ARMY MIL-HDBK-1265-1998 RADIOGRAPHIC INSPECTION CLASSIFICATION AND SOUNDNESS REQUIREMENTS FOR STEEL CASTINGS《钢铸件分级和致密性要求的射线探伤》.pdf

1、MIL-HDBK-1265 m 9999970 02b231b 590 m NOT MEASUREMENT SENSITIVE MIL-HDBK-1265 19 Auqust 1998 SUPERSEDING MIL-STD-1265A (MR) 28 May 1987 DEPARTMENT OF DEFENSE HANDBOOK RADIOGRAPHIC INSPECTION, CLASSIFICATION AND SOUNDNESS REQUIREMENTS FOR STEEL CASTINGS This handbook is for guiance oniy. Do not cite

2、this document as a requirement. AMSC N/A AREA NDTI Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M I L:H D B K - II 2 65 9999970 0262317 427 m MIL-HDBK-1265 FOREWORD 1. This handbook is approved for use by all Departments and Agencies of the Depart

3、ment of Defense. 2. This handbook is for guidance only. This handbook cannot be cited as a requirement. If it is, the contractor does not have to comply. 3. MIL-HDBK-1265 prescribes classification and soundness requirements for steel castings. The castings are classified by classes, grades, and crit

4、icality levels. Included in the handbook are four tables of maximum permissible radiographic severity levels for discontinuities in various wall thickness for steel castings per ASTM E186, E192, E280 and E446. 4. All information and data contained in this handbook have been coordinated with industry

5、 and the U.S. Army, Navy, Air Force and DLA prior to publication. 5. Copies of this document and revisions thereto may be obtained from the Defense Automated Printing Service (DAPS), 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094. 6. Beneficial comments (recommendations, additions, del

6、etions) and any pertinent data which may be of use in improving this document should be addressed to: Director, U.S. Army Research Laboratory, Weapons and Materials Research Directorate, ATTN: AMSRL-WM-M, Aberdeen Proving Ground, MD 21005-5069, by using the Standardization Document Improvement Propo

7、sal (DD Form 1426) appearing at the end of this document or by letter. ii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- HIL-HDEK-32bS m 9999970 O262338 363 MIL-HDBK-1265 CONTENTS PARAGRAPH Foreword 1 . SCOPE 1.1 Scope 2 . APPLICABLE DOCUMENTS 2.1

8、General 2.2 Government documents . 2.2.1 Specifications. standards. and handbooks . 2.3 Non-Government publications 2.4 Order of precedence 3 . DEFINITIONS 3.1 Classification . 3.1.1 3.1.1.1 3.1.1.2 3.1.1.3 3.1.1.4 3.1.2 3.1.2.1 3.1.2.2 3.1.2.3 3.1.2.4 3.1.2.5 3.1.3 3.2 3.2.1 Classes Class 1 Class 2

9、 Class 3 Class 4 Grades . Radiographic grade A . Radiographic grade B . Radiographic grade E . Criticality levels . Lot definition . Inspection lot . Radiographic grade C . Radiographic grade D . 4 . GENERAL REQUIREMENTS 4.1 Inspection . 4.1.1 Responsibility for inspection 4.1.2 Qualification for in

10、spection . 4.1.3 Final inspection . 4.1.3.1 Documentation for final inspections 5 . DETAILED REQUIREMENTS 5.1 Determination of classes. srades and criticallv levels . . 5.1.1 Class 1 requirements . 5.1.2 Radiographic grades 5.1.3 Criticality levels . 5.2 Standards 5.2.1 Radiographic standards . 5.3

11、Examination of resubmitted inspection lots . 5.3.1 Rejection 5.3.2 Review . 6 . NOTES 6.1 Intended use . 6.2 Producibility warning 6.3 Table notes 6.4 Subject term (key word) listing PAGE . ii 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 4 4 iii Provided by IHSNot for ResaleNo reproduction or

12、 networking permitted without license from IHS-,-,-PARAGRAPH fl Il, - H D B K-II 2 65 W 9999970 0262339 2TT W MI L-HDBK- 12 65 CONTENTS PAGE - TABLES I Maximum permissible radiographic severity levels for discont,inuities in thin wall steel castings (1 in. (25.4 mm) wall or less) per ASTM E192. 6 Ma

13、ximum permissible radiographic severity levels for discontinuities in thick wall steel castings Maximum permissible radiographic severity levels for discontinuities in steel castings up to IV Maximum permissible radiographic severity levels for II (2 to 4 l/Z-in. (51 to 114-mm) per ASTM E186 7 2 in.

14、 (51 nun) in thickness per ACTM E446 7 III . discontinuities in heavy walled (4 1/2 to 12-in. (114 to 305-nun) steel castings per ASTM E280 8 V Sample size for inspection of class 1 castings 8 VI Sample size for inspection of class 2, 3, and 4 castings . 8 . CONCLUDING MATERIAL. 9 iV Provided by IHS

15、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-HIL-HDBK-LZb5 9999970 0262320 TLL MIL-HDBK-1265 1. SCOPE 1.1 Scope. This handbook prescribes the requirements for the classification and soundness of steel castings exclusive of weld repair. This handbook supplements

16、detail casting specifications when specified. This handbook is for guidance only. This handbook cannot be cited as a requirement. If it is, the contractor does not have to comply. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed below are not necessarily all of the documents referenced here

17、in, but are the ones that are needed in order to fully understand the information provided by this handbook. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. U

18、nless otherwise specified, the issues of these documents are those listed in the latest issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto. STANDARDS DEPARTMENT OF DEFENSE MIL-STD-410 - Nondestructive Testing Personnel Qualification and Certifica

19、tion (Unless otherwise indicated, copies of the above specifications, standards, and handbooks are available from the Defense Automated Printing Service (DAPS), 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111- 5094.) 2.3 Non-Government publications. The following document(s) form a part of t

20、his document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the latest issue of the DoDISS, and supplement thereto. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM E186 - Standard Reference Radiographs for Heav

21、y Walled (2 to 4 1/2-in. (51 to 114-m) Steel Castings (DoD adopted) ASTM E192 - Standard Reference Radiographs for Investment Steel Castings of Aerospace Applications (DoD adopted) ASTM E280 - Standard Reference Radiographs for Heavy Walled (4 1/2 to 12-in. (114 to 305-mm) Steel Castings (DoD adopte

22、d) Up to 2 in. (51 mm) in Thickness (DoD adopted) ASTM E446 - Standard Reference Radiographs for Steel Castings ASTM E1742 Standard Practice for Radiographic Examination (DoD adopted) (Application for copies should be addressed to the American Society for Testing and Materiais, 100 Barr Harbor Drive

23、, West Conshohocken, PA 19428- 2959.) 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-fi I L. - H D B K- 3 2 b 5 9999970 0262323 958 H MIL-HDBK-12 65 2.4 Order of precedence. In the event of a conflict between the text of this document and the refe

24、rences cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. DEFINITIONS 3.1 Classification. Castings shall be classified by classes, applicable grades and criticality

25、levels. 3.1.1 Classes. 3.1.1.1 Class 1. A casting in which a single failure would cause significant danger to operating personnel or would result in a significant operational penalty. In the case of missiles, aircraft and other vehicles, this includes loss of major components, loss of control, unint

26、entional release or inability to release armament stores, or failure of weapon installation components. 3.1.1.2 Class 2. A casting not included in class 1 but of unknown margin of safety. 3.1.1.3 Class 3. Castings having a margin of safety of 200 percent or less. 3.1.1.4 Class 4. Castings having a m

27、argin of safety greater than 200 percent, or for which no stress analysis is required. 3.1.2 Grades Castings shall be of grades A, B, C, D or E as shown in tables I, II, III and IV. Grade A castings would contain the least and/or the smallest size discontinuities. Grades B, C, D and E would contain

28、progressively larger and more numerous discontinuities. Sections of a casting may be of varying grades, depending on the applied stresses to that portion of the castings. 3.1.2.1 Radiographic qrade A. A casting that is subject to high stresses when used in critical applications. 3.1.2.2 Radiographic

29、 qrade B. A casting or specified area of a casting used for criti.ca1 applications with a small design safety factor. 3.1.2.3 Radiographic grade C. A high quality grade of casting or area of a casting used for general applications with an average safety factor. 3.1.2.4 Radiographic grade D. A castin

30、g or area of a casting that is subject to low stresses. 3.1.2.5 Radiographic grade E. A casting used for armor purposes only. 3.1.3 Criticality levels (KL). The criticality level designates the amount of radiographic coverage for each casting. Castings shall be of criticality levels, KL1, KL2, or KL

31、3. Those areas designated KL1 shall have a minimum of 75% radiographic inspection coverage. Areas designated KL2 shall require 50% minimum radiographic coverage. Those areas designated KL3 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-12

32、bS H 9999970 0262322 894 R MIL-HDBK-1265 * do not require radiographic inspection but are generally radiographed for information purposes. 3.2 Lot definition. 3.2.1 Inspection lot. Unless otherwise specified, class 1 castings shall be inspected in accordance with table V, and class 2, 3, and 4 casti

33、ngs shall be selected for inspection in accordance with table VI. If class of casting is not identified on drawings, class 2 shall apply. 4. GENERAL REQUIREMENTS 4.1 Inspection. 4.1.1 Responsibility for inspection. The contractor is responsible for furnishing all supplies in conformance to contract

34、OK purchase order requirements and, unless otherwise specified in the contract or purchase order, the performance of all inspection requirements contained herein. The inspection provisions contained herein shall become a part of the contractors overall inspection system or quality program. The absen

35、ce of inspection requirements does not relieve the supplier of his responsibility for assuring that all supplies submitted to the Government for acceptance conform to all requirements of the contract. The Government reserves the right to perform any of the inspections set forth herein, or otherwise

36、specified in the contract or purchase order, when such inspections are deemed necessary to assure that supplies conform to prescribed requirements. 4.1.2 Qualification for inspection. Personnel performing radiographic inspection shall be qualified in accordance with MIL-STD-410D. Radiographic inspec

37、tion of production castings shall be conducted in accordance with ASTM E1742. 4.1.3 Final Inspection. Castings shall be inspected as specified herein unless the design activity has information substantiating the suitability of other inspection plans. 4.1.3.1 Documentation for final inspections. For

38、all castings for which radiographic inspection is specified, the contractor shall prepare either photographs, X-ray film, sketches, documents or drawings containing: (a) Classification of casting. (b) Alloy and heat treatment. (cl Grade(s) or defect limits as applicable. 5. DETAILED REQUIREMENTS 5.1

39、 Determination of classes, grades and criticality levels. The design activity shall establish the class, grade and criticality level by critical areas and stress levels for each casting design. The classification(s) and critical area(s) shall be indicated on the applicable drawing. If grade of casti

40、ng is not indicated on drawing or other contractual document, grade C shall apply. 5.1.1 Class 1 requirements. All areas of class 1 castings shall be of a quality equivalent to or better than grade C, except that all critical 3 Provided by IHSNot for ResaleNo reproduction or networking permitted wit

41、hout license from IHS-,-,-MIL-HDBK-1265 9999970 0262323 720 MIL-HDBK-1265 areas of a class 1 casting shall be of a quality equivalent to or better than grade B (see tables I, II, III and IV). 5.1.2 Radiographic grades. The design activity shall specify on the drawing or other document the (quality l

42、evel) radiographic grade(s) for classes 1, 2 and 3 castings designs. The design activity may specify radio- graphic grade(s) for class 4 casting designs. Either castings, or section of castings, shall be of grades A, B, C, D or E as shown in tables I, II, III and IV, and shall be in accordance with

43、the reference radiographs specified in the tables, unless the design activity has information substantiating the suitability of castings with more extensive defects. 5.1.3 Criticality levels. The design activity shall specify the criticality level required for each classification of casting. Class 1

44、 castings shall be completely radiographically examined and no criticality level designation is needed. Classes 2, 3 and 4 shall have areas designated by criticality level. 5.2 Standards. 5.2.1 Radiographic standards. Radiographic standard grades shall be established for each casting design for whic

45、h radiographic inspection is specified. Such standards shall be in terms of ASTM E186, ASTM E192, ASTM E280 and ASTM E446. Maximum acceptable defects shall be in accordance with paragraph 5.1. 5.3 Examination of resubmitted inspection lots. 5.3.1 Rejection. Defects and/or discontinuities which are s

46、o aligned as to cause stress concentration are causes for rejection. If more than 25% of any lot of type I Aircraft or type II Guided Missile castings given 100% inspection is rejected because of discontinuities in highly stressed areas, the entire lot shall be submitted to review procedures. Castin

47、gs not conforming to this specification shall be rejected and submitted to review procedures. 5.3.2 Review. In performing the review of the rejected lot, the cognizant engineering member of the review board may detail a technique for the subjection of a casting to a destructive test, either by loadi

48、ng (as in service use) or by dissection, as practicable. This consideration shall be predicated on the size of the rejected lot, the size of the castings and criticality of the casting application. 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, bu

49、t is not mandatory.) 6.1 Intended use. This handbook is to be used as a guide to define the requirements for the classification and soundness of steel castings exclusive of weld repair. 6.2 Producibility warnirrq. The class assigned to the casting should represent a realistic value for the functional requirements. Do not assign a type I casting for a type II function. Casting design coupled with 4 Provided by IHSNot for ResaleNo reproductio