ASTM A550-2006 Standard Specification for Ferrocolumbium《铌铁合金的标准规范》.pdf
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1、Designation: A 550 06Standard Specification forFerrocolumbium1This standard is issued under the fixed designation A 550; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates t
2、he year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers three grades of ferrocolum-bium, designated Low-Alloy Steel Grade, Alloy and StainlessSteel Grade, and High-Purity Grade.1.2 The values stat
3、ed in inch-pound units are to be regardedas the standard.2. Referenced Documents2.1 ASTM Standards:2A 1025 Specification for Ferroalloys and Other AlloyingMaterials, General RequirementsE11 Specification for Wire Cloth and Sieves for TestingPurposes3. General Conditions for Delivery3.1 Materials fur
4、nished to this specification shall conform tothe requirements of Specification A 1025, including anysupplementary requirements that are indicated in the purchaseorder. Failure to comply with the general requirements ofSpecification A 1025 constitutes nonconformance with thisspecification. In case of
5、 conflict between the requirements ofthis specification and Specification A 1025, this specificationshall prevail.4. Chemical Composition4.1 The material shall conform to the requirements as tochemical composition specified in Tables 1 and 2. The manu-facturer shall furnish an analysis of each shipm
6、ent showing thepercentage of each element specified in Table 1.4.2 For elements specified in Table 2 an analysis of each lotis not required. Upon request of the purchaser, the manufac-turer shall supply the results of an analysis for the elementsspecified in Table 2 on a cumulative basis over a peri
7、odmutually agreed upon by the manufacturer and the purchaser.5. Sizing5.1 Ferrocolumbium is available in sizes and to tolerancesshown in Table 3.6. Keywords6.1 columbium; ferrocolumbium; tantalum1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel, and Related
8、 Alloys and is the direct responsibility of SubcommitteeA 01.18 on Castings.Current edition approved July 1, 2006. Published July 2006. Originally approvedin 1965. Last previous edition approved in 2000 as A 550 78 (2000).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontac
9、t ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Chemical RequirementsElement Composition, %Low-Alloy SteelGradeAlloy and StainlessSteel GradeHigh-PurityGradeColumbiumA60.070.0 60.
10、070.0 60.070.0Tantalum, max 5.0 2.0 0.50BCarbon, max 0.5 0.3 0.10Manganese, max 3.0 2.0 0.50Silicon, max 4.0 2.5 0.40Aluminum, max 3.0C2.0C2.0DTin, max 0.25 0.15 0.02Phosphorus, max 0.10 0.05 0.02Sulfur, max 0.10 0.05 0.02Athe columbium content of any shipment shall be reported to the nearest 0.1 %.
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