Copper Alloy C35600
UNS C35600
C35600 is a free-cutting leaded brass in the C20000–C49999 wrought brass family, closely related to C35300, with lead added purely to break chips.
Reference datasheet — C35600 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
C35600 tempers and conditions
C35600 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 |
|---|---|---|---|---|---|---|
Soft annealed | Pick for maximum ductility when parts are deep-formed, staked or heavily bent after blanking. | 115 | 340 | 50 | 42 HRB | 26 % IACS |
Quarter hard | Use when moderate bending is still required but annealed strip is too soft to feed and blank cleanly. | 270 | 395 | 25 | 62 HRB | — |
H02Default Half hard | The general-purpose stocked temper: balanced strength, adequate bendability and top-rated screw-machine behaviour. | 340 | 425 | 15 | 70 HRB | — |
Full hard | Choose for flat parts and washers needing high strength and stiffness with only gentle forming. | 415 | 490 | 7 | 80 HRB | — |
Extra hard | For stamped contacts and clips that must hold shape with minimal deflection; bending only with generous radii. | 450 | 540 | 5 | 84 HRB | — |
Spring hard | Spring-quality strip for leaf contacts and retaining members where elastic limit matters more than ductility. | 470 | 570 | 4 | 87 HRB | — |
Extra spring hard | Highest-strength strip temper; specify only for flat or very lightly formed spring parts, as bendability is nearly exhausted. | 490 | 595 | 3 | 89 HRB | — |
What is C35600?
C35600 is a free-cutting leaded brass in the C20000–C49999 wrought brass family, closely related to C35300, with lead added purely to break chips. It carries the benchmark machinability rating of 100 and delivers 425 MPa tensile, 340 MPa yield, 15% elongation and 70 HRB in the default temper, making it the standard choice for high-volume automatic screw-machine and multi-spindle work in rod and bar form. Service is limited to 180 °C, formability is moderate at 45, and the lead rules out fusion welding. C36200 is the nearest alternative when higher elongation is needed. C35600 has a density of 8.47 g/cm³ (0.306 lb/in³), lighter than 68% of copper alloy grades. It melts at 885°C (1,625 °F). C35600 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 425 MPa (61.6 ksi) — stronger than 71% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 97 GPa (14.1 Msi).
What is C35600 used for?
- precision machined parts
- fittings
- small fasteners
Advantages
- Easy to machine — 100/100, better than 100% of copper alloy grades
Limitations
- Needs corrosion protection — 45/100, worse than 98% 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
C35600 properties
Typical room-temperature values for C35600-H02; bars are the position among copper alloy grades.
Physical3
C35600 has a density of 8.47 g/cm³ (0.306 lb/in³), lighter than 68% of copper alloy grades. It melts at 885°C (1,625 °F).
Mechanical12
C35600 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 425 MPa (61.6 ksi) — stronger than 71% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 97 GPa (14.1 Msi).
Thermal6
C35600 is rated for continuous service to 180°C (356 °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 20.5 µm/m·K (11.4 µin/in·°F).
Electrical3
C35600 conducts electricity at 26 % IACS, better than 63% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is fair (45/100), worse than 98% of copper alloy grades.
Sustainability4
Producing a kilogram of C35600 takes about 58 MJ of energy and emits 3.6 kg of CO₂ — more than 61% of copper alloy grades. Typical recycled content is 70%.
Manufacturability8
C35600's machinability is excellent (100/100, better than 100% of copper alloy grades); weldability poor (20/100); formability fair (45/100).
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. C35600 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C35600
Is C35600 easy to machine?
Benchmark free-cutting behaviour — 100% rating, high speeds with neutral-to-negative rake tooling, short chips, minimal tool wear.
Can C35600 be welded?
Not recommended for fusion welding (lead causes hot cracking); join by soft soldering (excellent) or silver brazing with care.
Can C35600 be formed, bent or molded?
Cold bend in the O60/H01 tempers along or across grain with radii ≥1t; hard tempers crack easily and hot working is prohibited by the lead phase.
C35600 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 |
|---|---|---|
| Cumay include Ag | 60 – 63 | 61.5 |
| Pbfree-machining phase | 2 – 3 | 2.5 |
| Fe | ≤ 0.15 | |
| Zn | balance |
What surface finishes work on C35600?
Takes bright dip, benzotriazole/lacquer, nickel-chrome or tin plating well; polish to a satin-bright finish, mirror finish limited by lead inclusions.
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 C35600 cost?
C35600 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.
C35600 — frequently asked
What is C35600 used for?
C35600 is typically used for precision machined parts, fittings and small fasteners. In short: benchmark free-cutting brass; high-volume screw-machine grade; not fusion weldable.
What is the yield strength of C35600?
C35600 has a typical yield strength of 340 MPa (49.3 ksi) and a tensile strength of 425 MPa (61.6 ksi) — stronger than 71% of copper alloy grades. Strength varies by condition: see the 7 listed tempers.
Is C35600 easy to machine?
Yes — machinability is rated excellent (100/100, better than 100% of copper alloy grades). Benchmark free-cutting behaviour — 100% rating, high speeds with neutral-to-negative rake tooling, short chips, minimal tool wear.
Can C35600 be welded?
Not readily — weldability is rated poor (20/100). Not recommended for fusion welding (lead causes hot cracking); join by soft soldering (excellent) or silver brazing with care.
What surface finishes work on C35600?
Takes bright dip, benzotriazole/lacquer, nickel-chrome or tin plating well; polish to a satin-bright finish, mirror finish limited by lead inclusions.
Can C35600 be formed, bent or molded?
Cold bend in the O60/H01 tempers along or across grain with radii ≥1t; hard tempers crack easily and hot working is prohibited by the lead phase.
What is the maximum service temperature of C35600?
C35600 is rated for continuous use to about 180°C (356 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C35600-H02 and C35600-O60?
H02 is the default condition — the general-purpose stocked temper: balanced strength, adequate bendability and top-rated screw-machine behaviour. O60: pick for maximum ductility when parts are deep-formed, staked or heavily bent after blanking. Yield strength is 340 MPa in H02 versus 115 MPa in O60.
How much does C35600 cost?
C35600 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 Database — C35600 Extra-High-Leaded Brass — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- GB/T 2040 / GB/T 2059 — SAC (2017)
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.