Copper Alloy C76200
UNS C76200 · EN CW405J
C76200 is a higher-zinc, lower-nickel wrought copper-nickel-zinc nickel silver (UNS C76200 / CW405J), cold-work hardened through M20, OS035 and H01-H08 tempers.
Reference datasheet — C76200 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the H02 condition
C76200 tempers and conditions
C76200 is supplied in 7 conditions, soft to hard. H02 is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As hot rolled | Hot-rolled plate/bar stock for further machining or forming where no defined cold work is required. | 140 | 370 | 45 | 85 HB | 6 % IACS |
Annealed to 0.035 mm grain size | Choose for deep drawing, severe bending or spinning where maximum ductility is needed. | 152 | 386 | 40 | 95 HB | 6 % IACS |
Quarter hard | Light cold work for parts that still need moderate bending but more stiffness than annealed. | 310 | 450 | 25 | 130 HB | 5.7 % IACS |
H02Default Half hard | The general-purpose stocked strip temper: good balance of strength and 90° bendability for trim and stampings. | 448 | 517 | 10 | 155 HB | 5.5 % IACS |
Full hard | For flat blanked parts, clips and stiff trim where only gentle forming along the grain is done. | 517 | 586 | 3 | 175 HB | 5.5 % IACS |
Extra hard | High-strength strip for flat springs and contacts formed only with generous bend radii. | 586 | 655 | 2 | 190 HB | 5.5 % IACS |
Spring hard | Maximum strength/elastic limit temper for flat springs, contact fingers and snap parts. | 620 | 700 | 2 | 200 HB | 5.5 % IACS |
What is C76200?
C76200 is a higher-zinc, lower-nickel wrought copper-nickel-zinc nickel silver (UNS C76200 / CW405J), cold-work hardened through M20, OS035 and H01-H08 tempers. It is chosen for excellent cold formability (score 60) and bright colour at lower cost than the high-nickel grades, with 448 MPa yield, 517 MPa tensile, 10% elongation, 155 HB (82 HRB) and 5.5% IACS in the default condition, mostly as strip for trim and stampings. Machinability is about 30 (near 20% of free-cutting brass), fusion welding is limited by zinc fume, and service temperature is capped near 175 °C. Use leaded C79200 for heavy turning. C76200 has a density of 8.7 g/cm³ (0.314 lb/in³), lighter than 56% of copper alloy grades. It melts at 1,010°C (1,850 °F). C76200 has a yield strength of 448 MPa (65 ksi) and a tensile strength of 517 MPa (75 ksi) — stronger than 85% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 124 GPa (18 Msi).
What is C76200 used for?
- hardware trim
- costume jewelry
- optical components
- general stampings
Advantages
- Polishes to a fine finish — 90/100, better than 99% of copper alloy grades
- High strength — 448 MPa (65 ksi), better than 85% of copper alloy grades
Limitations
- Low electrical conductivity — 5.5 % IACS, worse than 95% of copper alloy grades
- Poor heat conductor — 29 W/m·K (16.8 BTU/hr·ft·°F), worse than 93% of copper alloy grades
- Limited service temperature — 175°C (347 °F), worse than 92% of copper alloy grades
- High embodied carbon — 5 kg CO₂/kg, worse than 86% of copper alloy grades
- Limited ductility — 10%, worse than 76% of copper alloy grades
C76200 properties
Typical room-temperature values for C76200-H02; bars are the position among copper alloy grades.
Physical3
C76200 has a density of 8.7 g/cm³ (0.314 lb/in³), lighter than 56% of copper alloy grades. It melts at 1,010°C (1,850 °F).
Mechanical12
C76200 has a yield strength of 448 MPa (65 ksi) and a tensile strength of 517 MPa (75 ksi) — stronger than 85% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 124 GPa (18 Msi).
Thermal6
C76200 is rated for continuous service to 175°C (347 °F). It conducts heat at 29 W/m·K (16.8 BTU/hr·ft·°F), worse than 93% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C76200 conducts electricity at 5.5 % IACS, worse than 95% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C76200 takes about 72 MJ of energy and emits 5 kg of CO₂ — more than 86% of copper alloy grades. Typical recycled content is 40%.
Manufacturability6
C76200's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability fair (50/100); formability good (60/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C76200 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C76200
Is C76200 easy to machine?
Gummy, low-lead alloy — rating ≈20 % of free-cutting brass; use sharp positive-rake tools, high speed, generous coolant, or specify leaded C79200 when heavy turning is required.
Can C76200 be welded?
Resistance and brazing/soldering are the preferred joining routes; fusion welding risks zinc fume and porosity, so use silver brazing filler or spot welding.
Can C76200 be formed, bent or molded?
Excellent cold formability in OS035/H01 tempers (deep draw, roll form); anneal 600–750 °C between heavy passes and stress-relieve formed hard tempers to avoid ammonia SCC.
C76200 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 |
|---|---|---|
| CuCu + named elements ≥ 99.5 % | 57 – 61 | 59 |
| NiNi + Co | 11 – 13.5 | 12 |
| Pb | ≤ 0.1 | |
| Fe | ≤ 0.25 | |
| Mn | ≤ 0.5 | |
| Zn | balance |
What surface finishes work on C76200?
Takes a high bright polish naturally silver-white; readily nickel-, chrome- or silver-plated, and can be chemically blackened or lacquered for decorative trim.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Equivalent designations
Standards and trade names that resolve to Copper Alloy C76200 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CW405J
How much does C76200 cost?
C76200 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C76200 — frequently asked
What is C76200 used for?
C76200 is typically used for hardware trim, costume jewelry, optical components and general stampings. In short: lowest-cost bright nickel silver; best formability in family; high-zinc, low-nickel grade.
What is the yield strength of C76200?
C76200 has a typical yield strength of 448 MPa (65 ksi) and a tensile strength of 517 MPa (75 ksi) — stronger than 85% of copper alloy grades. Strength varies by condition: see the 7 listed tempers.
Is C76200 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Gummy, low-lead alloy — rating ≈20 % of free-cutting brass; use sharp positive-rake tools, high speed, generous coolant, or specify leaded C79200 when heavy turning is required.
Can C76200 be welded?
With care — weldability is rated fair (50/100). Resistance and brazing/soldering are the preferred joining routes; fusion welding risks zinc fume and porosity, so use silver brazing filler or spot welding.
What surface finishes work on C76200?
Takes a high bright polish naturally silver-white; readily nickel-, chrome- or silver-plated, and can be chemically blackened or lacquered for decorative trim.
Can C76200 be formed, bent or molded?
Excellent cold formability in OS035/H01 tempers (deep draw, roll form); anneal 600–750 °C between heavy passes and stress-relieve formed hard tempers to avoid ammonia SCC.
What is the maximum service temperature of C76200?
C76200 is rated for continuous use to about 175°C (347 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C76200-H02 and C76200-M20?
H02 is the default condition — the general-purpose stocked strip temper: good balance of strength and 90° bendability for trim and stampings. M20: hot-rolled plate/bar stock for further machining or forming where no defined cold work is required. Yield strength is 448 MPa in H02 versus 140 MPa in M20.
How much does C76200 cost?
C76200 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM B122/B122M — Copper-Nickel-Zinc (Nickel Silver) Plate, Sheet, Strip and Rolled Bar — ASTM International (2022)
- ASTM B151/B151M — Copper-Nickel-Zinc and Copper-Nickel Rod and Bar — ASTM International (2021)
- CDA Alloy Database — C76200 property sheet — Copper Development Association (2023)
- ASM Handbook Vol. 2: Properties and Selection — Nonferrous Alloys — ASM International (1990)
- EN 12163 / CW405J copper-nickel-zinc designations — CEN (2016)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.