SAE AMS 4787F pdf download
SAE AMS 4787F pdf download.Gold-Nickel Alloy, Brazing Filler Metal, High Temperature 82Au – 18Ni 1740 °F(949 °c) Solidus-Liquidus Temperature.
1.1 Form:
This specification covers a gold-nickel alloy in the form of wire, rod, sheet, strip, foil, pig, powder, shot, chips. preforms and a viscous mixture (paste) of the powder in a suitable binder.
1.2 Application:
This filler metal has been used typically for joining corrosion and heat resistant steels and alloys where corrosion and oxidation resistant joints with good strength up to 1300 F (704 °C), but usage is not limited to such application. This tiller metal is normally used for brazing, without flux, using a protective atmosphere.
1.3 ClassifIcations:
Filler metal supplied to this specification is classified as follows:
Class 1 Standard composition
Class 2 Supplementary composition control
2. APPLICABLE DOCUMENTS:
The following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order.
4.2.1 Acceptance Tests: All technical requirements, other than shelf life of paste (3.3.3.1), are acceptance tests and shall be performed on each lot.
4.2.2 Periodic Tests: Shelf life of paste (3.3.3.1) 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 in accordance with the following:
4.3.1 Composition: One sample shall be taken from each furnace charge.
4.3.2 Properties Except Shelf Life of Paste: One sample from each lot.
4.3.3 A lot shall be all product, other than powder or paste, which has been tested and found to conform to 3.1, in the same temper and size, and presented for vendor’s inspection at one time.
4.3.4 A lot of powder shall be a uniform blend of powder produced from one or more furnace charges, each meeting the requirements of 3.1, and presented for vendor’s inspection at one time.
4.3.5 A lot of paste shall be that paste produced from a single lot of powder, combined with binder from the same manufacturing batch, and presented for vendor’s inspection at one time.
4.4 Reports:
The vendor of the product shall furnish with each shipment a report showing the results of tests to determine conformance to the composition requirements and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, lot number or numbers, AMS 4787E, form, size, and quantity.
4,5 Resampling and Retesting:
Not applicable.
5. PREPARATION FOR DELIVERY:
5.1 Identification:
5.1.1 Shall be as agreed upon by purchaser and vendor.
5.1.2 Each exterior container or package shall be permanently and legibly marked with not less than AMS 4787E, lot number, form, manufacturer’s identification, nominal sizes, and weight.
5.1.2.1 Each container and package of paste shall also be marked with the date of manufacture.
5.2 Packaging:
5.2.1 The product shall be suitably wrapped, sealed, and boxed or otherwise packaged for protection against injury and contamination dunng shipment and under normal dry storage conditions.
5.2.2 Packages of filler metal shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the filler metal to ensure carrier acceptance and safe delivery.
6. ACKNOWLEDGMENT:
A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders.
7. REJECTIONS:
Filler metal not conforming to this specification or to modifications authorized by purchaser, will be subject to rejection.
8. NOTES:
8.1 The change bar (I) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes. have been made to the previous issue of this specification. An (R) symbol to the left of the document title indicates a complete revision of the specification.
8.2 This filler metal is nominally of eutectic composition, having a liquidus and solidus temperature of approximately 1740 F (949 °C). Brazing temperatures are usually in the range 1800 to 1950 °F (982 to 1066 CC).
8.3 Dimensions in incNpound units and the Fahrenheit temperatures are primary: dimensions in SI units and the Celsius temperatures are shown as approximate equivalents of the primary units and are presented only for information.
8.4 Procurement documents should specify not less than the following:
