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Standard Specification for Steel Bars, Microalloy, Hot-Wrought, Special Quality, for Subsequent Hot Forging
Automaticky přeložený název:
Standardní specifikace pro ocelové tyče, Microalloy, Hot kované, zvláštní jakosti, za účelem následného Kovací
NORMA vydána dne 1.4.2011
Označení normy: ASTM A921/A921M-93(2011)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.4.2011
Kód zboží: NS-4814
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
carbon steel bars, microalloyed steel, steel bars, Microalloy steel--specifications, Steel forgings--specifications, Carbon steel bars/shapes--specifications, Hot wrought steel bars--specifications, ICS Number Code 77.140.20 (Steels of high quality)
1. Scope | ||||||||
1.1 This specification covers hot-wrought, special quality microalloyed carbon steel bars intended for use as hot forging stock. The bars shall be hot-wrought, as-wrought, unless thermal treatment is necessary to ensure cold shearability. 1.2 The bars shall be furnished to chemical composition only. Chemical composition is based on standard carbon steel grades modified to include microalloying elements such as columbium (niobium), vanadium, or molybdenum. Desired mechanical properties are developed in the subsequent hot forging and controlled cooling operations. 1.3 Sections and sizes of bar steel available are covered in Specification A29/A29M. 1.4 Supplementary requirements S1 to S6 are provided for use when additional controls or requirements are desired. These shall apply only when specified on the purchase order. 1.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text and tables, SI units are shown in brackets. 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. 1.6 Unless the order specifies the applicable “M” specification designation, the material shall be furnished to the inch-pound units. |
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2. Referenced Documents | ||||||||
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