Copper Alloy C84800 Continuous Cast
Finish state
UNS C84800 · ASTM B584
Choose for machined-from-bar fittings and bushings: finer, denser structure and better machined surface than sand cast.
Values for the Continuous Cast condition
Other C84800 tempers and conditions
C84800 is listed in 3 conditions; see the grade overview at C84800.
- As Cast
- Centrifugal Cast
- Continuous Cast
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As CastDefault sand cast, no heat treatment (ASTM B584) | Standard stocked condition: sand-cast valve bodies, fittings and general-purpose castings. | 124 | 262 | 35 | 55 HB | 16 % IACS |
as cast, spun mould (ASTM B271) | Choose for rings, bushings and large-bore sleeves needing denser, more sound metal than sand casting. | 131 | 276 | 32 | 58 HB | 16 % IACS |
Continuous CastThis page as cast bar/tube (ASTM B505) | Choose for machined-from-bar fittings and bushings: finer, denser structure and better machined surface than sand cast. | 138 | 283 | 30 | 60 HB | 16 % IACS |
What is C84800 Continuous Cast?
C84800 Continuous Cast is C84800 supplied in the Continuous Cast condition — choose for machined-from-bar fittings and bushings: finer, denser structure and better machined surface than sand cast. C84800 Continuous Cast has a yield strength of 138 MPa (20 ksi) and a tensile strength of 283 MPa (41 ksi) — weaker than 76% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 86 GPa (12.5 Msi). C84800 Continuous Cast has a density of 8.55 g/cm³ (0.309 lb/in³), lighter than 60% of copper alloy grades. It melts at 843°C (1,549 °F). As Cast is the default condition FabDigit quotes; Continuous Cast is available on request or by drawing note.
Advantages
- Easy to machine — 90/100, better than 98% of copper alloy grades
- Low embodied carbon — 3 kg CO₂/kg, better than 97% of copper alloy grades
- Ductile — tolerates forming and impact — 30%, better than 75% of copper alloy grades
Limitations
- Hard to polish — 55/100, worse than 97% of copper alloy grades
- Low stiffness — 86 GPa (12.5 Msi), worse than 96% of copper alloy grades
- Difficult to weld — 20/100, worse than 88% of copper alloy grades
- Low strength — 138 MPa (20 ksi), worse than 76% of copper alloy grades
C84800 Continuous Cast properties
Typical room-temperature values for C84800 Continuous Cast; 20 are specific to this condition. Other listed values are C84800 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C84800 Continuous Cast has a density of 8.55 g/cm³ (0.309 lb/in³), lighter than 60% of copper alloy grades. It melts at 843°C (1,549 °F).
Mechanical10
C84800 Continuous Cast has a yield strength of 138 MPa (20 ksi) and a tensile strength of 283 MPa (41 ksi) — weaker than 76% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 86 GPa (12.5 Msi).
Thermal6
C84800 Continuous Cast is rated for continuous service to 200°C (392 °F). It conducts heat at 72 W/m·K (41.6 BTU/hr·ft·°F), worse than 52% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C84800 Continuous Cast conducts electricity at 16 % IACS, worse than 52% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 68% of copper alloy grades.
Sustainability4
Producing a kilogram of C84800 Continuous Cast takes about 45 MJ of energy and emits 3 kg of CO₂ — less than 97% of copper alloy grades. Typical recycled content is 85%.
Manufacturability5
C84800 Continuous Cast's machinability is excellent (90/100, better than 98% of copper alloy grades); weldability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C84800 Continuous Cast
Is C84800 easy to machine?
Excellent free-machining behaviour from the lead phase (≈90 % of C36000); use sharp positive-rake tools, light feeds and flood coolant, and observe lead-fume/swarf handling rules.
Can C84800 be welded?
Not suited to fusion welding — lead causes hot cracking; join by soft soldering (excellent) or careful low-temperature brazing, or by mechanical/threaded joints.
Can C84800 be formed, bent or molded?
A casting alloy only: fluid, forgiving in green sand, permanent mould, centrifugal and continuous casting; feed heavy sections well to avoid interdendritic shrinkage and lead sweat.
What surface finishes work on C84800?
Machines to a good matt surface; buffs to moderate lustre only (lead smear, micro-porosity). Takes nickel/chrome electroplating with proper alkaline cleaning; passivation or lacquer prevents tarnish.
C84800 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 |
|---|---|---|
| Cu | 75 – 77 | 76 |
| Sn | 2 – 3 | 2.5 |
| Pb | 5.5 – 7 | 6.2 |
| Niincluding cobalt | ≤ 1 | — |
| Fe | ≤ 0.4 | — |
| Sb | ≤ 0.25 | — |
| S | ≤ 0.08 | — |
| P | ≤ 0.02 | — |
| Al | ≤ 0.01 | — |
| Si | ≤ 0.01 | — |
| Znbalance zinc | ≥ 13 (balance) | — |
C84800 Continuous Cast — frequently asked
What is C84800 Continuous Cast used for?
C84800 Continuous Cast is typically used for low-pressure valve bodies, pipe fittings and flanges, water meter housings, pump housings and covers, pressure-tight plumbing hardware and bushings and bearing sleeves. In short: high-friction wear resistance.
What is the yield strength of C84800 Continuous Cast?
C84800 Continuous Cast has a typical yield strength of 138 MPa (20 ksi) and a tensile strength of 283 MPa (41 ksi) — weaker than 76% of copper alloy grades. Strength varies by condition: see the 3 listed tempers.
Is C84800 Continuous Cast easy to machine?
Yes — machinability is rated excellent (90/100, better than 98% of copper alloy grades). Excellent free-machining behaviour from the lead phase (≈90 % of C36000); use sharp positive-rake tools, light feeds and flood coolant, and observe lead-fume/swarf handling rules.
Can C84800 Continuous Cast be welded?
Not readily — weldability is rated poor (20/100). Not suited to fusion welding — lead causes hot cracking; join by soft soldering (excellent) or careful low-temperature brazing, or by mechanical/threaded joints.
What surface finishes work on C84800 Continuous Cast?
Machines to a good matt surface; buffs to moderate lustre only (lead smear, micro-porosity). Takes nickel/chrome electroplating with proper alkaline cleaning; passivation or lacquer prevents tarnish.
Can C84800 Continuous Cast be formed, bent or molded?
A casting alloy only: fluid, forgiving in green sand, permanent mould, centrifugal and continuous casting; feed heavy sections well to avoid interdendritic shrinkage and lead sweat.
What is the maximum service temperature of C84800 Continuous Cast?
C84800 Continuous Cast is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in C84800 Continuous Cast?
Yes — C84800 Continuous Cast is available for CNC machining; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B584 — Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- ASTM B271/B271M — Copper-Base Alloy Centrifugal Castings — ASTM International (2019)
- CDA Alloy Datasheet C84800 (Leaded Semi-Red Brass) — Copper Development Association / copper.org (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
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.