Copper Alloy C36500-M30
Temper
UNS C36500 · EN CW610N
M30 = as hot extruded
Extruded rod, bar and shapes straight from the press; pick for machined marine hardware and flanges.
Values for the M30 condition
Other C36500 tempers and conditions
C36500 is listed in 5 conditions; see the grade overview at C36500.
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 |
M30This page 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-M30?
C36500-M30 is C36500 in the M30 temper — extruded rod, bar and shapes straight from the press; pick for machined marine hardware and flanges. C36500-M30 has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 360 MPa (52.2 ksi) — weaker than 74% of copper alloy grades. Elongation at break is 45% and the elastic modulus is 105 GPa (15.2 Msi). C36500-M30 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). M20 is the default condition FabDigit quotes; M30 is available on request or by drawing note.
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-M30 properties
Typical room-temperature values for C36500-M30; 20 are specific to this condition. Other listed values are C36500 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C36500-M30 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-M30 has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 360 MPa (52.2 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-M30 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-M30 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-M30 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-M30's machinability is good (65/100, better than 76% of copper alloy grades); weldability poor (25/100); formability fair (40/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C36500-M30
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.
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.
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 | — |
C36500-M30 — frequently asked
What is C36500-M30 used for?
C36500-M30 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-M30?
C36500-M30 has a typical yield strength of 140 MPa (20.3 ksi) and a tensile strength of 360 MPa (52.2 ksi) — weaker than 74% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C36500-M30 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-M30 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-M30?
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-M30 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-M30?
C36500-M30 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.