Copper Alloy C55282 AS-BRAZED
Heat-treated state
UNS C55282
Reference condition for joint design values in Cu-Cu lap joints after brazing at 700–815 °C.
Values for the AS-BRAZED condition
What is C55282 AS-BRAZED?
C55282 AS-BRAZED is C55282 heat treated to AS-BRAZED — reference condition for joint design values in Cu-Cu lap joints after brazing at 700–815 °C. C55282 AS-BRAZED has a tensile strength of 250 MPa (36.3 ksi), weaker than 81% of copper alloy grades. Elongation at break is 3% and the elastic modulus is 100 GPa (14.5 Msi). C55282 AS-BRAZED has a density of 8.2 g/cm³ (0.296 lb/in³), lighter than 85% of copper alloy grades. It melts at 645°C (1,193 °F).
Limitations
- High embodied carbon — 14 kg CO₂/kg, worse than 100% of copper alloy grades
- Hard to polish — 50/100, worse than 99% of copper alloy grades
- Difficult to weld — 10/100, worse than 98% of copper alloy grades
- Limited ductility — 3%, worse than 97% of copper alloy grades
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
C55282 AS-BRAZED properties
Typical room-temperature values for C55282 AS-BRAZED; 3 are specific to this condition. Other listed values are C55282 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C55282 AS-BRAZED has a density of 8.2 g/cm³ (0.296 lb/in³), lighter than 85% of copper alloy grades. It melts at 645°C (1,193 °F).
Mechanical7
C55282 AS-BRAZED has a tensile strength of 250 MPa (36.3 ksi), weaker than 81% of copper alloy grades. Elongation at break is 3% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
C55282 AS-BRAZED is rated for continuous service to 150°C (302 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), worse than 66% of copper alloy grades. Thermal expansion is 17.5 µm/m·K (9.72 µin/in·°F).
Electrical3
C55282 AS-BRAZED conducts electricity at 10 % IACS, worse than 74% of copper alloy grades.
Chemical & Environmental2
Corrosion resistance is good (55/100), worse than 86% of copper alloy grades.
Sustainability4
Producing a kilogram of C55282 AS-BRAZED takes about 125 MJ of energy and emits 14 kg of CO₂ — more than 98% of copper alloy grades. Typical recycled content is 25%.
Manufacturability6
C55282 AS-BRAZED's machinability is poor (25/100, worse than 86% of copper alloy grades); weldability not recommended (10/100); formability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C55282 AS-BRAZED
Is C55282 easy to machine?
Not a structural machining alloy; the Cu-P eutectic phase makes it hard and brittle, so cut preforms by shearing/stamping rather than turning.
Can C55282 be welded?
Used as a filler, not welded — never apply to steel, cast iron or nickel alloys, where brittle iron/nickel phosphides form.
Can C55282 be formed, bent or molded?
Limited cold ductility: drawn to rod/wire and rolled to thin strip in the mill, but avoid tight field bending of rods.
What surface finishes work on C55282?
Joints self-flux on copper and need only light cleaning; residues from fluxed brass/bronze joints must be washed off to prevent corrosion.
C55282 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 |
|---|---|---|
| Ag | 4.8 – 5.2 | 5 |
| P | 6.5 – 7 | 6.8 |
| Other (total)total of all other elements per AWS A5.8 | ≤ 0.15 | |
| Cu | balance |
C55282 AS-BRAZED — frequently asked
What is C55282 AS-BRAZED used for?
C55282 AS-BRAZED is typically used for close-tolerance copper tube joints, refrigeration systems and electronic component brazing. In short: lowest brazing temperature phos-copper; narrow melting range; suited to capillary-gap joints.
What is the tensile strength of C55282 AS-BRAZED?
C55282 AS-BRAZED has a typical tensile strength of 250 MPa (36.3 ksi) — weaker than 81% of copper alloy grades.
Is C55282 AS-BRAZED easy to machine?
Not especially — machinability is rated poor (25/100, worse than 86% of copper alloy grades). Not a structural machining alloy; the Cu-P eutectic phase makes it hard and brittle, so cut preforms by shearing/stamping rather than turning.
Can C55282 AS-BRAZED be welded?
Not readily — weldability is rated not recommended (10/100). Used as a filler, not welded — never apply to steel, cast iron or nickel alloys, where brittle iron/nickel phosphides form.
What surface finishes work on C55282 AS-BRAZED?
Joints self-flux on copper and need only light cleaning; residues from fluxed brass/bronze joints must be washed off to prevent corrosion.
Can C55282 AS-BRAZED be formed, bent or molded?
Limited cold ductility: drawn to rod/wire and rolled to thin strip in the mill, but avoid tight field bending of rods.
What is the maximum service temperature of C55282 AS-BRAZED?
C55282 AS-BRAZED is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- AWS A5.8M/A5.8 Specification for Filler Metals for Brazing and Braze Welding — American Welding Society (2019)
- ASM Handbook Vol. 6, Welding, Brazing and Soldering — ASM International (1993)
- Copper Alloy UNS C55282 data — Copper Development Association (copper.org) (2023)
- GB/T 6418 (2008)
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.