1、Designation: A550 06 (Reapproved 2015)Standard Specification forFerrocolumbium1This standard is issued under the fixed designation A550; 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 parenth
2、eses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers three grades offerrocolumbium, designated Low-Alloy Steel Grade,Alloy andStainless Steel Grade, and High-Purity Grade.1.2 The
3、 values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A1025 Specification for Ferroalloys and Other All
4、oyingMaterials, General RequirementsE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3. General Conditions for Delivery3.1 Materials furnished to this specification shall conform tothe requirements of Specification A1025, including any supple-mentary requirements that are indicated in
5、 the purchase order.Failure to comply with the general requirements of Specifica-tion A1025 constitutes nonconformance with this specification.In case of conflict between the requirements of this specifica-tion and Specification A1025, this specification shall prevail.4. Chemical Composition4.1 The
6、material shall conform to the requirements as tochemical composition specified in Tables 1 and 2. The manu-facturer shall furnish an analysis of each shipment 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
7、 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 periodmutually agreed upon by the manufacturer and the purchaser.5. Sizing5.1 Ferrocolumbium is available in sizes and to tolerancesshown in Table 3.
8、6. Keywords6.1 columbium; ferrocolumbium; tantalum1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved Nov. 15, 2015. Published November 2015. Origin
9、allyapproved in 1965. Last previous edition approved in 2010 as A550 06 (2010).DOI: 10.1520/A0550-06R15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standard
10、s Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1TABLE 1 Chemical RequirementsElement Composition, %Low-Alloy SteelGradeAlloy a
11、nd StainlessSteel GradeHigh-PurityGradeColumbiumA60.070.0 60.070.0 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 co
12、ntent of any shipment shall be reported to the nearest 0.1 %.BOr 0.25 % maximum as agreed between purchaser and seller.COr 1.50 % maximum as agreed between purchaser and seller.DOr 1.0 maximum as agreed between purchaser and seller.TABLE 2 Supplemental Chemical RequirementsNOTE 1These are maximum li
13、mits allowable unless otherwisestated.AElement Composition, %ALow-AlloySteel GradeAlloy and StainlessSteel GradeHigh-PurityGradeChromium 1.00 1.00 0.10Tungsten 1.00 0.5 0.05Titanium 1.00 1.0 0.10Lead 0.25 0.01 0.01Cobalt 0.25 0.05 0.05AThe composition of the ferrocolumbian shall be within these limi
14、ts; however, ananalysis of each lot is not required. Upon request, the manufacturer shall supplythe results of an analysis for these elements on terms previously agreed upon bythe manufacturer and purchaser.TABLE 3 Standard Sizes and TolerancesStandard Size ToleranceAFriabilityRating2 in. by down 10
15、 % max retainedon 2-in. (50-mm)sieve410 % max passingNo. 8 (2.36-mm)sieve12 in. by down 10 % max retainedon -in. (12.5-mm)sieve4 in. by down 10 % max retainedon -in. (6.3-mm)sieve48 mesh by down 10 % max retainedon No. 8 (2.36-mm)sieve420 mesh by down 10 % max retainedon No. 20 (0.85-mm) sieve4ASpec
16、ifications of sieve sizes used to define tolerances herein are as listed inSpecification E11.A550 06 (2015)2SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue, A550 78(2000), that may impact the use of this standard. (Approved July 1
17、, 2006.)(1) Deleted three existing references and added A1025 inparagraph 2.1.(2) Reference to A1025 included and deleted ordering infor-mation in Section 3.(3) Revised statement regarding Tables 1 and 2 in paragraphs4.1 and 4.2.(4) Paragraph 5.1 revised to reference Table 3 and paragraph5.2 deleted
18、.(5) Deleted Sections 6 9.(6) Revised Tables 1 and 2.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent ri
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22、y be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 06 (2015)3
