SAE AMS 6477A:2001 pdf download

SAE AMS 6477A:2001 pdf download Steel, Bars, Forgings, and Tubing 0.80Cr (0.90 – 1.03C) For Bearing Applications
1. SCOPE:
1.1 Form: This specification covers a low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
1.2 Application: These products have been used typically for bearing components requiring a through-hardening steel usually with hardness of approximately 60 HRC and section thickness under 0.50 inch (12.7 mm), 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 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 2251 Tolerances, Low-Alloy Steel Bars
MAM 2251 Tolerances, Metric, Low-Alloy Steel Bars
AMS 2253 Tolerances, Carbon and Alloy Steel Tubing
MAM 2253 Tolerances, Metric, Carbon and Alloy Steel Tubing
AMS 2259 Chemical Check Analysis Limits, Wrought Low-Alloy and Carbon Steels
2.1 (Continued):
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 Heat and Corrosion Resistant Steels and Alloys
AMS 2808 Identification, Forgings
2.2 ASTM Publications:
Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.
ASTM A 370 Mechanical Testing of Steel Products
ASTM E 45 Determining the Inclusion Content of Steels
ASTM E 350 Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought Iron
ASTM E 381 Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
ASTM E 384 Microindentation Hardness of Materials
3. TECHNICAL REQUIREMENTS:
3.1 Composition:
Shall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E 350 or by spectrochemical or other analytical methods acceptable to purchaser.
3.1.1 Check Analysis: Composition variations shall meet the applicable requirements of AMS 2259.
3.2.2 Forgings: As ordered.
3.2.3 Mechanical Tubing: Cold finished and annealed, unless otherwise ordered, with microstructure of spheroidized cementite in ferrite matrix. Tubing ordered hot finished and annealed shall have hardness not higher than 95 HRB, or equivalent (See 8.3).
3.2.4 Forging Stock: As ordered by the forging manufacturer.
3.3 Properties:
The product shall conform to the following requirements; hardness testing shall be performed in accordance with ASTM A 370:
3.3.1 Macrostructure: Visual examination of transverse full cross-sections from bars, billets, tube rounds, or forging stock, etched in hot hydrochloric acid in accordance with ASTM E 381, shall show no pipe or cracks. Porosity, segregation, inclusions, and other imperfections shall be no worse than the macrographs of ASTM E 381 agreed upon by purchaser and vendor.