ISO 4992-1-2020 PDF

Full title and description

Steel castings — Ultrasonic testing — Part 1: Steel castings for general purposes. This International Standard specifies requirements and procedures for ultrasonic (pulse-echo) examination of ferritic steel castings intended for general-purpose applications, including methods for detection and evaluation of internal discontinuities.

Abstract

This part of ISO 4992 sets out the ultrasonic testing (UT) techniques, acceptance levels and reporting requirements for ferritic steel castings (typically grain-refined) with wall thicknesses up to and including 600 mm. It describes the pulse-echo method of examination, criteria for evaluation of discontinuities and notes special agreement requirements for castings of greater thickness. The standard excludes austenitic steels and weld joints.

General information

• Status: Published
• Publication date: March 2020 (2020-03)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 77.040.20; 77.140.80
• Edition / version: Edition 2 (2020)
• Number of pages: 30

Details above are derived from the official ISO record for ISO 4992-1:2020 and national-adoption records. The 2020 edition replaces ISO 4992-1:2006.

Scope

Applies to ultrasonic inspection of ferritic steel castings for general-purpose use, typically after grain-refining heat treatment, and for wall thicknesses up to and including 600 mm. The document specifies inspection techniques (pulse-echo), transducer and scanning arrangements, calibration procedures, acceptance criteria and reporting. For castings thicker than 600 mm, the standard requires special agreement between purchaser and supplier regarding test procedure and acceptance levels. The standard does not apply to austenitic castings or welds.

Key topics and requirements

• Ultrasonic (pulse-echo) testing methods and recommended equipment for ferritic steel castings.
• Calibration procedures, reference blocks and sensitivity settings to ensure reliable detection of internal discontinuities.
• Definition of acceptance criteria and evaluation rules for discontinuities (size, location and orientation considerations).
• Guidance for inspection of castings with wall thicknesses up to 600 mm and requirements for special agreements for greater thicknesses.
• Exclusions: austenitic steels and welded joints are outside the scope.

These topics form the technical core of the standard and guide both test laboratories and manufacturers in implementing consistent UT practices for steel castings.

Typical use and users

Used by foundries, nondestructive testing (NDT) laboratories, casting purchasers, quality assurance and metallurgical engineers, design engineers specifying cast components, and inspection personnel responsible for acceptance of steel castings. The standard is referenced in purchase specifications, quality plans and NDT procedures where ultrasonic examination of ferritic castings is required.

Related standards

Key related documents include ISO 4992-2:2020 (Ultrasonic testing — Steel castings for highly stressed components) and the withdrawn 2006 edition of ISO 4992-1 which the 2020 edition replaces. Users may also reference general NDT competence and procedure standards (for example standards on personnel qualification and UT technique) when implementing ISO 4992-1.

Keywords

steel castings, ultrasonic testing, UT, pulse-echo, nondestructive testing, ferritic castings, acceptance criteria, calibration, internal discontinuities, inspection procedures

FAQ

Q: What is this standard?

A: ISO 4992-1:2020 is an international standard that specifies ultrasonic testing methods and acceptance criteria for ferritic steel castings intended for general-purpose use.

Q: What does it cover?

A: It covers pulse-echo ultrasonic examination procedures, calibration, scanning arrangements, evaluation rules and acceptance levels for internal discontinuities in ferritic steel castings up to 600 mm wall thickness; it excludes austenitic steels and welds.

Q: Who typically uses it?

A: Foundries, NDT service providers, quality and metallurgical engineers, purchasers and inspectors who need standardized UT procedures and acceptance criteria for steel castings.

Q: Is it current or superseded?

A: The 2020 edition (Edition 2) is the current published edition and it replaces ISO 4992-1:2006.

Q: Is it part of a series?

A: Yes — ISO 4992 is a multi-part series; Part 1 addresses general-purpose castings and Part 2 (ISO 4992-2:2020) covers highly stressed components with more stringent requirements.

Q: What are the key keywords?

A: steel castings, ultrasonic testing, nondestructive testing, pulse-echo, ferritic, acceptance criteria, calibration.