SAE AMS 4278B:2003 pdf download

SAE AMS 4278B:2003 pdf download Aluminum Alloy, Alclad Sheet 5.6Zn – 2.5Mg – 1.6Cu – 0.23Cr (Alclad 7075-0) Annealed, Fine Grained
1. SCOPE:
1.1 Form: This specification covers an aluminum alloy in the form of alclad sheet with a fine-grain core of ASTM No. 6 or finer.
1.2 Application: This sheet has been used typically for severely formed structural parts which will be subsequently heat treated and painted or otherwise protected from corrosion, but usage is not limited to such applications.
1.2.1 Certain design and processing procedures may cause this sheet to become susceptible to stress-corrosion cracking after heat treatment; ARP823 recommends practices to minimize such conditions.
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 supplied 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 2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Alloys,Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded Rings
AMS 2772 Heat Treatment of Aluminum Alloy Raw Materials
ARP823 Minimizing Stress-Corrosion Cracking in Wrought Heat-Treatable Aluminum Alloy Products
AS1990 Aluminum Alloy Tempers
2.2 ASTM Publications:
Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or
www.astm.org.
ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products
ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium Products
ASTM E 112 Determining Average Grain Size
2.3 ANSI Publications:
Available from ANSI, 25 West 43rd Street, New York, NY 10036 or www.ansi.org.
ANSI H35.2 Dimensional Tolerances for Aluminum Mill Products
ANSI H35.2M Dimensional Tolerances for Aluminum Mill Products (Metric)
3. TECHNICAL REQUIREMENTS:
3.1 Composition:
Shall conform to the percentages by weight shown in Tables 1 and 2, determined in accordance with AMS 2355.
3.2 Condition:
Annealed in accordance with AMS 2772.
3.3 Properties:
Sheet shall conform to the following requirements, determined in accordance with AMS 2355:
3.3.1 As Annealed:
3.3.1.1 Average Grain Size of Core: Shall be ASTM No. 6 or finer, determined in accordance with ASTM E 112 or by a technique agreed upon by purchaser and vendor.
3.3.1.2 Tensile Properties: Shall be as shown in Table 3.
3.3.1.3 Bending: Sheet shall withstand, without cracking, bending at room temperature through an angle of 180 degrees around a diameter equal to the bend factor shown in Table 4 times the nominal thickness of the sheet with axis of bend parallel to the direction of rolling.