SAE AMS 4141E pdf download

SAE AMS 4141E pdf download.Aluminum Alloy Die Forgings 5.6Zn – 2.5Mg – 1.6Cu – 0.23Cr (7075-T73)Solution and Precipitation Heat Treated.
1.1 Form:
This specification covers an aluminum alloy in the form of die forgings and forging stock ordered to inch/pound units.
1.1.1 MAM 4141 A is the metric version of this AMS.
1.2 Application:
These forgings have been used typically for parts requiring good resistance to stress-corrosion cracking but with lower strength than AMS 4139, 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 form 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 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 Material
AMS 2808 Identification, Forgings
3.3.1.2 Stress-Corrosion Resistance: Forgings shall meet the conductivity test of 3.3.1.2.1 or shall exhibit no evidence of stress-corrosion cracking when tested in accordance with 3.3.1.2.2. The test of 3.3.1.2.2 need not be performed on forgings meeting the requirements of 3.3.1.2.1.1. 3.3.1.2.1.2. and 3.3.1.2.1.3.
3.3.1.2.1 Conductivity: Shall be as follows, determined on the surface of the sample:
3.3.1.2.1.1 If the conductivity is 40.0% IACS (International Annealed Copper Standard) or higher and longitudinal (with grain flow) tensile properties meet specified requirements, the forgings are acceptable.
3.3.1.2.1.2 lIthe conductivity is between 38.0 to 39.9% IACS. inclusive, if the longitudinal (with grain flow) tensile properties meet specified properties, and if the longitudinal yield strength does not exceed the specified minimum by more than 11.9 ksi. the forgings are acceptable.
3.3.1.2.1.3 If the conductivity is between 38.0 to 39.9% IACS, Inclusive, and longitudinal (with grain flow) yield strength exceeds the specified minimum value by more than 11.9 ksi, the forgings shall be given additional precipitation heat treatment. If, after such treatment, the forgings meet the requirements of 3.3.1.2 and 3.3.1.2.1.1 or 3.3.1 .2.1.2, the torgings are acceptable.
3.3.1.2.1.4 lIthe conductivity is below 38.0% lAGS, the forgings are not acceptable but may be re-heat treated or given additional precipitation heat treatment to meet the specified requirements.
3.3.1.2.2 Stress-Corrosion Cracking Resistance: Specimens, cut from forgings 0.750 inch and over in nominal thickness, shall exhibit no evidence of stress-corrosion cracking when stressed in the short-transverse (across grain flow) direction to 75% of the specified minimum longitudinal (with grain flow) yield strength.
3.3.2 Forging Stock: When a sample of stock is forged to a test coupon. with a degree of mechanical working not greater than that of the forgings, and heat treated in the same manner as forgings, tensile specimens taken from the heat treated coupon shall conform to the requirements of
3.3.1.1.1. It specimens taken from the stock after heat treatment in the same manner asforgings conform to the requirements of 3.3.1.1.1, the tests shall be accepted as equivalent to tests of a forged coupon.
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 Forgings shall be etched to produce a surface suitable for visual inspection of the forging surfaces. Surfaces shall be evaluated for defects such as seams, laps, bursts, and quench cracks. Surface imperfections which can be removed so that they do not reappear on re-etching and the required section thickness can be maintained are acceptable.
3.4.1.1 When specified. a sampling plan may be used in lieu of etching each forging.
3.4.2 When specified, die forgings shall be ultrasonically inspected in accordance with
ASTM B 594 or other method acceptable to purchaser and shall meet Class B requirements.
3.4.3 When specified. forgings shall be subjected to fluorescent penetrant inspection In accordance with ASTM E 1417 or other method acceptable to purchaser. Standards for acceptance shall be established by the cognizant engineering organization.
3.4.4 Grain flow of die lorgings. except In areas which contain flash-line end grain, shall follow the
general contour of the forgings showing no evidence of re-entrant grain flow.
3.5 Tolerances:
Forging stock shall conform to all applicable requirements of ANSI H35.2.
4. QUALITY ASSURANCE PROVISIONS:
4.1 Responsibility br Inspection:
The vendor of the product shall supp’y all samples for vendor’s 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 the specified requirements.