Which is the one that meets or exceeds the other? These bolts are identical with regard to strength and chemistry. There are very minor differences in the hardness requirements, but the proof load, tensile, and yield strength requirements are the same. From a manufacturing standpoint, we make these bolts using the same raw material and the same heat treating and production methods. Our strength by grade chart gives a detailed comparison. The difference between these two specifications A and A is the diameter range, configuration, and application.

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Type 1 fasteners shall be plain carbon steel, carbon boron steel, alloy steel, or alloy boron steels conforming to the requirements.

You can edit the text in this a49, and change where the contact form on the right submits to, by entering edit mode using the modes on the bottom right. The fasteners are intended for general engineering use.

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. Contact Us Use the form on the right to contact us. No other units of measurement are included in this standard. We provide both stocked and custom anchor bolts, anchor bolt assemblies, threaded rod, bolts, bent bolts, nuts, washers, turnbuckles, clevises and more.

Historical Version s — view previous versions of standard. Link to Active This link will always route to the current Active version of the standard. There are other types of A CNC maching, welding, threading. Nuts of other grades and styles having specified proof of load stresses per ASTM A specification greater than the specified grade and style of nut are suitable.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the max range given for the content of alloying elements exceeds one of more of the following limits: Or in which a definite range or minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels.

ASTM does not give any warranty express or implied or make any representation a the contents of this abstract are accurate, complete or up to date. Type 3 fasteners shall be weathering steel and shall conform to one of the chemical compositions specified. Zstm carbon steel, carbon boron steel, alloy steel or alloy boron steel. They are designated by type denoting chemical composition as follows:. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of a standard.

ASTM A All-Thread Studs Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the max range given for the s of alloying elements exceeds one of more of the following limits:. Tensile strength, proof load, hardness tests, and axial tension tests shall be performed to conform with the specified requirements. This specification2 covers quenched and tempered steel hex cap screws, bolts, and studs having a minimum tensile strength.

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