Copper Alloy CC334G-TA
Heat-treated state
EN CC334G
TA = temper annealed (≈675 °C, air cooled) after casting
Specify for long-term seawater service or welded castings — redistributes beta/kappa phases, relieves stress and improves dealuminification resistance at slightly lower hardness.
Values for the TA condition
Other CC334G tempers and conditions
CC334G is listed in 5 conditions; see the grade overview at CC334G.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
TAThis page Temper annealed (≈675 °C, air cooled) after casting | Specify for long-term seawater service or welded castings — redistributes beta/kappa phases, relieves stress and improves dealuminification resistance at slightly lower hardness. | 430 | 700 | 8 | 22 HRC | 7.5 % IACS |
GSDefault Sand cast | Default route for one-off and thick-section castings such as wear plates, gibs and large bushes. | 450 | 710 | 6 | 24 HRC | 7 % IACS |
Continuously cast bar/tube | Stock bar and tube for machined bushes and slide components with uniform, low-porosity structure. | 470 | 740 | 5 | 25 HRC | 7 % IACS |
Centrifugally cast | Standard route for bushes, sleeves, wear rings and gear blanks — dense, porosity-free tubular sections. | 490 | 760 | 5 | 26 HRC | 7 % IACS |
Chill / permanent-mould cast | Pick for repeat small-to-medium parts where the faster chill gives a finer structure and the highest hardness. | 500 | 760 | 5 | 27 HRC | 7 % IACS |
What is CC334G-TA?
CC334G-TA is CC334G heat treated to TA — specify for long-term seawater service or welded castings — redistributes beta/kappa phases, relieves stress and improves dealuminification resistance at slightly lower hardness. CC334G-TA has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 84% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 122 GPa (17.7 Msi). CC334G-TA has a density of 7.45 g/cm³ (0.269 lb/in³), lighter than 99% of copper alloy grades. It melts at 1,030°C (1,886 °F). GS is the default condition FabDigit quotes; TA is available on request or by drawing note.
Advantages
- Lightweight — 7.45 g/cm³ (0.269 lb/in³), better than 99% of copper alloy grades
- Good corrosion resistance — 82/100, better than 98% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
- High strength — 430 MPa (62.4 ksi), better than 84% of copper alloy grades
Limitations
- Limited formability — 7/100, worse than 96% of copper alloy grades
- Low fracture toughness — 32 MPa·√m (29.1 ksi·√in), worse than 85% of copper alloy grades
- Low electrical conductivity — 7.5 % IACS, worse than 84% of copper alloy grades
- Limited ductility — 8%, worse than 83% of copper alloy grades
- Poor heat conductor — 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 82% of copper alloy grades
CC334G-TA properties
Typical room-temperature values for CC334G-TA; 22 are specific to this condition. Other listed values are CC334G reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
CC334G-TA has a density of 7.45 g/cm³ (0.269 lb/in³), lighter than 99% of copper alloy grades. It melts at 1,030°C (1,886 °F).
Mechanical17
CC334G-TA has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 84% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 122 GPa (17.7 Msi).
Thermal6
CC334G-TA is rated for continuous service to 300°C (572 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 82% of copper alloy grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
CC334G-TA conducts electricity at 7.5 % IACS, worse than 84% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 98% of copper alloy grades.
Sustainability4
Producing a kilogram of CC334G-TA takes about 55 MJ of energy and emits 3.8 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 45%.
Manufacturability8
CC334G-TA's machinability is poor (28/100, worse than 78% of copper alloy grades); weldability fair (45/100); formability not recommended (7/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CC334G-TA
Is CC334G easy to machine?
Hard and gummy — use rigid setups, sharp carbide (or PCD for finishing), low-to-moderate speeds, heavy positive rake and generous coolant; expect roughly a quarter of free-cutting brass productivity.
Can CC334G be welded?
GTAW/GMAW with matching NAB filler (e.g. ECuAl-A2/AlBz-Ni) works but needs 150–250 °C preheat, clean oxide removal and preferably a 675 °C temper anneal afterwards; heavy sections are crack-sensitive.
Can CC334G be formed, bent or molded?
Casting alloy only — no cold forming; pour at about 1120–1180 °C with quiet, bottom-filled gating and generous feeders to avoid oxide films and shrinkage in heavy sections.
What surface finishes work on CC334G?
Not anodisable; machine or grind to size, then leave bare (self-protecting oxide), passivate, or apply hard-chrome/PTFE-type coatings only where sliding contact demands it — polishes to a bright bronze finish.
CC334G 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 |
|---|---|---|
| Alprimary strengthener; drives kappa/beta phase content | 10.5 – 12.5 | 11.5 |
| Fegrain refiner, forms hard kappa particles | 4 – 6.5 | 6 |
| Nistabilises structure, improves corrosion and hot strength | 4 – 6.5 | 6 |
| Mn | ≤ 2.5 | 1 |
| Si | ≤ 0.15 | — |
| Zn | ≤ 0.5 | — |
| Sn | ≤ 0.1 | — |
| Pb | ≤ 0.05 | — |
| Curemainder, approx. 74–79 % | balance | — |
CC334G-TA — frequently asked
What is CC334G-TA used for?
CC334G-TA is typically used for heavy-duty gears, high-load bushings, propeller bosses and wear-resistant machine parts. In short: hardest cast aluminum bronze; 250 HB wear surface; low ductility, 6 % elongation.
What is the yield strength of CC334G-TA?
CC334G-TA has a typical yield strength of 430 MPa (62.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 84% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is CC334G-TA easy to machine?
Not especially — machinability is rated poor (28/100, worse than 78% of copper alloy grades). Hard and gummy — use rigid setups, sharp carbide (or PCD for finishing), low-to-moderate speeds, heavy positive rake and generous coolant; expect roughly a quarter of free-cutting brass productivity.
Can CC334G-TA be welded?
With care — weldability is rated fair (45/100). GTAW/GMAW with matching NAB filler (e.g. ECuAl-A2/AlBz-Ni) works but needs 150–250 °C preheat, clean oxide removal and preferably a 675 °C temper anneal afterwards; heavy sections are crack-sensitive.
What surface finishes work on CC334G-TA?
Not anodisable; machine or grind to size, then leave bare (self-protecting oxide), passivate, or apply hard-chrome/PTFE-type coatings only where sliding contact demands it — polishes to a bright bronze finish.
Can CC334G-TA be formed, bent or molded?
Casting alloy only — no cold forming; pour at about 1120–1180 °C with quiet, bottom-filled gating and generous feeders to avoid oxide films and shrinkage in heavy sections.
What is the maximum service temperature of CC334G-TA?
CC334G-TA 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 CC334G-GS and CC334G-GM?
GS is the default condition — default route for one-off and thick-section castings such as wear plates, gibs and large bushes. GM: pick for repeat small-to-medium parts where the faster chill gives a finer structure and the highest hardness. Yield strength is 450 MPa in GS versus 500 MPa in GM.
Sources
- EN 1982 — Copper and copper alloys: ingots and castings — CEN (2017)
- ASTM B505/B505M — Continuous Cast Copper Alloys (C95900) — ASTM International (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (Copper alloys in seawater) — ASM International (2005)
- CDA alloy datasheet C95900 / nickel-aluminium bronze castings — Copper Development Association (2023)
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.