Copper Alloy C84100-M07
Heat-treated state
UNS C84100
M07 = as continuous cast
Continuous-cast bar and tube stock for screw-machined fittings and bushings; best soundness and most uniform machining.
Values for the M07 condition
Other C84100 tempers and conditions
C84100 is listed in 4 conditions; see the grade overview at C84100.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard as-cast sand foundry condition for valve bodies, fittings and general plumbing hardware. | 90 | 207 | 26 | 52 HB | 16.5 % IACS |
As plaster cast | Permanent-mold production of repeat plumbing hardware where tighter tolerances and slightly higher strength than sand casting are wanted. | 97 | 221 | 24 | 55 HB | 16.5 % IACS |
As centrifugally cast | Choose for rings, bushings and hollow sections where denser, finer-grained metal and higher soundness are needed. | 100 | 228 | 28 | 55 HB | 16.5 % IACS |
M07This page As continuous cast | Continuous-cast bar and tube stock for screw-machined fittings and bushings; best soundness and most uniform machining. | 110 | 234 | 25 | 58 HB | 16.5 % IACS |
What is C84100-M07?
C84100-M07 is C84100 heat treated to M07 — continuous-cast bar and tube stock for screw-machined fittings and bushings; best soundness and most uniform machining. C84100-M07 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 234 MPa (33.9 ksi) — weaker than 82% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 90 GPa (13.1 Msi). C84100-M07 has a density of 8.6 g/cm³ (0.311 lb/in³), lighter than 59% of copper alloy grades. It melts at 855°C (1,571 °F). M01 is the default condition FabDigit quotes; M07 is available on request or by drawing note.
Advantages
- Low embodied carbon — 3 kg CO₂/kg, better than 97% of copper alloy grades
- 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
- Hard to polish — 60/100, worse than 92% 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
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
C84100-M07 properties
Typical room-temperature values for C84100-M07; 18 are specific to this condition. Other listed values are C84100 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C84100-M07 has a density of 8.6 g/cm³ (0.311 lb/in³), lighter than 59% of copper alloy grades. It melts at 855°C (1,571 °F).
Mechanical12
C84100-M07 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 234 MPa (33.9 ksi) — weaker than 82% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 90 GPa (13.1 Msi).
Thermal6
C84100-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 20.7 µm/m·K (11.5 µin/in·°F).
Electrical3
C84100-M07 conducts electricity at 16.5 % IACS, worse than 51% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C84100-M07 takes about 45 MJ of energy and emits 3 kg of CO₂ — less than 97% of copper alloy grades. Typical recycled content is 85%.
Manufacturability8
C84100-M07's machinability is excellent (85/100, better than 93% 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 C84100-M07
Is C84100 easy to machine?
Free-machining thanks to ~5% Pb; use sharp positive-rake tooling, high speeds, light feeds and flood coolant — rating ≈80% of AISI 1212.
Can C84100 be welded?
Fusion welding is poor (lead causes hot cracking); join by soft soldering or silver brazing with flux, and avoid overheating that volatilizes zinc.
Can C84100 be formed, bent or molded?
Casting alloy only — excellent sand/permanent-mold/continuous-cast behaviour with good pressure tightness; keep pouring ~1050–1120 °C and use good gating to avoid shrinkage porosity.
What surface finishes work on C84100?
Takes chromate/BTA passivation, nickel-chrome, tin or lacquer well; polishes to a moderate luster but lead smear and micro-porosity limit mirror finishes.
C84100 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 |
|---|---|---|
| Cusemi-red brass copper range | 79 – 83 | 81 |
| Sn | 2 – 4 | 3 |
| Pbfree-machining / pressure-tightness addition; not low-lead compliant | 4 – 6 | 5 |
| Feimpurity limit | ≤ 0.4 | — |
| Niincl. Co | ≤ 1 | — |
| Sb | ≤ 0.25 | — |
| S | ≤ 0.08 | — |
| P | ≤ 0.02 | — |
| Al | ≤ 0.01 | — |
| Si | ≤ 0.01 | — |
| Zn | ≥ 12 (balance) | — |
C84100-M07 — frequently asked
What is C84100-M07 used for?
C84100-M07 is typically used for plumbing fittings, hardware castings and valve bodies. In short: free-machining leaded casting; lower strength than C83600; good pressure tightness.
What is the yield strength of C84100-M07?
C84100-M07 has a typical yield strength of 110 MPa (16 ksi) and a tensile strength of 234 MPa (33.9 ksi) — weaker than 82% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C84100-M07 easy to machine?
Yes — machinability is rated excellent (85/100, better than 93% of copper alloy grades). Free-machining thanks to ~5% Pb; use sharp positive-rake tooling, high speeds, light feeds and flood coolant — rating ≈80% of AISI 1212.
Can C84100-M07 be welded?
Not readily — weldability is rated poor (25/100). Fusion welding is poor (lead causes hot cracking); join by soft soldering or silver brazing with flux, and avoid overheating that volatilizes zinc.
What surface finishes work on C84100-M07?
Takes chromate/BTA passivation, nickel-chrome, tin or lacquer well; polishes to a moderate luster but lead smear and micro-porosity limit mirror finishes.
Can C84100-M07 be formed, bent or molded?
Casting alloy only — excellent sand/permanent-mold/continuous-cast behaviour with good pressure tightness; keep pouring ~1050–1120 °C and use good gating to avoid shrinkage porosity.
What is the maximum service temperature of C84100-M07?
C84100-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 C84100-M01 and C84100-M07?
M01 is the default condition — standard as-cast sand foundry condition for valve bodies, fittings and general plumbing hardware. M07: continuous-cast bar and tube stock for screw-machined fittings and bushings; best soundness and most uniform machining. Yield strength is 90 MPa in M01 versus 110 MPa in M07.
Sources
- ASTM B584 — Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- ASTM B601 — Temper Designations for Copper and Copper Alloys — ASTM International (2019)
- CDA UNS alloy datasheets (semi-red brass C841xx family) — 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.