Ultrasonic testing (UT) is a method that uses high-frequency sound waves. A probe sends a pulse of sound into the material. When the sound wave encounters a boundary, like a defect or the far side of the part, it reflects back. By analyzing the time it takes for the echo to return and the strength of the signal, a trained technician can determine the location and size of internal defects without damaging the part.
ISO 5948 defines specific acceptance classes based on the severity and location of the recorded indications. Discontinuities exceeding the reference threshold are evaluated, and components are either accepted, reworked, or rejected based on these strict limits.
The core utility of the ISO 5948 document lies in its clear-cut acceptance levels. The standard categorizes internal discontinuities based on the amplitude of the reflected echo relative to a reference echo.
If you don't want to pay for ISO 5948, check (UN Regulation No. 38). It covers the same rear fog lamp requirements and is legally free from the UNECE website.
A clear statement of "Pass" or "Fail" based on the defined acceptance levels. iso 5948 pdf
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The steel used for manufacturing axles must have a tightly controlled chemical makeup. Elements like Carbon (C), Manganese (Mn), and Silicon (Si) are balanced to achieve optimal hardness and toughness, while harmful impurities like Sulfur (S) and Phosphorus (P) are strictly minimized to prevent brittleness. B. Mechanical Properties
Utilized to identify microscopic cracks or defects on or just below the surface of the steel. Destructive Testing
A reduction in the sound wave returning from the opposite wall of the component, indicating severe internal attenuation or a large defect. Ultrasonic testing (UT) is a method that uses
ISO 5948 is an international standard developed by the International Organization for Standardization (ISO), specifically under the technical committee ISO/TC 17 (Steel), Subcommittee SC 15 (Railway rolling stock material).
The standard was applicable to:
This draft is a general summary and not a substitute for the official ISO 5948 standard. For exact requirements and test methods, obtain the official PDF from an authorized standards publisher.
The standard specifies how to perform non-destructive ultrasonic tests to detect internal discontinuities. It is primarily applied when product standards (such as ISO 1005-1 for tyres or ISO 1005-3 By analyzing the time it takes for the
The ISO 5948 standard establishes a uniform methodology for detecting internal defects in railway tires using ultrasonic waves. It defines the technical requirements for the examination of both unmachined and machined tires to ensure they can withstand the high mechanical stresses of railway operations. The current version is , which was last reviewed and confirmed in 2023. 1. Scope and Application
Axles in various states of heat treatment (e.g., normalized, quenched, and tempered). 2. Key Technical Requirements
The standard provides detailed instructions on the scanning patterns and directions: