Note: The primary purpose of the American Welding Society (AWS) is to serve and benefit its members. To this end,
AWS provides a-forum for the exchange, consideration, and discussion.of ideasand proposals that are relevant to the
welding industry and the consensus of which forms the basis for these standards. By providing such a forum, AWS does
not assume any duties to which a user of these Standards may be required to adhere. By publishing this Standard, the
American Welding Society does not insure anyone using the information it contains against any liability arising from
that use. Publication of a standard by the American Welding Society does not carry with it any right to make, use, or sell
any patented items. Users of the information in this Standard should make an independent investigation of the validity
of that information for their particular use and the patent status of any item referred to herein.
This Standard is subject to revision at any time by the AWS Qualification and Certification Committee. It must be
reviewed every five years and if not revised, it must be either reapproved or withdrawn. Comments (recommendations,
additions, or deletions) and any pertinent data that may be used in improving this Standard are requested and should be
addressed to the Director, Qualification and Certification Department, American Welding Society, 550 N.W. LeJeune
Road, Miami, Florida 33126. Such comments will receive careful considerations by the AWS Qualification and
Certification Committee and the author of the comments, Guests are invited to attend all meetings of the AWS
Qualification and Certification Committee to express their comments verbally. Procedures for appeal of an adverse
decision concerning all such comments are provided in the Rules of Operation of the Qualification and Certification
Committee, A copy of these Rules can be obtained from the American Welding Society, 550 N.W. LeJeune Road,
Florida 33126.
AWS QC4-1989 pdf download
PS:Thank you for your support!
