ASTM A400-69(2012)
Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties
- Standard No.
- ASTM A400-69(2012)
- Release Date
- 1969
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM A400-17
- Latest
- ASTM A400-23
- Scope
If the desired mechanical properties are as described in 4.1.1 for material identified as Classes P-1 through P-7, or in 4.1.2 for material identified as Classes Q-1 through Q-7, the strength level desired can be based on hardness or the equivalent tensile or yield strength as shown in Tables 1-4. If the desired mechanical properties are as set forth in 4.1.3 for material identified as Classes R-1 through R-6, the strength level is based on yield strength as shown in Tables 5 and 6.
The user, after determining the mechanical property requirements of the critical section (that carrying the greatest stress) of the part, should select the composition or compositions from Tables 1-6 that fulfills these requirements and is most suitable for processing.
1.1 This practice covers 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 1-6. The criteria for placing a steel composition in one of the three general class designations, Classes P, Q, and R (described in Section 4) are as follows:
1.2.1 Classes P and Q should be capable of developing the mechanical properties shown in Tables 1-4 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 5 and 6 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.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
TABLE 1 Steels for Moderately Quenched Parts
(Applicable to oil-quenching or equivalent rate of heat-removal.)Note 18212;Steels listed as approved for a certain section or strength may be used for lighter sections and lower strengths.
Note 28212;Steel composition numbers correspond to SAE, AISI, or ASTM designations. Those in italics are no longer considered standard grades due to decreased usage.
Note 38212;An H-steel with the same grade designation as a standard SAE-AISI steel is capable of meeting the same section and strength requirements as the standard steel (see Specification A304), and is the preferred method of specification.
ASTM A400-69(2012) Referenced Document
- ASTM A108 Standard Specification for Steel Bars, Carbon, Cold-Finished, Standard Quality*， 1999-04-19 Update
- ASTM A304 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements*， 1996-04-19 Update
- ASTM A311/A311M Standard Specification for Cold-Drawn, Stress-Relieved Carbon Steel Bars Subject to Mechanical Property Requirements*， 1995-04-19 Update
- ASTM A322 Standard Specification for Steel Bars, Alloy, Standard Grades*， 1991-04-19 Update
- ASTM A633/A633M Standard Specification for Normalized High-Strength Low-Alloy Structural Steel Plates*， 2024-03-01 Update
- ASTM A675/A675M Standard Specification for Steel Bars, Carbon, Hot-Wrought, Special Quality, Mechanical Properties*， 1990-04-19 Update
ASTM A400-69(2012) history
- 2023 ASTM A400-23 Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties
- 2017 ASTM A400-17 Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties
- 1969 ASTM A400-69(2012) Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties
- 1969 ASTM A400-69(2006) Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties
- 1969 ASTM A400-69(2000) Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties
