Copper Alloy CC762S
EN CC762S
CC762S (CuZn25Al5Mn4Fe3-C, C86300) is a high-strength complex aluminium-manganese cast brass of the manganese-bronze type, strengthened by aluminium, manganese and iron additions.
Reference datasheet — CC762S is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the GS condition
CC762S tempers and conditions
CC762S is supplied in 4 conditions, soft to hard. GS is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
GSDefault Sand cast | Standard route for one-off and medium-size heavy sections such as worm-gear rims, nuts and bearing housings. | 470 | 780 | 12 | 200 HB | 8 % IACS |
Permanent (metal) mould cast | Choose for repeat mid-volume parts needing finer grain, tighter dimensions and slightly higher strength than sand cast. | 490 | 810 | 12 | 210 HB | 8 % IACS |
Centrifugally cast | Best for large bushings, ring gears and cylinder liners where a dense, porosity-free wall is required. | 490 | 820 | 13 | 210 HB | 8 % IACS |
Continuous cast | Stock bar and tube form for machined nuts, slides and wear plates; highest yield strength with slightly lower ductility. | 510 | 800 | 10 | 215 HB | 8 % IACS |
What is CC762S?
CC762S (CuZn25Al5Mn4Fe3-C, C86300) is a high-strength complex aluminium-manganese cast brass of the manganese-bronze type, strengthened by aluminium, manganese and iron additions. Default-condition properties are 470 MPa yield, 780 MPa tensile, 12 % elongation and 200 HB with service to 200 °C, supplied as sand (GS), permanent-mould (GM), centrifugal (GZ) and continuous (GC) castings for heavily loaded structural and wear parts. It is tough and gummy to machine, has poor fusion weldability, and heavy sections need careful feeding to avoid shrinkage porosity. For easier machining at lower strength, use CC753S. CC762S has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 90% of copper alloy grades. It melts at 870°C (1,598 °F). CC762S has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 87% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 100 GPa (14.5 Msi).
What is CC762S used for?
- marine propeller hubs
- gears
- heavy-duty bushings
- structural castings
Advantages
- High strength — 470 MPa (68.2 ksi), better than 87% of copper alloy grades
Limitations
- Needs corrosion protection — 52/100, worse than 93% of copper alloy grades
- Hard to polish — 60/100, worse than 92% of copper alloy grades
- Poor heat conductor — 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 86% of copper alloy grades
- Limited formability — 12/100, worse than 85% of copper alloy grades
- Low stiffness — 100 GPa (14.5 Msi), worse than 82% of copper alloy grades
CC762S properties
Typical room-temperature values for CC762S-GS; bars are the position among copper alloy grades.
Physical3
CC762S has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 90% of copper alloy grades. It melts at 870°C (1,598 °F).
Mechanical15
CC762S has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 87% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
CC762S 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
CC762S conducts electricity at 8 % IACS, worse than 81% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is fair (52/100), worse than 93% of copper alloy grades.
Sustainability4
Producing a kilogram of CC762S takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 75%.
Manufacturability8
CC762S's machinability is poor (26/100, worse than 81% of copper alloy grades); weldability poor (28/100); formability not recommended (12/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. CC762S is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CC762S
Is CC762S easy to machine?
Tough, gummy β-brass with hard Fe/Mn particles — use rigid setups, sharp carbide (K10/K20) with positive rake, moderate speed (60–120 m/min), heavy flood coolant; chips are stringy, so chip-breaking geometry helps.
Can CC762S be welded?
Poor fusion weldability: Al/Mn oxide films and Zn fuming cause porosity; if repair is unavoidable use GTAW with aluminium-bronze filler, preheat 150–250 °C, thorough oxide removal, and avoid welding on stress-loaded sections.
Can CC762S be formed, bent or molded?
Cast-only alloy — no cold forming; pour 980–1050 °C with clean, degassed melt, generous chills/risers and directional solidification to avoid shrinkage porosity in heavy sections; stress-relieve 250–300 °C before final machining.
CC762S 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; balance in some national specs | 60 – 66 | 63 |
| Alβ-phase stabiliser / main strengthener (C86300 allows up to 7.5) | 4 – 6 | 5 |
| Mnsolid-solution strengthening, deoxidiser | 2.5 – 5 | 4 |
| Fegrain refiner, forms hard Fe-rich particles for wear resistance | 2 – 4 | 3 |
| Niimpurity limit | ≤ 1 | |
| Snimpurity limit | ≤ 0.2 | |
| Pbimpurity limit | ≤ 0.2 | |
| Siimpurity limit | ≤ 0.1 | |
| Zn | ≥ 22 (balance) |
What surface finishes work on CC762S?
Not anodisable; finish by machining/grinding, then chemical blackening, chromate/benzotriazole tarnish inhibitors, tin or nickel plating for contact surfaces, or paint on non-wear areas.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Equivalent designations
Standards and trade names that resolve to Copper Alloy CC762S in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CuZn25AI5Mn4Fe3-C
- Similar grades
- C86300
How much does CC762S cost?
CC762S is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
CC762S — frequently asked
What is CC762S used for?
CC762S is typically used for marine propeller hubs, gears, heavy-duty bushings and structural castings. In short: strongest cast brass grade; manganese-bronze type; 200 HB wear surfaces.
What is the yield strength of CC762S?
CC762S has a typical yield strength of 470 MPa (68.2 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 87% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is CC762S easy to machine?
Not especially — machinability is rated poor (26/100, worse than 81% of copper alloy grades). Tough, gummy β-brass with hard Fe/Mn particles — use rigid setups, sharp carbide (K10/K20) with positive rake, moderate speed (60–120 m/min), heavy flood coolant; chips are stringy, so chip-breaking geometry helps.
Can CC762S be welded?
Not readily — weldability is rated poor (28/100). Poor fusion weldability: Al/Mn oxide films and Zn fuming cause porosity; if repair is unavoidable use GTAW with aluminium-bronze filler, preheat 150–250 °C, thorough oxide removal, and avoid welding on stress-loaded sections.
What surface finishes work on CC762S?
Not anodisable; finish by machining/grinding, then chemical blackening, chromate/benzotriazole tarnish inhibitors, tin or nickel plating for contact surfaces, or paint on non-wear areas.
Can CC762S be formed, bent or molded?
Cast-only alloy — no cold forming; pour 980–1050 °C with clean, degassed melt, generous chills/risers and directional solidification to avoid shrinkage porosity in heavy sections; stress-relieve 250–300 °C before final machining.
What is the maximum service temperature of CC762S?
CC762S 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 CC762S-GS and CC762S-GC?
GS is the default condition — standard route for one-off and medium-size heavy sections such as worm-gear rims, nuts and bearing housings. GC: stock bar and tube form for machined nuts, slides and wear plates; highest yield strength with slightly lower ductility. Yield strength is 470 MPa in GS versus 510 MPa in GC.
How much does CC762S cost?
CC762S is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 1982 — Copper and copper alloys: ingots and castings — CEN (2017)
- ASTM B505/B505M — Copper alloy continuous castings (C86300) — ASTM (2018)
- CDA alloy datasheet C86300 (Manganese Bronze A / high-strength) — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties of Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.