(Identical to ASTM Specification A /A M (R) except for deletion of , revision of Table 1 footnote A, and editorial corrections to Table 2.) 1. A Class B Stressproof TG&P Cold Finished Bar Round Turned Ground Polished, A Round Bar, A Rod, A TG&P Rod, A TG&P Round Rod . See the chemical composition and physical properties of ASTM A Grade cold-drawn, stress relieved, annealed bar, find alternative materials, and.
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Have questions about your specific products? This specification covers cold-drawn, stress-relieved carbon steel bars subject to mechanical property requirements.
Warpage tests are also regularly made as part of a standard quality assurance procedure. Nonmetallic Inclusion Requirements Microscopical S4. Seams deeper than that stated above are rejected. Where secondary melting is employed, the heat shall be a311 NOTE 2— When turned bars are speci?
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Within the text, the SI units are shown in brackets.
A3111 report shall include the name of the manufacturer, ASTM designation and year date and revision letter, if any, class and grade, heat number, size, and grain size if requested. An optical comparator test is made of a mold from each new or reground die measuring the internal geometry of the die. Standard “as drawn” finish is smooth, Accurate and dark in color. If this test indicates stresses are out of specification, the die is not used. Combining values from the two systems may result in nonconformance with the speci?
The rating of the inclusion count should also be agreed upon and be based upon examination at a magni? The cast or heat analysis shall conform to the chemical composition requirements specified. Routine warpage tests are also conducted throughout the life of the die. This abstract is a brief summary of the referenced standard. For continuous asm of treatment, a lot shall consist of 25 tons [25 Mg] or less of the same size of each heat, treated in the same cycle.
A Steel Bar | Capital Steel & Wire
The stress relieving temperature selection is based on 60 years of experience and thorough documentation. Combining values from the two systems may result in nonconformance with the specification.
The bars are furnished in two classes, A and B. Historical Version s – view previous versions of standard. Materials and Manufacture 6. Restricted Cast or Heat Analysis the surface of the material.
Within the text, the SI units are shown in brackets.
Niagara Lasalle Steel Products – Stressproof ®, ASTM A, Cold Rolled Steel Round Rod
Link to Active This link will always route to the current Active version of the standard. The yield strength shall be determined at 0. To further improve quality, Niagara LaSalle reduced the standard seam depth tolerance for StressProof from 0. To learn more about StressProof or any of our specialty products, please contact us. Maximum seam depth of 0. Workmanship, Finish, and Appearance The importance of high temperature stress relieving to obtain maximum ductility, minimum warpage and excellent machinability is a major part of the original patent.
Niagara LaSalle is exceptionally responsive to the needs of our customers and puts a high priority on providing uniformity in the machinability of our products in order to improve productivity for you.
Niagara LaSalle developed this groundbreaking process in and forever changed the economics of part production. Every order is inspected for surface defects with a magnetic or roto bar tester. Referenced Documents purchase separately The documents listed below are referenced within the subject asfm but are not provided as part of the standard.
Tension test shall be made to conform to the requirements specified. The a31 of the sample to be examined should be agreed upon between the purchaser and the manufacturer, and the test specimen should be hardened by heating and quenched before being polished to avoid pits. The result is a steel bar product that meets stringent standards and provides a wide variety of benefits, including:.
You can rely on Niagara LaSalle for all of your steel bar needs. This was followed by the highest temperature stress relieving treatment possible to obtain a combination of properties, including strength, wear resistance, minimum warpage and excellent machinability. In this modern age, uniformity in the machinability of a product is a crucial factor in improved productivity, and we not only met this critical need, but exceeded expectations. Restricted Incidental Elements S2. Although it also can be induction hardened, it should be watched for quench cracks.
Parts you are now heat treating from Rc 23 to Rc If restraightened, then the same number of tests are again required. The results then become an integral part of the quality assurance program. A uniform material which provides exceptional quality for Production, maintenance or special machine parts.
NOTE 1— A typical ordering description is as follows: Class B are heavy-draft cold-drawn and stress-relieved rounds and hexagons. It covers multiple grades and numerous conditions of stress-relieved cold drawn bars to meet minimum mechanical property requirements.
Class A are normal-draft cold-drawn and stress-relieved rounds, squares, hexagons, and flats. The steel shall be made by one or more of the following primary processes: Within the limits of good manufacturing and inspection practices, the bars shall be free of injurious seams, laps, segregation, or other atm that, due to their nature, degree, or extent, will aetm with the use of the material in machining or fabrication of suitable parts.
Therefore, a warpage test is always performed on the first bar drawn through either a new or reground die.