What is the purity of C11000 copper?

What is C11000 copper?

C11000 Electrolytic Tough Pitch (ETP) is the most common copper product on the market. It is also referred to as Copper Alloy 110 or C110 Copper and is 99.9% copper. Its conductivity, corrosion resistance, and ductility, in addition to its durability, aesthetic appeal, and excellent finishing properties allow it to be used in many applications.

One of the most remarkable qualities of C110 Copper is its high electrical conductivity, with a rating of 100+ % IACS. It is easy to use and has excellent corrosion resistance to weathering, including soil, which make it great for water and underground conditions.

The purity of C11000 (ETP) copper is a minimum of 99.90% copper (Cu), with the allowance that this percentage includes any silver (Ag) present.

Here are the precise details:

Minimum Copper + Silver: 99.90% (This is the "purity" figure).

Typical Copper Content: Usually between 99.90% to 99.96%.

Key Intentional "Impurity": It contains a controlled 0.02% to 0.04% oxygen, which is a defining characteristic of "Tough Pitch" copper and is not considered a detrimental impurity in standard applications.

Other Elements: The remaining very small fraction (up to ~0.05%) consists of strictly limited trace elements like iron, lead, and sulfur.

In summary: While often called "pure copper," C11000 is more accurately described as a high-purity, slightly oxygenated commercial-grade copper. For 99.99% pure, oxygen-free copper, the specific grade is C10100 (OFE).

Mechanical & Electrical Properties

Form	Tensile Strength In N/MM²			Elongation In %			Hardness in BHN			Conductivity % IACS at 20°C
Form	Annealed condition	Half hard Condition	Full Hard Condition	Annealed condition	Half hard Condition	Full Hard Condition	Annealed condition	Half hard Condition	Full Hard Condition	Conductivity % IACS at 20°C
Rod	≥ 200	≥240	≥290	35	15	10	45-60	65-85	85-110	≥97
Flat	≥ 200	≥240	≥290	35	15	10	45-60	65-85	85-110	≥97
Profile	≥ 200	≥240	≥290	35	15	10	45-60	65-85	85-110	≥97
Short Circuit Ring	≥ 200	-	-	35	-	-	45-60	-	-	≥99.0
Rotor Bar	≥ 200	-	-	35	-	-	-	-	-	≥99.0
Tube as extruded Condition	-	-	-	-	-	-	45-60	-	-	≥97
Forged Block	-	-	-	-	-	-	45-60	-	-	≥97

C11000 Copper Pipe

C11000 Copper Plate

C11000 Copper Rod

C11000 Copper Wire

Physical Properties

Melting Point – Liquidus °C	1083
Melting Point – Solidus °C	1065
Density lb/cu in. at 20°C	0.322
Specific Gravity	8.91
Electrical Conductivity% IACS at 20°C	101
Thermal Conductivity Btu/ sq ft/ ft hr/ °C at 20°C	226
Coefficient of Thermal Expansion 20 – 100 10^-6 per °C (20 – 100°C)	9.4
Coefficient of Thermal Expansion 20 – 200 10^-6 per °C (20 – 200°C)	9.6
Coefficient of Thermal Expansion 20 – 300 10^-6 per °C (20 – 300°C)	9.8
Specific Heat Capacity Btu/ lb /°C at 20°C	0.092
Modulus of Elasticity in Tension ksi	17000
Modulus of Rigidity ksi	6400

Applicable Form & Size

Form	Size
Rod	Dia : Ø10 mm-Ø145mm, Length : 2 Mtr max
Flat / Rotor Bar	Thick : 5 mm-60 mm Width : 20 mm-150 mm Length -2 Mtr max
Profile	Circumscribing circle of Dia 30 to 150 mm
Wheel	Dia : Ø400 mm max, Thick : 5 mm – 50 mm
Tube as Extruded Condition	ID : - Ø45 mm- Ø117mm OD :– Ø85 mm- Ø150mm
Forged Block	Thick : 170 mm max Width : 320 mm max Length : 600 mm max
Short Circuit Ring	OD : Ø270 – Ø830 mm, ID : Ø160 – Ø700 mm, Thick : 17mm to 90mm

Typical Applications

Electrical

Electrical Busbars

Electrical Conductors & Connectors

Electrical Contacts for MV/HV Switchgear Application

Industrial

Short Circuit Ring and Rotor bar for Industrial Motor Application

Heat Exchangers

Product Forms We Can Provide

Product Category	Material Standards	Common Alloys	Key Specifications (Can be Customized)
Copper Tubes	ASTM B75, B88, B280,B111; EN 12449, 12451; DIN EN 12735; JIS H3300	C10100 (OFE), C11000 (ETP), C12200 (DHP), C23000, C70600,C71500	OD: 3mm - 300mm Wall Thickness: 0.5mm - 20mm Temper: Soft (O), Half-Hard (H50), Hard (H80) Form: Straight Lengths, Coils, U-Bends
Copper Sheets / Plates	ASTM B152, B248, B248M; EN 1652; DIN 1787; JIS H3100, H3250	C10100 (OFE), C11000, C10200 (OF), C26000, C86200	Thickness: 0.3mm - 100mm Width: Up to 1200mm Length: Up to 3000mm (or coils) Surface: Mill, Polished, Brushed
Copper Rods / Bars	ASTM B187, B301, B411; EN 12163, 12164; DIN 17672; JIS H3250	C10100 (OFE), C11000, C14500, C36000, C63000	Diameter/Rect. Size: 3mm - 300mm Shape: Round, Square, Hexagonal, Rectangular Condition: Drawn, Extruded, Hot Rolled
Copper Wires	ASTM B1, B2, B3, B258; EN 13601; IEC 60228; JIS H3100	C10100 (OFE), C11000, C14420, C14500	Diameter: 0.1mm - 20mm Temper: Soft, Annealed, Hard-Drawn Form: Bare, Tinned, Stranded, on Spools
Copper Foils / Strips	ASTM B103, B370; EN 1652; DIN 1787; JIS H3100	C10100 (OFE), C10200, C11000, C19400, C26800	Thickness: 0.02mm - 2.0mm Width: Up to 600mm Temper: Rolled, Annealed
CNC Machining Parts	As per Customer Drawing/Req.	All Common Copper Alloys (including C10100, C11000, C86200, etc.)	Process: Turning, Milling, Drilling, Tapping Tolerance: ±0.005mm - ±0.1mm Post-Processing: Deburring, Polishing, Plating

Our factory

Our manufacturing facility operates a comprehensive and modern production line, equipped with advanced continuous casting, precision rolling, high-speed drawing, and multi-axis CNC machining centers, enabling us to process copper and copper alloys (such as C10100, C11000, C12200, C71500,C70600 etc.) into a full range of products including tubes, sheets, rods, wires, and foils. To ensure top-tier quality, we have implemented a rigorous in-process and final inspection system, utilizing state-of-the-art equipment such as spectrometers for material verification, digital tensile testers for mechanical property checks, precision dimensional gauges, and eddy current or ultrasonic testers for defect detection, guaranteeing that every product meets or exceeds international standards such as ASTM, EN, and JIS, as well as specific customer requirements.