Chrome Moly Alloy Flanges

F91, F22, F5, F11, F9, F92 ( ASTM A182 & ASME SA182 ) - Alloy Flanges

U.S. Metals is a premier worldwide supplier for all your Chrome Moly Alloy A182 / SA182 Flange needs.

Our Chrome Alloy Flange inventory is unsurpassed and is considered one of the most extensive chrome inventories in the world!

Turnarounds or outages, planned retrofits or emergency situations, grassroots projects worldwide; U.S. Metals has the experienced staff to assist you on all of your specialty alloy requirements, no matter how detailed the specification, no matter how difficult the situation.

New industry requirements, not an issue. We work closely with agencies like EPRI along with our utility and refining clients to be on the cutting edge of new industry requirements that affect your high energy/high temperature piping systems.

Our inventory is evolving to meet the new specifications that prevent current issues as creep cracking and hardness problems.



  • Trade Name
    Grade
    UNS #
    Flanges
    1 1/4 Chrome
    F11 Class 1
    K11597
    A182 / SA182
    1 1/4 Chrome
    F11 Class 2
    K11572
    A182 / SA182
    1 1/4 Chrome
    F11 Class 3
    K11572
    A182 / SA182
    2 1/4 Chrome
    F22 Class 1
    K21590
    A182 / SA182
    2 1/4 Chrome
    F22 Class 3
    K21590
    A182 / SA182
    5 Chrome
    F5
    K41545
    A182 / SA182
    9 Chrome
    F9
    K90941
    A182 / SA182
    F91
    F91
    K90901
    A182 / SA182
    F92
    F92
    K92460
    A182 / SA182
  • This specification covers forged low alloy flanges for use in pressure systems manufactured to specified dimensions or industry standard dimensional specifications. 

    For bars and products machined directly from bar refer to Specification A/SA739 for the similar grades available in this specification. Products made to this specification are limited to a maximum weight of 10 000 lb [4540 kg]. For larger products and products for other applications, refer to Specification A/SA336 / A/SA336M for the similar low alloy grades available in this specification.

    Several grades of low alloy steels are included in this specification. Selection will depend upon design and service conditions.

    Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.
It is the purchaser's responsibility to specify in the purchase order all ordering information necessary to purchase the needed material.

In addition to the ordering information guidelines in Specifications A/SA961 / A/SA961M, orders should include the following information:

  • Additional requirements, and
  • Description of flange and nominal dimensions (standard or special)
  • Requirement, if any, that manufacturer shall submit drawings for approval showing the shape of the rough forging before machining and the exact location of test specimen material.
Information provided in this page is in accordance with the 2013 Edition of the ANNUAL BOOK OF ASTM STANDARDS
Refer to ASME B & PV Code Section II for non-identical A/SA requirements.