ASTM B68 Bright Annealed Seamless Copper Pipe

 

 

Standard	Material Grade	Process	Temper	Form
ASTM B68 / ASME SB68	C10200, C12000, C12200	Bright Annealed Seamless	Hard / Soft (H / O)	Straight Lengths / Coils

 

Outside Diameter (OD)	Wall Thickness (WT)	Standard Length	Remarks / Form
3.00 mm	0.30 mm	5 m – 6 m	Coil or Straight
4.76 mm (3/16")	0.40 mm	5 m – 6 m	Coil or Straight
6.35 mm (1/4")	0.50 mm	5 m – 6 m	Coil or Straight
9.52 mm (3/8")	0.60 mm	5 m – 6 m	Coil or Straight
12.70 mm (1/2")	0.71 mm	5 m – 6 m	Coil or Straight
15.88 mm (5/8")	0.81 mm	5 m – 6 m	Coil or Straight
19.05 mm (3/4")	0.91 mm	5 m – 6 m	Straight Length
22.22 mm (7/8")	1.02 mm	5 m – 6 m	Straight Length
25.40 mm (1")	1.12 mm	5 m – 6 m	Straight Length
28.58 mm (1-1/8")	1.22 mm	5 m – 6 m	Straight Length
31.75 mm (1-1/4")	1.32 mm	5 m – 6 m	Straight Length
34.92 mm (1-3/8")	1.42 mm	5 m – 6 m	Straight Length
38.10 mm (1-1/2")	1.52 mm	5 m – 6 m	Straight Length
42.00 mm	1.65 mm	5 m – 6 m	Straight Length
50.80 mm (2")	1.83 mm	5 m – 6 m	Straight Length
54.00 mm	2.00 mm	5 m – 6 m	Straight Length
63.50 mm (2-1/2")	2.29 mm	5 m – 6 m	Straight Length
76.20 mm (3")	2.50 mm	5 m – 6 m	Straight Length
88.90 mm (3-1/2")	3.00 mm	5 m – 6 m	Straight Length
101.60 mm (4")	3.20 mm	5 m – 6 m	Straight Length

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Dimensional Tolerances (Typical per ASTM B68)

Outside Diameter: ±0.05 mm (≤25 mm OD), ±0.10 mm (>25 mm OD)

Wall Thickness: ±10%

Length: ±10 mm

 

Bright Annealed Straight Pipes: Lengths of 1 m to 6 m

Bright Annealed Coils: 15 m – 30 m per coil (annealed temper)

Custom Sizes: Available upon request (special OD/WT combinations and tight tolerances)

All tubes are bright annealed in a controlled atmosphere furnace, ensuring oxide-free internal and external surfaces.

Tubes may be nitrogen-filled and sealed with plastic caps for oxygen or refrigerant use.

Conforms to ASTM B68 / ASME SB68 dimensional and tolerance standards.

 

 

 

Element	C10200 (%)	C12200 (%)
Copper (Cu)	99.95 min	99.9 min
Phosphorus (P)	–	0.015 – 0.040
Oxygen (O)	≤ 0.001	≤ 0.040
Others	≤ 0.05	≤ 0.05

 

Property	Hard (H)	Soft (O)
Tensile Strength (MPa)	250 – 310	200 – 240
Elongation (%)	≥ 25	≥ 35
Hardness (HV)	70 – 100	50 – 70
Density (g/cm³)	8.9	8.9

 

✨ Bright & Smooth Surface – Mirror-like finish, oxide-free inside and outside.

⚙️ High Dimensional Precision – Tight tolerances suitable for automated assembly.

💧 Excellent Cleanliness – Ideal for refrigerant, oxygen, and hydraulic fluid systems.

⚡ Superior Conductivity – High electrical and thermal conductivity.

🧊 Good Corrosion Resistance – Stable in moisture, gases, and mild industrial environments.

🔧 Easy Formability & Weldability – Suitable for bending, flaring, and brazing.

Inside and outside surfaces are bright, smooth, and free from oxidation or scaling.

No grease, oil, or residue - suitable for oxygen and refrigerant systems.

Optionally available with nitrogen filling and plastic end caps to prevent contamination.

 

Protective plastic caps on both ends

Packed in plastic film, bundles, or wooden boxes

Nitrogen-filled packaging available for medical or refrigeration applications

Custom labeling with size, grade, and heat number

Fast delivery: 7–15 working days depending on quantity

 

All products comply with ASTM B68 / ASME SB68 standards and are inspected before shipment:

100% Eddy Current or Hydrostatic Testing

Dimensional Accuracy & Surface Inspection

Chemical Composition & Mechanical Property Test

Mill Test Certificate (MTC) provided with each batch

 

Q1: What is the main difference between ASTM B68 and ASTM B75 copper tubes?
A1: ASTM B68 specifies bright annealed seamless copper tubes with a bright, oxide-free surface, while ASTM B75 covers seamless copper tubes with standard annealing and surface finish.

Q2: What does "bright annealed" mean?
A2: "Bright annealed" means the tube is heat-treated in a controlled atmosphere to achieve a shiny, oxide-free surface both inside and outside.

Q3: Is ASTM B68 suitable for refrigeration and oxygen lines?
A3: Yes. ASTM B68 tubes are ideal for refrigerant, oxygen, and high-purity gas applications due to their clean internal surfaces.

Q4: Which copper grades are available for ASTM B68?
A4: Common grades include C10200 (Oxygen-Free Copper) and C12200 (Phosphorus-Deoxidized Copper).

Q5: Can I order custom coil lengths or nitrogen-filled packaging?
A5: Absolutely. We offer custom coil lengths, nitrogen-filled tubes, and OEM labeling upon request.

 

📧 Email: office@dongmjd.com

📞 Phone / WhatsApp: +86 15769214734

We are a trusted manufacturer and supplier of ASTM B68 Bright Annealed Seamless Copper Pipes (C10200 / C12200) - providing precision, high-purity, and corrosion-resistant copper tubing for HVAC, refrigeration, and industrial applications worldwide.

 

 

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