Copper Alloy C97400 M03-Centrifugal
Finish state
UNS C97400
M03-Centrifugal = m03/M04 Centrifugal / Static Mold Cast
Choose for pressure-tight bushings, rings and sleeves where a finer, denser structure is needed.
Values for the M03-Centrifugal condition
Other C97400 tempers and conditions
C97400 is listed in 2 conditions; see the grade overview at C97400.
- TQ50-StressRelieved
- M03-Centrifugal
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress-relief annealed casting | Use when close machining tolerances or SCC-sensitive service require residual stresses to be removed. | 110 | 235 | 22 | 65 HB | 6.2 % IACS |
M03-CentrifugalThis page M03/M04 Centrifugal / Static Mold Cast | Choose for pressure-tight bushings, rings and sleeves where a finer, denser structure is needed. | 130 | 260 | 18 | 75 HB | 6 % IACS |
What is C97400 M03-Centrifugal?
C97400 M03-Centrifugal is C97400 supplied in the M03-Centrifugal condition — choose for pressure-tight bushings, rings and sleeves where a finer, denser structure is needed. C97400 M03-Centrifugal has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 260 MPa (37.7 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 124 GPa (18 Msi). C97400 M03-Centrifugal has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 77% of copper alloy grades. It melts at 1,010°C (1,850 °F).
Advantages
- Easy to machine — 72/100, better than 79% of copper alloy grades
Limitations
- Low electrical conductivity — 6 % IACS, worse than 93% of copper alloy grades
- Poor heat conductor — 30 W/m·K (17.3 BTU/hr·ft·°F), worse than 91% of copper alloy grades
- High embodied carbon — 5 kg CO₂/kg, worse than 86% 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
C97400 M03-Centrifugal properties
Typical room-temperature values for C97400 M03-Centrifugal; 21 are specific to this condition. Other listed values are C97400 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C97400 M03-Centrifugal has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 77% of copper alloy grades. It melts at 1,010°C (1,850 °F).
Mechanical12
C97400 M03-Centrifugal has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 260 MPa (37.7 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 124 GPa (18 Msi).
Thermal6
C97400 M03-Centrifugal is rated for continuous service to 230°C (446 °F). It conducts heat at 30 W/m·K (17.3 BTU/hr·ft·°F), worse than 91% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C97400 M03-Centrifugal conducts electricity at 6 % IACS, worse than 93% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), better than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C97400 M03-Centrifugal takes about 70 MJ of energy and emits 5 kg of CO₂ — more than 84% of copper alloy grades. Typical recycled content is 60%.
Manufacturability8
C97400 M03-Centrifugal's machinability is very good (72/100, better than 79% of copper alloy grades); weldability poor (25/100); formability poor (18/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C97400 M03-Centrifugal
Is C97400 easy to machine?
Free-machining thanks to ~5 % Pb — rating about 70 % of free-cutting brass; use sharp positive-rake carbide, light feeds and good chip breaking.
Can C97400 be welded?
Fusion welding is not recommended (lead causes hot cracking and porosity); repair by brazing or soft soldering, or use mechanical joints.
Can C97400 be formed, bent or molded?
Casting alloy only: wide freezing range needs generous risering, chills and clean melt practice; degas and avoid Al/Si pickup to prevent dross and hard spots.
What surface finishes work on C97400?
Polishes to a bright silver-white color; accepts nickel, chrome or silver plating and chemical patination — do not anodize.
C97400 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 | 58 – 61 | 59.5 |
| NiNi + Co | 15.5 – 17 | 16.2 |
| Sn | 2.5 – 3.5 | 3 |
| Pbfree-machining addition | 4.5 – 5.5 | 5 |
| Fe | ≤ 1.5 | 0.5 |
| Mn | ≤ 0.5 | 0.2 |
| Sb | ≤ 0.15 | — |
| P | ≤ 0.05 | — |
| S | ≤ 0.08 | — |
| Si | ≤ 0.15 | — |
| Al | ≤ 0.01 | — |
| Znremainder, typically 13–17 % | balance | — |
C97400 M03-Centrifugal — frequently asked
What is C97400 M03-Centrifugal used for?
C97400 M03-Centrifugal is typically used for valve bodies and trim, marine hardware, decorative castings and sanitary fittings. In short: higher-nickel leaded nickel silver; free-machining cast trim alloy; not fusion weldable.
What is the yield strength of C97400 M03-Centrifugal?
C97400 M03-Centrifugal has a typical yield strength of 130 MPa (18.9 ksi) and a tensile strength of 260 MPa (37.7 ksi) — weaker than 77% of copper alloy grades. Strength varies by condition: see the 2 listed tempers.
Is C97400 M03-Centrifugal easy to machine?
Yes — machinability is rated very good (72/100, better than 79% of copper alloy grades). Free-machining thanks to ~5 % Pb — rating about 70 % of free-cutting brass; use sharp positive-rake carbide, light feeds and good chip breaking.
Can C97400 M03-Centrifugal be welded?
Not readily — weldability is rated poor (25/100). Fusion welding is not recommended (lead causes hot cracking and porosity); repair by brazing or soft soldering, or use mechanical joints.
What surface finishes work on C97400 M03-Centrifugal?
Polishes to a bright silver-white color; accepts nickel, chrome or silver plating and chemical patination — do not anodize.
Can C97400 M03-Centrifugal be formed, bent or molded?
Casting alloy only: wide freezing range needs generous risering, chills and clean melt practice; degas and avoid Al/Si pickup to prevent dross and hard spots.
What is the maximum service temperature of C97400 M03-Centrifugal?
C97400 M03-Centrifugal is rated for continuous use to about 230°C (446 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASTM B584 — Standard Specification for Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- Copper Alloy C97400 alloy datasheet (Standards & Properties) — Copper Development Association (copper.org) (2024)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
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.