SAE AMS 4787F:2000 pdf download

SAE AMS 4787F:2000 pdf download Gold-Nickel Alloy, Brazing Filler Metal, High Temperature 82Au – 18Ni 1740 °F (949 °C) Solidus-Liquidus Temperature
1. sCOPE: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.
1.2Application:
This filler metal has been used typically for joining corrosion and heat resistant steels and alloyswhere corrosion and oxidation resistant joints with good strength up to 1300 °F(704°C), but usageis not limited to such application. This filler metal is normally used for brazing, without flux, using aprotective atmosphere.
1.3 Classifications:
Filler metal supplied to this specification is classified as follows:Class 1 Standard composition
Class 2Supplementary composition control2. APPLICABLE DOCUMENTS:
The following publications form a part of this specification to the extent specified herein. The latestissue of SAE publications shall apply.The applicable issue of other publications shall be the issue ineffect on the date of the purchase order.
2.1 SAE Publications:
Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.
AMS 2222 Tolerances, Copper and Copper Alloy Sheet, Strip, and Plate
MAM 2222 Tolerances, Metric, Copper and Copper Alloy Sheet, Strip, and Plate
AMS 2224 Tolerances, Copper and Copper Alloy Wire
MAM 2224 Tolerances, Metric, Copper and Copper Alloy Wire
2.2 ASTM Publications:
Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.
ASTM B 214 Sieve Analysis of Granular Metal Powders
3. TECHNICAL REQUIREMENTS:
3.1 Composition:
Shall conform to the percentages by weight shown in Table 1, determined by spectrochemical methods or other analytical methods acceptable to purchaser (See 8.6).
3.1.1 Determination not required for routine acceptance.
3.1.2 For Class 2, copper shall be limited to 0.06% maximum, carbon to 0.005% maximum, and the following elements shall be limited to 0.002% maximum each; aluminum, cadmium, lead, magnesium, phosphorus, silicon, titanium, and zinc. The total of these elements shall not exceed 0.05% maximum.
3.2 Condition:
The product shall be supplied in the following condition:
3.2.1 Wire: Clean and bright. Annealed, unless otherwise specified.
3.2.2 Rod: As fabricated and cleaned.
3.2.3 Sheet, Strip, and Foil: Cold rolled, hard.
3.2.4 Pig, Powder, Shot, and Chips: As fabricated.
3.2.5 Paste: Unless otherwise specified by the purchaser, shall consist of 84 to 90% by weight powder in a suitable binder and shall not contain flux.
3.2.6 Preforms: As fabricated.
3.3 Properties:
Filler metal shall conform to the following requirements:
3.3.1 Color: Shall be as follows:
3.3.1.1 Wire, Rod, Sheet, Strip, and Pig: Gold to yellow-white.
3.3.1.2 Powder, Shot, and Chips: Nickel gray.
3.3.2 Flatness: When unrolled, strip and foil shall lie flat with no undue tendency to recoil.
3.3.3 Paste:
3.3.3.1 Paste shall have a shelf life of not less than six months from date of manufacture; not more than thorough mixing shall be required to restore paste for use during that time.