Straight lines.
Efficient heat transfer.
C12200 Straight Copper Tube combines high thermal conductivity, dependable joining performance and good formability in a clean, straight-length format. Its seamless circular section suits fluid circuits, heat-transfer equipment and fabricated copper assemblies.
Specify the outside diameter, wall thickness, temper and application standard. We can coordinate tube supply, cut lengths, end preparation, inspection and export packaging around your drawing.
The copper grade built for joining.
C12200 is a commercially pure copper containing a controlled residual amount of phosphorus. Deoxidation improves resistance to hydrogen embrittlement during heating, making the material well suited to brazed and soldered tube assemblies.
Cu-DHP / CW024A is the commonly corresponding European material designation. The ordered specification governs equivalence, dimensions and acceptance requirements.
Chemical composition
| Constituent | Mass fraction | Material function |
|---|---|---|
| Copper + silver (Cu + Ag) | 99.90% minimum | Conductive copper matrix; silver is included in the copper total. |
| Phosphorus (P) | 0.015–0.040% | Residual deoxidizer; improves suitability for thermal joining while reducing electrical conductivity compared with ETP copper. |
| Other residual elements | Controlled by the ordered specification | Individual Fe, Pb, Zn or oxygen limits are not implied by the two composition values above. Batch chemistry is checked against the purchase specification. |
Request material test documentation identifying the heat or lot and the applicable chemical requirements. C12200 is not an oxygen-free electronic copper grade.
Choose rigidity or formability.
Cold drawing raises strength and stiffness in handling; annealing restores ductility. Straight tubes are commonly supplied half-hard or hard. Annealed straight lengths can be discussed where subsequent forming is important. Temper availability depends on diameter, wall and the chosen tube standard.
| EN 1057 temper benchmark | Tensile strength Rm | Elongation at fracture | Selection priority |
|---|---|---|---|
| R220 · annealed | 220 MPa minimum | 40% minimum | High ductility for forming; soft condition must be protected against handling deformation. |
| R250 · half-hard | 250 MPa minimum | 20% or 30% minimum, depending on dimensions | Balance between straight-length handling and controlled bending. |
| R290 · hard | 290 MPa minimum | 3% minimum | Greater resistance to deformation; use fittings or a qualified forming procedure for directional changes. |
Mechanical acceptance
These are EN temper selection benchmarks within the standard’s dimensional scope, not universal values for every C12200 tube. ASTM temper designations and test requirements must be specified separately. Yield strength, hardness and actual elongation vary with cold work and tube geometry; agree numerical acceptance limits before ordering when required.
Joining & design behavior
Soldering and brazing performance is excellent. Brazing heat can locally anneal hard-drawn tube and reduce its strength. Working pressure depends on wall thickness, diameter, temperature, final temper, joint system and the applicable design code; the alloy name alone does not establish a pressure rating.
Conduct heat.
Control the geometry.
C12200 transfers heat efficiently and forms readily, supporting compact heat exchangers and fabricated pipework. Its density also makes wall selection important when comparing material weight and cost.
The values shown are typical material properties near 20°C unless a temperature interval is stated. They describe the alloy rather than batch acceptance guarantees.
OD: outside diameter · t: wall thickness
| Physical parameter | Typical value |
|---|---|
| Density | 8.94 g/cm³ · 8,940 kg/m³ |
| Thermal conductivity | Approximately 330 W/(m·K) |
| Electrical conductivity | Approximately 85% IACS |
| Electrical resistivity | Approximately 2.03 × 10⁻⁸ Ω·m |
| Specific heat capacity | Approximately 385 J/(kg·K) |
| Elastic modulus | Approximately 117 GPa |
| Shear modulus | Approximately 44 GPa |
| Linear thermal expansion, 20–100°C | Approximately 16.9 × 10⁻⁶ /K |
| Melting temperature | Approximately 1,083°C |
Specify the tube, not just the diameter.
Common metric enquiry sizes
Dimensions below are useful starting points for quotation. Availability, tolerances and compliance are confirmed for the selected temper and product standard. Calculated weights use nominal dimensions and a density of 8.94 g/cm³.
| OD × wall, mm | ID, mm | kg/m | kg / 3 m |
|---|---|---|---|
| 6 × 1 | 4 | 0.140 | 0.421 |
| 8 × 1 | 6 | 0.197 | 0.590 |
| 10 × 1 | 8 | 0.253 | 0.758 |
| 12 × 1 | 10 | 0.309 | 0.927 |
| 15 × 1 | 13 | 0.393 | 1.180 |
| 18 × 1 | 16 | 0.477 | 1.432 |
| 22 × 1 | 20 | 0.590 | 1.769 |
| 28 × 1 | 26 | 0.758 | 2.275 |
| 35 × 1.5 | 32 | 1.411 | 4.234 |
| 42 × 1.5 | 39 | 1.706 | 5.119 |
| 54 × 2 | 50 | 2.921 | 8.763 |
Ordering parameters
Enquire for 3 m, 5 m or 6 m straight lengths, or drawing-specific cuts. Imperial straight lengths commonly include 10 ft and 20 ft. Confirm length tolerance, straightness, roundness and allowable surface condition with the quotation.
Order metric tube by actual OD × wall. ASTM B88 nominal 1/2, 3/4 and 1 in water tube have actual ODs of 5/8, 7/8 and 1-1/8 in respectively. ACR tube is commonly identified by actual OD. For a given B88 nominal size, Type K has a heavier wall than L, and L a heavier wall than M.
Natural drawn or cleaned surface; square-cut and deburred ends; protective caps, special cleaning, identification and fabrication to be agreed. Copper may develop a natural surface patina during storage.
Mass in kg/m ≈ 0.02809 × (OD − t) × t, with OD and t in millimetres. This is theoretical material weight, excluding packing and dimensional variation.
Match the standard to the application
| Specification family | Typical purchasing purpose | Details to confirm |
|---|---|---|
| ASTM B75 | General-purpose seamless copper tube | Dimensions, temper, mechanical properties and tests. |
| ASTM B88 | Seamless copper water tube | Type K / L / M, nominal size and drawn or annealed condition. |
| ASTM B280 | Air-conditioning and refrigeration service | ACR dimensions, internal cleanliness, dehydration and end closure. |
| ASTM B111 | Condenser and heat-exchanger tubes | Alloy, dimensions, temper and specified inspection requirements. |
| EN 1057 / EN 12735-1 | Sanitary/heating tube / refrigeration pipework | Relevant dimensional series, condition, cleanliness and product conformity. |
Select one applicable specification and edition in the purchase order. Meeting the C12200 chemistry alone does not establish compliance with every tube standard or service approval.
Where straight copper tube works well.
HVAC & refrigeration
Straight refrigerant lines, equipment connections and fabricated headers. Specify refrigeration-grade cleaning, dry internal condition and sealed ends, together with the refrigerant and design pressure.
Heat-transfer equipment
Condenser tubes, heat-exchanger elements and heating or cooling circuits. High thermal conductivity supports efficient heat flow; water chemistry and operating conditions determine suitability.
Water & fabrication
Water distribution, heating pipework and custom copper assemblies using the appropriate tube specification. Potable-water or other regulated service requires the relevant product approvals and joining system.
How C12200 compares.
| Alternative | Advantages of C12200 | Trade-offs to consider |
|---|---|---|
| C11000 ETP copper | Better suited to heating and joining where oxygen-bearing copper could suffer hydrogen embrittlement. | Residual phosphorus lowers electrical conductivity. C11000 is generally preferred when maximum electrical conduction is the primary requirement. |
| Oxygen-free copper | An established, practical choice for fluid tubing and brazed thermal assemblies. | Oxygen-free grades offer higher electrical conductivity and are selected for demanding electronic or vacuum applications. C12200 is not a direct replacement for those purity requirements. |
| 304 / 316 stainless steel | Much higher thermal conductivity, easier soft-condition forming and straightforward soldered or brazed fabrication. | Stainless steel can provide greater strength and better resistance to selected aggressive media. Copper needs careful compatibility checks for ammonia-containing environments and corrosive fluids. |
| Aluminum tubing | Higher thermal conductivity than many common aluminum tube alloys and familiar copper joining processes. | Copper is substantially heavier and may increase material cost. Aluminum offers weight savings, while joining methods and galvanic isolation require different design choices. |
For a reliable selection, compare the complete assembly: heat transfer, fluid compatibility, pressure, forming, joining, weight and service life. Insulate dissimilar metals where the installation requires galvanic corrosion control. For continuous flexible runs, explore C12200 copper coil tube; for electrical distribution rather than fluid transfer, compare C11000 copper busbar.
Processing support for your drawing.
Cut. Prepare. Form.
We can arrange processing options according to tube size, temper and drawing complexity:
- Cut-to-length supply with agreed length tolerance.
- Deburring and chamfering to protect sealing surfaces and flow paths.
- Flaring, expanding, reducing and end forming after feasibility review.
- Bending and fabricated tube assemblies using the appropriate temper and tooling.
- Machined features, identification and sorting by part number.
Send the drawing, quantity and critical dimensions. Tooling, sample approval and inspection requirements are agreed before production.
Define quality before production begins.
Our quality support can be tailored to your purchase specification. Agree the inspection scope and required documents with the order, including any third-party witnessing.
Material identity
Review heat or lot traceability and material documentation against the ordered alloy, composition and temper.
Dimensional control
Check OD, wall thickness, length, straightness, roundness, end condition and visible surface quality against agreed limits.
Application testing
Arrange specified mechanical, eddy-current, leak or cleanliness testing as applicable. Test reports and inspection certificates can be included when ordered.
For ACR, oxygen-sensitive or other special-duty systems, specify the required cleanliness, drying, sealing and certification separately so the delivered tube matches the actual service.
Protect the finish. Preserve the straightness.
Packaging around the tube
Protective wrapping, separated bundles, end caps and supported wooden cases can be arranged to reduce rubbing, contamination and bending during handling.
Confirm bundle weight, case dimensions, moisture protection and destination requirements. Solid-wood export packaging can be specified with the required treatment and marking.
Shipping matched to the order
We can coordinate sea freight for bulk quantities, air freight for urgent requirements and courier delivery for suitable samples or short components.
Provide the destination and required delivery date. Freight method, Incoterm, insurance, lead time and shipping documents are confirmed in the quotation.
Tell us what your copper tube needs to do.
Send OD × wall × length, quantity, temper, application standard, working conditions, processing drawing, inspection requirements and delivery destination. We will review the specification and prepare a supply and service proposal.
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