Copper Alloy C96800
UNS C96800
C96800 is a spinodal-hardening copper-nickel-tin cast alloy that reaches bronze-like strength and wear resistance without beryllium.
Reference datasheet — C96800 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the TX00 condition
C96800 tempers and conditions
C96800 is supplied in 4 conditions, soft to hard. TX00 is the default FabDigit quotes; the values on this page are for it.
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 | 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?
C96800 is a spinodal-hardening copper-nickel-tin cast alloy that reaches bronze-like strength and wear resistance without beryllium. Aged material provides 655 MPa yield, 790 MPa tensile, 6% elongation and 285 HB (30 HRC), with 35 W/m·K thermal conductivity, 8% IACS, service to 260 °C, machinability score 55 and corrosion resistance score 76; it is supplied as continuous, centrifugal and sand castings in M01, TB00, TX00 and TX00-OA conditions. Fusion welding is not recommended and ammonia-bearing environments should be avoided. C96700 is the nearest alternative when higher hardness is required. C96800 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). C96800 has a yield strength of 655 MPa (95 ksi) and a tensile strength of 790 MPa (115 ksi) — stronger than 96% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 140 GPa (20.3 Msi).
What is C96800 used for?
- heavy-duty bearings
- worm gears
- bushings
- wear plates
Advantages
- Stiff — 140 GPa (20.3 Msi), better than 97% of copper alloy grades
- High strength — 655 MPa (95 ksi), better than 96% of copper alloy grades
- Good corrosion resistance — 76/100, better than 91% of copper alloy grades
- High service temperature — 260°C (500 °F), better than 75% of copper alloy grades
Limitations
- Limited ductility — 6%, worse than 89% of copper alloy grades
- Poor heat conductor — 35 W/m·K (20.2 BTU/hr·ft·°F), worse than 88% of copper alloy grades
- High embodied carbon — 5.2 kg CO₂/kg, worse than 88% of copper alloy grades
- Low electrical conductivity — 8 % IACS, worse than 81% of copper alloy grades
C96800 properties
Typical room-temperature values for C96800-TX00; bars are the position among copper alloy grades.
Physical3
C96800 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 has a yield strength of 655 MPa (95 ksi) and a tensile strength of 790 MPa (115 ksi) — stronger than 96% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 140 GPa (20.3 Msi).
Thermal6
C96800 is rated for continuous service to 260°C (500 °F). It conducts heat at 35 W/m·K (20.2 BTU/hr·ft·°F), worse than 88% of copper alloy grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
C96800 conducts electricity at 8 % IACS, worse than 81% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (76/100), better than 91% of copper alloy grades.
Sustainability4
Producing a kilogram of C96800 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's machinability is good (55/100, better than 71% of copper alloy grades); weldability poor (30/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C96800 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C96800
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.
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 |
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.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
How much does C96800 cost?
C96800 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C96800 — frequently asked
What is C96800 used for?
C96800 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?
C96800 has a typical yield strength of 655 MPa (95 ksi) and a tensile strength of 790 MPa (115 ksi) — stronger than 96% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C96800 easy to machine?
Reasonably — machinability is rated good (55/100, better than 71% 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 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?
Takes a fine polish for bearing surfaces; can be electroless-nickel or chrome plated, but no anodizing — protect against ammonia-bearing environments.
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 is the maximum service temperature of C96800?
C96800 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 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.
How much does C96800 cost?
C96800 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.