Seamless carbon steel pipes are made from steel ingots or solid billets that are perforated into tubes, and then hot rolled, cold rolled, or cold drawn. Seamless carbon steel pipes play an important role in China’s steel pipe industry.

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ASTM A106 is a standard specification for seamless carbon steel pipe for high-temperature service. The “B” in ASTM A106B refers to the grade of the pipe, which indicates its minimum tensile strength and yield strength requirements. Here are the specifications for ASTM A106B pipes:

  1. Material: Seamless carbon steel pipe
  2. Grade: ASTM A106B
  3. Size Range: NPS 1/8″ to NPS 48″ (DN 6 to DN 1200)
  4. Wall Thickness: Schedule 20 to XXS (2 mm to 50 mm)
  5. Length: Random or specific cut lengths (typically 6 meters or 12 meters)
  6. Ends: Plain ends, beveled ends, or threaded ends
  7. Coating: Black lacquer, varnish, or bare surface
  8. Manufacturing Process: Hot-finished or cold-drawn
  9. Chemical Composition:
    • Carbon (C): 0.30% maximum
    • Manganese (Mn): 0.29-1.06%
    • Phosphorus (P): 0.035% maximum
    • Sulfur (S): 0.035% maximum
    • Silicon (Si): 0.10% minimum
    • Copper (Cu): 0.40% maximum (optional)
    • Nickel (Ni): 0.40% maximum (optional)
    • Chromium (Cr): 0.40% maximum (optional)
    • Molybdenum (Mo): 0.15% maximum (optional)
    • Vanadium (V): 0.08% maximum (optional)
  10. Mechanical Properties:
    • Tensile Strength: 60,000 psi (415 MPa) minimum
    • Yield Strength: 35,000 psi (240 MPa) minimum
    • Elongation: 30% minimum
  11. Hydrostatic Test: Each pipe shall be subjected to a hydrostatic test to ensure leak-tightness.
  12. Certification and Marking: The pipes shall be certified and marked with relevant information, including ASTM A106B, size, heat number, and manufacturer’s name or brand.

It’s important to note that these specifications are based on the information available up until September 2021, and it’s always advisable to refer to the latest version of the ASTM A106 standard for the most accurate and up-to-date specifications.

Rizhao Azure-B Supply Chain Co.,Ltd is the top steel pipe stockist and distributor in China. As a first-tier agency of several major steel companies in China including TPCO, Baosteel and so on, We are committed to offering an easier way to international trade, leaving clients rest easy. Generally we hold steel pipe stock of at least 15000 tons per months with a sales about 30000 tons per month. In view of the special steel trade system in China, we are a major player in Chinese Steel market.

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