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ASTM A335 P11 P9 Seamless Carbon Steel Tube Alloy Seamless Steel Pipe
Latest company news about ASTM A335 P11 P9 Seamless Carbon Steel Tube Alloy Seamless Steel Pipe

 

latest company news about ASTM A335 P11 P9 Seamless Carbon Steel Tube Alloy Seamless Steel Pipe  0

 

1. Introduction

 

ASTM A335 Standard

 

  • P11 (1.25Cr-0.5Mo-Si):
    • Composition: Cr (1.00–1.50%), Mo (0.44–0.65%), C (≤0.15%), Mn (0.30–0.60%), Si (0.50–1.00%).
    • Microstructure: Ferritic with tempered bainite for balanced strength and ductility.
  • P9 (9Cr-1Mo):
    • Composition: Cr (8.00–10.00%), Mo (0.90–1.10%), C (0.15–0.35%), Mn (0.30–0.60%).
    • Microstructure: Martensitic structure for superior creep resistance.

3. Mechanical Properties

Both grades maintain strength at temperatures up to 600°C (P11) and 650°C (P9).
4. Manufacturing Process

Power Generation

    • Oil & Gas
      • Chemical Processing

         


          • Dimensional Compliance: ASME B36.10M for wall thickness and outer diameter.
          • Testing Protocols:
            • Hydrostatic testing at 1.5× design pressure.
            • Charpy V-notch impact testing for low-temperature toughness.
            • Hardness verification to prevent material degradation.
        • 7. Selection Guidelines

          ASTM A335 P11 and P9 seamless pipes are engineered to meet the rigorous demands of modern industrial systems. Their tailored compositions, robust mechanical properties, and compliance with international standards make them indispensable in energy and chemical sectors. Future advancements may focus on enhancing their lifespan in ultra-supercritical power plants and hydrogen-rich environments.

          For detailed specifications, refer to ASTM A335-23 and ASME SA335 standards.

Pub Time : 2025-03-20 14:08:48 >> News list
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