Copper Alloy C36500
UNS C36500 · EN CW610N
C36500 (CW610N) is a leaded Muntz metal — a duplex 60/40 wrought brass with about 0.5% Pb added for chip breaking while retaining the hot workability of the base alloy.
Reference datasheet — C36500 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 M20 condition
C36500 tempers and conditions
C36500 is supplied in 5 conditions, soft to hard. M20 is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Fully annealed for maximum ductility when bending, spinning or expanding is required after supply. | 125 | 345 | 50 | 70 HB | 26 % IACS |
M20Default As hot rolled | Standard condition for condenser/heat-exchanger tube plate to ASTM B171; best balance of strength and ductility. | 140 | 372 | 45 | 80 HB | 26 % IACS |
As hot extruded | Extruded rod, bar and shapes straight from the press; pick for machined marine hardware and flanges. | 140 | 360 | 45 | 78 HB | 26 % IACS |
Quarter hard | Light cold work for higher yield strength in sheet and drawn bar while keeping usable bending ductility. | 275 | 415 | 25 | 115 HB | 25 % IACS |
Half hard | Highest commonly stocked strength level; choose for stiff machined parts where little forming is needed. | 345 | 470 | 15 | 140 HB | 25 % IACS |
What is C36500?
C36500 (CW610N) is a leaded Muntz metal — a duplex 60/40 wrought brass with about 0.5% Pb added for chip breaking while retaining the hot workability of the base alloy. It is used where large hot-formed or drilled sections are needed, at 372 MPa tensile, 140 MPa yield, 45% elongation, 80 HB and 26% IACS, typically as plate, tube sheet and hot-forged shapes. Service is limited to 200 °C, cold formability is only fair, and the lead prevents reliable fusion welding; unleaded Muntz metal is the alternative where welding is required. C36500 has a density of 8.41 g/cm³ (0.304 lb/in³), lighter than 72% of copper alloy grades. It melts at 885°C (1,625 °F). C36500 has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 372 MPa (54 ksi) — weaker than 74% of copper alloy grades. Elongation at break is 45% and the elastic modulus is 105 GPa (15.2 Msi).
What is C36500 used for?
- condenser tube sheets
- marine hardware
- hot-forged fittings
Advantages
- Ductile — tolerates forming and impact — 45%, better than 91% of copper alloy grades
- Easy to machine — 65/100, better than 76% of copper alloy grades
Limitations
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
C36500 properties
Typical room-temperature values for C36500-M20; bars are the position among copper alloy grades.
Physical3
C36500 has a density of 8.41 g/cm³ (0.304 lb/in³), lighter than 72% of copper alloy grades. It melts at 885°C (1,625 °F).
Mechanical11
C36500 has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 372 MPa (54 ksi) — weaker than 74% of copper alloy grades. Elongation at break is 45% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
C36500 is rated for continuous service to 200°C (392 °F). It conducts heat at 123 W/m·K (71.1 BTU/hr·ft·°F), better than 70% of copper alloy grades. Thermal expansion is 20.8 µm/m·K (11.6 µin/in·°F).
Electrical3
C36500 conducts electricity at 26 % IACS, better than 63% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 86% of copper alloy grades.
Sustainability4
Producing a kilogram of C36500 takes about 58 MJ of energy and emits 3.6 kg of CO₂ — more than 61% of copper alloy grades. Typical recycled content is 50%.
Manufacturability7
C36500's machinability is good (65/100, better than 76% of copper alloy grades); weldability poor (25/100); formability fair (40/100).
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. C36500 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C36500
Is C36500 easy to machine?
Free-machining for a duplex brass — use zero-to-slightly-negative rake carbide or HSS, high speed, light feed, water-soluble coolant; chips break well thanks to the 0.5% Pb.
Can C36500 be welded?
Fusion welding is not recommended (lead causes hot cracking, zinc fumes); join by silver brazing or soft soldering, or seal-weld with matched filler only when unavoidable and with fume extraction.
Can C36500 be formed, bent or molded?
Excellent hot working at 650–780 °C (forging, extrusion, hot rolling); cold formability is only fair — anneal to O61 before severe bending or tube-hole expansion.
C36500 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 |
|---|---|---|
| Cu | 58 – 61 | 60 |
| Pbfree-machining phase | 0.25 – 0.7 | 0.5 |
| Fe | ≤ 0.15 | |
| Snmax (where specified) | ≤ 0.25 | |
| Znremainder, nominally ~39% | balance |
What surface finishes work on C36500?
Takes a bright mechanical or chemical polish and accepts Ni/Cr or tin plating; not anodizable — protect decorative surfaces with clear lacquer, and avoid ammonia-bearing cleaners to prevent SCC.
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 C36500 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CW610N
How much does C36500 cost?
C36500 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.
C36500 — frequently asked
What is C36500 used for?
C36500 is typically used for condenser tube sheets, marine hardware and hot-forged fittings. In short: machinable Muntz metal; hot-forging duplex brass; tube-sheet drilling grade.
What is the yield strength of C36500?
C36500 has a typical yield strength of 140 MPa (20.3 ksi) and a tensile strength of 372 MPa (54 ksi) — weaker than 74% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C36500 easy to machine?
Reasonably — machinability is rated good (65/100, better than 76% of copper alloy grades). Free-machining for a duplex brass — use zero-to-slightly-negative rake carbide or HSS, high speed, light feed, water-soluble coolant; chips break well thanks to the 0.5% Pb.
Can C36500 be welded?
Not readily — weldability is rated poor (25/100). Fusion welding is not recommended (lead causes hot cracking, zinc fumes); join by silver brazing or soft soldering, or seal-weld with matched filler only when unavoidable and with fume extraction.
What surface finishes work on C36500?
Takes a bright mechanical or chemical polish and accepts Ni/Cr or tin plating; not anodizable — protect decorative surfaces with clear lacquer, and avoid ammonia-bearing cleaners to prevent SCC.
Can C36500 be formed, bent or molded?
Excellent hot working at 650–780 °C (forging, extrusion, hot rolling); cold formability is only fair — anneal to O61 before severe bending or tube-hole expansion.
What is the maximum service temperature of C36500?
C36500 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C36500-M20 and C36500-H02?
M20 is the default condition — standard condition for condenser/heat-exchanger tube plate to ASTM B171; best balance of strength and ductility. H02: highest commonly stocked strength level; choose for stiff machined parts where little forming is needed. Yield strength is 140 MPa in M20 versus 345 MPa in H02.
How much does C36500 cost?
C36500 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 B171/B171M — Copper-Alloy Plate and Sheet for Pressure Vessels, Condensers and Heat Exchangers — ASTM (2018)
- CDA/copper.org Alloy Datasheet C36500 (leaded Muntz metal, uninhibited) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- EN 12167 / EN 12163 — Copper and copper alloys, profiles and rods (CW610N) — 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.