Copper Alloy C96800 TX00-OA
Precip hard
UNS C96800
Choose when impact toughness, dimensional stability at elevated temperature or reduced notch sensitivity matters more than peak hardness.
Values for the TX00-OA condition
Other C96800 tempers and conditions
C96800 is listed in 4 conditions; see the grade overview at C96800.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution heat treated | Softest, most ductile condition — used for straightening, sizing or rough machining before spinodal aging. | 240 | 470 | 25 | 140 HB | 6 % IACS |
As sand cast | Lowest-cost condition for lightly loaded parts or for stock that will be heat treated after rough machining. | 310 | 500 | 12 | 170 HB | 7 % IACS |
TX00-OAThis page TX00 | Choose when impact toughness, dimensional stability at elevated temperature or reduced notch sensitivity matters more than peak hardness. | 550 | 690 | 10 | 23 HRC | 10 % IACS |
TX00Default Solution treated and spinodally hardened | Standard supplied condition — peak strength, hardness and wear/galling resistance for bearings, bushings and gears. | 655 | 790 | 6 | 30 HRC | 8 % IACS |
What is C96800 TX00-OA?
C96800 TX00-OA is C96800 in the TX00-OA condition — choose when impact toughness, dimensional stability at elevated temperature or reduced notch sensitivity matters more than peak hardness. C96800 TX00-OA has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 92% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 140 GPa (20.3 Msi). C96800 TX00-OA has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 77% of copper alloy grades. It melts at 1,030°C (1,886 °F). TX00 is the default condition FabDigit quotes; TX00-OA is available on request or by drawing note.
Advantages
- Stiff — 140 GPa (20.3 Msi), better than 97% of copper alloy grades
- Good corrosion resistance — 78/100, better than 94% of copper alloy grades
- High strength — 550 MPa (79.8 ksi), better than 92% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
Limitations
- High embodied carbon — 5.2 kg CO₂/kg, worse than 88% of copper alloy grades
- Poor heat conductor — 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 80% of copper alloy grades
- Limited ductility — 10%, worse than 76% of copper alloy grades
C96800 TX00-OA properties
Typical room-temperature values for C96800 TX00-OA; 22 are specific to this condition. Other listed values are C96800 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C96800 TX00-OA has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 77% of copper alloy grades. It melts at 1,030°C (1,886 °F).
Mechanical15
C96800 TX00-OA has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 92% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 140 GPa (20.3 Msi).
Thermal6
C96800 TX00-OA 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 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
C96800 TX00-OA conducts electricity at 10 % IACS, worse than 74% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 94% of copper alloy grades.
Sustainability4
Producing a kilogram of C96800 TX00-OA takes about 72 MJ of energy and emits 5.2 kg of CO₂ — more than 86% of copper alloy grades. Typical recycled content is 25%.
Manufacturability8
C96800 TX00-OA's machinability is good (58/100, better than 73% of copper alloy grades); weldability poor (30/100); formability poor (32/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C96800 TX00-OA
Is C96800 easy to machine?
Machines like a hard bronze — rigid setups, sharp carbide inserts, moderate speed with positive rake and generous coolant; chips are short and the aged material is abrasive on tool edges.
Can C96800 be welded?
Fusion welding is not recommended (hot-crack sensitive and it destroys the spinodal structure in the HAZ); repair by mechanical joining or re-solution-treat and re-age if welding is unavoidable.
Can C96800 be formed, bent or molded?
Cast to shape (continuous, centrifugal or sand) then solution treat, quench and spinodal age; cold forming only in the soft TB00 condition.
What surface finishes work on C96800?
Takes a fine polish for bearing surfaces; can be electroless-nickel or chrome plated, but no anodizing — protect against ammonia-bearing environments.
C96800 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 |
|---|---|---|
| Ni | 9.5 – 10.5 | 10 |
| Sn | 7.5 – 8.5 | 8 |
| Nbgrain refiner | 0.1 – 0.3 | 0.2 |
| Mgdeoxidizer | ≤ 0.15 | 0.08 |
| Fe | ≤ 0.5 | — |
| Zn | ≤ 0.5 | — |
| Mn | ≤ 0.3 | — |
| Pb | ≤ 0.02 | — |
| S | ≤ 0.05 | — |
| Curemainder, ~81% | balance | — |
C96800 TX00-OA — frequently asked
What is C96800 TX00-OA used for?
C96800 TX00-OA is typically used for heavy-duty bearings, worm gears, bushings and wear plates. In short: beryllium-free high-strength casting; spinodal-hardened bearing alloy; bronze-like wear resistance.
What is the yield strength of C96800 TX00-OA?
C96800 TX00-OA has a typical yield strength of 550 MPa (79.8 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 92% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C96800 TX00-OA easy to machine?
Reasonably — machinability is rated good (58/100, better than 73% of copper alloy grades). Machines like a hard bronze — rigid setups, sharp carbide inserts, moderate speed with positive rake and generous coolant; chips are short and the aged material is abrasive on tool edges.
Can C96800 TX00-OA be welded?
Not readily — weldability is rated poor (30/100). Fusion welding is not recommended (hot-crack sensitive and it destroys the spinodal structure in the HAZ); repair by mechanical joining or re-solution-treat and re-age if welding is unavoidable.
What surface finishes work on C96800 TX00-OA?
Takes a fine polish for bearing surfaces; can be electroless-nickel or chrome plated, but no anodizing — protect against ammonia-bearing environments.
Can C96800 TX00-OA be formed, bent or molded?
Cast to shape (continuous, centrifugal or sand) then solution treat, quench and spinodal age; cold forming only in the soft TB00 condition.
What is the maximum service temperature of C96800 TX00-OA?
C96800 TX00-OA 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 C96800-TX00 and C96800-TB00?
TX00 is the default condition — standard supplied condition — peak strength, hardness and wear/galling resistance for bearings, bushings and gears. TB00: softest, most ductile condition — used for straightening, sizing or rough machining before spinodal aging. Yield strength is 655 MPa in TX00 versus 240 MPa in TB00.
Sources
- ASTM B505/B505M — Continuous Cast Copper Alloys — ASTM International (2022)
- ASTM B929 — Continuous Cast Copper-Nickel-Tin Spinodal Alloys — ASTM International (2021)
- CDA Alloy Database — C96800 — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Cu-Ni-Sn spinodal alloy bar and bushing datasheets — Materion / cast bronze producers (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.