A435/A435M -17 Standard Specification for Straight-Beam Ultrasonic Examination of Steel Plates

Designation: A435/A435M -17 Standard Specification for Straight-Beam Ultrasonic Examination of Steel Plates1 1. Scope 1.1 This specification2 covers the procedure and acceptancestandards for straight-beam, pulse-echo.ultrasonic examina-tion of rolled fully killed carbon and alloy steel plates, in.[12.5 mm] and over in thickness. It was developed to assuredelivery of steel plates free of gross internal discontinuitiessuch as pipe,ruptures.or laminations and is to be usedwhenever the inquiry， contract，order,or spccification statesthat the plates are to be subjected to ultrasonic examination. 1.2 Individuals performing examinations in accordance withthis spedification shall be qualified and certified in accordancewith the requirements of the latest edition of ASNT SNT-TC-1A or an equivalent accepted standard. An equivalentstandard is one which covers the qualification and certificationof ultrasonic nondestructive examination candidates and whichis acceptable to the purchascr. 1.3 The values stated in either inch-pound units or Sl unitsare to bc rcgarded separately as standard.Within the tcxt, theSl units are shown in brackets. The values stated in eachsystem are not exact equivalents.therefore. each system mustbe used independently of the other.Combining values from thetwo systems may result in nonconformance with the spccifi-cation. 1.4 This inrernctional ssaanxdiard was developed inr accor-dance with inrernsavionally recognized principles om sradard-izasiont essablished in the Decisiow ow Principles for rheDevelopmenr of Initerniational Standards，Guides cand Recom-Prsewddcriovs isseed by the World Trade Organizcation TecricalBcrriers to Trade(TBT) CownniIsee. 2. Referenced Documents 2.1 ASTM Standards:-