MIL-STD-2219 Fusion Welding for Aerospace Applications S/S by AWS-D17.1The scope of this document is to provide minimum requirements for weld filler materials, workmanship, inspection and record requirements for fusion welding of alloys applicable to aircraft, missiles, other aerospace equipment, their parts and accessories.

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MIL-STD-2219A

w/CHANGE 1

CONTENTS

PARAGRAPH                                                                                                            PAGE

5.3.1 Identification ..............................................................................................................17

5.3.2 Qualified weld settings...............................................................................................17

5.3.3 Reproducibility of qualified weld settings....................................................................17

5.3.3.1 When a sample is required ..................................................................................17

5.3.3.2 Sample preparation .............................................................................................17

5.3.4 Requalification of weld settings..................................................................................17

5.3.5 Welding procedures...................................................................................................18

5.3.5.1 Filler metal...........................................................................................................18

5.3.5.2 Preheating, interpass temperature control and postheating .................................18

5.3.5.2.1 Magnesium castings......................................................................................18

5.3.5.2.2 Steels............................................................................................................18

5.3.5.2.3 Other base metals .........................................................................................19

5.3.5.3 Tackwelds ...........................................................................................................19

5.3.5.4 Fixtures ...............................................................................................................19

5.3.5.5 Weld start and run-off tabs ..................................................................................19

5.3.5.6 Weld shielding for GTAW, GMAW, and PAW ......................................................19

5.3.5.7 Cleaning between welds......................................................................................19

5.3.5.8 Post weld cleaning...............................................................................................20

5.3.6 Stress relief................................................................................................................20

5.4 Inspection and acceptance criteria...................................................................................21

5.4.1 General......................................................................................................................21

5.4.2 Nondestructive inspection..........................................................................................21

5.4.2.1 Penetrant Inspection............................................................................................21

5.4.2.2 Magnetic particle inspection ................................................................................21

5.4.2.3 Radiographic inspection ......................................................................................21

5.4.2.4 Ultrasonic inspection ...........................................................................................21

5.4.2.5 Extent of inspection .............................................................................................21

5.4.3 Weld configuration.....................................................................................................22

5.4.3.1 Weld reinforcement and weld width .....................................................................22

5.4.3.2 Weld penetration .................................................................................................22

5.4.3.3 Melt-through ........................................................................................................22

5.4.3.4 Two and three piece tee joints.............................................................................23

5.4.3.5 Fillet welds...........................................................................................................25

5.4.4 Weld quality...............................................................................................................25

5.4.4.1 General ...............................................................................................................25

5.4.4.2 Discontinuity limits ...............................................................................................26

5.4.4.3 Discoloration of titanium ......................................................................................26

5.4.4.4 Discoloration of 300-series corrosion resistant steel and carbon and low alloy steels...............................................................................................................................26

5.4.5 Disposition of unacceptable welds .............................................................................28

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