Copper Alloy CC380H GS-SR
Heat-treated state
EN CC380H · UNS C96200
GS-SR = sand cast, stress relieved
Use when heavy welded/repaired castings must be dimensionally stable or free of residual stress before final machining.
Values for the GS-SR condition
Other CC380H tempers and conditions
CC380H is listed in 5 conditions; see the grade overview at CC380H.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
GS-SRThis page Sand cast, stress relieved | Use when heavy welded/repaired castings must be dimensionally stable or free of residual stress before final machining. | 130 | 290 | 28 | 75 HB | 10.5 % IACS |
GSDefault Sand cast | Standard route for valve bodies, pump casings and flanges of any size; most commonly stocked/ordered condition. | 140 | 300 | 25 | 80 HB | 10 % IACS |
Permanent (gravity die) cast | Choose for repeat small/medium fittings where faster solidification gives finer grain, tighter tolerances and slightly higher strength. | 150 | 310 | 25 | 85 HB | 10 % IACS |
Continuously cast | Bar and hollow stock for machined seawater fittings; uniform fine structure with good machining behaviour. | 155 | 320 | 25 | 88 HB | 10 % IACS |
Centrifugally cast | Best for seawater pipe spools, sleeves and bushings — dense, porosity-free wall with the highest cast strength. | 160 | 330 | 25 | 90 HB | 10 % IACS |
What is CC380H GS-SR?
CC380H GS-SR is CC380H heat treated to GS-SR — use when heavy welded/repaired castings must be dimensionally stable or free of residual stress before final machining. CC380H GS-SR has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 290 MPa (42.1 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 28% and the elastic modulus is 124 GPa (18 Msi). CC380H GS-SR has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 77% of copper alloy grades. It melts at 1,100°C (2,012 °F). GS is the default condition FabDigit quotes; GS-SR is available on request or by drawing note.
Advantages
- Good corrosion resistance — 85/100, better than 100% of copper alloy grades
- Readily welded — 80/100, better than 93% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
Limitations
- High embodied carbon — 5.2 kg CO₂/kg, worse than 88% of copper alloy grades
- Poor heat conductor — 43 W/m·K (24.8 BTU/hr·ft·°F), worse than 78% of copper alloy grades
- Low strength — 130 MPa (18.9 ksi), worse than 77% of copper alloy grades
- Limited formability — 18/100, worse than 75% of copper alloy grades
CC380H GS-SR properties
Typical room-temperature values for CC380H GS-SR; 20 are specific to this condition. Other listed values are CC380H reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
CC380H GS-SR has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 77% of copper alloy grades. It melts at 1,100°C (2,012 °F).
Mechanical14
CC380H GS-SR has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 290 MPa (42.1 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 28% and the elastic modulus is 124 GPa (18 Msi).
Thermal6
CC380H GS-SR is rated for continuous service to 300°C (572 °F). It conducts heat at 43 W/m·K (24.8 BTU/hr·ft·°F), worse than 78% of copper alloy grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
CC380H GS-SR conducts electricity at 10.5 % IACS, worse than 72% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (85/100), better than 100% of copper alloy grades.
Sustainability4
Producing a kilogram of CC380H GS-SR takes about 70 MJ of energy and emits 5.2 kg of CO₂ — more than 84% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
CC380H GS-SR's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability very good (80/100); formability poor (18/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CC380H GS-SR
Is CC380H easy to machine?
Gummy and work-hardening — use sharp positive-rake carbide, low speed with heavy feed, ample coolant and rigid setups; rating ≈20 % of free-cutting brass.
Can CC380H be welded?
Readily GTAW/GMAW welded with CuNi 70/30 (ERCuNi) filler; keep interpass low, no preheat needed, avoid lead/sulphur contamination and back-purge for root passes.
Can CC380H be formed, bent or molded?
Cast only — needs good gating/risering, Mn-Si deoxidation and controlled pour temperature (~1250 °C) to avoid gas porosity and shrinkage.
What surface finishes work on CC380H?
Not anodizable; usually supplied bare so the protective seawater film can form, or lightly pickled/shot blasted; electroplating and silver brazing are both feasible.
CC380H 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 | 9 – 11 | 10 |
| Fein solution — key to erosion-corrosion resistance | 1 – 1.8 | 1.4 |
| Mn | 0.5 – 1.5 | 1 |
| Sideoxidiser residual | ≤ 0.3 | — |
| Nboptional, improves weldability/soundness (C96200 practice) | ≤ 1 | — |
| C | ≤ 0.1 | — |
| Zn | ≤ 1 | — |
| Pbrestricted — causes hot cracking | ≤ 0.01 | — |
| S | ≤ 0.02 | — |
| P | ≤ 0.02 | — |
| Cu | balance | — |
CC380H GS-SR — frequently asked
What is CC380H GS-SR used for?
CC380H GS-SR is typically used for seawater valve bodies, marine pump casings, flanges and offshore piping fittings. In short: standard seawater casting alloy; strong biofouling resistance; lower-cost cast Cu-Ni.
What is the yield strength of CC380H GS-SR?
CC380H GS-SR has a typical yield strength of 130 MPa (18.9 ksi) and a tensile strength of 290 MPa (42.1 ksi) — weaker than 77% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is CC380H GS-SR easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Gummy and work-hardening — use sharp positive-rake carbide, low speed with heavy feed, ample coolant and rigid setups; rating ≈20 % of free-cutting brass.
Can CC380H GS-SR be welded?
Yes — weldability is rated very good (80/100). Readily GTAW/GMAW welded with CuNi 70/30 (ERCuNi) filler; keep interpass low, no preheat needed, avoid lead/sulphur contamination and back-purge for root passes.
What surface finishes work on CC380H GS-SR?
Not anodizable; usually supplied bare so the protective seawater film can form, or lightly pickled/shot blasted; electroplating and silver brazing are both feasible.
Can CC380H GS-SR be formed, bent or molded?
Cast only — needs good gating/risering, Mn-Si deoxidation and controlled pour temperature (~1250 °C) to avoid gas porosity and shrinkage.
What is the maximum service temperature of CC380H GS-SR?
CC380H GS-SR 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 CC380H-GS and CC380H-GZ?
GS is the default condition — standard route for valve bodies, pump casings and flanges of any size; most commonly stocked/ordered condition. GZ: best for seawater pipe spools, sleeves and bushings — dense, porosity-free wall with the highest cast strength. Yield strength is 140 MPa in GS versus 160 MPa in GZ.
Sources
- EN 1982 — Copper and copper alloys: ingots and castings — CEN (2017)
- ASTM B369 — Copper-Nickel Alloy Castings — ASTM International (2021)
- C96200 alloy datasheet — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Copper-Nickel Alloys: Properties and Applications — Nickel Institute / CDA (2016)
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.