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  1. ASTM A335 GRADE P11 - Steel grades

    This page cover the ASTM A335 GRADE P11 steel grades Mechanical Properties, Chemical Element, Cross Reference of USA ASTM ASTM A335 GRADE P11 Materials, Application Seamless Ferritic Alloy Steel Pipe for High-Temperature Service,

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    Since the above are pipe material specifications, use the guidance in Table 333.1.1 from B31.3 for maximum Brinell hardness after PWHT. For carbon steel, SA-106 (P-No 1) in this table, 225 BHN is suitable for a maximum value.I would provide the values but I want you to look them up to verify for yourself.

  7. Alloy Pipe ASTM A335 P5, P9, P11, P22, P91

    Transverse/longitudinal: tension and flattening, hardness, bend tests- for material which has been heat-treated in batch furnaces, these tests shall be made on the 5% of the pipes from each heat lot number. For smaller lots, one pipe at a minimum has to be tested; ASTM A335 Gr. P91 shall have a hardness of 250 HB / 265 HV (25 HRC)

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    A335 P11 Welding Procedure. A335 P11 is an alloy steel code issued by the ASTM (ASTM). The nominal component is 25Cr-0.5Mo. The mechanical properties of P11 alloy steel tubes are of great significance to ensure the safe operation of chemical plants, especially to the stability of high temperature and high pressure pipelines in petrochemical enterprises.

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    2. B31.1 table 132 gives you some relief on P11 and P22 material in the general notes, some of which are based on material thickness, carbon content, and other considerations. 3. If the person that made the original post could tell us what hardness testing equipment is being used it could shed some light on this issue alittle.

  10. What is p11 and p22 material - Answers

    P-11 is a piping material usually used in refinery and petrochemicals industries for services at or around 550 to 600 degree C temp. It is low alloy steel.

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  13. P11 alloy steel Grade Material - PWHT scope - Google Groups

    Hi Zakaria, P11 require PWHT when you not reach the limit of hardness recomended by the Codes in the Welding and ZAC. Remember, you are work with a material like low alloy carbon steel (Cr-Mo) that is self quench in air, where the welding adquire high hardnees and residual stress not recomended to put it directly in services that demand critical conditions.

  14. H11 - Alloy Steel Grade - Universal Metals

    H11 alloy is a 5% chromium hot-work tool steel characterized by its incredible impact toughness and good red-hardness.The alloy is a deep-hardening, air-hardening steel that exhibits minimal size change during heat treatment.

  15. ASTM A335 Pipe and Featured Grades P11, P22, P91 Pipes

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    The material that is used in the manufacturing of ASTM A335 P11 has to meet requirements for hardness, tensile property and chemical composition. ASTM A335 P11 alloy steel pipe price per Kg in India is Rs 110/Kilogram.

  18. Re: P11 & P22 Hardness Issue - ndt.net

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  20. Re: [MW:6933] P11 & P22 Hardness Issue - Materials & Welding

    We are facing one serious concern regarding PWHT of weld joints of A335 Grade P11 & P22 piping in very high pressure superheated steam and syn gas service. Due to some unforeseen circumstances at our site, PWHT of some weld joints was not done effectively and resulted in higher hardness of weld joints although HAZ area hardness values are OK.

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    P20 Mold Steel. P20 Mold Steel is a versatile, low-alloy tool steel that is characterized by good toughness at moderate strength levels. The steel is commonly used for plastic injection mold cavities and tooling and for die casting dies for zinc. P20 is typically sold in the pre-hardened condition at a hardness of approximately 300 HBW.

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    1.1 This specification 2 covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding.

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