Copper C11000 (ETP)
UNS C11000 EN / W.Nr. 2.0090
Electrolytic tough-pitch copper — 99.9% minimum, 100% IACS conductivity. Busbars, conductors, roofing, plumbing and general fabrication.
Copper & Copper Nickel — Grades & Products
High-conductivity coppers and copper-nickel alloys for marine, conductive and corrosion duty — plus copper jumpers and earthing products.
Copper & Copper Nickel — Material Overview
Copper combines the best electrical and thermal conductivity of any commercial metal with natural corrosion resistance in water and most atmospheres. C11000 (ETP) is the standard high-conductivity grade; C10200 (OFHC) is oxygen-free for electronic and hydrogen-service applications.
Copper-nickel alloys add nickel (and iron and manganese in controlled amounts) for seawater corrosion resistance, biofouling resistance and strength retention at temperature — the standard materials for ship seawater lines, condensers and desalination plants. The 90/10 (C70600) grade handles most duty; 70/30 (C71500) is specified for higher strength and velocity. ACERO ALLOYS also supplies copper connectors and jumpers for earthing and bonding.
4grades listed
8,940 kg/m³typical density (pure copper; CuNi ≈ 8.9)
5product forms
Available Grades
The grades below are the ones most often asked for. Each grade stays on this page — the material-first way to browse.
Copper C10200 (OFHC)
UNS C10200
Oxygen-free high-conductivity copper — no copper oxide inclusions, so it is weldable and hydrogen-safe. Electronic components, waveguides, vacuum and hydrogen-cooled generator windings.
CuNi 90/10 (C70600)
UNS C70600 EN / W.Nr. 2.0872
90% copper 10% nickel with iron and manganese — the standard seawater alloy for shipboard piping, condensers and desalination. Excellent biofouling resistance and weldability.
CuNi 70/30 (C71500)
UNS C71500 EN / W.Nr. 2.0882
70% copper 30% nickel — higher strength, better erosion and impingement resistance for higher-velocity seawater and naval condenser duty.
Chemical Composition (indicative)
Nominal ranges as published in the common product standards. Values are indicative and for comparison only — always purchase against the current ASTM/EN specification and the mill test certificate.
Copper C11000 (ETP)
| Element | Content |
|---|---|
| Copper (Cu + Ag) | ≥ 99.90 |
| Oxygen (O) | 0.02 – 0.04 |
Copper C10200 (OFHC)
| Element | Content |
|---|---|
| Copper (Cu + Ag) | ≥ 99.95 |
| Oxygen (O) | ≤ 0.001 |
CuNi 90/10 (C70600)
| Element | Content |
|---|---|
| Copper (Cu) | bal. (≈ 86 – 90) |
| Nickel (Ni) | 9.0 – 11.0 |
| Iron (Fe) | 1.0 – 2.0 |
| Manganese (Mn) | ≤ 1.0 |
CuNi 70/30 (C71500)
| Element | Content |
|---|---|
| Copper (Cu) | bal. (≈ 65 – 70) |
| Nickel (Ni) | 29.0 – 33.0 |
| Iron (Fe) | 0.40 – 1.0 |
| Manganese (Mn) | ≤ 1.0 |
Mechanical Properties (indicative)
Typical minimum values for the common product forms in the annealed / solution-treated condition. Actual properties depend on product form, specification revision and heat treatment.
Copper C11000 (ETP)
| Property | Value |
|---|---|
| Tensile strength (annealed, typical) | 220 – 250 MPa |
| Yield strength (annealed, typical) | ≈ 70 MPa |
| Elongation (annealed) | ≈ 45 % |
| Electrical conductivity | 100 % IACS (min 100%) |
Copper C10200 (OFHC)
| Property | Value |
|---|---|
| Tensile strength (annealed, typical) | 221 – 241 MPa |
| Electrical conductivity | ≥ 100 % IACS |
CuNi 90/10 (C70600)
| Property | Value |
|---|---|
| Tensile strength (min, annealed) | 275 MPa |
| Yield strength (min, annealed) | 105 MPa |
| Elongation (min) | 30 % |
| Density | 8.90 g/cm³ |
CuNi 70/30 (C71500)
| Property | Value |
|---|---|
| Tensile strength (min, annealed) | 345 MPa |
| Yield strength (min, annealed) | 125 MPa |
| Elongation (min) | 30 % |
| Density | 8.95 g/cm³ |
Physical Properties
| Property | Value |
|---|---|
| Density (C11000) | 8.94 g/cm³ (8940 kg/m³) |
| Density (CuNi 90/10) | 8.90 g/cm³ |
| Density (CuNi 70/30) | 8.95 g/cm³ |
| Melting point (C11000) | ≈ 1083 °C |
| Thermal conductivity (C11000) | ≈ 390 W/m·K |
| Thermal conductivity (CuNi 90/10) | ≈ 50 W/m·K |
Available Product Forms
Copper & Copper Nickel is offered in the product forms below. Availability varies by grade and size — confirm the exact combination with our sales desk.
Pipes & Tubes
Seamless and welded pipes and tubes to ASTM/ASME, IS and BS specifications — including boiler, air-preheater and corten tubes.
Sheets, Plates & Coils
Hot-rolled and cold-rolled sheets, plates, coils, circles and flats in standard and cut sizes.
Pipe Fittings
Butt-weld, forged and socket-weld fittings — elbows, tees, reducers, caps, stub ends, olets and nipples.
Bars, Rods & Wires
Bright and black round bars, square and hex bars, flats and wires in stainless, duplex, alloy, carbon and nickel-alloy grades.
Copper Connectors / Jumpers
Copper jumpers, connectors and earthing / bonding products.
Industrial Applications
- Ship seawater cooling, bilge and fire-main piping
- Power-plant and naval condensers
- Desalination plant tubing and piping
- Busbars, conductors and electrical components
- Copper jumpers and earthing/bonding connections
- Heat exchanger tubing
- Roofing, plumbing and architectural work
Applicable Standards
| Standard | Scope |
|---|---|
| ASTM B42 | Seamless copper pipe, standard sizes |
| ASTM B111 / ASME SB111 | Copper and copper-alloy seamless condenser tubes (CuNi) |
| ASTM B466 / SB466 | Seamless copper-nickel pipe and tube |
| ASTM B152 | Copper sheet, strip, plate and rolled bar |
| ASTM B187 | Copper rod, bar and shapes (busbar) |
| ASTM B122 | Copper-nickel sheet, strip, plate and rod |
| CEN / EN 1652 | Copper and copper alloys — sheet/strip/plate for general use |
| Naval specs (e.g. MIL-E-23765 equivalents) | As applicable — confirm with enquiry |
Quality & Documentation
Copper and copper-nickel products are supplied to ASTM/ASME specifications with EN 10204 Type 3.1 certification and traceability. Eddy-current and hydrostatic testing of condenser tube, plus naval-class inspection, can be arranged with the enquiry.
Related Engineering Calculators
Pipe Weight Calculator
Theoretical weight of pipe from outside diameter, wall thickness, length and material.
Round Bar Weight Calculator
Theoretical weight of round bars from diameter, length and material.
Sheet & Plate Weight Calculator
Theoretical weight of sheets and plates from length, width, thickness and material.
Unit Conversion Calculator
mm ↔ in, m ↔ ft, kg ↔ t, kg/m ↔ lb/ft and MPa ↔ psi conversions.
Frequently Asked Questions
CuNi 90/10 or 70/30 — which do I need?
90/10 covers most seawater cooling and shipboard piping: it is economical and weldable. Choose 70/30 where water velocity is higher (pump discharges, condenser inlets) or where its extra strength and erosion resistance pay for itself in thinner walls.
Why is copper-nickel used in seawater?
It resists chloride corrosion, inhibits marine biofouling (barnacles and slime attach far less than to other metals) and retains strength and ductility at seawater temperatures — a combination stainless steels cannot match in long-term immersion.
What is the difference between ETP and OFHC copper?
ETP (C11000) contains 0.02–0.04% oxygen as copper oxide — fine for most electrical and building uses. OFHC (C10200) is oxygen-free, so it can be welded and brazed without hydrogen embrittlement and suits vacuum, electronic and high-integrity applications.
Do you supply copper jumpers and earthing connectors?
Yes — copper connectors, jumpers, bonding strips and earthing products are one of our listed product forms. Send the drawing or standard requirement for quotation.
Are copper pipes heavier than brass?
Copper (8.94 g/cm³) is slightly denser than cartridge brass (8.53 g/cm³). Use our pipe weight calculator for theoretical weights of any copper alloy.
Need Copper & Copper Nickel Priced?
Send the grade, product form, size and quantity — our sales desk replies with an offer and lead time within one business day.