Copper Alloy C84500-M07
Heat-treated state
UNS C84500 · ASTM B584
M07 = as continuous cast
Best choice for machined-from-bar/tube parts: sound, low-porosity stock with the highest as-cast strength of this alloy.
Values for the M07 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 |
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 |
M07This page 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-M07?
C84500-M07 is C84500 heat treated to M07 — best choice for machined-from-bar/tube parts: sound, low-porosity stock with the highest as-cast strength of this alloy. C84500-M07 has a yield strength of 124 MPa (18 ksi) and a tensile strength of 262 MPa (38 ksi) — weaker than 78% of copper alloy grades. Elongation at break is 22% and the elastic modulus is 90 GPa (13.1 Msi). C84500-M07 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; M07 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
- Limited formability — 15/100, worse than 79% of copper alloy grades
- Low strength — 124 MPa (18 ksi), worse than 78% of copper alloy grades
C84500-M07 properties
Typical room-temperature values for C84500-M07; 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-M07 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-M07 has a yield strength of 124 MPa (18 ksi) and a tensile strength of 262 MPa (38 ksi) — weaker than 78% of copper alloy grades. Elongation at break is 22% and the elastic modulus is 90 GPa (13.1 Msi).
Thermal6
C84500-M07 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-M07 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-M07 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-M07'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-M07
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-M07 — frequently asked
What is C84500-M07 used for?
C84500-M07 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-M07?
C84500-M07 has a typical yield strength of 124 MPa (18 ksi) and a tensile strength of 262 MPa (38 ksi) — weaker than 78% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C84500-M07 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-M07 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-M07?
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-M07 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-M07?
C84500-M07 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.