Downloaded from https://www.everyspec.com ADS-43A-HDBK All FSP materials must be traceable to the original foundry melt with traceability maintained throughout manufacturing and processing to the finished part. Serialization of all parts therefore must be established and maintained, unless waived by USAATCOM engineering. Records will be made available to USAATCOM engineering on demand and should be maintained for five (5) years unless otherwise specified. Typical generic material critical characteristics are as follows: A. Composition B. Grain size C. Forging flow lines D. Case hardness E. Core hardness F. Finish G. Class IA castings H.
Class of weld 2.2.1.1 Justification for Materials Critical Characteristics The prospective vendor will inspect and test all ferrous and non-ferrous metallic materials in accordance with Federal Test Method Standard No. 15 1. If the material has been certified by the supplier, it must be verified in accordance with the prospective vendor’s approved quality assurance plan. When material is inspected by melts, heats, or lots, the supplier or vendor must so arrange his working, handling, and marking of the material to maintain its proper identity. Such procedures must be made available to USAATCOM engineering upon request.
When doubt exists as to the identity of any portion of the material, it is incumbent on the supplier or vendor to properly establish such identity of that portion or the lot will be rejected. The material composition and grain size will be exactly as specified on the drawing. Alternate materials may be used only if listed on the drawing. Materials will be certified by the supplier and verified by the vendors quality assurance office. Forging will be procured only from approved vendors. Since strength and fatigue properties are affected by flow line direction, flow line direction will be as specified on the drawing.
Case and core hardness are also critical to strength, wear, and fatigue properties of material. Therefore, case and core hardness must be as specified on the drawing. Finish specifications must be closely followed to allow for good fit and to reduce the possibility of crack initiation. Class 1A aircraft quality castings are required for all FSP and must be procured only from approved vendors. Castings must be certified by the supplier and verified by the vendors quality assurance office. Classes of welds will be as specified on the drawing. Stress relief procedures will be rigidly followed to reduce the possibility of crack initiation in welded areas. 1 2