Home > Seamless Tube > Copper / Brass / Bronze Seamless Tubes
Inox Steel India supplies a wide range of Copper, Brass and Bronze Seamless Tubes used across industries that require excellent thermal conductivity, corrosion resistance, machinability, and long-term reliability.
Manufactured as per ASTM B68, ASTM B111, ASTM B135 and ASTM B359, these non-ferrous seamless tubes deliver consistent performance in HVAC systems, heat exchangers, desalination plants, marine cooling circuits, chemical processing lines, instrumentation and architectural applications.
Copper and copper-based alloys are preferred when a combination of heat transfer efficiency, smooth internal surface, antimicrobial performance, and corrosion resistance is required.
These seamless tubes ensure uniform wall thickness, enhanced workability, and exceptional durability across a wide variety of engineering and fluid-handling applications.
These tubes are produced via extrusion, cold drawing, annealing and solution-based processes, ensuring precise dimensional accuracy and clean internal surfaces.
Backed by certified raw materials and stringent testing, Inox Steel India supplies non-ferrous seamless tubes across India, GCC, Africa, Southeast Asia and Europe.
MASTER TECHNICAL DATASHEET:
Copper / Brass / Bronze Seamless Tubes
| Parameter | Copper / Brass / Bronze Seamless Tubes |
|---|---|
| Applicable Standards | ASTM B68 (Seamless Copper Tubes) • ASTM B111 (Copper-Nickel Tubes) • ASTM B135 / B466 (Brass Tubes) • ASTM B111 / B359 (Bronze Tubes) |
| Grades Available | Copper-Nickel: CuNi 90/10, CuNi 70/30 • Brass: C26000, C27200 • Bronze: Aluminum Bronze / Phosphor Bronze |
| Material Class | Copper Base Alloys |
| Manufacturing Process | Seamless Extruded • Cold Drawn • Annealed • Stress Relieved |
| Size Range (OD) | 3 mm to 168 mm |
| Thickness Range | 0.5 mm to 10 mm |
| Length Options | 3m • 6m • 12m • Coil Tubes • Custom Cut Length |
| Mechanical Properties | Tensile: 200–450 MPa • Yield: 80–250 MPa • Elongation: 30–45% |
| Thermal Conductivity | Very High – Suitable for Heat Exchange Applications |
| Corrosion Resistance | Excellent in seawater (CuNi 90/10 & 70/30) • High resistance to biofouling • Good resistance to stress corrosion |
| Heat Treatment | Annealed • Light Annealed • Temper-Hardening (Brass / Bronze) |
| Surface Finish | Mill Finish • Annealed & Pickled • Polished • Clean ID Tubes |
| Dimensional Tolerances | Strict OD/WT tolerances as per ASTM B68 / B111 / B135 |
| End Finish | Plain Ends • Deburred Ends • Flare / Flange-ready |
| Mandatory Testing | Hydrostatic Test • Eddy Current Test • Hardness • Tensile Test |
| Special Testing | Conductivity Test • Microstructure • Corrosion Test • UT (Optional) |
| Documentation Provided | MTC EN 10204 3.1 • Chemical / Mechanical Reports • NDT Reports |
| Key Grade Benefits | CuNi 90/10: Marine & seawater lines • CuNi 70/30: Higher corrosion resistance • Brass: Good machinability & aesthetics • Bronze: High strength + anti-friction properties |
| Typical Applications | HVAC & AC Tubing • Desalination • Marine Cooling Systems • Heat Exchangers • Chemical Processing • Plumbing • Instrumentation • Decorative & Architectural |
Copper-based alloys are widely used where thermal conductivity, corrosion resistance, smooth internal flow, and clean fluid transfer are essential.
CuNi alloys offer unmatched seawater resistance, while Brass and Bronze serve high-machinability and mechanical strength requirements.
Best Grades: Copper (ASTM B68) · CuNi 90/10
Recommended: CuNi 70/30 · Brass · Admiralty Brass
Best Grades: CuNi 90/10 · CuNi 70/30
Copper alloys deliver stability in mild chemicals and low-pressure applications.
Applications:
Best Grades: Bronze • Brass (C26000/C27200)
Preferred for their formability, clean flow path and durability.
Applications:
Recommended: Brass Tubes
Brass & Bronze provide a premium aesthetic appeal.
Used For:
Best Grades: Brass • Bronze
| Application | Recommended Grade | Why |
| HVAC & refrigeration | Pure Copper (B68) | High thermal conductivity |
| Seawater cooling | CuNi 90/10 · 70/30 | Excellent seawater resistance |
| Heat exchangers | CuNi 70/30 · Brass | Smooth ID & corrosion resistance |
| Instrumentation | Brass C26000 / C27200 | Easy bending & clean flow |
| Wear components | Bronze | High strength & anti-friction |
| Alloy Type | OD Range | WT Range | Typical Use |
| Copper (B68) | 3 – 100 mm | 0.5 – 5 mm | HVAC, refrigeration |
| CuNi 90/10 & 70/30 | 6 – 168 mm | 1 – 10 mm | Marine & desalination |
| Brass Tubes | 6 – 120 mm | 0.6 – 6 mm | Instrumentation |
| Bronze Tubes | 8 – 140 mm | 1 – 8 mm | Wear & marine parts |
| Grade | Price Range (₹/kg) |
| Copper Tubes (B68) | ₹850 – ₹1,200 |
| CuNi 90/10 | ₹1,200 – ₹1,650 |
| CuNi 70/30 | ₹1,450 – ₹1,900 |
| Brass Tubes | ₹550 – ₹850 |
| Bronze Tubes | ₹700 – ₹1,100 |
Yes — ASTM B68 copper tubes are the global standard for AC, refrigeration and HVAC systems. Yes. CuNi and Brass tubes are widely used in condenser and heat exchanger applications due to their smooth ID and corrosion resistance. Yes — coil form tubes for refrigeration, HVAC and instrumentation are available. MTC 3.1, Chemical/Mechanical reports, Conductivity tests, NDT reports, and heat treatment charts. Are copper tubes suitable for air conditioning?
Can these tubes be used for heat exchangers?
Do you supply coil tubes?
What documentation is provided?