(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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Tension test shall be made to conform to the requirements specified. 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. Standard “as drawn” finish is smooth, Accurate and dark in color. 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.
A Class B Stressproof TG&P | Alro Steel
The results then become an integral atm of the quality assurance program. The bars are furnished in two classes, A and B. Class A are normal-draft cold-drawn and stress-relieved rounds, squares, hexagons, and flats. Link to Active This link will always route to the current Active version of the standard.
Combining values from the two systems may result in nonconformance with the speci? For continuous type of treatment, a lot shall consist of 25 tons [25 Mg] or less aastm the same size of each heat, treated in the same cycle. The stress relieving temperature selection is based on 60 years of experience and thorough documentation.
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. Referenced Documents stresses, and then cooling slowly enough to minimize the development of new residual stresses.
A311 Steel Bar
NOTE 1— A typical ordering description is as follows: One class, B, is cold drawn with higher than normal heavy drafts to provide higher strength levels, and four grades provide improved machinability. Nonmetallic Inclusion Requirements Microscopical S4.
The primary melting may incorporate separate degassing or re? 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.
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.
And, most importantly, help reduce your manufacturing costs. The degree of restriction and the number of elements so restricted are both subject to agreement between the manufacturer and the purchaser.
Workmanship, Finish, and Appearance 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? This specification covers cold-drawn, stress-relieved carbon steel bars subject to mechanical property requirements. Details of these requirements a3311 be agreed upon between the manufacturer and the purchaser.
Materials and Manufacture 6. The yield strength shall be determined at 0. One class, B, is cold drawn with higher than normal heavy drafts to provide higher strength levels, and four grades provide improved machinability.
Routine warpage tests are also conducted throughout the life of the die. To further improve quality, Niagara LaSalle reduced the standard seam depth tolerance for StressProof from 0. Warpage tests are also regularly made as part of a standard quality assurance procedure.
Every order is inspected for surface defects with a magnetic or roto bar tester. 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? Within the text, the SI units are shown in brackets.
The result is a steel bar product that meets stringent standards and provides a wide variety of benefits, including:. Restricted Incidental Elements S2. One warpage test is taken of first bar produced by a new or reground specialty designed drawing die.
The cast or heat analysis shall conform to the chemical composition requirements specified. Resulfurized steels are not subject to inclusion ratings.
A311 Class B Stressproof TG&P
A uniform material which provides exceptional quality for Production, maintenance or special machine parts. Where secondary melting is employed, the heat shall be de? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
An optical comparator test is made of a mold from each new or reground die measuring the internal geometry of z311 die. Parts you are now heat treating from Rc 23 to Rc Within the limits of good manufacturing and inspection practices, the bars shall be free asrm 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.
It covers multiple grades and numerous conditions of stress-relieved cold drawn bars to meet minimum mechanical property requirements. Restricted Cast or Heat Analysis the surface of the material.
The values stated in each system are not exact equivalents, therefore, each system must asstm used independently of the other. Historical Version s – view previous versions of standard. Click below to make an inquiry. 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.
You can rely on Niagara LaSalle for asfm of your steel bar needs. 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. The values stated in each system are not exact equivalents, therefore, each system must be used independently of the other.