ASTM A668 CHEMICAL COMPOSITION PDF

More A Materials shall be forged by hot mechanical work. Except for Class A, all forgings shall be heat treated, depending on class, by the following techniques: annealed, or normalized, or normalized and tempered Classes B, C, D, and G ; normalized and tempered, or double-normalized and tempered Class E ; quenched and tempered, or normalized, quenched, and tempered Classes F ; normalized and tempered Class H ; normalized and tempered, or normalized, quenched, and tempered Class J ; and normalized, quenched, and tempered Classes K, L, M, and N. Steel specimens shall undergo heat and product analyses, and shall conform to required chemical compositions for manganese, phosphorus, and sulfur.

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More A Materials shall be forged by hot mechanical work. Except for Class A, all forgings shall be heat treated, depending on class, by the following techniques: annealed, or normalized, or normalized and tempered Classes B, C, D, and G ; normalized and tempered, or double-normalized and tempered Class E ; quenched and tempered, or normalized, quenched, and tempered Classes F ; normalized and tempered Class H ; normalized and tempered, or normalized, quenched, and tempered Class J ; and normalized, quenched, and tempered Classes K, L, M, and N.

Steel specimens shall undergo heat and product analyses, and shall conform to required chemical compositions for manganese, phosphorus, and sulfur. Steel forgings shall also be tested on their conformance to the following tensile requirements: tensile strength, yield point, yield strength, elongation, reduction of area, and Brinell hardness.

This abstract is a brief summary of the referenced standard. 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.

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

Scope 1. Other ASTM specifications for forgings are available for specific applications such as pressure vessels, railroad use, turbine generators, gearing, and others involving special temperature requirements. These shall apply only when specified by the purchaser. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.

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ASTM A668 Class F Quenched and tempered, or normalized, quenched and tempered

Materials shall be forged by hot mechanical work. Except for Class A, all forgings shall be heat treated, depending on class, by the following techniques: annealed, or normalized, or normalized and tempered Classes B, C, D, and G ; normalized and tempered, or double-normalized and tempered Class E ; quenched and tempered, or normalized, quenched, and tempered Classes F ; normalized and tempered Class H ; normalized and tempered, or normalized, quenched, and tempered Class J ; and normalized, quenched, and tempered Classes K, L, M, and N. Steel specimens shall undergo heat and product analyses, and shall conform to required chemical compositions for manganese, phosphorus, and sulfur. Steel forgings shall also be tested on their conformance to the following tensile requirements: tensile strength, yield point, yield strength, elongation, reduction of area, and Brinell hardness. This abstract is a brief summary of the referenced standard. 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. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

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ASTM A668.PDF

Scope 1. Forgings made to this specification are limited to a maximum weight of lb [ kg]. Tubesheets and hollow cylindrical forgings for pressure vessel shells are not included within the scope of this specification. Although this specification covers some piping components machined from rolled bar and seamless tubular products see , it does not cover raw material produced in these product forms. These shall apply only when specified individually by the purchaser in the order.

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ASTM A668 Class D Normalized, annealed, or normalized and tempered

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. It appears now in its entirety. Scope 1. The values stated in each system are not exactly equivalent; therefore; each system must be used independently of the other. Current edition approved May 10,

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