Copper Alloy C92400-M04
Finish state
UNS C92400
M04 = as pressure die cast
Use for repeat-production small fittings where faster solidification raises strength and improves surface finish.
Values for the M04 condition
Other C92400 tempers and conditions
C92400 is listed in 4 conditions; see the grade overview at C92400.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard ASTM B584 sand casting condition for valve bodies, flanges and fittings needing pressure tightness. | 150 | 295 | 18 | 80 HB | 12 % IACS |
As centrifugally cast | Pick for rings, sleeves and hollow cylinders where centrifugal casting gives denser, cleaner metal than sand casting. | 165 | 310 | 16 | 82 HB | 12 % IACS |
M04This page As pressure die cast | Use for repeat-production small fittings where faster solidification raises strength and improves surface finish. | 165 | 310 | 14 | 85 HB | 12 % IACS |
As continuous cast | Stock form for bar, tube and hollow bushings machined from continuous-cast bronze (ASTM B505), with the highest strength and best soundness. | 172 | 325 | 14 | 85 HB | 12 % IACS |
What is C92400-M04?
C92400-M04 is C92400 supplied in the M04 condition — use for repeat-production small fittings where faster solidification raises strength and improves surface finish. C92400-M04 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 64% of copper alloy grades. Elongation at break is 14% and the elastic modulus is 103 GPa (14.9 Msi). C92400-M04 has a density of 8.83 g/cm³ (0.319 lb/in³), heavier than 65% of copper alloy grades. It melts at 854°C (1,569 °F). M01 is the default condition FabDigit quotes; M04 is available on request or by drawing note.
Advantages
- Easy to machine — 75/100, better than 80% of copper alloy grades
Limitations
- Hard to polish — 60/100, worse than 92% of copper alloy grades
- Difficult to weld — 20/100, worse than 88% of copper alloy grades
- Limited formability — 14/100, worse than 84% of copper alloy grades
- High embodied carbon — 4.6 kg CO₂/kg, worse than 82% of copper alloy grades
C92400-M04 properties
Typical room-temperature values for C92400-M04; 21 are specific to this condition. Other listed values are C92400 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C92400-M04 has a density of 8.83 g/cm³ (0.319 lb/in³), heavier than 65% of copper alloy grades. It melts at 854°C (1,569 °F).
Mechanical15
C92400-M04 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 64% of copper alloy grades. Elongation at break is 14% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C92400-M04 is rated for continuous service to 250°C (482 °F). It conducts heat at 47 W/m·K (27.2 BTU/hr·ft·°F), worse than 69% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C92400-M04 conducts electricity at 12 % IACS, worse than 62% 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 C92400-M04 takes about 65 MJ of energy and emits 4.6 kg of CO₂ — more than 81% of copper alloy grades. Typical recycled content is 75%.
Manufacturability8
C92400-M04's machinability is very good (75/100, better than 80% of copper alloy grades); weldability poor (20/100); formability not recommended (14/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C92400-M04
Is C92400 easy to machine?
Free-machining with the lead phase — use sharp positive-rake carbide or HSS tools, high speed, light feed, and expect short chips and good surface finish.
Can C92400 be welded?
Poor fusion weldability due to lead and tin hot-shortness; repair by brazing or by low-heat gas/TIG with matching tin-bronze filler and preheat, or by soldering.
Can C92400 be formed, bent or molded?
Casting alloy only — good fluidity and dross-free pouring around 1120–1180 °C; rely on directional solidification and risering to control interdendritic shrinkage; not cold formable.
What surface finishes work on C92400?
Takes tin, nickel or chrome plating well and solders easily; chemical patination/lacquer for decorative parts; anodizing not applicable.
C92400 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 | 9 – 11 | 10 |
| Pb | 1 – 3 | 2 |
| Zn | 1 – 3 | 2 |
| Niincl. Co | ≤ 1 | — |
| Fe | ≤ 0.25 | — |
| Sb | ≤ 0.25 | — |
| P | ≤ 0.05 | — |
| S | ≤ 0.05 | — |
| Al | ≤ 0.01 | — |
| Si | ≤ 0.01 | — |
| Cu | ≥ 86 (balance) | — |
C92400-M04 — frequently asked
What is C92400-M04 used for?
C92400-M04 is typically used for valve bodies, pipe fittings and pump castings. In short: free-machining cast bronze; pressure-tight valve alloy; solders and plates easily.
What is the yield strength of C92400-M04?
C92400-M04 has a typical yield strength of 165 MPa (23.9 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 64% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C92400-M04 easy to machine?
Yes — machinability is rated very good (75/100, better than 80% of copper alloy grades). Free-machining with the lead phase — use sharp positive-rake carbide or HSS tools, high speed, light feed, and expect short chips and good surface finish.
Can C92400-M04 be welded?
Not readily — weldability is rated poor (20/100). Poor fusion weldability due to lead and tin hot-shortness; repair by brazing or by low-heat gas/TIG with matching tin-bronze filler and preheat, or by soldering.
What surface finishes work on C92400-M04?
Takes tin, nickel or chrome plating well and solders easily; chemical patination/lacquer for decorative parts; anodizing not applicable.
Can C92400-M04 be formed, bent or molded?
Casting alloy only — good fluidity and dross-free pouring around 1120–1180 °C; rely on directional solidification and risering to control interdendritic shrinkage; not cold formable.
What is the maximum service temperature of C92400-M04?
C92400-M04 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C92400-M01 and C92400-M07?
M01 is the default condition — standard ASTM B584 sand casting condition for valve bodies, flanges and fittings needing pressure tightness. M07: stock form for bar, tube and hollow bushings machined from continuous-cast bronze (ASTM B505), with the highest strength and best soundness. Yield strength is 150 MPa in M01 versus 172 MPa in M07.
Sources
- ASTM B584 Standard Specification for Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B505/B505M Standard Specification for Copper Alloy Continuous Castings — ASTM International (2018)
- CDA Standard Designation C92400 alloy datasheet — Copper Development Association (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.