Copper Alloy C89836 M04-Centrifugal
Finish state
UNS C89836
M04-Centrifugal = centrifugal Cast
For rings, bushings and large-bore sleeves where soundness and pressure tightness matter.
Values for the M04-Centrifugal condition
What is C89836 M04-Centrifugal?
C89836 M04-Centrifugal is C89836 supplied in the M04-Centrifugal condition — for rings, bushings and large-bore sleeves where soundness and pressure tightness matter. C89836 M04-Centrifugal has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 96 GPa (13.9 Msi). C89836 M04-Centrifugal has a density of 8.6 g/cm³ (0.311 lb/in³), lighter than 59% of copper alloy grades. It melts at 854°C (1,569 °F).
Advantages
- Low embodied carbon — 3.2 kg CO₂/kg, better than 92% of copper alloy grades
- Easy to machine — 82/100, better than 90% of copper alloy grades
Limitations
- Low stiffness — 96 GPa (13.9 Msi), worse than 91% of copper alloy grades
- Hard to polish — 65/100, worse than 87% of copper alloy grades
- Limited formability — 15/100, worse than 79% of copper alloy grades
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
- Low strength — 130 MPa (18.9 ksi), worse than 77% of copper alloy grades
C89836 M04-Centrifugal properties
Typical room-temperature values for C89836 M04-Centrifugal; 4 are specific to this condition. Other listed values are C89836 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C89836 M04-Centrifugal has a density of 8.6 g/cm³ (0.311 lb/in³), lighter than 59% of copper alloy grades. It melts at 854°C (1,569 °F).
Mechanical13
C89836 M04-Centrifugal has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 96 GPa (13.9 Msi).
Thermal6
C89836 M04-Centrifugal 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
C89836 M04-Centrifugal conducts electricity at 15 % IACS, worse than 54% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (68/100), better than 69% of copper alloy grades.
Sustainability4
Producing a kilogram of C89836 M04-Centrifugal takes about 45 MJ of energy and emits 3.2 kg of CO₂ — less than 97% of copper alloy grades. Typical recycled content is 70%.
Manufacturability7
C89836 M04-Centrifugal's machinability is very good (82/100, better than 90% of copper alloy grades); weldability poor (25/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C89836 M04-Centrifugal
Is C89836 easy to machine?
Machines much like leaded red brass — bismuth breaks chips; use sharp positive-rake carbide or HSS, 150–300 m/min, light-duty soluble oil, and expect ~85 % of free-cutting brass rates.
Can C89836 be welded?
Fusion welding is not recommended (bismuth causes hot/grain-boundary cracking); join by soft soldering or silver brazing, or mechanically.
Can C89836 be formed, bent or molded?
Foundry alloy only: wide freezing range demands generous risering, chills and directional solidification to avoid dispersed microporosity; no cold forming.
What surface finishes work on C89836?
Takes tin, nickel and chrome plating well after proper cleaning; polishes to a satin bronze luster; passivation/flushing per NSF 61 before potable-water use.
C89836 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 |
|---|---|---|
| Sn | 3 – 5 | 4 |
| Bilead substitute; provides chip breaking and pressure tightness | 1.7 – 2.7 | 2.2 |
| Zn | 6 – 10 | 7.5 |
| Pblow-lead limit for NSF/ANSI 372 potable-water service | ≤ 0.09 | |
| Niincidental | ≤ 1 | |
| Fe | ≤ 0.3 | |
| Sb | ≤ 0.25 | |
| S | ≤ 0.08 | |
| P | ≤ 0.05 | |
| Al | ≤ 0.01 | |
| Si | ≤ 0.01 | |
| Cubalance; ranges are approximate per ASTM B584/B505 bismuth-bronze listing — verify against current standard | ≥ 84 (balance) |
C89836 M04-Centrifugal — frequently asked
What is C89836 M04-Centrifugal used for?
C89836 M04-Centrifugal is typically used for potable water valves, plumbing fittings and meter bodies. In short: lead-free potable-water bronze; bismuth replaces lead; good as-cast machinability.
What is the yield strength of C89836 M04-Centrifugal?
C89836 M04-Centrifugal has a typical yield strength of 130 MPa (18.9 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 77% of copper alloy grades.
Is C89836 M04-Centrifugal easy to machine?
Yes — machinability is rated very good (82/100, better than 90% of copper alloy grades). Machines much like leaded red brass — bismuth breaks chips; use sharp positive-rake carbide or HSS, 150–300 m/min, light-duty soluble oil, and expect ~85 % of free-cutting brass rates.
Can C89836 M04-Centrifugal be welded?
Not readily — weldability is rated poor (25/100). Fusion welding is not recommended (bismuth causes hot/grain-boundary cracking); join by soft soldering or silver brazing, or mechanically.
What surface finishes work on C89836 M04-Centrifugal?
Takes tin, nickel and chrome plating well after proper cleaning; polishes to a satin bronze luster; passivation/flushing per NSF 61 before potable-water use.
Can C89836 M04-Centrifugal be formed, bent or molded?
Foundry alloy only: wide freezing range demands generous risering, chills and directional solidification to avoid dispersed microporosity; no cold forming.
What is the maximum service temperature of C89836 M04-Centrifugal?
C89836 M04-Centrifugal 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.
Sources
- ASTM B584 – Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B505/B505M – Copper Alloy Continuous Castings — ASTM International (2018)
- CDA Standard Designation / Alloy Data for C898xx bismuth bronzes — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 – Properties and Selection: Nonferrous Alloys — ASM International (1990)
- NSF/ANSI 61 & NSF/ANSI 372 – Drinking Water System Components / Lead Content — NSF International (2023)
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.