Copper Alloy C35000
UNS C35000
C35000 is a medium-leaded 62Cu wrought brass in the C20000–C49999 family that balances free-cutting behaviour with usable cold formability.
Reference datasheet — C35000 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
C35000 tempers and conditions
C35000 is supplied in 8 conditions, soft to hard. H02 is the default FabDigit quotes; the values on this page are for it.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Pick for maximum ductility: deep bending, forming, riveting and staking before final machining. | 117 | 317 | 50 | 62 HB | 27 % IACS |
As hot rolled | Rod, shapes and forging stock supplied as hot-worked; choose for forged hardware to be finish-machined. | 140 | 340 | 40 | 80 HB | 27 % IACS |
Quarter hard | Light temper when moderate strength must be combined with 90° bending across the grain. | 275 | 372 | 30 | 95 HB | 26 % IACS |
H02Default Half hard | The stock general-purpose temper: best balance of strength, chip control and residual forming ability. | 345 | 420 | 18 | 115 HB | 26 % IACS |
Full hard | Use where flat blanked parts need stiffness and clean shearing rather than bending. | 395 | 483 | 7 | 140 HB | 26 % IACS |
Extra hard | Higher-strength strip for flat contacts and stampings with only gentle radii. | 427 | 524 | 5 | 150 HB | 26 % IACS |
Spring hard | Spring strip for clips and flat springs where elastic limit matters more than bendability. | 448 | 552 | 4 | 160 HB | 26 % IACS |
Extra spring hard | Maximum cold-worked strength; only flat parts or very large-radius forming. | 462 | 572 | 3 | 168 HB | 26 % IACS |
What is C35000?
C35000 is a medium-leaded 62Cu wrought brass in the C20000–C49999 family that balances free-cutting behaviour with usable cold formability. It is stocked in tempers from O60 through H10 plus M20 for forged and machined hardware, giving 420 MPa tensile, 345 MPa yield, 18% elongation, 115 HB / 70 HRB, a machinability score of 75 and formability 55. Lead precludes fusion welding, conductivity is 26% IACS and service temperature is limited to 150 °C. Choose C34500 or C36000 where cutting rate matters more than forming. C35000 has a density of 8.47 g/cm³ (0.306 lb/in³), lighter than 68% of copper alloy grades. It melts at 888°C (1,630 °F). C35000 has a yield strength of 345 MPa (50 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 73% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 97 GPa (14.1 Msi).
What is C35000 used for?
- forged fittings
- machined hardware
- plumbing components
Advantages
- Easy to machine — 75/100, better than 80% of copper alloy grades
Limitations
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
- Needs corrosion protection — 48/100, worse than 96% of copper alloy grades
- Low stiffness — 97 GPa (14.1 Msi), worse than 88% of copper alloy grades
- Difficult to weld — 20/100, worse than 88% of copper alloy grades
C35000 properties
Typical room-temperature values for C35000-H02; bars are the position among copper alloy grades.
Physical3
C35000 has a density of 8.47 g/cm³ (0.306 lb/in³), lighter than 68% of copper alloy grades. It melts at 888°C (1,630 °F).
Mechanical12
C35000 has a yield strength of 345 MPa (50 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 73% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 97 GPa (14.1 Msi).
Thermal6
C35000 is rated for continuous service to 150°C (302 °F). It conducts heat at 115 W/m·K (66.4 BTU/hr·ft·°F), better than 61% of copper alloy grades. Thermal expansion is 20.3 µm/m·K (11.3 µin/in·°F).
Electrical3
C35000 conducts electricity at 26 % IACS, better than 63% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is fair (48/100), worse than 96% of copper alloy grades.
Sustainability4
Producing a kilogram of C35000 takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 60%.
Manufacturability8
C35000's machinability is very good (75/100, better than 80% of copper alloy grades); weldability poor (20/100); formability good (55/100).
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. C35000 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C35000
Is C35000 easy to machine?
Rated ~70% of C36000 — free-breaking chips with sharp positive-rake carbide or HSS, high speeds and light feeds; flood coolant keeps lead smearing off finished bores.
Can C35000 be welded?
Fusion welding is not recommended (lead causes hot cracking and zinc fume); join by soft soldering, silver brazing or mechanical fastening with good ventilation.
Can C35000 be formed, bent or molded?
Anneal (450–600 °C) or use O60/H01 for deep bends and rivet upsets; hot forge at 650–760 °C — cold formability drops sharply above H04.
C35000 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 |
|---|---|---|
| Cuincludes Ag | 60 – 63 | 62 |
| Pb | 0.8 – 2 | 1.1 |
| Fe | ≤ 0.15 | |
| Zn | balance |
What surface finishes work on C35000?
Buffs and mirror-polishes well, takes bright nickel/chrome, tin or gold plating; deburr and de-lead (acid pickle) before plating, or clear-lacquer to retard tarnish.
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).
How much does C35000 cost?
C35000 is a premium-cost copper alloy ($$$), cheaper than about 51% 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.
C35000 — frequently asked
What is C35000 used for?
C35000 is typically used for forged fittings, machined hardware and plumbing components. In short: forms better than C36000; medium-leaded forging brass; not fusion weldable.
What is the yield strength of C35000?
C35000 has a typical yield strength of 345 MPa (50 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 73% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C35000 easy to machine?
Yes — machinability is rated very good (75/100, better than 80% of copper alloy grades). Rated ~70% of C36000 — free-breaking chips with sharp positive-rake carbide or HSS, high speeds and light feeds; flood coolant keeps lead smearing off finished bores.
Can C35000 be welded?
Not readily — weldability is rated poor (20/100). Fusion welding is not recommended (lead causes hot cracking and zinc fume); join by soft soldering, silver brazing or mechanical fastening with good ventilation.
What surface finishes work on C35000?
Buffs and mirror-polishes well, takes bright nickel/chrome, tin or gold plating; deburr and de-lead (acid pickle) before plating, or clear-lacquer to retard tarnish.
Can C35000 be formed, bent or molded?
Anneal (450–600 °C) or use O60/H01 for deep bends and rivet upsets; hot forge at 650–760 °C — cold formability drops sharply above H04.
What is the maximum service temperature of C35000?
C35000 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C35000-H02 and C35000-O60?
H02 is the default condition — the stock general-purpose temper: best balance of strength, chip control and residual forming ability. O60: pick for maximum ductility: deep bending, forming, riveting and staking before final machining. Yield strength is 345 MPa in H02 versus 117 MPa in O60.
How much does C35000 cost?
C35000 is a premium-cost copper alloy ($$$), cheaper than about 51% 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 B36/B36M — Brass Plate, Sheet, Strip and Rolled Bar — ASTM International (2018)
- ASTM B121/B121M — Leaded Brass Plate, Sheet, Strip and Rolled Bar — ASTM International (2020)
- CDA Alloy C35000 (Medium-Leaded Brass 62%) property sheet — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials (copper alloys) — ASM International (2005)
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.