Specifies essential requirements, ranges of approval, test conditions, acceptance requirements and certification for the approval testing of welder performance for the welding of steels. The recommended format for the certificate of approval testing is given in annex B. Applies to the approval testing of welders for the fusion welding of steels. Covers approval testing of welders for work on semifinished and finished products made from wrought, forged or cast materials types listed in 5.4. Does not cover the issue of the certificate of approval testing which is under the sole responsibility of the examiner or test body.