Copper Alloy C96700-TB00
Heat-treated state
UNS C96700
TB00 = solution heat treated
Softest condition — used for rough machining, straightening or forming before precipitation aging.
Values for the TB00 condition
Other C96700 tempers and conditions
C96700 is listed in 3 conditions; see the grade overview at C96700.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
TB00This page Solution heat treated | Softest condition — used for rough machining, straightening or forming before precipitation aging. | 240 | 450 | 20 | 120 HB | 4 % IACS |
As sand cast | Pick only for rough/oversize castings that will be solution treated and aged afterwards. | 275 | 450 | 10 | 150 HB | 5 % IACS |
TF00Default Solution heat treated and precipitation hardened | Standard supply condition: maximum strength and wear resistance for tooling, bearings and non-sparking parts. | 620 | 760 | 5 | 34 HRC | 6 % IACS |
What is C96700-TB00?
C96700-TB00 is C96700 heat treated to TB00 — softest condition — used for rough machining, straightening or forming before precipitation aging. C96700-TB00 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 52% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 148 GPa (21.5 Msi). C96700-TB00 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 1,080°C (1,976 °F). TF00 is the default condition FabDigit quotes; TB00 is available on request or by drawing note.
Advantages
- Stiff — 148 GPa (21.5 Msi), better than 97% of copper alloy grades
- Good corrosion resistance — 78/100, better than 94% of copper alloy grades
Limitations
- Poor heat conductor — 26 W/m·K (15 BTU/hr·ft·°F), worse than 98% of copper alloy grades
- Low electrical conductivity — 4 % IACS, worse than 98% of copper alloy grades
- High embodied carbon — 8.5 kg CO₂/kg, worse than 98% of copper alloy grades
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
C96700-TB00 properties
Typical room-temperature values for C96700-TB00; 22 are specific to this condition. Other listed values are C96700 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C96700-TB00 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 1,080°C (1,976 °F).
Mechanical13
C96700-TB00 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 52% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 148 GPa (21.5 Msi).
Thermal5
C96700-TB00 is rated for continuous service to 150°C (302 °F). It conducts heat at 26 W/m·K (15 BTU/hr·ft·°F), worse than 98% of copper alloy grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
C96700-TB00 conducts electricity at 4 % IACS, worse than 98% 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 C96700-TB00 takes about 130 MJ of energy and emits 8.5 kg of CO₂ — more than 99% of copper alloy grades. Typical recycled content is 25%.
Manufacturability7
C96700-TB00's machinability is fair (38/100, better than 55% of copper alloy grades); weldability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C96700-TB00
Is C96700 easy to machine?
Machine in the solution-treated (TB00) state where possible; in TF00 use rigid setups, sharp carbide, positive rake and modest speeds — beryllium-containing dust and fume require local exhaust and wet methods.
Can C96700 be welded?
GTAW with matching Cu-Ni-Be or Cu-Ni filler is feasible on clean surfaces; the heat-affected zone loses aged strength, so re-solutionize and re-age critical weldments.
Can C96700 be formed, bent or molded?
Supplied as sand or investment castings with generous risers due to a wide freezing range; forming is limited to light straightening in the soft TB00 condition.
What surface finishes work on C96700?
Takes a fine polish for bearing surfaces; not anodizable — use passivation, chemical blackening, electroless nickel or hard chrome where extra wear/corrosion life is needed.
C96700 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 |
|---|---|---|
| Niincludes Co | 29 – 33 | 31 |
| Beprecipitation hardener | 1.1 – 1.2 | 1.15 |
| Fe | 0.4 – 1 | 0.7 |
| Mn | ≤ 1 | 0.5 |
| Si | ≤ 0.15 | — |
| C | ≤ 0.1 | — |
| Pb | ≤ 0.01 | — |
| Cu | balance | — |
C96700-TB00 — frequently asked
What is C96700-TB00 used for?
C96700-TB00 is typically used for mold and die inserts, bearings and bushings, non-sparking tools and downhole/oilfield wear components. In short: hardest cast Cu-Ni-Be; non-sparking, non-magnetic; tooling and bearing grade.
What is the yield strength of C96700-TB00?
C96700-TB00 has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 52% of copper alloy grades. Strength varies by condition: see the 3 listed tempers.
Is C96700-TB00 easy to machine?
Not especially — machinability is rated fair (38/100, better than 55% of copper alloy grades). Machine in the solution-treated (TB00) state where possible; in TF00 use rigid setups, sharp carbide, positive rake and modest speeds — beryllium-containing dust and fume require local exhaust and wet methods.
Can C96700-TB00 be welded?
With care — weldability is rated fair (45/100). GTAW with matching Cu-Ni-Be or Cu-Ni filler is feasible on clean surfaces; the heat-affected zone loses aged strength, so re-solutionize and re-age critical weldments.
What surface finishes work on C96700-TB00?
Takes a fine polish for bearing surfaces; not anodizable — use passivation, chemical blackening, electroless nickel or hard chrome where extra wear/corrosion life is needed.
Can C96700-TB00 be formed, bent or molded?
Supplied as sand or investment castings with generous risers due to a wide freezing range; forming is limited to light straightening in the soft TB00 condition.
What is the maximum service temperature of C96700-TB00?
C96700-TB00 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C96700-TF00 and C96700-TB00?
TF00 is the default condition — standard supply condition: maximum strength and wear resistance for tooling, bearings and non-sparking parts. TB00: softest condition — used for rough machining, straightening or forming before precipitation aging. Yield strength is 620 MPa in TF00 versus 240 MPa in TB00.
Sources
- ASTM B770 — Standard Specification for Copper-Beryllium Alloy Sand Castings for General Applications — ASTM International (2019)
- CDA/UNS Cast Copper Alloy Data — C96700 — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol.2: Properties and Selection — Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- Cast nickel-beryllium copper (Alloy 72C) tooling and bearing alloy datasheet — specialty copper-alloy foundries (2022)
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.