(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.
The results then become an integral part of the quality assurance program.
The report shall include the name of the manufacturer, ASTM a31 and year date and revision letter, if any, class and grade, heat number, size, and grain size if requested. 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. Class A are normal-draft cold-drawn and stress-relieved rounds, squares, hexagons, and flats.
The cast or heat analysis shall conform to the chemical composition requirements specified. Restricted Cast or Heat Analysis the surface of the material.
The values stated in each system are aetm exact aetm, therefore, each system must be used independently of the other. Workmanship, Finish, and Appearance An optical comparator test is made of a mold from each new or reground die measuring the internal geometry of the die.
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.
Tension test shall be made to conform to the requirements specified. The importance of high temperature stress relieving to obtain maximum ductility, minimum warpage and excellent machinability is a major part of the original patent. Within the limits of good manufacturing and inspection aztm, the bars shall be free of injurious seams, laps, segregation, or other imperfections that, due to their nature, degree, or extent, will interfere with the use of asfm material in machining or fabrication of suitable parts.
Where secondary melting is employed, the heat shall be de?
Details of these requirements shall be agreed upon between the manufacturer and the purchaser. To further improve quality, Niagara LaSalle reduced the standard seam depth tolerance for StressProof from 0. One class, B, is cold drawn with higher than normal heavy drafts to provide higher strength levels, and four grades provide improved machinability.
This specification covers cold-drawn, stress-relieved carbon steel bars subject to mechanical property requirements. Click below to make an inquiry. One class, B, is cold drawn with higher than normal heavy drafts to provide higher strength levels, and four grades provide improved machinability. The steel shall be made by one or more of the following primary processes: Historical Version s – view previous versions of standard. Ground and Polished with special close tolerances available on order.
And, most importantly, help reduce your manufacturing costs.
A Class B Stressproof TG&P | Alro Steel
The rating of the inclusion count should also be agreed upon and be based upon examination at a magni? This abstract is a brief summary of the referenced standard. To learn more about StressProof or any of our specialty products, please contact us. A3311 stress relieving temperature selection is based on 60 years of experience and thorough documentation. A lot shall consist of bars of the sstm size from the same heat which have been stress relieved in the same stationary furnace charge. For continuous type 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.
Niagara Lasalle Steel Products – Stressproof ®, ASTM A, Cold Rolled Steel Round Rod
The yield strength shall be determined at 0. 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. Restricted Incidental Elements S2. If this test indicates stresses are out of specification, the die is not used.
Nonmetallic Inclusion Requirements Microscopical S4. Materials and Manufacture 6. Within the text, the SI units are shown in brackets. Mechanical property testing is always the final operation after all processing is completed.
Although it also can be induction hardened, it should be watched for quench cracks.
Link to Active This link will always route to the current Active version of the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
Have questions about your specific products? In this modern age, uniformity in the machinability of a product is a crucial factor in improved productivity, and we aatm only met this critical need, but exceeded expectations. Warpage tests are also regularly made as part of a standard quality assurance procedure. The primary melting may incorporate separate degassing or re? Class B are heavy-draft cold-drawn and stress-relieved rounds and hexagons.
One warpage test is taken of first bar produced by a new or reground specialty designed drawing die. If restraightened, then the same number of tests are again required. Resulfurized steels are not subject to inclusion ratings. Niagara LaSalle developed axtm groundbreaking process in and forever changed the economics of part production.
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