Copper Alloy C62200-M20
Finish state
UNS C62200 · ASTM B150
M20 = as hot rolled
Use for hot-rolled flats and wear plate where extruded sections are not available.
Values for the M20 condition
Other C62200 tempers and conditions
C62200 is listed in 6 conditions; see the grade overview at C62200.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Choose when maximum ductility for bending, straightening or subsequent forming is required. | 275 | 585 | 25 | 150 HB | 7.5 % IACS |
M20This page As hot rolled | Use for hot-rolled flats and wear plate where extruded sections are not available. | 305 | 620 | 20 | 160 HB | 7 % IACS |
As forged and quenched | Pick for near-net forged parts; properties similar to extruded but slightly lower and more direction-dependent. | 310 | 620 | 18 | 165 HB | 7 % IACS |
M30Default As hot extruded | Standard stocked condition for C62200 rod, bar and shapes; best balance of strength, ductility and price. | 330 | 655 | 20 | 170 HB | 7 % IACS |
Full hard | Pick for close-tolerance cold-drawn bar and the highest as-supplied strength/hardness without heat treatment. | 450 | 700 | 12 | 195 HB | 7 % IACS |
Quench hardened and temper annealed | Specify for maximum hardness and wear/galling resistance in bushings, gibs and wear strips; ductility and impact drop markedly. | 450 | 760 | 8 | 22 HRC | 7 % IACS |
What is C62200-M20?
C62200-M20 is C62200 supplied in the M20 condition — use for hot-rolled flats and wear plate where extruded sections are not available. C62200-M20 has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 62% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 117 GPa (17 Msi). C62200-M20 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 1,027°C (1,881 °F). M30 is the default condition FabDigit quotes; M20 is available on request or by drawing note.
Advantages
- Lightweight — 7.53 g/cm³ (0.272 lb/in³), better than 96% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
- Good corrosion resistance — 72/100, better than 84% of copper alloy grades
- Readily welded — 65/100, better than 80% of copper alloy grades
Limitations
- Low electrical conductivity — 7 % IACS, worse than 86% of copper alloy grades
- Poor heat conductor — 45 W/m·K (26 BTU/hr·ft·°F), worse than 76% of copper alloy grades
C62200-M20 properties
Typical room-temperature values for C62200-M20; 20 are specific to this condition. Other listed values are C62200 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C62200-M20 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 1,027°C (1,881 °F).
Mechanical14
C62200-M20 has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 62% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C62200-M20 is rated for continuous service to 300°C (572 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), worse than 76% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C62200-M20 conducts electricity at 7 % IACS, worse than 86% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 84% of copper alloy grades.
Sustainability4
Producing a kilogram of C62200-M20 takes about 57 MJ of energy and emits 3.9 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 35%.
Manufacturability7
C62200-M20's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability good (65/100); formability fair (38/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C62200-M20
Is C62200 easy to machine?
Machines like a tough, gummy-to-abrasive bronze: rigid setup, positive-rake sharp carbide, moderate speed with heavy feed and flood coolant; expect ~20–30 % of free-cutting brass throughput and short tool life on the hard γ2-containing tempers.
Can C62200 be welded?
GTAW/GMAW with matching aluminium-bronze filler (ERCuAl-A2) works well if the alumina film is wire-brushed off and interpass temperature is kept low; avoid slow cooling through 550–350 °C and do not oxyacetylene weld or solder.
Can C62200 be formed, bent or molded?
Hot work at 700–850 °C (forge, extrude, bend); cold formability is poor, so limit cold bends to generous radii or anneal first, and use a 600–650 °C temper anneal to relieve stresses.
What surface finishes work on C62200?
Not anodizable — takes a fine mechanical polish and buffs to a golden lustre that self-passivates; electroplating (Ni strike first) or PTFE/dry-film lubricant coatings are used for wear parts, and no painting is normally needed for marine service.
C62200 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 |
|---|---|---|
| Al | 11 – 12 | 11.5 |
| Fe | 3 – 4.25 | 3.6 |
| Si | ≤ 0.25 | — |
| Mnmax, when specified | ≤ 0.5 | — |
| Zn | ≤ 0.5 | — |
| Cu86.0 % min (remainder, incl. Ni counted with Cu) | balance | — |
C62200-M20 — frequently asked
What is C62200-M20 used for?
C62200-M20 is typically used for gears, bushings, marine hardware and pump shafts. In short: stronger than C61400; wear-resistant marine bronze; hot-forged bar and rod.
What is the yield strength of C62200-M20?
C62200-M20 has a typical yield strength of 305 MPa (44.2 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 62% of copper alloy grades. Strength varies by condition: see the 6 listed tempers.
Is C62200-M20 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Machines like a tough, gummy-to-abrasive bronze: rigid setup, positive-rake sharp carbide, moderate speed with heavy feed and flood coolant; expect ~20–30 % of free-cutting brass throughput and short tool life on the hard γ2-containing tempers.
Can C62200-M20 be welded?
Yes — weldability is rated good (65/100). GTAW/GMAW with matching aluminium-bronze filler (ERCuAl-A2) works well if the alumina film is wire-brushed off and interpass temperature is kept low; avoid slow cooling through 550–350 °C and do not oxyacetylene weld or solder.
What surface finishes work on C62200-M20?
Not anodizable — takes a fine mechanical polish and buffs to a golden lustre that self-passivates; electroplating (Ni strike first) or PTFE/dry-film lubricant coatings are used for wear parts, and no painting is normally needed for marine service.
Can C62200-M20 be formed, bent or molded?
Hot work at 700–850 °C (forge, extrude, bend); cold formability is poor, so limit cold bends to generous radii or anneal first, and use a 600–650 °C temper anneal to relieve stresses.
What is the maximum service temperature of C62200-M20?
C62200-M20 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 C62200-M30 and C62200-H04?
M30 is the default condition — standard stocked condition for C62200 rod, bar and shapes; best balance of strength, ductility and price. H04: pick for close-tolerance cold-drawn bar and the highest as-supplied strength/hardness without heat treatment. Yield strength is 330 MPa in M30 versus 450 MPa in H04.
Sources
- ASTM B150/B150M — Aluminum Bronze Rod, Bar, and Shapes — ASTM International (2019)
- CDA/UNS C62200 alloy datasheet (copper.org) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (copper alloys in seawater) — ASM International (2005)
- Aluminium bronze bar and forging datasheets — Farmers Copper / Aviva Metals (2023)
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.