Copper & Copper Alloy Products (Cu-ETP, OFHC, Copper Tellurium)

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Product Overview

Om Export India Pvt Ltd is a premier manufacturer, stockist, and global supplier of high-purity Copper and Copper Alloy Products, specializing in Electrolytic Tough Pitch (Cu-ETP), Oxygen-Free High Conductivity (OFHC) Copper, and Free-Machining Copper Tellurium (Alloy 145 / CW118C). Copper belongs to the red metal classification and is recognized for its unmatched electrical conductivity (up to 100% IACS), superior thermal dissipation, malleability, and natural atmospheric corrosion resistance.

Our industrial copper piping, tubing, and bar products are precision-engineered to meet stringent international standards including ASTM, ASME, BS EN, and IS. Designed for critical fluid transport, vacuum environments, heat exchange systems, and high-voltage electrical infrastructure, our copper inventory delivers high operational reliability and low life-cycle maintenance costs.

Electrolytic Tough Pitch (Cu-ETP / C11000): Standard electrical-grade copper with a minimum 99.90% purity, ideal for busbars, power distribution, and general industrial engineering.
Oxygen-Free High Conductivity (OFHC / C10200): Ultra-pure copper (99.99% Cu) free of hydrogen embrittlement, engineered for high-vacuum electronic devices, brazed assemblies, and extreme thermal cycling.
Tellurium Copper (C14500): Free-machining copper alloy offering high chip-breaking efficiency, excellent machinability ratings (85% vs. free-cutting brass), and high conductivity retention.

Key Features

Purity Levels: Up to 99.99% Cu for maximum thermal and electrical transfer.
Formability: Cold bending, flaring, expanding, and swaging without cracking.
Corrosion Resistance: Natural formation of a protective patina resistant to atmosphere, fresh water, and industrial environments.
Dimensional Tolerance: Tight dimensional control per ASTM, EN, BS, and DIN standards.
Thermal Stability: Continuous performance at elevated temperatures with a 1083°C melting point.
Surface Finish: Bright annealed, mill finished, or polished, free of scale, dents, and internal contamination.

Product Specifications

Parameter	OFHC Copper (C10200 / CW008A)	ETP Copper (IS 1897 / C11000)	Tellurium Copper (C14500 / CW118C)
Copper Purity (Min)	99.99% Cu	99.90% Cu	99.40% Cu + 0.40–0.70% Te
Oxygen Content	< 0.001% (< 10 ppm)	0.015% – 0.040% (150 – 400 ppm)	< 0.010%
Electrical Conductivity (IACS)	100% - 101% Min	100% Min (Process Dependent)	90% - 93% Min
Thermal Conductivity	390 – 398 W/m·K	385 – 390 W/m·K	355 – 370 W/m·K
Melting Point	1083°C (1981°F)	1083°C (1981°F)	1080°C (1976°F)
Bending & Flaring Test	Passes Close 180° Bending Test	Passes Standard Bending Test	Suitable for Light Bending
Brazing & Welding Suitability	Excellent (Zero Embrittlement)	Moderate (Risk in H2 Atmospheres)	Good / Readily Soldered & Brazed
Vacuum Device Suitability	Suitable for High Vacuum Devices	Unsuitable for High Vacuum	Specialized Industrial Applications

Dimensions & Sizes

Product Type	Outside Diameter (OD) / Size Range	Wall Thickness (WT) / Gauge	Standard Length / Temper
Copper Seamless Pipes	1/8" NB to 12" NB (10.29 mm to 323.8 mm)	SCH 10, SCH 40, SCH 80, SCH 160 (1.0 mm – 12.7 mm)	3000 mm / 6000 mm / Custom Cut Lengths
Refrigeration & AC Tubing (Straight)	1/4" to 4-1/8" (6.35 mm to 104.78 mm)	0.025" to 0.120" (0.635 mm to 3.05 mm)	10 ft / 20 ft / 3 Meter / 6 Meter (Hard Drawn H58)
Copper Coils (Pancake / LWC)	3/16" to 7/8" (4.76 mm to 22.22 mm)	0.020" to 0.065" (0.50 mm to 1.65 mm)	15m / 30m / 50m Coils (Soft Annealed O60)
Capillary & Finned Tubes	1.0 mm to 6.0 mm OD (Capillary)	0.20 mm to 1.20 mm	Cut lengths & Spooled coils
Copper Round Rods & Bars	3.0 mm to 250 mm Diameter	Solid Round, Hex, Square, Rectangular	1000 mm to 6000 mm (Half Hard / Full Hard)

Chemical Composition

Grade / Alloy	Cu (%)	Te (%)	P (%)	O (%)	Pb (%)	Fe (%)	Total Impurities (%)
Cu-ETP (C11000)	99.90 Min	—	—	0.015 – 0.040	0.005 Max	0.005 Max	0.03 Max
OFHC (C10200)	99.99 Min	—	0.0003 Max	0.0010 Max	0.001 Max	0.001 Max	0.01 Max
Tellurium Copper (C14500)	99.40 Min	0.40 – 0.70	0.004 – 0.012	—	—	—	0.10 Max
Cu-DHP (C12200)	99.90 Min	—	0.015 – 0.040	—	—	—	0.01 Max

Mechanical Properties

Property	Soft Annealed (O60)	Half Hard (H02)	Hard Drawn (H04)	Tellurium Copper (C14500)
Tensile Strength (Min)	200 – 250 MPa	260 – 320 MPa	340 – 400 MPa	250 – 360 MPa
Yield Strength (0.2% Offset, Min)	70 – 100 MPa	170 – 240 MPa	280 – 330 MPa	190 – 310 MPa
Elongation in 2 inches (%)	40% – 50%	15% – 25%	5% – 12%	12% – 20%
Hardness (Rockwell / Vickers)	40 – 55 HV	75 – 90 HV	95 – 115 HV	75 – 95 HRB
Density	8.94 g/cm³	8.94 g/cm³	8.94 g/cm³	8.94 g/cm³

Standards & Specifications

BS / EN Standard	Old BS Equivalent	Form / Product Description
BS EN 1057	BS 2871 Pt 1	Seamless copper tubes for water and gas in sanitary and heating applications
BS EN 12449	BS 2871 Pt 2	Seamless round copper tubes for general engineering purposes
BS EN 12450	—	Seamless copper capillary tubes for restrictor and metering assemblies
BS EN 12451	BS 2871 Pt 3	Seamless round copper tubes for heat exchangers and condensers
BS EN 12452	—	Rolled and seamless finned copper tubes for heat exchangers
BS EN 12735	—	Seamless copper tubes for air conditioning and refrigeration (Part 1 & 2)
BS EN 13348	—	Seamless copper tubes for medical gases and vacuum pipeline systems
BS EN 13349	—	Pre-insulated copper tubes with solid covering for buried/concealed lines
BS EN 13600	BS 1977	Seamless copper tubes for electrical purposes

Applications

Copper and its alloys are utilized across high-demand industrial sectors due to their thermal transfer, electrical conductivity, and antimicrobial properties:

Electrical Infrastructure & Power Generation: High-voltage cabling, busbars, power distribution panels, transformer windings, switchgear components, and grounding electrodes.
HVAC, Refrigeration & Heat Transfer: Condenser tubes, evaporator coils, heat exchanger tubing, chiller lines, and industrial finned heat sinks.
Plumbing & Water Systems: Commercial potable water distribution, chilled water piping, central heating manifolds, and sanitary domestic plumbing.
Chemical, Petrochemical & Marine: Industrial processing lines, non-sparking fluid lines, and offshore piping requiring biofouling resistance.
Architectural & Construction: Standing seam metal roofing, architectural wall cladding, exterior facades, rainwater guttering, and flashing systems.
Precision Machining: High-speed CNC machined electrical connectors, welding torch tips, plasma nozzles, and switch parts using Tellurium Copper.

Frequently Asked Questions

Q1: What is the main difference between OFHC Copper and Cu-ETP Copper?
Cu-ETP (Electrolytic Tough Pitch) contains a controlled amount of oxygen (150–400 ppm) to ensure electrical conductivity, making it suitable for general electrical work. OFHC (Oxygen-Free High Conductivity) copper is refined to reduce oxygen to under 10 ppm, making it immune to hydrogen embrittlement during high-temperature brazing, welding, and vacuum electronics manufacturing.

Q2: Why is Tellurium Copper (C14500) preferred for high-precision components?
Tellurium Copper offers an 85% machinability rating compared to standard copper’s 20%, allowing for high machining speeds, clean chip breaking, and extended tool life while preserving over 90% IACS electrical conductivity.

Q3: What factors determine the pricing of Copper products?
Copper prices fluctuate based on London Metal Exchange (LME) and MCX commodity valuations, raw material cathode costs, currency exchange rates, product form, dimensional tolerances, and required testing certifications.

Q4: Can copper pipes be used in high-pressure refrigeration systems?
Yes, seamless copper tubes manufactured to ASTM B280 and EN 12735 standards are engineered and tested to handle high operating pressures required by modern refrigerants (such as R-410A and R-32).