Copper Alloy C84500-M02
Heat-treated state
UNS C84500 · ASTM B584
M02 = as centrifugally cast
Pick for cylindrical parts (bushings, rings, flanges) needing denser, slightly stronger structure than sand casting.
Values for the M02 condition
Other C84500 tempers and conditions
C84500 is listed in 5 conditions; see the grade overview at C84500.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard commercial condition for ASTM B584 valve bodies, fittings and general hardware castings. | 103 | 241 | 28 | 55 HB | 16 % IACS |
As investment cast | Choose for small, intricate near-net-shape hardware and decorative parts with minimal machining allowance. | 103 | 241 | 25 | 55 HB | 16 % IACS |
M02This page As centrifugally cast | Pick for cylindrical parts (bushings, rings, flanges) needing denser, slightly stronger structure than sand casting. | 110 | 248 | 25 | 58 HB | 16 % IACS |
As plaster cast | Use for medium-to-high volume fittings where finer grain, tighter tolerance and better pressure tightness are wanted. | 117 | 255 | 20 | 60 HB | 16 % IACS |
As continuous cast | Best choice for machined-from-bar/tube parts: sound, low-porosity stock with the highest as-cast strength of this alloy. | 124 | 262 | 22 | 60 HB | 16 % IACS |
What is C84500-M02?
C84500-M02 is C84500 heat treated to M02 — pick for cylindrical parts (bushings, rings, flanges) needing denser, slightly stronger structure than sand casting. C84500-M02 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 248 MPa (36 ksi) — weaker than 82% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 90 GPa (13.1 Msi). C84500-M02 has a density of 8.58 g/cm³ (0.31 lb/in³), lighter than 60% of copper alloy grades. It melts at 843°C (1,549 °F). M01 is the default condition FabDigit quotes; M02 is available on request or by drawing note.
Advantages
- Easy to machine — 85/100, better than 93% of copper alloy grades
Limitations
- Low stiffness — 90 GPa (13.1 Msi), worse than 95% of copper alloy grades
- Difficult to weld — 20/100, worse than 88% of copper alloy grades
- Hard to polish — 65/100, worse than 87% of copper alloy grades
- Low strength — 110 MPa (16 ksi), worse than 82% of copper alloy grades
- Limited formability — 15/100, worse than 79% of copper alloy grades
C84500-M02 properties
Typical room-temperature values for C84500-M02; 19 are specific to this condition. Other listed values are C84500 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C84500-M02 has a density of 8.58 g/cm³ (0.31 lb/in³), lighter than 60% of copper alloy grades. It melts at 843°C (1,549 °F).
Mechanical13
C84500-M02 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 248 MPa (36 ksi) — weaker than 82% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 90 GPa (13.1 Msi).
Thermal6
C84500-M02 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 20.3 µm/m·K (11.3 µin/in·°F).
Electrical3
C84500-M02 conducts electricity at 16 % IACS, worse than 52% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C84500-M02 takes about 52 MJ of energy and emits 3.6 kg of CO₂ — less than 87% of copper alloy grades. Typical recycled content is 85%.
Manufacturability8
C84500-M02's machinability is excellent (85/100, better than 93% of copper alloy grades); weldability poor (20/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C84500-M02
Is C84500 easy to machine?
Free-machining at ~80 % of C36000; use sharp positive-rake tools, light feeds and flood coolant, chips break short thanks to the lead phase.
Can C84500 be welded?
Not recommended for fusion welding (lead causes hot cracking and porosity); join by soft soldering or silver brazing with low-temperature filler.
Can C84500 be formed, bent or molded?
Foundry alloy only — pours easily in sand, permanent mold, centrifugal and continuous casting with good pressure tightness; not cold-formable.
What surface finishes work on C84500?
Takes bright nickel/chrome plating, tin plating for potable-water parts, chemical patina or clear lacquer; polish with non-embedding compounds to avoid lead smear.
C84500 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 | 73 – 77 | 75 |
| Sn | 2 – 3 | 2.5 |
| Pbfree-machining phase | 6 – 7.5 | 7 |
| Fe | ≤ 0.4 | — |
| Niincl. Co, max | ≤ 1 | — |
| Sb | ≤ 0.25 | — |
| S | ≤ 0.08 | — |
| P | ≤ 0.02 | — |
| Al | ≤ 0.01 | — |
| Si | ≤ 0.01 | — |
| Zn | ≥ 13 (balance) | — |
C84500-M02 — frequently asked
What is C84500-M02 used for?
C84500-M02 is typically used for plumbing fittings, hardware castings and small pump bodies. In short: pressure-tight leaded brass; free-machining cast copper alloy; mid-strength plumbing casting.
What is the yield strength of C84500-M02?
C84500-M02 has a typical yield strength of 110 MPa (16 ksi) and a tensile strength of 248 MPa (36 ksi) — weaker than 82% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C84500-M02 easy to machine?
Yes — machinability is rated excellent (85/100, better than 93% of copper alloy grades). Free-machining at ~80 % of C36000; use sharp positive-rake tools, light feeds and flood coolant, chips break short thanks to the lead phase.
Can C84500-M02 be welded?
Not readily — weldability is rated poor (20/100). Not recommended for fusion welding (lead causes hot cracking and porosity); join by soft soldering or silver brazing with low-temperature filler.
What surface finishes work on C84500-M02?
Takes bright nickel/chrome plating, tin plating for potable-water parts, chemical patina or clear lacquer; polish with non-embedding compounds to avoid lead smear.
Can C84500-M02 be formed, bent or molded?
Foundry alloy only — pours easily in sand, permanent mold, centrifugal and continuous casting with good pressure tightness; not cold-formable.
What is the maximum service temperature of C84500-M02?
C84500-M02 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.
What is the difference between C84500-M01 and C84500-M07?
M01 is the default condition — standard commercial condition for ASTM B584 valve bodies, fittings and general hardware castings. M07: best choice for machined-from-bar/tube parts: sound, low-porosity stock with the highest as-cast strength of this alloy. Yield strength is 103 MPa in M01 versus 124 MPa in M07.
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)
- ASTM B271 — Copper-Base Alloy Centrifugal Castings — ASTM International (2020)
- CDA Standard Designation C84500 alloy datasheet — 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.