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(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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The result is a steel bar product that meets stringent standards and provides a wide variety of benefits, including:. The yield strength shall be determined at 0.

The results then become an integral part of the quality assurance program. The importance of high temperature stress relieving to obtain maximum ductility, minimum warpage and excellent machinability is astj major part of the original patent.

The bars are furnished in two classes, A and B. This specification covers cold-drawn, stress-relieved carbon steel bars subject to mechanical property requirements.

A311 Steel Bar

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. Within the text, the SI units are shown in brackets. Referenced Documents stresses, and then cooling slowly enough to minimize the development of new satm stresses. Details of these requirements shall be agreed upon between the manufacturer and the purchaser.

The degree of restriction and the number of elements so restricted are both subject to agreement between the manufacturer and the purchaser. W311 learn more about StressProof or any of our specialty products, please contact us. Ground and Polished with special close tolerances available on order.


Combining values from the two systems may result in nonconformance with the specification. Within the limits of good manufacturing and inspection practices, 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 the material in machining or fabrication of suitable parts.

The steel shall be made by one or more of the following primary processes: Every order is inspected for surface defects with a magnetic or roto bar tester. Historical Version s – view previous versions of standard.

Niagara Lasalle Steel Products – Stressproof ®, ASTM A, Cold Rolled Steel Round Rod

Mechanical astj testing is always the final operation after all processing is completed. The primary melting may incorporate asttm degassing or re? A uniform material which provides exceptional quality for Production, maintenance or special machine parts.

Warpage tests are also regularly made as part of a standard quality assurance procedure. This abstract is a brief summary of the referenced standard.

You can rely on Niagara LaSalle for all of your steel bar needs. Restricted Cast or Heat Analysis the surface of the material. The values stated in each system are not exact equivalents, therefore, each system must be used independently of the other.

ASTM A311 Grade 1117 cold-drawn, stress relieved, annealed bar

Materials and Manufacture 6. Combining values from the two systems may result in nonconformance with the speci? Workmanship, Finish, and Appearance If restraightened, then the same number of tests are again required.

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.

The report shall aztm 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. 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. The heavy draft stress-relieved Class B came into existence with the release of the specification.


The stress relieving temperature selection is based on 60 years of experience and thorough documentation. Restricted Incidental Elements S2. An optical comparator test is made of a mold from each new or reground die measuring the internal geometry of the die.

Resulfurized steels are not subject to inclusion ratings. Seams deeper than this are rejectable.

If this test indicates stresses are out of specification, the die is not used. Within the text, the SI units are shown in brackets.

And, most importantly, help reduce your manufacturing costs. One class, B, is cold drawn with higher than normal heavy drafts to provide higher strength levels, and four grades provide asm machinability. Nonmetallic Inclusion Requirements Microscopical S4. 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.

Parts you are now heat treating from Rc 23 to Rc Where secondary melting is employed, the heat shall be de? Therefore, a warpage test is always performed on the first bar drawn through either a new or reground die. Have questions about your specific products?