Copper Alloy CC750S
EN CC750S
CC750S (CuZn33Pb2-C) is a general-purpose leaded yellow brass casting alloy, with about 33 % zinc for castability and 2 % lead for free-cutting chip control.
Reference datasheet — CC750S 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
CC750S tempers and conditions
CC750S 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 | Default condition for general hardware, decorative and low-pressure fittings poured in sand or shell moulds. | 90 | 210 | 18 | 55 HB | 26 % IACS |
Continuously cast bar / tube | Best when the part will be fully machined from stock: continuous-cast bar and hollow give uniform, sound structure with free-cutting behaviour. | 105 | 240 | 16 | 62 HB | 26 % IACS |
Permanent (metal) mould cast, gravity die | Pick for higher-volume small parts needing better surface, tighter tolerance and ~20 % higher strength from the finer chill structure. | 110 | 250 | 15 | 65 HB | 26 % IACS |
Centrifugally cast | Choose for rings, bushings and sleeve blanks where centrifugal packing gives dense, low-porosity walls. | 110 | 250 | 16 | 65 HB | 26 % IACS |
What is CC750S?
CC750S (CuZn33Pb2-C) is a general-purpose leaded yellow brass casting alloy, with about 33 % zinc for castability and 2 % lead for free-cutting chip control. As-cast properties are around 90 MPa yield, 210 MPa tensile, 18 % elongation and 55 HB, with 26 % IACS electrical conductivity and a maximum service temperature of 200 °C, in sand (GS), gravity die (GM), centrifugal (GZ) and continuous (GC) cast forms. It is used for hardware and decorative castings rather than loaded pressure parts; the lead and zinc make fusion welding impractical and lead-restricted plumbing may exclude it. CC751S is the nearer choice when better fluidity and pressure tightness are needed. CC750S has a density of 8.5 g/cm³ (0.307 lb/in³), lighter than 65% of copper alloy grades. It melts at 900°C (1,652 °F). CC750S has a yield strength of 90 MPa (13.1 ksi) and a tensile strength of 210 MPa (30.5 ksi) — weaker than 88% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 95 GPa (13.8 Msi).
What is CC750S used for?
- hardware fittings
- decorative castings
- plumbing components
Advantages
- Easy to machine — 85/100, better than 93% of copper alloy grades
- Low embodied carbon — 3.2 kg CO₂/kg, better than 92% of copper alloy grades
Limitations
- Needs corrosion protection — 50/100, worse than 95% of copper alloy grades
- Low stiffness — 95 GPa (13.8 Msi), worse than 93% of copper alloy grades
- Low strength — 90 MPa (13.1 ksi), worse than 88% of copper alloy grades
- Difficult to weld — 20/100, worse than 88% of copper alloy grades
CC750S properties
Typical room-temperature values for CC750S-GS; bars are the position among copper alloy grades.
Physical3
CC750S has a density of 8.5 g/cm³ (0.307 lb/in³), lighter than 65% of copper alloy grades. It melts at 900°C (1,652 °F).
Mechanical15
CC750S has a yield strength of 90 MPa (13.1 ksi) and a tensile strength of 210 MPa (30.5 ksi) — weaker than 88% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 95 GPa (13.8 Msi).
Thermal6
CC750S is rated for continuous service to 200°C (392 °F). It conducts heat at 115 W/m·K (66.4 BTU/hr·ft·°F), better than 61% of copper alloy grades. Thermal expansion is 20.5 µm/m·K (11.4 µin/in·°F).
Electrical3
CC750S conducts electricity at 26 % IACS, better than 63% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is fair (50/100), worse than 95% of copper alloy grades.
Sustainability4
Producing a kilogram of CC750S takes about 45 MJ of energy and emits 3.2 kg of CO₂ — less than 97% of copper alloy grades. Typical recycled content is 85%.
Manufacturability8
CC750S's machinability is excellent (85/100, better than 93% of copper alloy grades); weldability poor (20/100); formability poor (20/100).
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. CC750S is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CC750S
Is CC750S easy to machine?
Free-cutting: high speeds with sharp zero/negative-rake carbide or HSS tools, light feeds, water-soluble coolant; chips break short thanks to the 2 % Pb, but extract lead-bearing dust.
Can CC750S be welded?
Not recommended for fusion welding — zinc fumes and lead-induced hot cracking; repair by brazing with low-temperature Ag or Cu-P filler, or mechanically join.
Can CC750S be formed, bent or molded?
Casting alloy with excellent fluidity and low shrinkage; use generous fillets, chill or feed heavy sections, degas the melt and cover with charcoal/flux to limit zinc loss; avoid cold forming of finished castings.
CC750S 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 | 63 – 67 | 65 |
| Pbfree-machining constituent | 1 – 3 | 2 |
| Sn | ≤ 1 | 0.3 |
| Fe | ≤ 0.8 | 0.2 |
| Ni | ≤ 1 | 0.2 |
| Al | ≤ 0.5 | 0.05 |
| Mn | ≤ 0.5 | 0.05 |
| Sb | ≤ 0.1 | |
| Si | ≤ 0.05 | |
| others (total)sum of unlisted impurities | ≤ 1 | |
| Znremainder, nominally 31–35 % | balance |
What surface finishes work on CC750S?
Buffs to bright brass, takes lacquer, chemical patina and Ni/Cr or brass electroplating; not anodisable, and porosity or lead smearing can pit a plated finish if not pre-cleaned.
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 CC750S in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CuZn33Pb2-C
How much does CC750S cost?
CC750S is a premium-cost copper alloy ($$$), cheaper than about 51% 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.
CC750S — frequently asked
What is CC750S used for?
CC750S is typically used for hardware fittings, decorative castings and plumbing components. In short: baseline leaded casting brass; free-cutting and easy to plate; good castability, modest strength.
What is the yield strength of CC750S?
CC750S has a typical yield strength of 90 MPa (13.1 ksi) and a tensile strength of 210 MPa (30.5 ksi) — weaker than 88% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is CC750S easy to machine?
Yes — machinability is rated excellent (85/100, better than 93% of copper alloy grades). Free-cutting: high speeds with sharp zero/negative-rake carbide or HSS tools, light feeds, water-soluble coolant; chips break short thanks to the 2 % Pb, but extract lead-bearing dust.
Can CC750S be welded?
Not readily — weldability is rated poor (20/100). Not recommended for fusion welding — zinc fumes and lead-induced hot cracking; repair by brazing with low-temperature Ag or Cu-P filler, or mechanically join.
What surface finishes work on CC750S?
Buffs to bright brass, takes lacquer, chemical patina and Ni/Cr or brass electroplating; not anodisable, and porosity or lead smearing can pit a plated finish if not pre-cleaned.
Can CC750S be formed, bent or molded?
Casting alloy with excellent fluidity and low shrinkage; use generous fillets, chill or feed heavy sections, degas the melt and cover with charcoal/flux to limit zinc loss; avoid cold forming of finished castings.
What is the maximum service temperature of CC750S?
CC750S 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 CC750S-GS and CC750S-GM?
GS is the default condition — default condition for general hardware, decorative and low-pressure fittings poured in sand or shell moulds. GM: pick for higher-volume small parts needing better surface, tighter tolerance and ~20 % higher strength from the finer chill structure. Yield strength is 90 MPa in GS versus 110 MPa in GM.
How much does CC750S cost?
CC750S is a premium-cost copper alloy ($$$), cheaper than about 51% 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)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- DKI Kupfer-Werkstoff-Datenblätter (Cu-Zn-Pb Gusslegierungen) — Deutsches Kupferinstitut (2020)
- Copper Alloy Datasheets / machinability ratings — Copper Development Association (copper.org) (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.