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The ASTM B42 Seamless Copper Pipe is produced from phosphorus-deoxidized, high residual phosphorus (DHP) copper designated as UNS C12200. This alloy provides excellent resistance to hydrogen embrittlement and outstanding thermal and electrical conductivity. The seamless structure ensures uniform wall thickness, leak-free performance, and high mechanical strength, making it ideal for water supply systems, HVAC, and general engineering applications.
Each pipe is manufactured in compliance with ASTM B42 and is subjected to rigorous testing for chemical composition, mechanical properties, and dimensional accuracy to ensure long-lasting performance and consistent quality.
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High Quality
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Advanced Equipment
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Professional Team
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Custom Service
Products Description
✅ Material: Phosphorus-Deoxidized Copper (C12200 / DHP Copper)
✅ Standard: ASTM B42
✅ Type: Seamless Round Pipe
✅ Finish: Bright Annealed or Mill Finish
✅ Temper: Drawn (H58) or Annealed (O60)
✅ Corrosion-Resistant to water, steam, and mild chemicals
✅ Excellent Weldability and Formability
✅ High Thermal & Electrical Conductivity
Chemical Composition (Typical %)
| Element | Cu (incl. Ag) | P | Others |
|---|---|---|---|
| Content | 99.9 (min) | 0.015 – 0.040 | ≤ 0.06 |
Mechanical Properties
| Property | Annealed (O60) | Drawn (H58) |
|---|---|---|
| Tensile Strength (MPa) | ≥ 205 | ≥ 250 |
| Yield Strength (MPa) | ≥ 65 | ≥ 205 |
| Elongation (%) | ≥ 30 | ≥ 10 |
| Hardness (HV) | ≤ 65 | ≥ 80 |
Standard Dimensions (ASTM B42 Seamless Copper Pipe)
| Nominal Size (in.) | Outside Diameter (in.) | Outside Diameter (mm) | Wall Thickness (in.) | Wall Thickness (mm) | Typical Length (m) |
|---|---|---|---|---|---|
| 1/4 | 0.375 | 9.52 | 0.030 | 0.76 | 3.0 – 6.0 |
| 3/8 | 0.500 | 12.70 | 0.035 | 0.89 | 3.0 – 6.0 |
| 1/2 | 0.625 | 15.88 | 0.035 | 0.89 | 3.0 – 6.0 |
| 5/8 | 0.750 | 19.05 | 0.040 | 1.02 | 3.0 – 6.0 |
| 3/4 | 0.875 | 22.23 | 0.045 | 1.14 | 3.0 – 6.0 |
| 1 | 1.125 | 28.58 | 0.050 | 1.27 | 3.0 – 6.0 |
| 1-1/4 | 1.375 | 34.93 | 0.055 | 1.40 | 3.0 – 6.0 |
| 1-1/2 | 1.625 | 41.28 | 0.060 | 1.52 | 3.0 – 6.0 |
| 2 | 2.125 | 53.98 | 0.070 | 1.78 | 3.0 – 6.0 |
| 2-1/2 | 2.625 | 66.68 | 0.080 | 2.03 | 3.0 – 6.0 |
| 3 | 3.125 | 79.38 | 0.090 | 2.29 | 3.0 – 6.0 |
| 4 | 4.125 | 104.78 | 0.107 | 2.72 | 3.0 – 6.0 |
| 5 | 5.125 | 130.18 | 0.125 | 3.18 | 3.0 – 6.0 |
| 6 | 6.125 | 155.58 | 0.140 | 3.56 | 3.0 – 6.0 |
📎 Custom dimensions, tempers, and cut-to-length services available upon request.
Applications
Plumbing and water supply systems
HVAC and refrigeration tubing
Heat exchangers and condensers
Industrial piping systems
Solar energy and gas lines
General mechanical and structural use
Dimensional Tolerances
| Parameter | Tolerance |
|---|---|
| Outside Diameter | ±0.002 in. (±0.05 mm) |
| Wall Thickness | ±10% |
| Length | ±3 mm (per meter) |
| Straightness | 1.5 mm per meter max deviation |
Surface & End Finish
Plain Ends or Deburred Ends
Bright Annealed or Mill Finish
Protective Plastic Caps on Both Ends
Cleaned and Packed for Export
Packing & Delivery
Plastic film + woven bags or wooden cases
Standard export seaworthy packaging
Marking: ASTM B42 – C12200 – Size – Heat No.
Delivery: 7–25 days depending on quantity
FAQ (Frequently Asked Questions)
Q1: What is ASTM B42 standard?
A1: ASTM B42 covers seamless copper pipe made from C12200 (phosphorus-deoxidized copper) for plumbing, air-conditioning, and general engineering applications.
Q2: What is the difference between ASTM B42 and ASTM B88?
A2: ASTM B42 applies to general seamless copper pipe (usually thicker wall), while ASTM B88 is mainly for water tube service with specific pressure ratings (Type K, L, M).
Q3: What are the typical tempers available?
A3: ASTM B42 seamless copper pipes are available in Annealed (O60) and Drawn (H58) tempers.
Q4: Do you offer cut-to-length or custom sizes?
A4: Yes, custom lengths and wall thicknesses are available according to customer requirements.
Q5: Can you provide Mill Test Certificates (MTC)?
A5: Yes, MTCs per EN 10204 3.1 or equivalent are provided with each shipment.
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