Copper Alloy C99500-TF00
Precip hard
UNS C99500
TF00 = solution heat treated and precipitation hardened
Pick when maximum strength, hardness and wear resistance are needed and lower ductility is acceptable.
Values for the TF00 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 |
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 |
TF00This page 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-TF00?
C99500-TF00 is C99500 in the TF00 condition — pick when maximum strength, hardness and wear resistance are needed and lower ductility is acceptable. C99500-TF00 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 118 GPa (17.1 Msi). C99500-TF00 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; TF00 is available on request or by drawing note.
Advantages
- High service temperature — 260°C (500 °F), better than 75% of copper alloy grades
Limitations
- Limited formability — 5/100, worse than 98% of copper alloy grades
- Hard to polish — 65/100, worse than 87% of copper alloy grades
- Low electrical conductivity — 7 % IACS, worse than 86% of copper alloy grades
- Poor heat conductor — 38 W/m·K (22 BTU/hr·ft·°F), worse than 84% of copper alloy grades
- Limited ductility — 8%, worse than 83% of copper alloy grades
C99500-TF00 properties
Typical room-temperature values for C99500-TF00; 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-TF00 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-TF00 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 118 GPa (17.1 Msi).
Thermal6
C99500-TF00 is rated for continuous service to 260°C (500 °F). It conducts heat at 38 W/m·K (22 BTU/hr·ft·°F), worse than 84% of copper alloy grades. Thermal expansion is 17 µm/m·K (9.44 µin/in·°F).
Electrical3
C99500-TF00 conducts electricity at 7 % IACS, worse than 86% 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 C99500-TF00 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-TF00's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability poor (30/100); formability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C99500-TF00
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-TF00 — frequently asked
What is C99500-TF00 used for?
C99500-TF00 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-TF00?
C99500-TF00 has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 64% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C99500-TF00 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% 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-TF00 be welded?
Not readily — weldability is rated poor (30/100). 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-TF00?
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-TF00 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-TF00?
C99500-TF00 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.