Copper Alloy CC753S-GM (Permanent (gravity die) cast)
Finish state
EN CC753S
Choose for series production of small/medium parts needing finer grain, better surface and higher strength than sand casting.
Values for the GM condition
Other CC753S tempers and conditions
CC753S is listed in 4 conditions; see the grade overview at CC753S.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
GSDefault Sand cast | General-purpose route for medium and large valve/pump bodies and one-off or low-volume castings. | 150 | 320 | 18 | 80 HB | 20 % IACS |
GMThis page Permanent (gravity die) cast | Choose for series production of small/medium parts needing finer grain, better surface and higher strength than sand casting. | 180 | 360 | 15 | 90 HB | 19 % IACS |
Centrifugally cast | Best for bushings, sleeves and rings where a dense, inclusion-free bore and higher wear strength are required. | 190 | 390 | 15 | 95 HB | 19 % IACS |
Continuously cast bar/tube | Stock form for machined bushings, nuts and gear blanks — most uniform structure and best machining yield. | 200 | 390 | 15 | 95 HB | 20 % IACS |
What is CC753S-GM?
CC753S-GM is CC753S supplied in the GM condition — choose for series production of small/medium parts needing finer grain, better surface and higher strength than sand casting. CC753S-GM has a yield strength of 180 MPa (26.1 ksi) and a tensile strength of 360 MPa (52.2 ksi) — weaker than 59% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 97 GPa (14.1 Msi). CC753S-GM has a density of 8.4 g/cm³ (0.303 lb/in³), lighter than 75% of copper alloy grades. It melts at 880°C (1,616 °F). GS is the default condition FabDigit quotes; GM is available on request or by drawing note.
Advantages
- Easy to machine — 78/100, better than 82% of copper alloy grades
Limitations
- Low stiffness — 97 GPa (14.1 Msi), worse than 88% of copper alloy grades
- Hard to polish — 65/100, worse than 87% of copper alloy grades
- Limited formability — 15/100, worse than 79% of copper alloy grades
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
CC753S-GM properties
Typical room-temperature values for CC753S-GM; 21 are specific to this condition. Other listed values are CC753S reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
CC753S-GM has a density of 8.4 g/cm³ (0.303 lb/in³), lighter than 75% of copper alloy grades. It melts at 880°C (1,616 °F).
Mechanical15
CC753S-GM has a yield strength of 180 MPa (26.1 ksi) and a tensile strength of 360 MPa (52.2 ksi) — weaker than 59% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 97 GPa (14.1 Msi).
Thermal6
CC753S-GM is rated for continuous service to 200°C (392 °F). It conducts heat at 98 W/m·K (56.6 BTU/hr·ft·°F), better than 54% of copper alloy grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
CC753S-GM conducts electricity at 19 % IACS, better than 51% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (57/100), worse than 80% of copper alloy grades.
Sustainability4
Producing a kilogram of CC753S-GM takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 80%.
Manufacturability8
CC753S-GM's machinability is very good (78/100, better than 82% of copper alloy grades); weldability poor (25/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CC753S-GM
Is CC753S easy to machine?
Machines freely with sharp carbide or HSS at high speed and light feed; Al/Fe/Ni raise cutting forces versus plain leaded brass, use 0° to slightly positive rake and emulsion coolant.
Can CC753S be welded?
Not recommended for structural welding — lead causes hot cracking and Zn fumes; repair by brazing or TIG with silicon-bronze filler on preheated, cleaned metal only.
Can CC753S be formed, bent or molded?
Casting alloy: pour 980–1050 °C with good gating and risers, degas and stir minimally to avoid Al oxide films; no cold forming.
What surface finishes work on CC753S?
Takes tin, nickel and chrome plating well after alkaline cleaning; polish to bright finish and lacquer or chromate-passivate to prevent tarnish; do not anodize.
CC753S 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 – 60 | 58.5 |
| Pbfree-machining phase | 1 – 2.5 | 2 |
| Ni | 0.5 – 1.5 | 1 |
| Alβ-stabiliser, strength | 0.3 – 1.3 | 0.8 |
| Fegrain refinement / wear | 0.3 – 1.5 | 0.8 |
| Mn | ≤ 0.5 | 0.2 |
| Snimpurity limit | ≤ 0.4 | 0.2 |
| Siimpurity limit | ≤ 0.1 | — |
| Zn | balance | — |
CC753S-GM — frequently asked
What is CC753S-GM used for?
CC753S-GM is typically used for gear housings, marine fittings and wear-resistant castings. In short: higher-strength leaded cast brass; wear-resistant casting grade; free-machining, not weldable.
What is the yield strength of CC753S-GM?
CC753S-GM has a typical yield strength of 180 MPa (26.1 ksi) and a tensile strength of 360 MPa (52.2 ksi) — weaker than 59% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is CC753S-GM easy to machine?
Yes — machinability is rated very good (78/100, better than 82% of copper alloy grades). Machines freely with sharp carbide or HSS at high speed and light feed; Al/Fe/Ni raise cutting forces versus plain leaded brass, use 0° to slightly positive rake and emulsion coolant.
Can CC753S-GM be welded?
Not readily — weldability is rated poor (25/100). Not recommended for structural welding — lead causes hot cracking and Zn fumes; repair by brazing or TIG with silicon-bronze filler on preheated, cleaned metal only.
What surface finishes work on CC753S-GM?
Takes tin, nickel and chrome plating well after alkaline cleaning; polish to bright finish and lacquer or chromate-passivate to prevent tarnish; do not anodize.
Can CC753S-GM be formed, bent or molded?
Casting alloy: pour 980–1050 °C with good gating and risers, degas and stir minimally to avoid Al oxide films; no cold forming.
What is the maximum service temperature of CC753S-GM?
CC753S-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 CC753S-GS and CC753S-GC?
GS is the default condition — general-purpose route for medium and large valve/pump bodies and one-off or low-volume castings. GC: stock form for machined bushings, nuts and gear blanks — most uniform structure and best machining yield. Yield strength is 150 MPa in GS versus 200 MPa in GC.
Sources
- EN 1982 — Copper and copper alloys: Ingots and castings — CEN (2017)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- CDA / copper.org cast copper alloy datasheets — Copper Development Association (2023)
- Continuous-cast brass bushing stock datasheets — European copper-alloy 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.