Copper Alloy CC767S
EN CC767S
CC767S (CuZn38Al-C) is a high-zinc aluminium cast brass with a small aluminium addition for strength and dezincification resistance, giving 150 MPa yield, 400 MPa tensile, 32 % elongation and 80 HB.
Reference datasheet — CC767S 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
CC767S tempers and conditions
CC767S 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-offs, large or complex housings and valve bodies; lowest strength but highest ductility. | 150 | 400 | 32 | 80 HB | 20 % IACS |
Permanent (metal) mould cast | Choose for medium/large series parts needing finer grain, better surface and higher strength than sand casting. | 180 | 450 | 22 | 95 HB | 20 % IACS |
Centrifugally cast | Best for rings, bushings, sleeves and flanges where a dense, porosity-free wall is required. | 190 | 450 | 20 | 100 HB | 20 % IACS |
Continuously cast bar / tube | Semi-finished bar, hollow bar and tube stock for machined pressure-tight components; most uniform properties. | 200 | 460 | 20 | 105 HB | 20 % IACS |
What is CC767S?
CC767S (CuZn38Al-C) is a high-zinc aluminium cast brass with a small aluminium addition for strength and dezincification resistance, giving 150 MPa yield, 400 MPa tensile, 32 % elongation and 80 HB. Its combination of ductility, fluidity and pressure tightness suits sand, permanent-mould, centrifugal and continuous castings (GS, GM, GZ, GC) for housings and fittings. Service is limited to about 200 °C, the machinability rating is 45 because the alloy is essentially unleaded, and fusion welding is constrained by zinc volatilisation. CC766S is the closest alternative when slightly higher yield strength matters more than elongation. CC767S has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 80% of copper alloy grades. It melts at 880°C (1,616 °F). CC767S has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 400 MPa (58 ksi) — weaker than 69% of copper alloy grades. Elongation at break is 32% and the elastic modulus is 100 GPa (14.5 Msi).
What is CC767S used for?
- pump housings
- valve bodies
- structural castings
Advantages
- Low embodied carbon — 3.1 kg CO₂/kg, better than 95% of copper alloy grades
- Ductile — tolerates forming and impact — 32%, better than 77% of copper alloy grades
Limitations
- Low stiffness — 100 GPa (14.5 Msi), worse than 82% of copper alloy grades
CC767S properties
Typical room-temperature values for CC767S-GS; bars are the position among copper alloy grades.
Physical3
CC767S has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 80% of copper alloy grades. It melts at 880°C (1,616 °F).
Mechanical14
CC767S has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 400 MPa (58 ksi) — weaker than 69% of copper alloy grades. Elongation at break is 32% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
CC767S is rated for continuous service to 200°C (392 °F). It conducts heat at 105 W/m·K (60.7 BTU/hr·ft·°F), better than 56% of copper alloy grades. Thermal expansion is 20.5 µm/m·K (11.4 µin/in·°F).
Electrical3
CC767S conducts electricity at 20 % IACS, better than 52% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 86% of copper alloy grades.
Sustainability4
Producing a kilogram of CC767S takes about 47 MJ of energy and emits 3.1 kg of CO₂ — less than 93% of copper alloy grades. Typical recycled content is 70%.
Manufacturability8
CC767S's machinability is fair (45/100, better than 64% of copper alloy grades); weldability fair (40/100); formability poor (25/100).
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. CC767S is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CC767S
Is CC767S easy to machine?
Machines well with sharp positive-rake carbide and light feeds, but being essentially unleaded it produces stringy chips — expect ~40–50% of free-cutting HPb59-1 productivity.
Can CC767S be welded?
Fusion welding is limited by zinc volatilisation; use TIG with Cu-Si or Cu-Al filler, preheat lightly and provide fume extraction — silver brazing and soldering are preferred for joints.
Can CC767S be formed, bent or molded?
A casting alloy: excellent fluidity and pressure tightness in sand, permanent-mould, centrifugal and continuous casting; provide generous feeding and avoid overheating to limit Zn loss and coarse β grains.
CC767S 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 |
|---|---|---|
| Cuα-β brass matrix | 57 – 63 | 60 |
| Alstrengthener, improves fluidity and oxidation resistance | 0.3 – 1.3 | 0.8 |
| Fe | ≤ 0.8 | |
| Mn | ≤ 0.5 | |
| Ni | ≤ 1 | |
| Sn | ≤ 0.4 | |
| Pbmax; low-lead alloy | ≤ 0.5 | |
| Si | ≤ 0.1 | |
| Znremainder, ≈37–40% | balance |
What surface finishes work on CC767S?
Polishes to a bright yellow finish and takes nickel/chrome, tin or clear-lacquer coatings; use benzotriazole or chromate passivation for tarnish control — anodizing is not applicable.
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 CC767S in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CuZn38AI-C
How much does CC767S cost?
CC767S 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.
CC767S — frequently asked
What is CC767S used for?
CC767S is typically used for pump housings, valve bodies and structural castings. In short: most ductile aluminium cast brass; pressure-tight casting alloy; good fluidity, unleaded machining.
What is the yield strength of CC767S?
CC767S has a typical yield strength of 150 MPa (21.8 ksi) and a tensile strength of 400 MPa (58 ksi) — weaker than 69% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is CC767S easy to machine?
Reasonably — machinability is rated fair (45/100, better than 64% of copper alloy grades). Machines well with sharp positive-rake carbide and light feeds, but being essentially unleaded it produces stringy chips — expect ~40–50% of free-cutting HPb59-1 productivity.
Can CC767S be welded?
With care — weldability is rated fair (40/100). Fusion welding is limited by zinc volatilisation; use TIG with Cu-Si or Cu-Al filler, preheat lightly and provide fume extraction — silver brazing and soldering are preferred for joints.
What surface finishes work on CC767S?
Polishes to a bright yellow finish and takes nickel/chrome, tin or clear-lacquer coatings; use benzotriazole or chromate passivation for tarnish control — anodizing is not applicable.
Can CC767S be formed, bent or molded?
A casting alloy: excellent fluidity and pressure tightness in sand, permanent-mould, centrifugal and continuous casting; provide generous feeding and avoid overheating to limit Zn loss and coarse β grains.
What is the maximum service temperature of CC767S?
CC767S 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 CC767S-GS and CC767S-GC?
GS is the default condition — standard route for one-offs, large or complex housings and valve bodies; lowest strength but highest ductility. GC: semi-finished bar, hollow bar and tube stock for machined pressure-tight components; most uniform properties. Yield strength is 150 MPa in GS versus 200 MPa in GC.
How much does CC767S cost?
CC767S 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)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Copper alloy datasheets (CDA/copper.org) — Copper Development Association (2023)
- Cast copper alloy (special brass) foundry datasheets — European copper-alloy foundries (2023)
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.