Copper Alloy C60800-H55
Temper
UNS C60800
H55 = light-drawn tube
Light cold draw for straighter, slightly stronger tube where the ends will still be expanded.
Values for the H55 condition
Other C60800 tempers and conditions
C60800 is listed in 4 conditions; see the grade overview at C60800.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Choose when maximum softness for severe tube-end expansion, bending or U-bending is required. | 165 | 395 | 60 | 88 HB | 17 % IACS |
O61Default Annealed | Standard condition for ASTM B111 condenser/heat-exchanger tube — maximum ductility for expanding and rolling into tubesheets. | 186 | 415 | 55 | 100 HB | 17 % IACS |
H55This page Light-drawn tube | Light cold draw for straighter, slightly stronger tube where the ends will still be expanded. | 275 | 460 | 35 | 120 HB | 17 % IACS |
Hard drawn | Rarely stocked; used where higher strength and stiffness of the tube wall matter more than expandability. | 400 | 550 | 15 | 158 HB | 16.5 % IACS |
What is C60800-H55?
C60800-H55 is C60800 in the H55 temper — light cold draw for straighter, slightly stronger tube where the ends will still be expanded. C60800-H55 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 460 MPa (66.7 ksi) — stronger than 57% of copper alloy grades. Elongation at break is 35% and the elastic modulus is 117 GPa (17 Msi). C60800-H55 has a density of 8.17 g/cm³ (0.295 lb/in³), lighter than 86% of copper alloy grades. It melts at 1,035°C (1,895 °F). O61 is the default condition FabDigit quotes; H55 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 74/100, better than 88% of copper alloy grades
- Readily welded — 70/100, better than 85% of copper alloy grades
- Ductile — tolerates forming and impact — 35%, better than 80% of copper alloy grades
C60800-H55 properties
Typical room-temperature values for C60800-H55; 20 are specific to this condition. Other listed values are C60800 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C60800-H55 has a density of 8.17 g/cm³ (0.295 lb/in³), lighter than 86% of copper alloy grades. It melts at 1,035°C (1,895 °F).
Mechanical14
C60800-H55 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 460 MPa (66.7 ksi) — stronger than 57% of copper alloy grades. Elongation at break is 35% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C60800-H55 is rated for continuous service to 230°C (446 °F). It conducts heat at 82 W/m·K (47.4 BTU/hr·ft·°F), better than 50% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C60800-H55 conducts electricity at 17 % IACS, better than 50% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), better than 88% of copper alloy grades.
Sustainability4
Producing a kilogram of C60800-H55 takes about 57 MJ of energy and emits 3.6 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 25%.
Manufacturability7
C60800-H55's machinability is poor (32/100, worse than 57% of copper alloy grades); weldability very good (70/100); formability good (60/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C60800-H55
Is C60800 easy to machine?
Gummy, tough alpha bronze (≈20 % of free-cutting brass): use sharp positive-rake carbide tooling, slow feeds, generous coolant and expect long stringy chips.
Can C60800 be welded?
GTAW/GMAW with aluminum-bronze filler (ERCuAl-A2) works well under gas shielding; the tenacious alumina film must be removed, and oxyacetylene welding or soldering is not recommended.
Can C60800 be formed, bent or molded?
Annealed tube cold-forms, bends and expands readily; interanneal near 600–700 °C for heavy cold work and hot-work around 700–850 °C.
What surface finishes work on C60800?
Not anodizable; pickle in dilute sulfuric/nitric to strip alumina film, then polish, tin/nickel plate for solderability, or leave to develop a protective oxide in service.
C60800 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 |
|---|---|---|
| Al | 5 – 6.5 | 5.7 |
| Asinhibits dealuminification | 0.02 – 0.35 | 0.06 |
| Fe | ≤ 0.1 | — |
| Pb | ≤ 0.1 | — |
| Snnot intentionally added; trace only | ≤ 0 | — |
| Curemainder; 92.5 % min per ASTM B111/CDA | ≥ 92.5 (balance) | — |
C60800-H55 — frequently asked
What is C60800-H55 used for?
C60800-H55 is typically used for condenser tubing, heat exchanger tubes and marine piping. In short: tube-grade aluminum bronze; very high formability; poor machinability.
What is the yield strength of C60800-H55?
C60800-H55 has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 460 MPa (66.7 ksi) — stronger than 57% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C60800-H55 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 57% of copper alloy grades). Gummy, tough alpha bronze (≈20 % of free-cutting brass): use sharp positive-rake carbide tooling, slow feeds, generous coolant and expect long stringy chips.
Can C60800-H55 be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW with aluminum-bronze filler (ERCuAl-A2) works well under gas shielding; the tenacious alumina film must be removed, and oxyacetylene welding or soldering is not recommended.
What surface finishes work on C60800-H55?
Not anodizable; pickle in dilute sulfuric/nitric to strip alumina film, then polish, tin/nickel plate for solderability, or leave to develop a protective oxide in service.
Can C60800-H55 be formed, bent or molded?
Annealed tube cold-forms, bends and expands readily; interanneal near 600–700 °C for heavy cold work and hot-work around 700–850 °C.
What is the maximum service temperature of C60800-H55?
C60800-H55 is rated for continuous use to about 230°C (446 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C60800-O61 and C60800-H80?
O61 is the default condition — standard condition for ASTM B111 condenser/heat-exchanger tube — maximum ductility for expanding and rolling into tubesheets. H80: rarely stocked; used where higher strength and stiffness of the tube wall matter more than expandability. Yield strength is 186 MPa in O61 versus 400 MPa in H80.
Sources
- ASTM B111/B111M Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock — ASTM International (2021)
- CDA Alloy Datasheet C60800 (copper.org Standards & Properties) — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials (copper alloys in seawater) — 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.