Copper Alloy CC754S-GM
Finish state · default condition
EN CC754S
GM = gravity (permanent mould) die cast
Default commercial condition: finer grain and higher strength than sand casting, good for valve bodies and fittings in medium-to-high volume.
Values for the GM condition
Other CC754S tempers and conditions
CC754S is listed in 5 conditions; see the grade overview at CC754S.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Sand cast | Choose for one-off or large, thick-walled castings where dimensional tolerance is loose and strength demand is modest. | 120 | 300 | 22 | 80 HB | 24 % IACS |
GMDefaultThis page Gravity (permanent mould) die cast | Default commercial condition: finer grain and higher strength than sand casting, good for valve bodies and fittings in medium-to-high volume. | 150 | 380 | 20 | 95 HB | 25 % IACS |
Centrifugal cast | Choose for rings, bushes, sleeves and hollow rotational parts needing dense, porosity-free walls. | 160 | 380 | 18 | 95 HB | 25 % IACS |
Continuous cast | Choose for semi-finished bar, tube and hollow stock to be machined into fittings and bushings. | 160 | 380 | 18 | 95 HB | 25 % IACS |
Pressure die cast | Choose for high-volume thin-wall fittings and sanitary hardware needing near-net shape and best surface; ductility is the lowest of the forms. | 180 | 400 | 10 | 105 HB | 24 % IACS |
What is CC754S-GM?
CC754S-GM is CC754S supplied in the GM condition — default commercial condition: finer grain and higher strength than sand casting, good for valve bodies and fittings in medium-to-high volume. CC754S-GM has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 380 MPa (55.1 ksi) — weaker than 69% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 95 GPa (13.8 Msi). CC754S-GM has a density of 8.4 g/cm³ (0.303 lb/in³), lighter than 75% of copper alloy grades. It melts at 885°C (1,625 °F).
Advantages
- Easy to machine — 80/100, better than 86% of copper alloy grades
Limitations
- Low stiffness — 95 GPa (13.8 Msi), worse than 93% of copper alloy grades
- Needs corrosion protection — 52/100, worse than 93% of copper alloy grades
- Low fracture toughness — 33 MPa·√m (30 ksi·√in), worse than 85% of copper alloy grades
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
CC754S-GM properties
Typical room-temperature values for CC754S-GM; 21 are specific to this condition. Other listed values are CC754S reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
CC754S-GM has a density of 8.4 g/cm³ (0.303 lb/in³), lighter than 75% of copper alloy grades. It melts at 885°C (1,625 °F).
Mechanical15
CC754S-GM has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 380 MPa (55.1 ksi) — weaker than 69% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 95 GPa (13.8 Msi).
Thermal6
CC754S-GM 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 20.8 µm/m·K (11.6 µin/in·°F).
Electrical3
CC754S-GM conducts electricity at 25 % IACS, better than 59% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is fair (52/100), worse than 93% of copper alloy grades.
Sustainability4
Producing a kilogram of CC754S-GM takes about 55 MJ of energy and emits 3.4 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 70%.
Manufacturability8
CC754S-GM's machinability is very good (80/100, better than 86% of copper alloy grades); weldability poor (25/100); formability poor (22/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CC754S-GM
Is CC754S easy to machine?
Free-machining: use zero-to-slightly-negative rake carbide or HSS tools, high speed, light feed, minimal coolant; chips are short and break cleanly.
Can CC754S be welded?
Poor fusion weldability — zinc and lead volatilise causing porosity and hot cracking; join by brazing/soldering with flux and adequate fume extraction instead.
Can CC754S be formed, bent or molded?
Casting alloy with excellent fluidity in sand, permanent-mould, centrifugal, continuous and pressure die casting; keep pouring 1000–1050 °C, use degassing and generous risering, and avoid cold work on the α+β structure.
What surface finishes work on CC754S?
Takes bright polish, and nickel/chrome or lacquer finishes readily; not anodisable — pickle/passivate with benzotriazole inhibitor to prevent tarnish, and specify inhibited grades or dezincification-resistant alloys for potable water.
CC754S 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 | 57 – 59 | 58 |
| Pbmachinability | 0.5 – 1.5 | 1 |
| Alfluidity / oxidation control | 0.2 – 0.8 | 0.5 |
| Feimpurity limit | ≤ 0.8 | — |
| Mnimpurity limit | ≤ 0.5 | — |
| Niimpurity limit | ≤ 0.5 | — |
| Snimpurity limit | ≤ 0.4 | — |
| Siimpurity limit | ≤ 0.05 | — |
| others totalsum of unlisted elements | ≤ 0.2 | — |
| Zn | balance | — |
CC754S-GM — frequently asked
What is CC754S-GM used for?
CC754S-GM is typically used for fittings, electrical hardware and general castings. In short: high-fluidity leaded cast brass; die-castable general-purpose grade; free-machining, poor weldability.
What is the yield strength of CC754S-GM?
CC754S-GM has a typical yield strength of 150 MPa (21.8 ksi) and a tensile strength of 380 MPa (55.1 ksi) — weaker than 69% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is CC754S-GM easy to machine?
Yes — machinability is rated very good (80/100, better than 86% of copper alloy grades). Free-machining: use zero-to-slightly-negative rake carbide or HSS tools, high speed, light feed, minimal coolant; chips are short and break cleanly.
Can CC754S-GM be welded?
Not readily — weldability is rated poor (25/100). Poor fusion weldability — zinc and lead volatilise causing porosity and hot cracking; join by brazing/soldering with flux and adequate fume extraction instead.
What surface finishes work on CC754S-GM?
Takes bright polish, and nickel/chrome or lacquer finishes readily; not anodisable — pickle/passivate with benzotriazole inhibitor to prevent tarnish, and specify inhibited grades or dezincification-resistant alloys for potable water.
Can CC754S-GM be formed, bent or molded?
Casting alloy with excellent fluidity in sand, permanent-mould, centrifugal, continuous and pressure die casting; keep pouring 1000–1050 °C, use degassing and generous risering, and avoid cold work on the α+β structure.
What is the maximum service temperature of CC754S-GM?
CC754S-GM 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 CC754S-GM and CC754S-GS?
GM is the default condition — default commercial condition: finer grain and higher strength than sand casting, good for valve bodies and fittings in medium-to-high volume. GS: choose for one-off or large, thick-walled castings where dimensional tolerance is loose and strength demand is modest. Yield strength is 150 MPa in GM versus 120 MPa in GS.
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 (cast brasses) — Copper Development Association (2023)
- Cast leaded brass CuZn39Pb1Al-C foundry data — European brass foundries (2022)
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.