SAE AMS 2681B pdf download
SAE AMS 2681B pdf download.Welding, Electron-Beam.
1.1 Purpose:
This specification defines the procedures and requirements for joining metals and alloys using the electron-beam (EB) welding process.
1.2 App’ication:
These procedures are used typically for electron-beam welding of aerospace components in soft to hard vacuum atmospheres, but usage is not limited to such applications. EB welding for fatigue critical applications should be performed in accordance with AMS 2680.
2. APPLICABLE DOCUMENTS:
The issue of the following documents in effect on the date of the purchase order form a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been canceled and no superseding document has been specified, the last published issue of that document shall app’y.
2.1 SAE Publications:
Available from SAE. 400 Commonwealth Drive, Warrendale, PA 15096-0001.
AMS 2630 Ultrasonic Inspection. Product over 0.5 inch (12.7 mm) Thick AMS 2631 Ultrasonic Inspection. Titanium and Titanium Alloy Bar and Billet
AMS 2632 Ultrasonic Inspection of Thin Materials, 0.50 inch (12.7 mm) and Thinner in Cross- Sectional Thickness
AMS 2680 Electron Beam Welding, For Fatigue Critical Applications
ARP1317 Electron Beam Welding
ARP 1333 Nondestructive Testing of Electron Beam Welded Joints in Titanium-Base Alloys
3.3.6 Accessory Equipment Preparation: Jigs, fixtures, and measuring devices shall be free of scale, grease, protective coatings. oxides, dust, oil, and other foreign materials detrimental to the welding process.
3.4 Procedure:
3.4.1 Electron beam weld operators shall be certified. Unless other methods are specified by purchaser. operators certified in accordance with MIL-STD-1 595 shall be acceptable.
3.4.1.1 Personnel performing welding in accordance with this specification shall be qualified under the cognizance and supervision of the designated welding activity and approved by the cognizant quality control activity. Qualified personnel shall be assigned a stamp with a number or symbol that shall be used to identity all weldments made by such personnel.
3.4.1.2 An operator undergoing qualification testing may weld a certification plate in accordance with
3.4.2 according to a pre-established schedule as part of the test.
3,4,2 Procedure Certification: Prior to production, a separate weld schedule shall be established for each joint and alloy or alloy combination to be welded. The schedule shall be prepared for each alloy, penetration, weld joint configuration, and for each cosmetic pass configuration, if required, showing all applicable items listed in Table 3.
3.4.2.1 Tacking/LockIng Passes: A tack weld or locking pass may be used to restrict relative motion in the weld assembly prior to the first full penetration pass. Weld schedule certification of a tack weld or locking pass is not required provided all of the tack welds are consumed by the penetration pass.
3.4.2.1.1 A tacking pass, other than a full-penetration pass and made with a power density setting substantially reduced from the certified settings, may be used over any portion of the weld joint up to and including the full length of the weld.
3.4.2.1.2 A full-penetration lacking pass using certified parameters may be utilized but shall not exceed
10% of the weld joint length. This locking pass shall terminate in the starting or stopping tabs, when applicable.
3.4.2.2 Cosmetic Pass: Cosmetic passes for bead appearance improvement may be applied at any time after completion of the initial full-penetration pass. Cosmetic passes, it used, shall be certified in accordance with 3.4.2.
3.4.3 Procedure Recertification: Recertification of weld schedules shall be required for failed test welds and when any change is made to the following parameters:
3,4.3.1 When a change is made in parent metal composition or a change in thickness in excess of ±10% (not applicable to cosmetic-pass-weld configuration).
