C11000/T2 Copper Pipe

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UNS C11000: The standard designation in North America (ASTM standards).

T2: The standard designation in China (GB/T standards).

 

C11000 Red Copper Pipe is a high-purity (99.9%+) copper alloy, also called Electrolytic Tough Pitch (ETP) copper, known for its exceptional electrical/thermal conductivity, corrosion resistance, and malleability, making it ideal for HVAC/refrigeration lines, electrical wiring, plumbing (hot/cold water), and decorative uses due to its excellent workability and solderability, meeting standards like ASTM B111, DIN 1785, and JIS.

 

C11000 copper pipe is made from a copper-based alloy withly high purity, usually containing over 99.9% copper.

Key Characteristics & Properties

Purity: Minimum 99.9% copper content, containing trace amounts of oxygen.

Conductivity: Excellent for heat and electricity transfer.

Workability: Highly ductile, allowing for bending, forming, and soldering (brazing/welding).

Corrosion Resistance: Good resistance in various environments.

Strength: Good mechanical strength, especially for its application type.

 

Common Applications

HVAC & Refrigeration: Air conditioning, refrigeration lines, heat exchangers.

Electrical: Bus bars, ground straps, wires, connectors, commutators.

Plumbing: Water supply lines (hot & cold), water heaters, solar heating.

Other: Oil cooler pipes, decorative items.

 

Industry-leading C11000 red copper tube production technology

Equivalent Specifications

SPECIFICATIONS	DESIGNATION
ISO	Cu-ETP
Europen	Cu-ETP
BS	Cu-ETP-2
JIS	C-1100
Russian	MO

 

Chemical Composition

Copper+Silver With Ag:	Tin Sn:	Zinc Zn:	Lead Pb:	Nickel It is:	Iron Fe:
≥ 99.90	≤ 0.002	≤ 0.005	≤ 0.005	≤ 0.005	≤ 0.005
Antimony Sb:	Sulphur S:	Arsenic As:	Bismuth Bi:	Oxygen O:	Impurity:
≤ 0.002	≤ 0.005	≤ 0.002	≤0.001	≤ 0.06	≤0.1

 

Mechanical Properties

Tensile Strength Kb (MPa):	Elongation D10 (%):	Elongation D5 (%):
≥ 275	≥ 5	≥10

 

C11000 Copper Alloy Specifications

End Product	Specification
Bands, Projectile Rotating	MILITARY MIL-B-20292
Bar	ASME SB133, ASTM B152, SAE J461, J463
Bar, Bus	ASTM B187
Bar, Forging	ASTM B124
Bolts	ASTM F468
Brazing Filler Metal	FEDERAL QQ-B-650
Foil, Printed Circuits	ASTM B451
For, Forging	ASTM B124
Forgings, Die	ASTM B283
Nuts	ASTM F467
Pipe, Bus	ASTM B188
Plate	AMS 4500, ASTM B152, SAE J461, J463
Rod	ASME SB133, MILITARY MIL-C-12166, SAE J461, J463
Rod, Bus	ASTM B187
Screws	ASTM F468
Shapes	SAE J461, J463
Shapes, Bus	ASTM B187
Shapes, Forging	ASTM B124
Sheet	AMS 4500, ASTM B152, B694, SAE J463, J461
Sheet, Building Construction	ASTM B370
Sheet, Clad	ASTM B506
Sheet, Lead Coated	ASTM B101
Sheet, Printed Circuits	ASTM B451
Strip	AMS 4500, ASTM B694, B152, SAE J463, J461
Strip, Building Construction	ASTM B370
Strip, Clad	ASTM B506
Strip, Printed Circuits	ASTM B451
Studs	ASTM F468
Tube, Bus	ASTM B188
Tube, Welded	ASTM B447
Wire, Coated With Lead Alloy	ASTM B189
Wire, Coated With Nickel	ASTM B355
Wire, Coated With Silver	ASTM B298
Wire, Coated With Tin	ASTM B246, B33
Wire, Flat	AMS 4500, ASTM B272
Wire, Hard Drawn	ASTM B1, FEDERAL QQ-W-343
Wire, Medium-Hard Drawn	ASTM B2, FEDERAL QQ-W-343
Wire, Metallizing	MILITARY MIL-W-6712
Wire, Soft	ASTM B3, B738, B48, FEDERAL QQ-W-343, SAE J461, J463
Wire, Stranded	ASTM B8, B496, B470, B286, B229, B226, B174, B173, B172, FEDERAL QQ-B-575
Wire, Trolley	ASTM B47, B116

 

Specifications of Copper Pipes:

Copper Round Pipe: WT: 0.2mm – 120mm, OD: 2mm – 910mm

Copper Square Pipe: WT: 0.2mm – 120mm, Size: 2mmx2mm, 1016mmx1016mm

Copper Rectangular Pipe: WT: 0.2mm – 910mm, Size: 2mmx4mm, 1016mmx11219mm

Copper Pipe Schedule: SCH5, SCH10, SCH40, SCH80, SCH160

Copper Welded Pipe Size: 5.0mm – 1219.2mm

Copper Seamless Pipe Size: 4 to 219mm W. T.: 0.5 to 20mm

Copper EFW Pipe Size: 5.0mm – 1219.2mm

Copper Pipe Length: Single Random, Double Random & Cut Length.

Copper Pipe Form: Round, Square, Rectangle, Hollow, Straight, Hydraulic, etc.

Copper Pipe Hardness: 1/16 hard, 1/8 hard, 3/8 hard, 1/4 hard, 1/2hard, full hard, soft etc

Copper Pipe Grades: T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910, C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000, C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C65500, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, C72200, etc.

Copper Pipe End: Plain End, Beveled End, Treaded

 

Large-scale factory production of C11000 pure copper tubes

 

Highly reliable team supplying C11000 copper water pipe

What is the difference between C11000 and C12200?

1. The Core Difference: ETP vs. DHP

• C11000 (ETP - Electrolytic Tough Pitch): This is pure copper containing a tiny amount of Oxygen (0.02%–0.04%). The oxygen scours impurities to maximize conductivity.
• C12200 (DHP - Deoxidized High Phosphorus): This is copper where Phosphorus has been added to remove the oxygen. The residual phosphorus stays in the alloy.

 

2. Comparison Table

Feature	C11000 (ETP)	C12200 (DHP)
Full Name	Electrolytic Tough Pitch	Deoxidized High Phosphorus
Chinese Equivalent	T2	TP2
Conductivity	High (100% - 101.5% IACS)	Low (~80% - 85% IACS)
Phosphorus Content	None (Trace)	0.015% - 0.040%
Oxygen Content	Yes (0.02% - 0.04%)	Effectively Zero
Hydrogen Embrittlement	Susceptible (Risk in high heat)	Immune (Safe)
Primary Use	Electrical Components	Piping, HVAC, Heat Exchangers

 

Based on my 20 years of industry experience, this is the most critical distinction to understand. Mixing these two up is the #1 cause of failure in copper applications.

The short answer: C11000 is for Electricity, and C12200 is for Plumbing/HVAC.

Here is the detailed technical breakdown of why they are different and where to use them.

1. The Core Difference: ETP vs. DHP

C11000 (ETP - Electrolytic Tough Pitch): This is pure copper containing a tiny amount of Oxygen (0.02%–0.04%). The oxygen scours impurities to maximize conductivity.

C12200 (DHP - Deoxidized High Phosphorus): This is copper where Phosphorus has been added to remove the oxygen. The residual phosphorus stays in the alloy.

2. Comparison Table

Feature	C11000 (ETP)	C12200 (DHP)
Full Name	Electrolytic Tough Pitch	Deoxidized High Phosphorus
Chinese Equivalent	T2	TP2
Conductivity	High (100% - 101.5% IACS)	Low (~80% - 85% IACS)
Phosphorus Content	None (Trace)	0.015% - 0.040%
Oxygen Content	Yes (0.02% - 0.04%)	Effectively Zero
Hydrogen Embrittlement	Susceptible (Risk in high heat)	Immune (Safe)
Primary Use	Electrical Components	Piping, HVAC, Heat Exchangers

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3. Detailed Technical Differences

A. Conductivity (The "Deal Breaker")

This is the most important difference.

C11000: The oxygen improves conductivity. It allows electricity and heat to pass through with almost zero resistance.

C12200: The added Phosphorus severely hampers conductivity. It drops from 100% IACS to about 85% IACS.

Real World Consequence: If you use a C12200 tube for a high-current induction coil, it will overheat and fail because the resistance is too high.

 

B. Welding & Brazing (Hydrogen Embrittlement)

C11000: Because it contains oxygen, if you heat it >370°C in a hydrogen atmosphere (reducing atmosphere), the hydrogen reacts with the oxygen to form steam bubbles inside the metal. This cracks the copper. It is harder to weld safely without specialized inert gas protection.

C12200: Because the oxygen was removed by phosphorus, it is immune to hydrogen embrittlement. You can braze, weld, and heat-treat it aggressively without fear of internal cracking. This is why it is the standard for plumbing and AC pipes.

 

4. Application Guide: Which one to buy?

 

Choose C11000 (ETP / T2) if:

Electrical Conductivity is priority #1.

You are making: Busbars, electrical wires, hollow conductors (magnet wire), ground straps, or microwave waveguides.

You do not plan to do heavy welding in a hydrogen environment.

 

Choose C12200 (DHP / TP2) if:

Fluid transport and formability are priority #1.

You are making: Water pipes, air conditioning coils, refrigerator tubing, heat exchanger shells, or brewing vats.

You need to do extensive brazing or welding.

Electrical conductivity is not important.

 

5. Manufacturing Insight (Cost & Appearance)

From a manufacturing standpoint:

Cost: They are usually very similar in price per kg, though C12200 can sometimes be slightly more expensive due to the deoxidation process.

Appearance: To the naked eye, they look identical (reddish color). You cannot tell them apart without a chemical analysis or an electrical conductivity test.

 

Summary:

If the drawing says "Busbar" or "Conductor," buy C11000.
If the drawing says "Water Pipe" or "Evaporator," buy C12200.

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