Copper Alloy C84400 Continuous Cast
Finish state
UNS C84400 · ASTM B584
Pick for machined bushings, bar stock and tube blanks — finer, denser structure gives slightly higher strength and hardness than sand cast.
Values for the Continuous Cast condition
Other C84400 tempers and conditions
C84400 is listed in 3 conditions; see the grade overview at C84400.
- 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, as-cast (M01) | Standard ASTM B584 sand-cast condition — the way virtually all C84400 valve bodies and fittings are supplied. | 110 | 234 | 26 | 55 HB | 16.4 % IACS |
ASTM B271 spun-cast rings and sleeves | Use for large-diameter rings, sleeves and pump wear parts where a dense, void-free wall is required. | 117 | 241 | 22 | 58 HB | 16.4 % IACS |
Continuous CastThis page ASTM B505 continuous/permanent-mould cast bar and tube | Pick for machined bushings, bar stock and tube blanks — finer, denser structure gives slightly higher strength and hardness than sand cast. | 124 | 248 | 20 | 60 HB | 16.4 % IACS |
What is C84400 Continuous Cast?
C84400 Continuous Cast is C84400 supplied in the Continuous Cast condition — pick for machined bushings, bar stock and tube blanks — finer, denser structure gives slightly higher strength and hardness than sand cast. C84400 Continuous Cast has a yield strength of 124 MPa (18 ksi) and a tensile strength of 248 MPa (36 ksi) — weaker than 78% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 95 GPa (13.8 Msi). C84400 Continuous Cast has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% 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 — 3.2 kg CO₂/kg, better than 92% of copper alloy grades
Limitations
- Low stiffness — 95 GPa (13.8 Msi), worse than 93% of copper alloy grades
- Hard to polish — 60/100, worse than 92% of copper alloy grades
- Limited formability — 10/100, worse than 89% of copper alloy grades
- Difficult to weld — 20/100, worse than 88% of copper alloy grades
- Low strength — 124 MPa (18 ksi), worse than 78% of copper alloy grades
C84400 Continuous Cast properties
Typical room-temperature values for C84400 Continuous Cast; 20 are specific to this condition. Other listed values are C84400 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C84400 Continuous Cast has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 843°C (1,549 °F).
Mechanical13
C84400 Continuous Cast has a yield strength of 124 MPa (18 ksi) and a tensile strength of 248 MPa (36 ksi) — weaker than 78% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 95 GPa (13.8 Msi).
Thermal6
C84400 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
C84400 Continuous Cast conducts electricity at 16.4 % IACS, worse than 51% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 68% of copper alloy grades.
Sustainability4
Producing a kilogram of C84400 Continuous Cast takes about 42 MJ of energy and emits 3.2 kg of CO₂ — less than 99% of copper alloy grades. Typical recycled content is 85%.
Manufacturability8
C84400 Continuous Cast's machinability is excellent (90/100, better than 98% of copper alloy grades); weldability poor (20/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C84400 Continuous Cast
Is C84400 easy to machine?
Excellent free-machining behaviour (≈90 % of C36000) — lead gives short chips; use sharp positive-rake tools, high speed, light feed and flood coolant, and observe lead-dust/OSHA controls.
Can C84400 be welded?
Poor fusion weldability because of lead volatilisation and hot cracking; join by soft soldering (excellent) or silver brazing (fair-good), and repair porosity with brazing rather than TIG.
Can C84400 be formed, bent or molded?
Casting-only alloy: excellent sand, permanent-mould and continuous-cast fluidity with good pressure tightness; not suited to cold forming or hot working.
What surface finishes work on C84400?
Cannot be anodised; take mechanical polish, tin, nickel or chrome plating (tin plating common for water-service interiors), or chemical patina/lacquer for decorative parts.
C84400 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 |
|---|---|---|
| CuASTM B584 C84400 | 78 – 82 | 81 |
| Sn | 2.3 – 3.5 | 3 |
| Pbnot for lead-free potable-water service | 6 – 8 | 7 |
| Fe | ≤ 0.4 | — |
| Sb | ≤ 0.25 | — |
| Niincl. Co | ≤ 1 | — |
| S | ≤ 0.08 | — |
| P | ≤ 0.02 | — |
| Al | ≤ 0.01 | — |
| Si | ≤ 0.01 | — |
| Zn | ≥ 7 (balance) | — |
C84400 Continuous Cast — frequently asked
What is C84400 Continuous Cast used for?
C84400 Continuous Cast is typically used for bushings, bearings and pump impellers. In short: acid-proof bronze.
What is the yield strength of C84400 Continuous Cast?
C84400 Continuous Cast has a typical yield strength of 124 MPa (18 ksi) and a tensile strength of 248 MPa (36 ksi) — weaker than 78% of copper alloy grades. Strength varies by condition: see the 3 listed tempers.
Is C84400 Continuous Cast easy to machine?
Yes — machinability is rated excellent (90/100, better than 98% of copper alloy grades). Excellent free-machining behaviour (≈90 % of C36000) — lead gives short chips; use sharp positive-rake tools, high speed, light feed and flood coolant, and observe lead-dust/OSHA controls.
Can C84400 Continuous Cast be welded?
Not readily — weldability is rated poor (20/100). Poor fusion weldability because of lead volatilisation and hot cracking; join by soft soldering (excellent) or silver brazing (fair-good), and repair porosity with brazing rather than TIG.
What surface finishes work on C84400 Continuous Cast?
Cannot be anodised; take mechanical polish, tin, nickel or chrome plating (tin plating common for water-service interiors), or chemical patina/lacquer for decorative parts.
Can C84400 Continuous Cast be formed, bent or molded?
Casting-only alloy: excellent sand, permanent-mould and continuous-cast fluidity with good pressure tightness; not suited to cold forming or hot working.
What is the maximum service temperature of C84400 Continuous Cast?
C84400 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 C84400 Continuous Cast?
Yes — C84400 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 — Copper-Base Alloy Centrifugal Castings — ASTM International (2020)
- CDA Alloy Datasheet C84400 — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — 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.