ASTM A29/A29M-11 pdf free.Sandard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for.
This specification covers a group of common requirements which, unless otherwise specified in the purchase order or in an individual specification, shall apply to carbon and alloy steel bars under each of the following ASTM specifications.
4. Chemical Composition
4.1 Limits.
4..I The chemical composition shall conform to the requirements specified in the purchase order or the individual product specifications. For convenience the grades commonly specified for carbon steel bars are shown in Tables I and 2 ars may be ordered to these grade designations and when so ordered shall conform to the specified limits by heat analysis.
4.1.2 When compositions other than those shown in Tables I and 2 are required, the composition limits shall be prepared using the ranges and limits shown in Table 3 for carbon steel and Table 4 for alloy steel.
4.2 Heat or Cast Analysis
4.2.1 The chemical composition of each heat or cast shall be determined by the manufacturer in accordance with Test Methods, Practices, and Terminology A751.
4.2.2 The heat or cast analysis shall conform to the require ments specified in the product specification or purchase order These can be the heat chemical range and limit for a grade designated in Tables 1 and 2, or another range and limit in accordance with 4.1.2, or with requirements of the product specIncation.
4.3 Product Analysis
4.3.1 Merchant quality carbon bar steel is not subject to rejection for product analysis unless misapplication of a heat is clearly indicated.
4.3.2 Analyses may be made by the purchaser from finished bars other than merchant quality representing each heat of open-hearth, basic-oxygen, or electric-furnace steel. The chemical composition thus determined shall not vary from the limits specified in the applicable specification by more than the amounts prescribed in Table 5 and Table 6, but the several Determinations of any element, excluding lead, in a heat may not vary both above and below the specified range. Rimmed or capped steel is characterized by a lack of homogeneity in its composition, especially for the elements carbon, phosphorus, and sulfur; therefore, when rimmed or capped steel is specified or required, the limitations for these elements shall not be applicable. Because of the degree to which phosphorus and sulfur segregate the limitations for these elements shall not be applicable to rephosphorized or resulfurized steels.