Home>ASTM Standards>ASTM B776-12(R2019) pdf free download

ASTM B776-12(R2019) pdf free download

ASTM B776-12(R2019) pdf free download.Standard Specification for Hafnium and Hafnium Alloy Strip, Sheet, and Plate
1. Scope
1.1 This specification covers two grades of wrought haf- nium and hafnium alloy strip, sheet, and plate as follows: 1.1.1 Grade R1 for nuclear applications, and 1.1.2 Grade R3 for commercial applications. 1.2 Unless a single unit is used, for example corrosion mass gain in mg/dm 2 , the values stated in either inch-pound or SI units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. SI values cannot be mixed with inch-pound values. 1.3 The following precautionary caveat pertains only to the test method portions of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility ofthe user ofthis standard to establish appropriate safety, health, and environ- mental practices and determine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Lot Definition: 3.1.1 lot, n—a lot shall consist ofa material ofthe same size, shape, condition, and finish produced from the same ingot by the same reduction schedule and the same heat treatment parameters. Unless otherwise agreed upon between manufac- turer and purchaser, a lot shall be limited to the product of an 8-h period for final continuous anneal, or to a single furnace load for final batch anneal. 3.2 Forms: 3.2.1 strip, n—a flat product, may be supplied in coil, less than 6 in. (150 mm) in width and from 0.005 to 0.188 in. (0.13 to 4.8 mm) in thickness. 3.2.2 sheet, n—a flat product 6 in. (150 mm) or more in width and from 0.005 to 0.188 in. (0.13 to 4.8 mm) in thickness. 3.2.3 plate, n—a flat product more than 0.125 in. (3.2 mm) in thickness.
6. Materials and Manufacture
6.1 Material covered by this specification shall be made from ingots that are produced by vacuum or plasma arc melting, vacuum electron-beam melting, a combination of these three methods, or other melting processes conventionally used for reactive metals. All processes to be done in furnaces usually used for reactive metals. 6.2 The various mill products covered by this specification shall be formed with the conventional extrusion, forging, or rolling equipment normally found in primary ferrous and nonferrous plants. 6.3 The sheet, strip, and plate shall be supplied in the recrystallized annealed condition unless otherwise specified in the purchase order.
7. Chemical Composition
7.1 The grades of R1 and R3 metal covered by this specification shall conform to the chemical composition re- quirements prescribed in Table 1. 7.1.1 The elements listed in Table 1 are intentional alloy additions or elements which are inherent to the manufacture of sponge, ingot, or mill product. Elements other than those listed in Table 1 are deemed to be capable of occurring in the grades listed in Table 1 by and only by way ofunregulated or unanalyzed scrap additions to the ingot melt. Therefore, product analysis for elements not listed in Table 1 shall not be required unless specified and shall be considered to be in excess of the intent of this specification. 7.1.2 Elements intentionally added to the melt must be identified, analyzed, and reported in the chemical analysis. 7.1.3 When agreed upon by producer and purchaser and requested by the purchaser in his written purchase order, chemical analysis shall be completed for specific residual elements not listed in this specification. 7.2 The manufacturer’s ingot analysis shall be considered the chemical analysis, except for certain cases where tests on product are required, as specified in 14.1.1. 7.2.1 The ingot shall be sampled in sufficient places along the side wall so that the top sample is within 5 in. (125 mm) of the top face and the distance between samples or between the bottom face and a sample does not exceed one ingot diameter. A minimum of three samples per ingot is required.

Maybe you like

Standards Tags