MIL-STD-336 Flash Welding Standard for Low Carbon Steel – DoD Manual PDF (EN)

Downloaded from https://www.everyspec.com MIL-STD-336 DEPARTMENT OF DEFENSE Washington, DC 20301 Welding, Flash, Standard Low Carbon Steel 1. This Military Standard is approved for use by all Departments and Agenclea of the Department of Defense. 2. Beneficial comments (recommendations, additiona, deletiona) and any pertinent data which may be of use in improving this document should be addressed to: US Army Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, MI 48397-5000, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. ii

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Downloaded from https://www.everyspec.com MIL-STD-336 FOREWORD This document contains information on a welding process where fusion is w achieved over the entire abutting surfaces of two plates, bars or tubes without utilization of filler metal in one welding operation. This fusion is achieved by the heat generated by the resistance to the flow of electric current between the faying surfaces followed by the application of pressure when the required heating is completed. iii ---

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Downloaded from https://www.everyspec.com MIL-STD-336 Page SCOPE G .***..****. G *********=* G *********.9.**. Scope....................................... 1 1 Paragraph 1. 1.1 2. 2.1 2.1.1 2.2 2.3 REFERENCED DOCUMENTS......................... Government documents........................ Specification............................... Other publications .......................... Order of precedence ......................... 2 2 2 2 2 3. 3.1 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 DEFINITIONS G . G G G .....,..,........ G . G G .... G ... Definitions................................. Faying surface.............................. Flash........... G G . G . G . . . G G . . G . . . G . . . , G . .

. . . Flash welding. G ..... G .........** G G ...*...... Production run.............................. Upset....................................... Upset distance .............................. Weld failure................................ 3 3 3 3 3 3 3 3 3 4. 4.1 4.1.1 /81’) ....- 4.1.3 4.1.4 4.1.5 4.1.6 4.2 4.2.1 4.3 GENERAL REQUIREMENTS......................... Requirements ................................ Equipment................................... @.~~t~~~. ................--.+...:.==*.====: Electrodes.................................. Control of machine variables................ Welding schedules........................... Flash removal...............................

Materials ................................... Cleaning.................................... Inspection requirements..................... 4 4 4 & 4 4 4 4 4 5 5 DETAILED REQUIREMENTS........................ Joint preparation........................... Joint alignment tolerances.................. Sheet and tubular joints.................... Bars........................................ Angular misalignment........................ Limitation on tubing........................ Certification of welding schedules.......... Flash welding schedules..................... Welding schedule content.................... Establlshlng weldlng schedules... ........... ., 6 6 6 6 6 6 6 6 6 8 9 9 5.

5.1 5.1.1 5.1.1.1 5.1.1.2 5.1.1.3 5.1.1.4 5.2 5.2.1 5.2,1 5.2.3 5.~.3.] General......................*.............. Existing schedules or modification of existing schedules......................... 5.2.3.2 9 iv

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Downloaded from https://www.everyspec.com MIL-STD-336 CONTENTS - Continued. Paragraph 5.2.4 5,2.5 5.3 5.3.1 5.4 5.4.1 5.4.2 5.4.3 5.4.4 5.4.5 5.4.6 5.5 5.5.1 5.5.2 5.6 5.6.1 5.7 Production run.............................. Individual part certification ............... Certification test specimens................ Types of specimens .......................... Test procedures ............................. Contractor inspection....................... Production control.......................... Sample testing.............................. Visual examination .......................... Destructive tensile tests................... Tensile tests...............................

Test requirements........................... Whole specimens.o...........o............... Strip test coupons.......................... Machine maintenance ......................... Retests..................................... Certification of equipment ................. 9 9 9 9 10 10 10 10 10 10 10 10 10 11 11 11 11 6. 6.1 6.2 6.3 NOTES.... G * G .... G *O. G ..........**,.,. G .....,. Intended use................................ Protective atmosphere welding ............... Subject term (key word) listing............. 12 12 12 12 FIGURES Figure 1. Recommended end preparation for flash butt welding of tubing, flat sheet, and bars .......................... 7 Figure 2.

Record of welding schedule............................ 8 v

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