rev feeds and generous coolant; chips are gummy and Fe-rich particles accelerate tool wear.
Can CC763S-GC be welded?
Not readily — weldability is rated poor (30/100). Poor fusion weldability: zinc volatilisation and hot cracking; if unavoidable use MIG/TIG with aluminium-bronze filler, low heat input, preheat 150–200 °C and good fume extraction — brazing or mechanical joining is preferred.
What surface finishes work on CC763S-GC?
Not anodisable; takes a bright machined or polished finish, and can be tin, nickel or chromium plated after thorough oxide/Al-film removal — passivation or lacquer helps prevent tarnish.
Can CC763S-GC be formed, bent or molded?
A casting alloy only — pour at ~1000–1050 °C with degassed, well-fluxed melt, generous risers and chills for its short freezing range; no cold forming, but hot working around 700–750 °C is possible for wrought analogues.
What is the maximum service temperature of CC763S-GC?
CC763S-GC 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 CC763S-GS and CC763S-GZ?
GS is the default condition — default engineering-casting condition: large or one-off parts, valve bodies, bearing housings, gears. GZ: best for bushings, sleeves and worm-wheel rims: dense, porosity-free wall with the highest strength. Yield strength is 300 MPa in GS versus 380 MPa in GZ.
Sources
- EN 1982 — Copper and copper alloys: Ingots and castings — CEN (2017)
- ASTM B584 / B505 (C86200 manganese bronze castings) — ASTM International (2022)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- CDA alloy datasheet C86200 (high-strength manganese bronze) — Copper Development Association (2023)
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.