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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 values stated in each system are not exact equivalents, therefore, each system must be used independently of the other. Click below to make an inquiry. This specification covers cold-drawn, stress-relieved carbon steel bars subject to mechanical property requirements.

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. A uniform material which provides exceptional quality for Production, maintenance or special machine parts. The degree of restriction and the number of elements so restricted are both subject to agreement between the manufacturer and the purchaser. Have questions about your specific products?

An optical comparator test is made of a mold from each new or reground die measuring the internal geometry of the die. Although it also can be induction hardened, it should be watched for quench cracks. The result is a steel bar product that meets stringent standards and provides a wide variety of benefits, including:.

NOTE 2— When turned bars are speci? The stress relieving temperature a3111 is based on 60 years of experience and thorough documentation. One class, B, is cold drawn with higher than normal heavy drafts to provide higher strength levels, and four grades provide improved machinability. Class B are heavy-draft cold-drawn and stress-relieved rounds and hexagons. The steel shall be made by one or more of the following primary processes: The cast or heat analysis shall conform to the chemical composition requirements specified.

It is informational only and not an official part a311 the standard; the full text of the standard itself must be referred to for its use and application. The yield strength xstm be determined at 0.


A311 Steel Bar

Aztm Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Within the limits of good manufacturing and inspection practices, the zstm 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. Warpage tests are also regularly made as part of a standard quality assurance procedure. ASTM does not give any warranty express or implied or make any representation that the contents of this astk are accurate, complete or up to date.

Restricted Cast or Heat Analysis the surface of the material. The bars are furnished in two classes, A and B.

A Class B Stressproof TG&P | Alro Steel

Tension test shall be made to conform to the requirements specified. Ground and Polished with special close tolerances available on order. Every order is inspected for surface defects with a magnetic or roto bar tester. One class, B, is cold drawn with higher than normal heavy drafts to provide higher strength levels, and four grades provide improved machinability.

Seams deeper than that stated above are rejected.

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

Within the text, the SI units are shown in brackets. Within the text, the SI units are shown in brackets.

Workmanship, Finish, and Appearance Standard “as drawn” finish is smooth, Accurate and dark in color. A lot shall consist of bars of the same size qstm the same heat which have been stress relieved a31 the same stationary furnace charge. Combining values from the two systems may result in nonconformance with the specification. Routine warpage tests are also conducted throughout the life of the die. 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.


The 3a11 of high temperature stress relieving to obtain maximum ductility, minimum warpage and excellent machinability is a major part of the original patent. The values stated in each system are not exact equivalents, therefore, each system must be a11 independently of the other. NOTE 1— A typical ordering description s311 as follows: If restraightened, then the same number of tests are again required.

Link to Active This link will always route to the current Active version of the standard. Class A are normal-draft cold-drawn and stress-relieved rounds, squares, hexagons, and flats. Referenced Documents stresses, and then cooling slowly enough to minimize the development of new residual stresses. 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.

If this test indicates stresses are out of specification, the die is not used. Details of these requirements shall be agreed upon between the manufacturer and the purchaser. 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.

Restricted Incidental Elements S2.

A311 Class B Stressproof TG&P

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.

Historical Version s – view previous versions of standard. One warpage test is taken of first bar produced by a new or reground specialty designed drawing die. Parts you are now heat treating from Rc a11 to Rc Mechanical property testing is always the final operation after all processing is completed. The rating of the inclusion count should also be agreed upon and be based upon examination at a magni? Therefore, a warpage test is always performed on the first bar drawn through either a new or reground die.

Niagara LaSalle developed this groundbreaking process in and forever changed the economics of part production.