Copper Alloy CC382H-GM (Permanent (gravity die) cast)
Finish state
EN CC382H
Chill-cast small/medium parts; finer structure gives slightly higher strength than sand casting.
Values for the GM condition
Other CC382H tempers and conditions
CC382H is listed in 5 conditions; see the grade overview at CC382H.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
GSDefault Sand cast, as-cast | Standard sand-cast condition for pump casings, valve bodies and large marine castings. | 275 | 470 | 20 | 130 HB | 4.2 % IACS |
GMThis page Permanent (gravity die) cast | Chill-cast small/medium parts; finer structure gives slightly higher strength than sand casting. | 290 | 490 | 20 | 135 HB | 4.2 % IACS |
Centrifugally cast | Choose for seamless rings, bushings, pump wear rings and tube blanks needing dense, pore-free metal. | 300 | 500 | 22 | 140 HB | 4.2 % IACS |
Continuously cast bar/tube | Continuous-cast stock for machined valve components and shafts; most uniform, lowest-porosity form. | 310 | 500 | 20 | 140 HB | 4.2 % IACS |
Solution treated and precipitation aged | Optional Cr/Si precipitation ageing when maximum strength and cavitation/wear resistance are required, at the cost of ductility. | 390 | 600 | 13 | 175 HB | 4.6 % IACS |
What is CC382H-GM?
CC382H-GM is CC382H supplied in the GM condition — chill-cast small/medium parts; finer structure gives slightly higher strength than sand casting. CC382H-GM has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 490 MPa (71.1 ksi) — stronger than 60% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 150 GPa (21.8 Msi). CC382H-GM has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 1,180°C (2,156 °F). GS is the default condition FabDigit quotes; GM is available on request or by drawing note.
Advantages
- Stiff — 150 GPa (21.8 Msi), better than 98% 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
- Readily welded — 65/100, better than 80% of copper alloy grades
Limitations
- Poor heat conductor — 26 W/m·K (15 BTU/hr·ft·°F), worse than 98% of copper alloy grades
- Low electrical conductivity — 4.2 % IACS, worse than 98% of copper alloy grades
- Difficult to machine — 22/100, worse than 94% of copper alloy grades
- High embodied carbon — 6.5 kg CO₂/kg, worse than 94% of copper alloy grades
- Limited formability — 10/100, worse than 89% of copper alloy grades
CC382H-GM properties
Typical room-temperature values for CC382H-GM; 20 are specific to this condition. Other listed values are CC382H reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
CC382H-GM has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 1,180°C (2,156 °F).
Mechanical14
CC382H-GM has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 490 MPa (71.1 ksi) — stronger than 60% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 150 GPa (21.8 Msi).
Thermal6
CC382H-GM is rated for continuous service to 300°C (572 °F). It conducts heat at 26 W/m·K (15 BTU/hr·ft·°F), worse than 98% of copper alloy grades. Thermal expansion is 15.5 µm/m·K (8.61 µin/in·°F).
Electrical3
CC382H-GM conducts electricity at 4.2 % IACS, worse than 98% 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 CC382H-GM takes about 85 MJ of energy and emits 6.5 kg of CO₂ — more than 92% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
CC382H-GM's machinability is poor (22/100, worse than 94% of copper alloy grades); weldability good (65/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CC382H-GM
Is CC382H easy to machine?
Gummy and work-hardening — use sharp positive-rake carbide, heavy feed, low-to-moderate speed (40–70 m/min) and copious coolant; avoid dwelling to prevent glazing.
Can CC382H be welded?
Weldable by GTAW/GMAW with 70/30 Cu-Ni-Nb (ERCuNi) filler, no preheat, low interpass temperature; keep the melt free of sulphur, lead and phosphorus to avoid hot cracking.
Can CC382H be formed, bent or molded?
Casting grade only — pour hot with deoxidation (Mn/Si, avoid P), use generous risers and chills because of the long freezing range and high shrinkage (~2%).
What surface finishes work on CC382H?
Not anodizable; pickle/passivate after casting, allow a natural protective oxide film to form in clean seawater, and use epoxy or antifouling coatings only where required above waterline.
CC382H 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 |
|---|---|---|
| NiCo counted with Ni | 29 – 32 | 30.5 |
| Crprincipal strengthening addition | 1.5 – 2.5 | 2 |
| Fe | 0.4 – 1 | 0.7 |
| Mn | 0.5 – 1.5 | 1 |
| Siwith Cr forms strengthening phase | 0.15 – 0.5 | 0.3 |
| C | ≤ 0.1 | — |
| Pbmax — hot-cracking sensitive | ≤ 0.01 | — |
| S | ≤ 0.02 | — |
| P | ≤ 0.02 | — |
| Zn | ≤ 0.5 | — |
| Cu | balance | — |
CC382H-GM — frequently asked
What is CC382H-GM used for?
CC382H-GM is typically used for high-strength propellers, seawater pump impellers and naval fittings. In short: highest-hardness cast Cu-Ni; chromium-strengthened 30 % Ni; heat-treatable casting grade.
What is the yield strength of CC382H-GM?
CC382H-GM has a typical yield strength of 290 MPa (42.1 ksi) and a tensile strength of 490 MPa (71.1 ksi) — stronger than 60% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is CC382H-GM easy to machine?
Not especially — machinability is rated poor (22/100, worse than 94% of copper alloy grades). Gummy and work-hardening — use sharp positive-rake carbide, heavy feed, low-to-moderate speed (40–70 m/min) and copious coolant; avoid dwelling to prevent glazing.
Can CC382H-GM be welded?
Yes — weldability is rated good (65/100). Weldable by GTAW/GMAW with 70/30 Cu-Ni-Nb (ERCuNi) filler, no preheat, low interpass temperature; keep the melt free of sulphur, lead and phosphorus to avoid hot cracking.
What surface finishes work on CC382H-GM?
Not anodizable; pickle/passivate after casting, allow a natural protective oxide film to form in clean seawater, and use epoxy or antifouling coatings only where required above waterline.
Can CC382H-GM be formed, bent or molded?
Casting grade only — pour hot with deoxidation (Mn/Si, avoid P), use generous risers and chills because of the long freezing range and high shrinkage (~2%).
What is the maximum service temperature of CC382H-GM?
CC382H-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 CC382H-GS and CC382H-HT?
GS is the default condition — standard sand-cast condition for pump casings, valve bodies and large marine castings. HT: optional Cr/Si precipitation ageing when maximum strength and cavitation/wear resistance are required, at the cost of ductility. Yield strength is 275 MPa in GS versus 390 MPa in HT.
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-Nickel Alloy Datasheets — Copper Development Association (copper.org) (2023)
- Copper-Nickel Alloys for Seawater Service — technical guidance — Nickel Institute / CDA (2020)
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.