SAE AMS 6303F pdf download

SAE AMS 6303F pdf download.Steel Bars and Forgings,Low Alloy, Heat Resistant 0.65Si – 1.25Cr – 0.50Mo – 0.85v(0.25 -0.30C).
1.1 Form:
This specification covers an aircraft-quality, low-alloy, heat-resistant steel in the form of bars, forgings, and forging stock.
1.2 AppIication
These products have been used typically for parts, such as turbine discs, compressor discs, and
fasteners, for service up to 1050°F (565°C), but usage Is not limited to such applications).
2. APPLICABLE DOCUMENTS:
The issue of the foliowing documents in effect on the date of the purchase order forms 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 cancelled and no superseding document has been specifIed, the last published issue of that document shall apply.
2,1 SAE Publications:
Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org.
AMS 2251 Tolerances, Low-Alloy Stee’ Bars
AMS 2259 Chemical Check Analysis Limits. Wrought Low-Alloy and Carbon Steels
AMS 2301 Steel Cleanliness, Aircraft Quality, Magnetic Particle Inspection Procedure
AMS 2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel, Wrought Products and Forging Stock
AMS 2372 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel, Forgings
3.3.3.4 Decarburization shall be measured by the metallographic method, by the HR3ON scale hardness testing method, or by a traverse method using microhardness testing in accordance with ASTM E 384. The hardness method(s) shall be conducted on a hardened but untempered specimen protected during heat treatment to prevent changes In surface carbon content. Depth of decarburization, when measured by a hardness method, is defined as the perpendicular distance from the surface to the depth under that surface below which there is no further increase in hardness. Such measurements shall be far enough away from any adjacent surface to be uninfluenced by any decarburization on the adjacent surface. In case of dispute, the depth of decarburization using the microhardness traverse shall govern.
3.3.3.4.1 When determining the depth of decarbunzation, it is permissible to disregard local areas provided the decarbunzation of such areas does not exceed the above limits by more than 0.005 inch (0.13 mm) and the width is 0.065 inch (1.65 mm)or less.
3.4 Quality:
The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the product.
3.4.1 Steel shall be aircraft-quality conforming to AMS 2301.
3.4.2 Bars ordered hot rolled or cold drawn or ground, turned, or polished shall, after removal of the standard machining allowance in accordance with AS1182, be free from seams, laps, tears, and cracks open to the ground, turned, or polished surfaces.
3.4.3 Grain flow of die forgings, except in areas which contain flash-line end grain, shall follow the general contour of the forgings showing no evidence of reentrant grain flow.
3.5 Tolerances:
Bars shall conform to all applicable requirements of AMS 2251.
4. QUALJTY ASSURANCE PROVISIONS:
4.1 Responsibility for Inspection:
The vendor of the product shall supply all samples for vendors tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements.
4.2 Classification of Tests:
4.2.1 Acceptance Tests: Composition (3.1), condriion (3.2). macrostruclure (3.3.1). average grain size (3.3.2), decarburization (3.3.3), frequency-severity cleanliness (3.4.1), and tolerances (3.5) are acceptance tests and shall be performed as applicable.
4.2.2 Periodic Tests: Grain flow of die forgings (3.4.1) is a periodic test and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser.
4.3 Sampling and Testing:
Shall be as follows:
4,3.1 Bars and Forging Stock: In accordance with AMS 2370.
43.2 Forgings: In accordance with AMS 2372.