Copper Alloy C86100-M07
Heat-treated state
UNS C86100
M07 = as continuous cast
Stock form for machined bushings, nuts and gear blanks — uniform dense structure, best machined yield of the cast forms.
Values for the M07 condition
Other C86100 tempers and conditions
C86100 is listed in 4 conditions; see the grade overview at C86100.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard commercial condition for gears, bearings and marine hardware poured in sand moulds. | 415 | 820 | 20 | 225 HB | 8 % IACS |
M07This page As continuous cast | Stock form for machined bushings, nuts and gear blanks — uniform dense structure, best machined yield of the cast forms. | 425 | 830 | 20 | 225 HB | 8 % IACS |
As centrifugally cast | Pick for large rings, bushings and gear blanks where the denser, finer-grained centrifugal structure raises strength and soundness. | 430 | 840 | 20 | 230 HB | 8 % IACS |
As plaster cast | Use for repeat-production small gears and wear parts needing tighter dimensions and a chilled, slightly stronger skin. | 430 | 840 | 18 | 230 HB | 8 % IACS |
What is C86100-M07?
C86100-M07 is C86100 heat treated to M07 — stock form for machined bushings, nuts and gear blanks — uniform dense structure, best machined yield of the cast forms. C86100-M07 has a yield strength of 425 MPa (61.6 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 83% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 103 GPa (14.9 Msi). C86100-M07 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 862°C (1,584 °F). M01 is the default condition FabDigit quotes; M07 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
- Low embodied carbon — 3.2 kg CO₂/kg, better than 92% of copper alloy grades
- High strength — 425 MPa (61.6 ksi), better than 83% of copper alloy grades
Limitations
- Hard to polish — 60/100, worse than 92% of copper alloy grades
- Poor heat conductor — 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 86% of copper alloy grades
- Low electrical conductivity — 8 % IACS, worse than 81% of copper alloy grades
- Limited formability — 15/100, worse than 79% of copper alloy grades
C86100-M07 properties
Typical room-temperature values for C86100-M07; 20 are specific to this condition. Other listed values are C86100 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C86100-M07 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 862°C (1,584 °F).
Mechanical14
C86100-M07 has a yield strength of 425 MPa (61.6 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 83% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C86100-M07 is rated for continuous service to 200°C (392 °F). It conducts heat at 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 86% of copper alloy grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
C86100-M07 conducts electricity at 8 % IACS, worse than 81% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 86% of copper alloy grades.
Sustainability4
Producing a kilogram of C86100-M07 takes about 45 MJ of energy and emits 3.2 kg of CO₂ — less than 97% of copper alloy grades. Typical recycled content is 75%.
Manufacturability8
C86100-M07's machinability is poor (32/100, worse than 57% of copper alloy grades); weldability poor (30/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C86100-M07
Is C86100 easy to machine?
Machines like a tough, gummy high-strength brass — use rigid setups, sharp carbide, positive rake, moderate speed and heavy coolant; rating only ~25–30 % of free-cutting brass.
Can C86100 be welded?
GMAW/GTAW with matching aluminium-bronze or Mn-bronze filler is possible but the Al-rich oxide and Zn fuming demand preheat control; oxyacetylene welding and soldering are not recommended.
Can C86100 be formed, bent or molded?
Cast-only alloy — good fluidity in sand, permanent mould, centrifugal and continuous casting; keep gating quiet to avoid Al/Zn oxide films and use chills for heavy sections.
What surface finishes work on C86100?
Takes a bright mechanical polish; chemical blackening or clear lacquer for decorative use; avoid anodizing and avoid tight-clearance chrome plating on porous cast surfaces.
C86100 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 | 66 – 68 | 67 |
| Alprimary strengthener | 4.5 – 5.5 | 5 |
| Mn | 2.5 – 5 | 3.5 |
| Fegrain refining / hard phase | 2 – 4 | 3 |
| Sn | ≤ 0.2 | — |
| Pb | ≤ 0.2 | — |
| Znremainder, nominally 21–25 % | balance | — |
C86100-M07 — frequently asked
What is C86100-M07 used for?
C86100-M07 is typically used for gears, marine hardware, propeller hubs and bushings. In short: strongest cast manganese bronze; high-load gear alloy; hard, wear-resistant castings.
What is the yield strength of C86100-M07?
C86100-M07 has a typical yield strength of 425 MPa (61.6 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 83% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C86100-M07 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 57% of copper alloy grades). Machines like a tough, gummy high-strength brass — use rigid setups, sharp carbide, positive rake, moderate speed and heavy coolant; rating only ~25–30 % of free-cutting brass.
Can C86100-M07 be welded?
Not readily — weldability is rated poor (30/100). GMAW/GTAW with matching aluminium-bronze or Mn-bronze filler is possible but the Al-rich oxide and Zn fuming demand preheat control; oxyacetylene welding and soldering are not recommended.
What surface finishes work on C86100-M07?
Takes a bright mechanical polish; chemical blackening or clear lacquer for decorative use; avoid anodizing and avoid tight-clearance chrome plating on porous cast surfaces.
Can C86100-M07 be formed, bent or molded?
Cast-only alloy — good fluidity in sand, permanent mould, centrifugal and continuous casting; keep gating quiet to avoid Al/Zn oxide films and use chills for heavy sections.
What is the maximum service temperature of C86100-M07?
C86100-M07 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 C86100-M01 and C86100-M02?
M01 is the default condition — standard commercial condition for gears, bearings and marine hardware poured in sand moulds. M02: pick for large rings, bushings and gear blanks where the denser, finer-grained centrifugal structure raises strength and soundness. Yield strength is 415 MPa in M01 versus 430 MPa in M02.
Sources
- ASTM B584 — Standard Specification for Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- CDA Standard Designation C86100 alloy datasheet — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 15 — Casting — ASM International (2008)
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.