Standard No.:	GB/T 11346-2018
English Name:	Radiograpial testing for aluminum alloy castings—Defect levels
Chinese Name:	铝合金铸件射线照相检测 缺陷分级
Chinese Classification:	J31    Casting
Professional Classification:	GB    National Standard
ICS Classification:	77.040.20 77.040.20    Non-destructive testing of metals 77.040.20
Source Content Issued by:	SAMR; SAC
Issued on:	2018-07-13
Implemented on:	2018-8-1
Status:	valid
Superseding:	GB/T 11346-1989 Standard radiographs for inspection grading of gas porosity(round) in aluminum alloy casting
Target Language:	English
File Format:	PDF
Word Count:	4500 words
Translation Price(USD):	130.0
Delivery:	via email in 1 business day

GB/T 11346-2018 Radiograpial testing for aluminum alloy castings — Defect levels 1 Scope This standard specifies the personnel requirements, film requirements, defect levels, level assessment and assessment records for radiographic testing of aluminum alloy castings (hereinafter referred to as castings). This standard is applicable to the defect levels of radiographic testing of aluminum alloy castings with a thickness not exceeding 50 mm. This standard is not applicable to the manufacturing of aluminium alloy die-castings. This standard is not applicable to the defect levels such as cracks, insufficient filling, core deviation, cold shuts and surface irregularities. 2 Normative references The following referenced documents are indispensable for the application 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. GB/T 5611 Foundry terminology GB/T 5677 Castings - Radiographic testing GB/T 9445 Non-destructive testing - Qualification and certification of personnel GB/T 126042 Non-destructive testing - Terminology - Terms used in radiographic testing 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 5611 and GB/T 12604.2 and the following apply. 3.1 foreign materials particles that are different from the matrix metal composition existing within or on the surface of the casting Note: Foreign materials appear on the film as isolated, irregular or elongated areas of different film darkness. Including slag, sand, coating layer, oxides, sulfides, silicates, etc. 3.2 gas holes defects in the casting caused by gas, such as holes Note: The gas holes appear as dark spots in the film, either in circular or elongated shapes, with smooth edges. They exist individually or in groups, or are scattered throughout the casting. The surface is relatively smooth, mainly in the shapes of pear, circle and ellipse. Generally, they do not protrude from the casting surface. Large holes often exist alone, while small holes occur in groups. 3.3 gas porosity extruded pores of needle-sized distribution on the cross-section of the casting Note: The gas porosity appears on the film as circular or strip-shaped black dots distributed throughout the casting. 3.4 shrinkage very small holes that appear in the slowly solidifying area of the casting Note: Shrinkage appears on the film as local flocculent or honeycomb-like local darker areas. Present both within and between dendrites, these are a mixture of dispersed pores, micro-collapse and coarse-grained structures, which reduce the density of the casting.

Contents Foreword II 1 Scope 2 Normative references 3 Terms and definitions 4 Personnel requirements 5 Requirements for the film 6 Defect levels 7 Level assessment 8 Assessment record Annex A (Normative) Defect metallographs