SAE AMS 6382M pdf download
SAE AMS 6382M pdf download.Steel,Bars,Forgings, and Rings 0.95Cr – 0.20Mo (0.38 – 0.43C)(SAE 4140) Annealed.
1.1 Form:
This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, flash welded rings, and stock for forging or flash welded rings.
1.2 Application:
These products have been used typically for parts 0.50 inch (12.7 mm) and under in nominal section thickness at time of heat treatment, requiring a through-hardened steel capable of developing hardness as high as 50 HRC when appropriately heat treated and for parts of greater thickness but requiring proportionately lower hardness, but usage is not limited to such applications.
1.2.1 Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking after heat treatment; ARP 1110 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 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.
Tolerances, Low-Alloy Steel Bars
Tolerances, Metric, Low-Alloy Steel Bars
Chemical Check Analysis Limits. Wrought Low-Alloy and Carbon Steels
Steel Cleanliness, Aircraft Quality Magnetic Particle Inspection Procedure
Steel Cleanliness, Aircraft Quality Magnetic Particle Inspection Procedure, Metric (SI)
Measurement
AMS 2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel, Wrought Products and Forging Stock
AMS 2372 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Forgings
AMS 2806 Identification. Bars, Wire. Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat Resistant Steels and Alloys
AMS 2808 Identification, Forgings
AMS 7496 Rings, Flash Welded, Carbon and Low-Alloy Steels
AS1182 Standard Machining Allowance, Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechanical Tubing
ARP1 110 Minimizing Stress Corrosion Cracking in Wrought Forms of Steels and Corrosion Resistant Steels and Alloys
2.2 ASTM Publications:
Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.
3.3.4.4 Decarburization shall be measured by the metallographic method, by the HR3ON scale hardness testing method, or by a traverse method using microhardness testing in accordance with ASTM E 384. The hardness method(s) shall be conducted on a hardened but untempered specimen protected during heat treatment to prevent changes in surface carbon content. Depth of decarburization, when measured by a hardness method, is defined as the perpendicular distance from the surface to the depth under that surface below which there is no further increase in hardness. Such measurements shall be far enough away from any adjacent surface to be uninfluenced by any decarburization on the adjacent surface. In case of dispute, the depth of decarburization determined using the microhardness traverse method shall govern.
3.3.4.4.1 When determining the depth of decarburizahon, it is permissible to disregard local areas provided the decarburizabon of such areas does not exceed the limits of 3,3.4.3 by more than 0.005 inch (0.13 mm) and the width is 0.065 inch (1.65 mm) or less.
3.4 Quality:
The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign matenals and from imperfections detrimental to usage of the product.
3.4.1 Steel shall be aircraft quality conforming to AMS 2301 or MAM 2301.
3.4.2 Bars ordered hot rolled or cold drawn, or ground, turned, or polished shall, after removal of the standard machining allowance in accordance with AS1182. be free from seams, laps, tears, and cracks open to the ground, turned, or polished surface.
3.4.3 Grain flow of die forgings, except in areas which contain flash-line end grain, shall follow the general contour of the forgings showing no evidence of reentrant grain flow.
3.5 Tolerances:
Bars shall conform to all applicable requirements of AMS 2251 or MAM 2251.
4. QUALITY ASSURANCE PROVISIONS:
4.1 Responsibility for Inspection:
The vendor of the product 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 product conforms to specified requirements.
4,2 Classification of Tests:
4.2.1 Acceptance Tests: Composition (3.1), condition (3.2. macrostructure (3.3.1), average grain size (3.3.2), hardenability (3.3.3), decarburlzation (3.3.4), frequency-severity cleanliness (3.4.1) and tolerances (3.5) are acceptance tests and shall be performed on each heat or lot as applicable.
