BS ISO 19675:2017 pdf download – Non-destructive testing — Ultrasonic testing — Specification for a calibration block for phased array testing (PAUT) 1 Scope This document specifies requirements for the dimensions, material and manufacture of a steel block for calibrating ultrasonic test equipment used in ultrasonic testing with the phased array technique. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5577, Non-destructive testing — Ultrasonic testing — Vocabulary EN 16018, Non-destructive testing — Terminology — Terms used in ultrasonic testing with phased arrays EN 10025-2, Hot rolled products of structural steels — Part 2: Technical delivery conditions for non-alloy structural steels 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5577 and EN 16018 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http:// www .electropedia .org/ — ISO Online browsing platform: available at http:// www .iso .org/ obp 4 Abbreviated terms ACG angle-corrected gain FSH full-screen height RF radio frequency SDH side-drilled hole SNR signal- to-noise ratio TCG time-corrected gain 5 Manufacture 5.1 Steel Blocks shall be manufactured from steel grade S355J0, in accordance with EN 10025-2, or equivalent. 5.2 Pre-machining and heat treatment 5.2.1 Raw blocks Raw blocks shall be rough-machined to a dimension of 320 mm × 120 mm × 30 mm before heat treatment. 5.2.2 Heat treatment The heat treatment shall consist of: 1) austenitizing at 920 °C for 30 min; 2) rapid cooling (quenching) in water; 3) tempering by heating to 650 °C for 3 h; 4) cooling in still air. 5.2.3 Checking prior to final machining It is recommended to pre-machine the block to the following dimensions: 305 mm × 101 mm × 26,5 mm. All external surfaces shall be pre-machined to a roughness value not greater than 1,6 μm R a . The pre-machined block shall be in accordance with the following. a) It shall be free from internal discontinuities. For this purpose, an ultrasonic test shall be carried out after heat treatment, with a longitudinal wave straight-beam probe of at least 10 MHz nominal centre frequency and having a transducer...
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