What is UNS C11040 ETP Copper?
UNS C11040 is the dedicated designation for electrolytic tough-pitch (ETP) copper rod drawing stock produced by continuous casting to ASTM B49. It contains a minimum of 99.90% copper with controlled oxygen content (typically 100–650 ppm), which gives it the combination of drawability and conductivity that wire mills require.
Typical conductivity is 100–101% IACS, which makes C11040 rod the standard feedstock for fine wire drawing down to 0.05 mm and finer. The most common delivery size is 8 mm continuous-cast rod in coil, with other diameters available on request.
What is UNS C10200 Oxygen-Free Copper Strip?
UNS C10200 is an oxygen-free (OF) copper with a minimum of 99.95% copper and oxygen content below 10 ppm. Because it contains virtually no oxygen, it can be brazed or welded in hydrogen atmospheres without embrittlement - a key advantage in sealed electrical assemblies.
Supplied to ASTM B187 (bus bar, rod and shapes) and ASTM B152 (sheet and strip), C10200 is widely specified for electrical conductor manufacturing, transformer and switchgear components, and premium earthing strip where maximum reliability is required. Standard earthing strip section 25 mm × 3 mm is a stock size, delivered in pancake coils of 45–70 kg or palletized coils up to 1 MT.
What is UNS C11000 ETP Copper Strip?
UNS C11000 is the general-purpose ETP copper - the most commonly specified copper grade worldwide, with a minimum of 99.90% copper and conductivity of at least 100% IACS. It offers the best cost-to-conductivity ratio for the majority of electrical and grounding applications.
C11000 strip to ASTM B152 covers thicknesses from 0.05 mm foil to 12 mm heavy strip, including the 25 mm × 3 mm earthing strip section. It is suitable for bus bar, panel board, cable lugs, and general electrical conductor manufacturing.
C11040, C10200 and C11000 Specifications
UNS C11040 ETP Copper Rod (ASTM B49)
| Item | Specification |
|---|---|
| UNS designation | C11040 - continuous-cast ETP copper rod drawing stock |
| Governing standards | ASTM B49 (rod); chemical limits identical to C11000 ETP chemistry |
| Copper content | ≥ 99.90% Cu |
| Oxygen content | 100–650 ppm (typical ETP range) |
| Conductivity | 100–101% IACS |
| Tensile strength | 220–250 MPa (annealed condition) |
| Elongation | ≥ 35% (annealed) |
| Common condition | As continuous-cast / hot-rolled drawing stock |
| Size range | 8 mm standard diameter; 6.35–25 mm available; coil weights up to 4 MT |
| Tolerance class | Diameter tolerance per ASTM B49 |
| Testing performed | Chemical analysis, conductivity, tensile, elongation, spiral elongation test per ASTM B49 |
| Available forms | Wire rod coil (pancake / wound), bare rod; strip and sheet to ASTM B152 on request |
| Related products | Grade A copper cathodes (ASTM B 115-00), C11000 strip and bus bar, copper tube, brass strip |
UNS C10200 Oxygen-Free Copper Strip (ASTM B187 / B152)
| Item | Specification |
|---|---|
| UNS designation | C10200 - oxygen-free high-conductivity copper (OF) |
| Governing standards | ASTM B187 (bus bar, rod, shapes); ASTM B152 (sheet, strip, plate) |
| Copper content | ≥ 99.95% Cu |
| Oxygen content | ≤ 10 ppm |
| Conductivity | ≥ 100% IACS (typically 101%) |
| Tensile strength | 220–250 MPa (annealed, O60) |
| Elongation | ≥ 40% (annealed) |
| Common tempers | O60 annealed / H02 half-hard / H04 hard |
| Size range | Strip thickness 0.05–10 mm; width up to 650 mm; earthing strip 25 mm × 3 mm stock size |
| Tolerance class | Thickness and width tolerances per ASTM B152 |
| Testing performed | Chemical analysis, conductivity, tensile, dimensional inspection, surface inspection |
| Available forms | Strip coil, pancake coil (45–70 kg), slit strip, flat bar / bus bar, sheet |
| Related products | C11000 ETP strip, copper busbar, copper tube, Grade A copper cathodes |
UNS C11000 ETP Copper Strip (ASTM B152 / B187)
| Item | Specification |
|---|---|
| UNS designation | C11000 - electrolytic tough-pitch copper (ETP) |
| Governing standards | ASTM B152 (sheet, strip, plate); ASTM B187 (bus bar, rod, shapes) |
| Copper content | ≥ 99.90% Cu |
| Oxygen content | 100–650 ppm (typical ETP range) |
| Conductivity | ≥ 100% IACS |
| Tensile strength | 220–250 MPa annealed; 290–360 MPa in H04 hard temper |
| Elongation | ≥ 35% (annealed) |
| Common tempers | O60 / H00 / H02 / H04 / H06 / H08 |
| Size range | Strip thickness 0.05–12 mm; width up to 1,000 mm; earthing strip 25 mm × 3 mm stock size |
| Tolerance class | Thickness and width tolerances per ASTM B152 |
| Testing performed | Chemical analysis, conductivity, tensile, dimensional inspection, surface inspection |
| Available forms | Strip coil, pancake coil, slit strip, sheet, plate, flat bar / bus bar |
| Related products | C10200 oxygen-free strip, C12200 copper tube, brass strip, copper cathodes |
Get a Quote for C11040/C10200/C11000 Copper
Equivalent Grades - C11040, C10200, C11000
| Standard system | Standard number | Equivalent grade |
|---|---|---|
| UNS C11040 (ETP rod, ASTM B49) | ||
| UNS | ASTM B49 | C11040 |
| EN | EN 13600 / EN 1652 | Cu-ETP, CW004A |
| DIN | DIN 1787 | Cu-ETP (2.0065) |
| BS | BS 6017 | C101 / C102 |
| GB/T | GB/T 5231 | T2 |
| JIS | JIS H3100 | C1020 (formerly C1100) |
| UNS C10200 (oxygen-free copper) | ||
| UNS | ASTM B187 / B152 | C10200 |
| EN | EN 13600 | Cu-OFE, CW008A |
| DIN | DIN 1787 | Cu-OF (2.0070) |
| BS | BS 6017 | C103 |
| GB/T | GB/T 5231 | TU1 |
| JIS | JIS H3100 | C1011 (OFCu) |
| UNS C11000 (ETP copper) | ||
| UNS | ASTM B152 / B187 | C11000 |
| EN | EN 1652 / EN 13600 | Cu-ETP, CW004A |
| DIN | DIN 1787 | Cu-ETP (2.0065) |
| BS | BS 6017 | C101 |
| GB/T | GB/T 5231 | T2 |
| JIS | JIS H3100 | C1020 (formerly C1100) |
C11040 vs C10200 vs C11000 - How to Choose
All three grades are high-conductivity coppers, but they are optimized for different delivery forms and process routes. The table below shows the practical differences specifiers should weigh.
| Property | C11040 | C10200 | C11000 |
|---|---|---|---|
| Copper content | ≥ 99.90% | ≥ 99.95% | ≥ 99.90% |
| Oxygen content | 100–650 ppm | ≤ 10 ppm | 100–650 ppm |
| Conductivity | 100–101% IACS | ≥ 100% IACS | ≥ 100% IACS |
| Primary standard | ASTM B49 (rod) | ASTM B187 / B152 | ASTM B152 / B187 |
| Typical form | 8 mm wire rod coil | Strip, pancake coil, flat bar | Strip, sheet, bus bar |
| Best suited for | Fine wire drawing, magnet wire | Hydrogen-atmosphere brazing, premium conductors, electronics | General electrical conductor manufacturing, earthing, bus bar |
| Relative cost | Standard ETP pricing | Premium over ETP | Most economical |
For fine wire drawing, C11040 rod to ASTM B49 is the established feedstock - its continuous-cast structure and spiral elongation performance support stable drawing to ultra-fine sizes. When hydrogen brazing or vacuum applications are involved, many project teams instead specify C10200 oxygen-free copper, since ETP grades can embrittle in hydrogen.
For earthing strip and general conductors, C11000 ETP delivers identical conductivity at the lowest cost, while C10200 is chosen where oxygen-free purity is specified or where joints will be brazed. Both are available in the standard 25 mm × 3 mm section.
Not Sure Which Grade Fits Your Project? Send Us the Application
Quality Assurance, Certification and Delivery Capability
Standards Compliance
Every order is produced and inspected against the governing standard for the product form: ASTM B49 for ETP rod, ASTM B187 for bus bar and rod, ASTM B152 for strip and sheet, and ASTM B 115-00 for copper cathodes. Copper cathodes can also be supplied to BS EN 1978:1998 and NBR 5026-2001 where a project requires those references.
Mill Test Certificates - EN 10204 Type 3.1
Each production lot ships with an EN 10204 Type 3.1 material certificate issued by our inspection department, covering chemical composition, mechanical properties, conductivity and dimensional results traceable to the heat number. Certificates are provided in paper form with the documents and as scanned PDF by email before shipment.
Purity and Conductivity Guarantee
Guaranteed minimums: 99.90% copper for C11000 / C11040 ETP grades, 99.95% for C10200 oxygen-free copper, and 99.99% for Grade A cathodes. Conductivity is verified per lot at 100–101% IACS. Independent third-party verification is available on request.
Third-Party Inspection
We accept in-mill inspection by any client-nominated agency - SGS, BV, TÜV, Intertek or others - covering witness testing, pre-shipment visual and dimensional checks, and container loading supervision. Inspection slots are arranged at the buyer's convenience during production.
Dimensional Tolerances
Standard dimensional tolerances for each product form are summarized below. Closer tolerances can be quoted on request; custom slit widths, cut lengths and special straightness limits are routinely accommodated. A dimensional inspection report is issued with every lot.
| Parameter | Standard / Scope | Standard Tolerance |
|---|---|---|
| Strip & Sheet - C10200 / C11000 (ASTM B152) | ||
| Thickness 0.05–0.5 mm | Slit strip, cold-rolled | ± 0.02 mm (or ± 10%, whichever is greater) |
| Thickness 0.5–1.0 mm | Slit strip, cold-rolled | ± 0.05 mm |
| Thickness 1.0–2.0 mm | Slit strip, cold-rolled | ± 0.08 mm |
| Thickness 2.0–3.0 mm (e.g. 25 × 3 mm earthing strip) | Cold-rolled strip | ± 0.10 mm |
| Thickness 3.0–5.0 mm | Sheet / plate | ± 0.15 mm |
| Thickness 5.0–10 mm | Sheet / plate | ± 0.20 mm |
| Thickness 10–12 mm | Plate | ± 0.30 mm |
| Width - slit strip, ≤ 300 mm | Slit edge | ± 0.5 mm |
| Width - slit strip, 300–600 mm | Slit edge | ± 1.0 mm |
| Width - sheet / plate, 600–1,000 mm | Mill edge or slit | ± 1.5 mm |
| Length - sheet / plate | Cut to length | ± 5 mm (standard) / ± 1.5 mm (precision) |
| Camber | Strip / sheet | ≤ 3 mm in any 2 m length |
| Flatness | Per temper class | Per ASTM B152 class (full-hard, half-hard, soft) |
| Wire Rod - C11040 (ASTM B49) | ||
| Diameter 6.0–8.0 mm (e.g. 8 mm standard) | Continuous-cast rod | ± 0.40 mm |
| Diameter 8.0–10 mm | Continuous-cast rod | ± 0.40 mm |
| Diameter 10–16 mm | Continuous-cast rod | ± 0.50 mm |
| Diameter 16–25 mm | Continuous-cast rod | ± 0.60 mm |
| Out-of-roundness | All diameters | ≤ 50% of diameter tolerance |
| Coil weight | Per coil | ± 10% of nominal (45–70 kg pancake, up to 1 MT palletized) |
| Cast helix (pitch) | Continuous-cast rod | Per ASTM B49 cast pitch limits |
| Grade A Copper Cathode (ASTM B 115-00 / BS EN 1978) | ||
| Length | Full cathode sheet | 990 ± 10 mm |
| Width | Full cathode sheet | 970 ± 10 mm |
| Thickness | As ordered | 5–25 mm, ± 1 mm typical |
| Flatness | Full sheet | Sheared flat, burr-free edges; flatness per mill standard |
| Bundle / strapping | FCL shipment | Bundled and steel-strapped, weight per bundle per agreement |
Packing, Quantities and Lead Time
Copper strip is delivered in pancake coils of 45–70 kg or palletized coils of up to 1 MT per pallet, seaworthy wrapped and strapped for ocean transport. Rod and cathodes are packed to FCL standard. Typical contract quantities of 25–50 MT per item are routine, and trial orders of smaller volume are accepted. Standard lead time is 2–4 weeks after order confirmation, with FCL shipments arranged to major seaports worldwide.
FAQ
Q: Which grade is best for fine wire drawing - C11040 or C10200?
A: C11040 rod to ASTM B49 is the standard feedstock for fine wire drawing, offering 100–101% IACS conductivity and proven drawability in 8 mm coil. C10200 is preferred when the finished conductor will be brazed in hydrogen or requires oxygen-free purity.
Q: Can you supply both C10200 (ASTM B187) and ETP C11000 earthing strip in 25 mm × 3 mm?
A: Yes. Both grades are available in the standard 25 mm × 3 mm earthing strip section, in pancake coils of 45–70 kg or 1 MT pallets, with full dimensional compliance to ASTM B152 / B187.
Q: Do C11000 and C10200 products come with mill test certificates?
A: Every lot ships with an EN 10204 Type 3.1 certificate covering chemistry, mechanical properties, conductivity and dimensions, traceable to heat number.
Q: Do you also supply copper cathodes to ASTM B 115-00?
A: Yes. Grade A copper cathodes to ASTM B 115-00, BS EN 1978:1998 and NBR 5026-2001 are supplied in standard 990 × 970 mm sheets, thickness 5–25 mm, with ≥ 100% IACS conductivity and spiral length test results.
Q: What inspection and testing support electrical conductor manufacturing orders?
A: Conductivity measurement, tensile and elongation testing, spiral elongation testing for rod, and full dimensional inspection are performed per lot. Third-party inspection by SGS, BV or TÜV is accepted on request.
Q: What are typical minimum quantities and lead times?
A: Orders of 25 MT and above per item are routine, including combined rod / strip / cathode programs. Standard lead time is 2–4 weeks, with seaworthy export packing and FCL delivery to major ports worldwide.
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