Copper Alloy C99500-M06
Finish state
UNS C99500
M06 = as investment cast
Continuous-cast bar/tube stock for machined bearings and wear parts; fine, uniform structure with good machining response.
Values for the M06 condition
Other C99500 tempers and conditions
C99500 is listed in 5 conditions; see the grade overview at C99500.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard stocked condition for pump and valve castings; best balance of strength and ductility without heat treatment. | 235 | 450 | 12 | 135 HB | 6 % IACS |
M06This page As investment cast | Continuous-cast bar/tube stock for machined bearings and wear parts; fine, uniform structure with good machining response. | 250 | 470 | 12 | 140 HB | 6 % IACS |
As centrifugally cast | Choose for bushings, sleeves and rings needing dense, porosity-free walls and slightly higher strength than sand cast. | 255 | 480 | 12 | 145 HB | 6 % IACS |
As continuous cast | Permanent-mold production of medium-volume parts; faster solidification raises strength and hardness modestly. | 255 | 480 | 11 | 145 HB | 6 % IACS |
Solution heat treated and precipitation hardened | Pick when maximum strength, hardness and wear resistance are needed and lower ductility is acceptable. | 310 | 520 | 8 | 170 HB | 7 % IACS |
What is C99500-M06?
C99500-M06 is C99500 supplied in the M06 condition — continuous-cast bar/tube stock for machined bearings and wear parts; fine, uniform structure with good machining response. C99500-M06 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 470 MPa (68.2 ksi) — stronger than 54% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 115 GPa (16.7 Msi). C99500-M06 has a density of 8.2 g/cm³ (0.296 lb/in³), lighter than 85% of copper alloy grades. It melts at 998°C (1,828 °F). M01 is the default condition FabDigit quotes; M06 is available on request or by drawing note.
Advantages
- High service temperature — 260°C (500 °F), better than 75% of copper alloy grades
Limitations
- Low electrical conductivity — 6 % IACS, worse than 93% of copper alloy grades
- Limited formability — 10/100, worse than 89% of copper alloy grades
- Hard to polish — 65/100, worse than 87% of copper alloy grades
- Poor heat conductor — 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 86% of copper alloy grades
C99500-M06 properties
Typical room-temperature values for C99500-M06; 21 are specific to this condition. Other listed values are C99500 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C99500-M06 has a density of 8.2 g/cm³ (0.296 lb/in³), lighter than 85% of copper alloy grades. It melts at 998°C (1,828 °F).
Mechanical15
C99500-M06 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 470 MPa (68.2 ksi) — stronger than 54% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 115 GPa (16.7 Msi).
Thermal6
C99500-M06 is rated for continuous service to 260°C (500 °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 17 µm/m·K (9.44 µin/in·°F).
Electrical3
C99500-M06 conducts electricity at 6 % IACS, worse than 93% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (71/100), better than 80% of copper alloy grades.
Sustainability4
Producing a kilogram of C99500-M06 takes about 55 MJ of energy and emits 4 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 65%.
Manufacturability8
C99500-M06's machinability is fair (40/100, better than 57% of copper alloy grades); weldability fair (35/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C99500-M06
Is C99500 easy to machine?
Machines like a hard silicon/aluminum bronze — use sharp carbide, positive rake, moderate speeds and rigid setups; chips are tough and stringy, rating ~30 % of free-cutting brass.
Can C99500 be welded?
GTAW/GMAW with aluminum-bronze or Cu-Ni filler is possible for repair, but oxide films and hot-short zones demand preheat 150–200 °C, thorough cleaning and low heat input.
Can C99500 be formed, bent or molded?
Cast-only alloy: sand, centrifugal, continuous and permanent-mold routes; needs good gating/feeding because of the pasty freezing range and Al/Si dross tendency.
What surface finishes work on C99500?
Not anodizable; finish by shot blasting, machining and polishing, or apply nickel/tin plating or clear lacquer for appearance and added seawater protection.
C99500 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 |
|---|---|---|
| NiNi + Co | 3.5 – 5.5 | 4.5 |
| Fe | 3 – 5 | 4 |
| Alprecipitation strengthening with Ni/Fe | 0.5 – 2 | 1.2 |
| Si | 0.5 – 2 | 1 |
| Mn | ≤ 0.5 | 0.3 |
| Zn | 12 – 20 | 16 |
| Pbimpurity max; low-lead alloy suitable for potable-water valve bodies | ≤ 0.25 | — |
| CuCDA specifies Cu 39.0 % min plus balance; typical heats run ~70–76 % Cu | ≥ 39 (balance) | — |
C99500-M06 — frequently asked
What is C99500-M06 used for?
C99500-M06 is typically used for marine valve trim, pump and propeller components and industrial wear parts. In short: marine wear-resistant Cu-Ni-Fe casting; repair-weldable specialty grade; tough, stringy chips.
What is the yield strength of C99500-M06?
C99500-M06 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 470 MPa (68.2 ksi) — stronger than 54% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C99500-M06 easy to machine?
Not especially — machinability is rated fair (40/100, better than 57% of copper alloy grades). Machines like a hard silicon/aluminum bronze — use sharp carbide, positive rake, moderate speeds and rigid setups; chips are tough and stringy, rating ~30 % of free-cutting brass.
Can C99500-M06 be welded?
With care — weldability is rated fair (35/100). GTAW/GMAW with aluminum-bronze or Cu-Ni filler is possible for repair, but oxide films and hot-short zones demand preheat 150–200 °C, thorough cleaning and low heat input.
What surface finishes work on C99500-M06?
Not anodizable; finish by shot blasting, machining and polishing, or apply nickel/tin plating or clear lacquer for appearance and added seawater protection.
Can C99500-M06 be formed, bent or molded?
Cast-only alloy: sand, centrifugal, continuous and permanent-mold routes; needs good gating/feeding because of the pasty freezing range and Al/Si dross tendency.
What is the maximum service temperature of C99500-M06?
C99500-M06 is rated for continuous use to about 260°C (500 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C99500-M01 and C99500-TF00?
M01 is the default condition — standard stocked condition for pump and valve castings; best balance of strength and ductility without heat treatment. TF00: pick when maximum strength, hardness and wear resistance are needed and lower ductility is acceptable. Yield strength is 235 MPa in M01 versus 310 MPa in TF00.
Sources
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- ASTM B763 — Copper Alloy Sand Castings for Valve Applications — ASTM International (2020)
- ASTM B601 — Temper Designations for Copper and Copper Alloys — ASTM International (2019)
- CDA Copper Alloy Database, UNS C99500 — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
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.