ASTM Da. ASTM Aa. ASTM A Designation: A — 07a Standard Speci?
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ASTM Da. ASTM Aa. ASTM A Designation: A — 07a Standard Speci? A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense. Any alloy steel capable of meeting the minimum mechanical and chemical properties set forth in this speci?
NOTE 1—For bolts, studs, or other externally threaded fasteners, to be used at elevated temperatures, refer to Speci? Grade of Fastener and Surface Finish BC, plain or with a coating of insufficient thickness to require over-tapped nuts BC, zinc-coated or with a coating thickness requiring over-tapped nuts BD, all?
Selection will depend upon design and the stresses and service for which the product is to be used. NOTE 2—Quenched and tempered alloy steel bolts for structural steel joints up through 11? Alloy steel bolts, studs, and other externally threaded fasteners that is, heavy hex-structural bolts over 11? When bolts of Grade BD of this speci?
Referenced Documents 2. Unless otherwise speci? Current edition approved Dec. Published January Originally approved in Last previous edition approved in as A — Ordering Information 3.
Materials and Manufacture 4. At the option of the manufacturer, heat treatment may be performed on the raw material, during the manufacturing operations, or after? Heat treatment shall consist of quenching in a liquid medium except Grade BD sizes 11? Application of such a lubricant to nuts and a test of the lubricant efficiency are provided in Supplementary Requirement S1 of Speci?
NOTE 4—Research conducted on bolts of similar material and manufacture indicates that hydrogen-stress cracking or stress cracking corrosion may occur on hot-dip galvanized Grade BD bolts. Chemical Composition 5.
The steel shall contain sufficient alloying elements to qualify it as an alloy steel. NOTE 5—Steel is considered to be alloy, by the American Iron and Steel Institute, when the maximum of the range given for the content of alloying elements exceeds one or more of the following limits: manganese, 1.
The chemical composition thus determined shall conform to the requirements given in Table 1. For sizes larger than 11? Mechanical Properties 6. Fasteners less than three diameters in length and studs less than four diameters in length shall have hardness values not less than the minimum nor more than the maximum hardness limits required in Table 2, as hardness is the only requirement.
When equipment of sufficient capacity for full-size testing is not available, or when the length of the fastener makes full-size testing impractical, machined specimens shall be tested and shall conform to the requirements in accordance with Table 4. In the event that fasteners are tested by both full-size and by the machined test specimen methods, the full-size test shall govern if a controversy between the two methods exists.
Dimensions 7. Grade Brinell Minimum? After zinc coating, the maximum limit of pitch and major diameter may exceed the Class 2A limit by the following amount: Diameter, in. Workmanship 8. Number of Tests 9. For such a plan to be fully effective it is essential that secondary processors, distributors, and purchasers maintain the identi? The manufacturer, secondary processors, and distributors shall identify and maintain the integrity of each lot of fasteners from raw-material selection through all processing operations and treatments to?
Each lot shall be assigned its own lot-identi? The identity of the lot is maintained throughout all subsequent operations and packaging. Threads per inch Stress Area,A in. Based on psi for sizes 1? C Based on psi for sizes 1? D Based on psi for sizes 1?
E Based on psi for sizes 1? F Based on psi for sizes 1? G Based on psi for sizes 1? All tests and inspections required by the speci? Responsibility Rejection and Rehearing Rejection should be reported to the producer or supplier promptly and in writing.
In case of dissatisfaction with the results of the test, the producer or supplier may make claim for a rehearing. Product Marking Test Methods Fracture shall be in the body or threads of the bolt without any fracture at the junction of the head and body.
Inspection The two identi? Packaging and Package Marking Keywords Marking S1. Consult the producer for the minimum size that can be marked. Approved Dec. Committee F16 has identi? C, to Speci? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
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Historical Version s - view previous versions of standard. More F This specification covers the chemical and mechanical requirements of quenched and tempered alloy steel bolts, studs, and other externally threaded fasteners. All fasteners shall be made from alloy steel conforming to the chemical composition requirements. Selection will depend upon design and the stresses and service for which the product is to be used.
ASTM A354 Grade BD Bolts, Fasteners