Copper Alloy C62580-M11
Temper
UNS C62580 · ASTM B150
M11 = as forged and quenched
Closed-die or open-die forgings supplied without further heat treatment — used for high-strength fittings and fastener blanks.
Values for the M11 condition
Other C62580 tempers and conditions
C62580 is listed in 4 conditions; see the grade overview at C62580.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Softest supply condition for easier machining or before a subsequent hardening cycle; strength and wear resistance are reduced. | 350 | 700 | 8 | 217 HB | — |
M11This page As forged and quenched | Closed-die or open-die forgings supplied without further heat treatment — used for high-strength fittings and fastener blanks. | 414 | 758 | 6 | 22 HRC | 7.5 % IACS |
M30Default As hot extruded | Standard stocked bar/rod condition: full hot-worked strength with the best elongation this alloy offers. | 427 | 772 | 5 | 22 HRC | 7.5 % IACS |
Quench hardened and temper annealed | Pick for maximum hardness and galling/wear resistance (dies, wear plates, guide blocks); ductility drops to ~2%. | 545 | 827 | 2 | 29 HRC | — |
What is C62580-M11?
C62580-M11 is C62580 in the M11 temper — closed-die or open-die forgings supplied without further heat treatment — used for high-strength fittings and fastener blanks. C62580-M11 has a yield strength of 414 MPa (60 ksi) and a tensile strength of 758 MPa (110 ksi) — stronger than 81% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 110 GPa (16 Msi). C62580-M11 has a density of 7.25 g/cm³ (0.262 lb/in³), lighter than 100% of copper alloy grades. It melts at 1,027°C (1,881 °F). M30 is the default condition FabDigit quotes; M11 is available on request or by drawing note.
Advantages
- Lightweight — 7.25 g/cm³ (0.262 lb/in³), better than 100% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
- High strength — 414 MPa (60 ksi), better than 81% of copper alloy grades
Limitations
- Limited ductility — 6%, worse than 89% of copper alloy grades
- Limited formability — 12/100, worse than 85% of copper alloy grades
- Low electrical conductivity — 7.5 % IACS, worse than 84% of copper alloy grades
- Poor heat conductor — 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 80% of copper alloy grades
C62580-M11 properties
Typical room-temperature values for C62580-M11; 23 are specific to this condition. Other listed values are C62580 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C62580-M11 has a density of 7.25 g/cm³ (0.262 lb/in³), lighter than 100% of copper alloy grades. It melts at 1,027°C (1,881 °F).
Mechanical14
C62580-M11 has a yield strength of 414 MPa (60 ksi) and a tensile strength of 758 MPa (110 ksi) — stronger than 81% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
C62580-M11 is rated for continuous service to 300°C (572 °F). It conducts heat at 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 80% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C62580-M11 conducts electricity at 7.5 % IACS, worse than 84% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), better than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C62580-M11 takes about 58 MJ of energy and emits 3.8 kg of CO₂ — more than 61% of copper alloy grades. Typical recycled content is 35%.
Manufacturability8
C62580-M11's machinability is poor (27/100, worse than 81% of copper alloy grades); weldability poor (32/100); formability not recommended (12/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C62580-M11
Is C62580 easy to machine?
Machine like a hard bronze: rigid setup, sharp carbide (K-grade) tools, 5–8° positive rake, 60–120 m/min, generous flood coolant; chips are short and abrasive — rating only about 20 % of free-cutting brass.
Can C62580 be welded?
GTAW/GMAW with matching Al-bronze filler (ERCuAl-A2/A3), preheat 150–250 °C, tight interpass control and slow cooling; high Al content makes it crack- and oxide-film sensitive, so post-weld temper anneal is recommended.
Can C62580 be formed, bent or molded?
Hot forge/extrude at roughly 750–870 °C; virtually no cold formability — bending or heading at room temperature will crack the eutectoid structure.
What surface finishes work on C62580?
Not anodizable; use vapour degrease plus mechanical polish, chemical blackening, passivation or electroless nickel; the alumina film gives good natural tarnish resistance.
C62580 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 |
|---|---|---|
| Alhigh-aluminium (β-hardenable) range per ASTM B150; verify against mill certificate | 12 – 13 | 12.5 |
| Fegrain refiner / κ-phase former | 3 – 5 | 4 |
| Nimax, improves dealuminification resistance | ≤ 2 | 0.5 |
| Mn | ≤ 2 | 0.3 |
| Si | ≤ 0.1 | — |
| Zn | ≤ 0.1 | — |
| Sn | ≤ 0.2 | — |
| Curemainder, approx. 81–84 % | balance | — |
C62580-M11 — frequently asked
What is C62580-M11 used for?
C62580-M11 is typically used for aircraft fasteners, high-strength bolts and forged fittings. In short: high-strength forging bronze; aerospace fastener grade; low ductility, hot work only.
What is the yield strength of C62580-M11?
C62580-M11 has a typical yield strength of 414 MPa (60 ksi) and a tensile strength of 758 MPa (110 ksi) — stronger than 81% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C62580-M11 easy to machine?
Not especially — machinability is rated poor (27/100, worse than 81% of copper alloy grades). Machine like a hard bronze: rigid setup, sharp carbide (K-grade) tools, 5–8° positive rake, 60–120 m/min, generous flood coolant; chips are short and abrasive — rating only about 20 % of free-cutting brass.
Can C62580-M11 be welded?
Not readily — weldability is rated poor (32/100). GTAW/GMAW with matching Al-bronze filler (ERCuAl-A2/A3), preheat 150–250 °C, tight interpass control and slow cooling; high Al content makes it crack- and oxide-film sensitive, so post-weld temper anneal is recommended.
What surface finishes work on C62580-M11?
Not anodizable; use vapour degrease plus mechanical polish, chemical blackening, passivation or electroless nickel; the alumina film gives good natural tarnish resistance.
Can C62580-M11 be formed, bent or molded?
Hot forge/extrude at roughly 750–870 °C; virtually no cold formability — bending or heading at room temperature will crack the eutectoid structure.
What is the maximum service temperature of C62580-M11?
C62580-M11 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C62580-M30 and C62580-TQ50?
M30 is the default condition — standard stocked bar/rod condition: full hot-worked strength with the best elongation this alloy offers. TQ50: pick for maximum hardness and galling/wear resistance (dies, wear plates, guide blocks); ductility drops to ~2%. Yield strength is 427 MPa in M30 versus 545 MPa in TQ50.
Sources
- ASTM B150/B150M — Aluminum Bronze Rod, Bar and Shapes — ASTM International (2019)
- CDA / copper.org alloy datasheets, wrought aluminium bronzes C62xxx — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- High-aluminium wrought bronze wear-alloy datasheets (AMPCO-class bar/forgings) — AMPCO Metal (2022)
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.