ASTM-A400 2000

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A400-69(2000) Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties

Published By	Publication Date	Number of Pages
ASTM	2000	9

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Categories: 77.140.60 - Steel bars and rods, ASTM

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Description

ASTM A400-69-Reapproved2000

Historical Standard: Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties

ASTM A400

Scope

1.1 This practice is intended as a guide for the selection of steel bars according to section and to the mechanical properties desired in the part to be produced. This is not a specification for the procurement of steel. Applicable procurement specifications are listed in Section 5.

1.2 Several steel compositions intended for various sections and mechanical property requirements are presented in Tables 2 to 7. The criteria for placing a steel composition in one of the three general class designations, Classes P, Q, and R (described in Section 3) are as follows:

1.2.1 Classes P and Q should be capable of developing the mechanical properties shown in Tables 2 to 5 by liquid quenching from a suitable austenitizing temperature, and tempering at 800°F (427°C) or higher. A hardness indicated by tests made at a location shown in Fig. 1, A, B, or C, is taken as evidence that a composition is capable of meeting other equivalent mechanical properties shown in the tables. Normal good shop practices are assumed, with control of austenitizing and tempering temperatures, and mild agitation of the part in the quenching bath.

1.2.2 Class R should be capable of developing the mechanical properties shown in Tables 6 and 7 as hot rolled, by cold drawing, or by cold drawing with additional thermal treatment. The locations for obtaining tension tests are described in 6.2.

1.3 It is not implied that the compositions listed in the tables are the only ones satisfactory for a certain class and mechanical property requirement. Steels with lower alloy contents are often satisfactory through the use of special processing techniques.

Keywords

Steel bars-general; selection guide according to composition/mechanical properties,; practice

ICS Code

ICS Number Code 77.140.60 (Steel bars and rods)

DOI: 10.1520/A0400-69R00

Additional information

Standard Title	A400-69(2000) Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties
Published Code	ASTM
Publication Date	2000
Pages Count	9
ICS Codes	77.140.60 - Steel bars and rods