Copper Alloy C99600-F (As fabricated)
Temper · default condition
UNS C99600
Standard stocked condition: best vibration-damping capacity with moderate strength — pick for noise/vibration-control housings, bedplates and marine parts.
Values for the F condition
Other C99600 tempers and conditions
C99600 is listed in 2 conditions; see the grade overview at C99600.
- F
- HT
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FDefaultThis page As fabricated | Standard stocked condition: best vibration-damping capacity with moderate strength — pick for noise/vibration-control housings, bedplates and marine parts. | 193 | 434 | 20 | 115 HB | 2.5 % IACS |
Heat treated | Choose when higher strength and hardness are needed for gears, wear plates and heavily loaded structural castings, accepting some loss of damping and ductility. | 275 | 550 | 12 | 180 HB | 2.4 % IACS |
What is C99600-F?
C99600-F is C99600 in the F temper — standard stocked condition: best vibration-damping capacity with moderate strength — pick for noise/vibration-control housings, bedplates and marine parts. C99600-F has a yield strength of 193 MPa (28 ksi) and a tensile strength of 434 MPa (62.9 ksi) — weaker than 56% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 96 GPa (13.9 Msi). C99600-F has a density of 7.5 g/cm³ (0.271 lb/in³), lighter than 98% of copper alloy grades. It melts at 900°C (1,652 °F).
Advantages
- Lightweight — 7.5 g/cm³ (0.271 lb/in³), better than 98% of copper alloy grades
Limitations
- Poor heat conductor — 16 W/m·K (9.24 BTU/hr·ft·°F), worse than 100% of copper alloy grades
- Low electrical conductivity — 2.5 % IACS, worse than 100% of copper alloy grades
- Needs corrosion protection — 45/100, worse than 98% of copper alloy grades
- Hard to polish — 55/100, worse than 97% of copper alloy grades
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
C99600-F properties
Typical room-temperature values for C99600-F; 31 are specific to this condition. Other listed values are C99600 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C99600-F has a density of 7.5 g/cm³ (0.271 lb/in³), lighter than 98% of copper alloy grades. It melts at 900°C (1,652 °F).
Mechanical13
C99600-F has a yield strength of 193 MPa (28 ksi) and a tensile strength of 434 MPa (62.9 ksi) — weaker than 56% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 96 GPa (13.9 Msi).
Thermal6
C99600-F is rated for continuous service to 150°C (302 °F). It conducts heat at 16 W/m·K (9.24 BTU/hr·ft·°F), worse than 100% of copper alloy grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
C99600-F conducts electricity at 2.5 % IACS, worse than 100% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is fair (45/100), worse than 98% of copper alloy grades.
Sustainability4
Producing a kilogram of C99600-F takes about 60 MJ of energy and emits 4.5 kg of CO₂ — more than 69% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
C99600-F's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability fair (40/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C99600-F
Is C99600 easy to machine?
Tough, work-hardening Cu-Mn matrix: use sharp positive-rake carbide, low speed (60–110 m/min), heavy feed and flood coolant to avoid built-up edge and smearing.
Can C99600 be welded?
GTAW/GMAW with matching Cu-Mn-Al filler under argon; keep interpass temperature low, avoid dilution with steel and stress-relieve to restore damping.
Can C99600 be formed, bent or molded?
Supplied as sand or centrifugal castings — degas and control Mn oxidation loss with covering flux; generous fillets and controlled solidification prevent hot tearing; cold forming is not practical.
What surface finishes work on C99600?
Not anodizable; use epoxy/marine paint, nickel plating or chemical conversion for corrosion protection — bare surfaces darken and can dealloy in seawater.
C99600 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 |
|---|---|---|
| Mnprovides the antiferromagnetic, high-damping matrix | 39 – 45 | 42 |
| Alstrengthener / deoxidiser | 1 – 2.8 | 2 |
| Feimpurity limit | ≤ 0.25 | 0.1 |
| Curemainder, nominally ~54–58 % | balance | — |
C99600-F — frequently asked
What is C99600-F used for?
C99600-F is typically used for gears, wear plates and heavy-duty structural castings. In short: high-strength cast Cu-Mn; wear-resistant gear bronze; heat-treatable cast copper.
What is the yield strength of C99600-F?
C99600-F has a typical yield strength of 193 MPa (28 ksi) and a tensile strength of 434 MPa (62.9 ksi) — weaker than 56% of copper alloy grades. Strength varies by condition: see the 2 listed tempers.
Is C99600-F easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Tough, work-hardening Cu-Mn matrix: use sharp positive-rake carbide, low speed (60–110 m/min), heavy feed and flood coolant to avoid built-up edge and smearing.
Can C99600-F be welded?
With care — weldability is rated fair (40/100). GTAW/GMAW with matching Cu-Mn-Al filler under argon; keep interpass temperature low, avoid dilution with steel and stress-relieve to restore damping.
What surface finishes work on C99600-F?
Not anodizable; use epoxy/marine paint, nickel plating or chemical conversion for corrosion protection — bare surfaces darken and can dealloy in seawater.
Can C99600-F be formed, bent or molded?
Supplied as sand or centrifugal castings — degas and control Mn oxidation loss with covering flux; generous fillets and controlled solidification prevent hot tearing; cold forming is not practical.
What is the maximum service temperature of C99600-F?
C99600-F 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 C99600-F and C99600-HT?
F is the default condition — standard stocked condition: best vibration-damping capacity with moderate strength — pick for noise/vibration-control housings, bedplates and marine parts. HT: choose when higher strength and hardness are needed for gears, wear plates and heavily loaded structural castings, accepting some loss of damping and ductility. Yield strength is 193 MPa in F versus 275 MPa in HT.
Sources
- Copper Alloy C99600 alloy data (UNS registration, special cast copper alloys) — Copper Development Association (copper.org) (2023)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 3 — Alloy Phase Diagrams (Cu-Mn system) — ASM International (1992)
- High-damping manganese-copper alloys (INCRA project reports) — International Copper Research Association (1980)
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.