SAE AMS 4871F pdf download

SAE AMS 4871F pdf download.Aluminum Bronze, Centrifugal and Chill Castings 85Cu – 11Al-3.6Fe Solution Heat Treated and Tempered.
1.1 Form:
This specification covers an aluminum bronze alloy in the form of centrifugal and chill castings.
1.2 Application:
These castings have been used typically for parts requiring high strength at moderate temperatures, but usage is not limited to such applications.
2. APPLICABLE DOCUMENTS:
The issue of the following 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 canceled 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
AMS 2360 Room Temperature Tensile Properties of Castings
AMS 2630 Ultrasonic Inspection. Product Over 0.5 Inch (12.7 mm) Thick
AMS 2694 Repair Welding of Aerospace Castings
AMS 2750 Pyrometry
AMS 2804 Identification, Castings
3.3 Casting:
Castings shall be p4’oduced in lots from metal conforming to 3.1. Metal remelted from previously analyzed ingot may be poured directly into castings. Molten metal taken from alloying furnaces, with or without additions of foundry operating scrap (gates, sprues, risers, and rejected castings), shall not be poured into castings unless first converted to ingot, analyzed, and remelted or unless the composition of a sample taken after the last addition to the melt conforms to 3.1.
3.3.1 A melt shall be the metal withdrawn from a batch-furnace charge of 2000 pounds (907 kg) or less as melted for pouring castings or, when permitted by purchaser, a melt shall be 4000 pounds (1814 kg) or less of metal withdrawn from one continuous furnace in not more than eight consecutive hours.
3.3.2 A lot shall be all castings poured from a single melt in not more than eight consecutive hours and
solution heat treated and tempered in the same heat treatment batch.
3.4 Test Specimens:
Chemical analysis specimens and tensile coupons shall be cast as follows:
3.4.1 Chemical An&ysis Specimens: Shall be cast from each melt and shall be of any convenient size, shape, and form.
3.4.2 Tensile Coupons: Shall be cast from each melt of metal, in permanent molds, used for pouring castings. Coupons shall be of such size to allow machining tensile specimens conforming to ASTM E 8 or ASTM E 8M with 0.500 inch (12.70 mm) diameter at the reduced parallel gage section. Metal for the coupons shall be part of the melt which is used for the castings and shall be poured at a temperature not lower than the temperature of the metal during pouring of the castings.
3.5 Heat Treatment:
Castings and representative tensile coupons shall be heat treated as in 3.5.1 and 3.5.2; at least one set of tensile coupons shall, during each stage of heat treatment, be put into a batch-type furnace with each load of castings or Into a conhnuous furnace at intervals of not longer than three hours. Pyrometry shall be in accordance with AMS 2750.
3.5.1 Solution Heat Treatment: Heat to a temperature within the range 1600 to 1700°F (871 to 927 °C), hold at the selected temperature within ±25 °F (±14 °C) for not less than two hours, and quench in water.
3.5.2 Tempering: Heat to a temperature within the range 1100 to 1200 °F (593 to 649 °C), hold at the selected temperature within ±15 °F (±8 °C) for not less than two hours, and cool in air to room temperature.
3.6 Properties:
Castings and representative tensile coupons produced in accordance with 3.4.2 shall conform to thefollowing requirements:
3.6.1 Tensile Properties: Shall be as follows, determined in accordance with ASTME 8 or ASTM E 8M;
conformance to the requirements of 3.6.1.1 shall be used as the basis for acceptance of castingsexcept when purchaser specifies that requirements of 3.6.1.2 apply:
3.6.1.1Separately-Cast Coupons: Shall be as specified in Table 2.