SAE AMS 4081H pdf download
SAE AMS 4081H pdf download.Aluminum Alloy Tubing, Hydraulic,Seamless,Drawn,Round 1.OMg – 0.6oSi – o.28cu – 0.20Cr (6061-T4) Solution Heat Treated and Naturally Aged.
1,1 Form:
This specification covers an aluminum alloy in the form of seamless, round tubing. 1 .2 Application:
This tubing has been used typically for aircraft hydraulic systems and fuel and oil lines to be formed in the solution heat treated condition and subsequently precipitation heat treated, but usage is not limited to such applications.
2. APPLICABLE DOCUMENTS:
The issue of the followin9 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 2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Alloys, Wrought Products, Except Forging Stock, and Rolled, Forged. or Flash Welded Rings
MAM 2355 Quality Assurance Sampling and Testing. Aluminum Alloys and Magnesium Alloys, Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded Rings, Metric (SI) Units
AMS 2772 Heat Treatment of Aluminum Alloy Raw Materials
3.4 Quahty:
Tubing. 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 tubing.
3,4.1 Microexamination: A polished and etched cross-section of a tube from each lot shall show no evidence of cracks, seams, or folds when examined at 100X magnification.
3.4.2 Detrimental imperfections include, but are not limited to. cracks, splits, seams, inclusions, or severe cross-hatching (surface breaks) that cannot be removed by light hand sanding, using 180 grit or finer sandpaper.
3.4.3 Leak Test: Each length of tubing shall be tested for leaks in accordance with either 3.4.3.1 or
3.4.3.2; the method of test shall be at the option of the vendor unless purchaser specifies the method of test.
3.4.3.1 Immersion Test: A tube, immersed in water or other suitable liquid while an air pressure of
250 psi (1724 kPa) is applied to the inside of the tube and held for not less than five seconds, shall show no leakage as indicated by bubbles in the immersion fluid.
3.4.3.2 Eddy Current Test: Secondary reference standards in accordance with ASTM E 215 shall be used to set threshold levels. Tubes exhibiting eddy current responses equivalent to or smaller than those obtained from the da holes are acceptable. Tubes exhibiting eddy current responses equivalent to or greater than those obtained from the db holes in the reference standard are not acceptable.
3.4.4 Prior to use, tubing should be cleaned and chemically film treated to increase the corrosion resistance. Metallic flakes or particles shall not be collected by a clean white cloth drawn through the length of the bo’e of a test sample. Discoloration of the cloth without the presence of flakes or particles is acceptable.
3,5 Tolerances:
Tubing shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M.
4. QUALITY ASSURANCE PROVISIONS:
4,1 Responsibility for Inspection:
The vendor of tubing shall supply 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 tubing conforms to the specified requirements.
4.2 Classification of Tests:
4.2.1 Acceptance Tests: Composition (3.1), tensile properties as solution heat treated (3.3.1 .1), flarability (3.3.1.3), microexamination (3.4.1), leak determination (3.4.3), and tolerances (3.5) are acceptance tests and, except for composition, shall be performed on each lot.
4,2.2 Periodic Tests: Flattening (3.3.1 .2), hydrauc strength (3.3.1.4), and tensile properties after precipitation heat treatment (3.3.2) are periodic tests 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 AMS 2355 or MAM 2355 and the following:
4.3.1 Specimens for flarability test (3.3.1.3) shall be full tubes or sections Cut from a tube. The end of the specimen to be flared shall be cut square, with the cut end smooth and free from burrs but, not rounded.
