(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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Link to Active This link will always route to the current Active version of the standard. 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 Cast or Heat Analysis the surface of the material. Workmanship, Finish, and Appearance The area 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.

This specification covers cold-drawn, stress-relieved carbon steel bars subject to mechanical property requirements. Class A are normal-draft cold-drawn and stress-relieved rounds, squares, hexagons, and flats.

To further improve quality, Niagara LaSalle reduced the standard seam depth tolerance for StressProof from 0.

Every order is inspected for surface defects with a magnetic or a11 bar tester. And, most importantly, help reduce your manufacturing costs.

The rating of the inclusion count should also be agreed upon and be based upon examination at a magni? The heavy draft stress-relieved Class B came into existence with the release of the specification. Nonmetallic Inclusion Requirements Microscopical S4. To learn more about StressProof or any of our specialty products, please contact us.


Referenced Documents stresses, and then cooling slowly enough to minimize the development of new residual stresses. The importance of high temperature stress relieving to obtain maximum ductility, minimum warpage and excellent machinability is a major part of the original patent.


This was followed by the highest temperature stress aa311 treatment possible to obtain a combination of properties, including strength, wear resistance, minimum warpage and excellent machinability. Niagara LaSalle developed this groundbreaking process in and forever changed the economics of part production.

Within the text, the SI units are shown in brackets. If restraightened, then the same number of tests are again required. It covers multiple grades and numerous conditions of stress-relieved cold drawn bars to meet minimum mechanical property requirements.

You can rely on Niagara LaSalle for all of your steel bar needs. The result is a steel bar product that meets stringent standards and provides a wide variety of benefits, including:. Parts you are now aa311 treating from Rc 23 to Ast, A lot shall consist of bars of the same size from the same heat which have been stress relieved in the same stationary furnace charge.

Routine warpage tests are also conducted throughout the life of the die.

A Steel Bar | Capital Steel & Wire

A uniform material which provides exceptional quality for Production, maintenance or special machine parts. The steel shall be made by one or more of the following primary processes: The values stated in each system are not exact equivalents, therefore, each system must be used independently of the other.

Combining values from the two systems may result in nonconformance with the specification. 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. One class, B, is cold drawn with higher than normal heavy drafts to provide higher strength levels, and four grades provide improved machinability. Tension test shall be made to conform to the requirements specified.


Class B are heavy-draft cold-drawn and stress-relieved rounds and hexagons. Although it also can be induction hardened, it should be watched for quench cracks.

Have questions about your specific products? NOTE 2— When turned bars are speci? 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. The degree of restriction and the number of elements so restricted are both subject to agreement between the manufacturer and the purchaser.

The yield strength shall be determined at 0. The 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. Details of these requirements shall be agreed upon between the manufacturer and the purchaser. The bars are furnished in two classes, A and B. Historical Version s – view previous versions of standard. Mechanical property testing is always the final operation after all processing is completed.

The results then become an integral part of the quality assurance program. Warpage tests are also regularly made as part of a standard quality assurance procedure. Click below to make an inquiry.