Copper Alloy CC330G-GM (Permanent mould (chill) cast)
Finish state
EN CC330G
Choose for medium-series small/medium parts where the finer chill-cast grain gives ~10 % higher strength and better surface.
Values for the GM condition
Other CC330G tempers and conditions
CC330G is listed in 5 conditions; see the grade overview at CC330G.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Applied after welding or heavy machining to relieve residual stress and homogenise α; slightly softer, more ductile, better dimensional stability. | 185 | 480 | 30 | 100 HB | 14 % IACS |
GSDefault Sand cast | Standard route for pump/valve bodies and large one-off housings; lowest cooling rate, coarsest grain, highest ductility relative to strength. | 200 | 500 | 25 | 110 HB | 13 % IACS |
Continuously cast bar/tube | Stock semi-finished bar and hollow for machined bushings and fittings; uniform fine structure and best machining consistency. | 215 | 540 | 25 | 115 HB | 13 % IACS |
GMThis page Permanent mould (chill) cast | Choose for medium-series small/medium parts where the finer chill-cast grain gives ~10 % higher strength and better surface. | 220 | 550 | 25 | 120 HB | 13 % IACS |
Centrifugally cast | Best for bushings, sleeves and ring-shaped valve seats — dense, dross-free wall with directional solidification. | 220 | 550 | 25 | 120 HB | 13 % IACS |
What is CC330G-GM?
CC330G-GM is CC330G supplied in the GM condition — choose for medium-series small/medium parts where the finer chill-cast grain gives ~10 % higher strength and better surface. CC330G-GM has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 51% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 115 GPa (16.7 Msi). CC330G-GM has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 93% of copper alloy grades. It melts at 1,030°C (1,886 °F). GS is the default condition FabDigit quotes; GM is available on request or by drawing note.
Advantages
- Lightweight — 7.6 g/cm³ (0.275 lb/in³), better than 93% of copper alloy grades
- Readily welded — 76/100, better than 91% of copper alloy grades
- Good corrosion resistance — 75/100, better than 90% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
CC330G-GM properties
Typical room-temperature values for CC330G-GM; 22 are specific to this condition. Other listed values are CC330G reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
CC330G-GM has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 93% of copper alloy grades. It melts at 1,030°C (1,886 °F).
Mechanical16
CC330G-GM has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 51% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 115 GPa (16.7 Msi).
Thermal6
CC330G-GM is rated for continuous service to 300°C (572 °F). It conducts heat at 59 W/m·K (34.1 BTU/hr·ft·°F), worse than 61% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
CC330G-GM conducts electricity at 13 % IACS, worse than 58% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (75/100), better than 90% of copper alloy grades.
Sustainability4
Producing a kilogram of CC330G-GM takes about 55 MJ of energy and emits 3.8 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 50%.
Manufacturability8
CC330G-GM's machinability is fair (40/100, better than 57% of copper alloy grades); weldability very good (76/100); formability poor (24/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CC330G-GM
Is CC330G easy to machine?
Gummy, continuous chips — use sharp positive-rake carbide, moderate speed (60–120 m/min), heavy feed and flood coolant; rates about 40–50 % of free-cutting brass.
Can CC330G be welded?
One of the most weldable cast bronzes: GTAW/GMAW with CuAl9 (ERCuAl-A2) filler, preheat 150–250 °C on heavy sections, remove oxide film and interpass dross carefully.
Can CC330G be formed, bent or molded?
Cast only — bottom gate with generous risers, degassed and skim-protected melt to control Al₂O₃ dross; avoid slow cooling in heavy sections to limit γ2 and dealuminification risk.
What surface finishes work on CC330G?
Not anodizable; take a good mechanical polish, accepts tin, nickel or electroless-Ni plating after thorough oxide removal, or epoxy paint for atmospheric service.
CC330G 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 |
|---|---|---|
| Al | 8 – 10.5 | 9 |
| Feresidual; higher Fe refines grain | ≤ 1 | 0.4 |
| MnZCuAl9Mn2 variant runs Mn 1.5–2.5 | ≤ 1 | 0.3 |
| Ni | ≤ 1 | 0.2 |
| Si | ≤ 0.2 | — |
| Sn | ≤ 0.1 | — |
| Zn | ≤ 0.5 | — |
| Pbkept low to avoid hot cracking | ≤ 0.05 | — |
| Curemainder, approx. 88–91 % | balance | — |
CC330G-GM — frequently asked
What is CC330G-GM used for?
CC330G-GM is typically used for valve bodies, pump housings, marine fittings and bushings. In short: most weldable cast bronze; low-cost aluminium bronze casting; 500 MPa with 25% elongation.
What is the yield strength of CC330G-GM?
CC330G-GM has a typical yield strength of 220 MPa (31.9 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 51% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is CC330G-GM easy to machine?
Not especially — machinability is rated fair (40/100, better than 57% of copper alloy grades). Gummy, continuous chips — use sharp positive-rake carbide, moderate speed (60–120 m/min), heavy feed and flood coolant; rates about 40–50 % of free-cutting brass.
Can CC330G-GM be welded?
Yes — weldability is rated very good (76/100). One of the most weldable cast bronzes: GTAW/GMAW with CuAl9 (ERCuAl-A2) filler, preheat 150–250 °C on heavy sections, remove oxide film and interpass dross carefully.
What surface finishes work on CC330G-GM?
Not anodizable; take a good mechanical polish, accepts tin, nickel or electroless-Ni plating after thorough oxide removal, or epoxy paint for atmospheric service.
Can CC330G-GM be formed, bent or molded?
Cast only — bottom gate with generous risers, degassed and skim-protected melt to control Al₂O₃ dross; avoid slow cooling in heavy sections to limit γ2 and dealuminification risk.
What is the maximum service temperature of CC330G-GM?
CC330G-GM is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CC330G-GS and CC330G-GM?
GS is the default condition — standard route for pump/valve bodies and large one-off housings; lowest cooling rate, coarsest grain, highest ductility relative to strength. GM: choose for medium-series small/medium parts where the finer chill-cast grain gives ~10 % higher strength and better surface. Yield strength is 200 MPa in GS versus 220 MPa in GM.
Sources
- EN 1982 — Copper and copper alloys: Ingots and castings — CEN (2017)
- ASTM B148 — Aluminum-Bronze Sand Castings (C95200) — ASTM (2018)
- GB/T 1176 — (ZCuAl9Mn2) — SAC (2013)
- CDA Alloy Datasheet C95200 — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties and Selection: 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.