ASMES A335 P9 Boiler Tube for Petrochemical Industry.

Yuhong Group is one of the earliest group to export Chrome Moly Pipe in China, Till now around 20 years experience for Alloy Steel Pipe and tube, which according to : ASME SA335 / ASTM A335 P1, P11, P12, P22, P5, P9, P91, P92 ; ASME SA213 /ASTM A213 T1, T11, T12, T22, T5, T9, T91, T92 . And our alloy steel pipe and tube was width used in petrochemical , oil refinery , power plant , ....

A335/SA335 P9 is a seamless ferritic alloy-steel pipe used for high-temperature applications. These pipes are versatile and can be used to transmit water, oil and natural gas. Chrome moly alloy P9 is the addition of chromium and molybdenum. Chromium, or chrome, improves high-temperature(540~750℃) strength, increases oxidation resistance and raises the tensile, yield and hardness at room temperatures. Molybdenum increases the strength, elastic limit, resistance to wear, impact qualities and hardenability. It increases the resistance to softening, restrains grain growth and makes chromium steel less susceptible to embrittlement. Moly is also the most effective additive for increasing high temperature creep strength, or creep resistance. It also enhances the corrosion resistance of steel and inhibits pitting.

1. ASTM A999/ A999M, Standard specification for common requirements for stainless and alloy steel pipe.
2. ASTM A92, Hardness test methods for steel materials.
3. E213, Instructions and practice for ultra sonic testing of steel pipe and tube.
4. E309 Eddy-Current Examniation methods for steel pipe products.
5. E381, Inspection methods for steel bars, beams, profiles, billets and forgings.
6. E527, Numbering metals and alloys practices.
7. E570, Instructions for flux leakage examniation of ferromagnetic steel pipe products.

P9 Pipe Chemical Requirements:

• Carbon - 0.15% max
• Manganese - 0.30% - 0.60%
• Phosphorus, max - 0.025%
• Sulfur, max - 0.025%
• Silicon, max – 0.25% - 1.00%
• Chromium - 8.00% - 10.00%
• Molybdenum - 0.90% - 1.10%

P9 Pipe Specifications:

• Tensile strength, min, PSI, (MPa) – 60,000 (415)
• Yield Strength, min, (MPa) – 30,000 (205)

Application of Alloy Steel ASTM A335 P9 Pipe :

• Refinery
• Machine building
• Oil and gas
• Power generation
• Petrochemicals
• Gas processing
• Fertilizer
• Sugar