1、Designation: B 21/B 21M 06Standard Specification forNaval Brass Rod, Bar, and Shapes1This standard is issued under the fixed designation B 21/B 21M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A numbe
2、r 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.1. Scope*1.1 This specification establishes the requirements for naval
3、brass rod, bar, and shapes produced from Copper Alloy UNSNos. C46200, C46400, C47940, C48200, or C48500.1.1.1 For piston-finish rod or shafting refer to the OtherRequirements Section.1.1.2 For hot forging material, refer to Specification B 124/B 124M.1.2 UnitsThe values stated in inch-pound units or
4、 SI unitsare to be regarded separately as standard. Within the text, SIunits are shown in brackets. The values in each system are notexact equivalents; therefore, each system shall be used inde-pendently of the other. Combining values from the two systemsmay result in nonconformance with the specifi
5、cation.1.3 WarningMercury is a definite health hazard in useand disposal (see Performance Requirements).1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and
6、health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B 124/B 124M Specification for Copper and Copper AlloyForging Rod, Bar, and ShapesB 154 Test Method for Mercurous Nitrate Test for CopperAlloysB 249/B 249M Specificatio
7、n for General Requirements forWrought Copper and Copper-Alloy Rod, Bar, Shapes andForgingsB 601 Classification for Temper Designations for Copperand Copper AlloysWrought and CastB 858 Test Method for Ammonia Vapor Test for Determin-ing Susceptibility to Stress Corrosion Cracking in CopperAlloysE8 Te
8、st Methods for Tension Testing of Metallic MaterialsE8M Test Methods for Tension Testing of Metallic Mate-rials MetricE18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic MaterialsE 478 Test Methods for Chemical Analysis of CopperAlloys3. General Requirements3.1 The fo
9、llowing sections of Specification B 249/B 249Mconstitute a part of this specification:3.1.1 Terminology,3.1.2 Materials and Manufacture,3.1.3 Workmanship, Finish, and Appearance,3.1.4 Sampling,3.1.5 Number of Tests and Retests,3.1.6 Specimen Preparation,3.1.7 Test Methods,3.1.8 Significance of Numer
10、ical Limits,3.1.9 Inspection,3.1.10 Rejection and Rehearing,3.1.11 Certification,3.1.12 Mill Test Report,3.1.13 Packaging and Product Marking, and3.1.14 Supplementary Requirements.3.2 In addition, when a section with a title identical to thatreferenced in 3.1, above, appears in this specification, i
11、tcontains additional requirements which supplement those ap-pearing in Specification B 249/B 249M.4. Ordering Information4.1 Include the following information when placing ordersfor product under this specification, as applicable:4.1.1 ASTM designation and year of issue,4.1.2 Copper Alloy UNS No. de
12、signation (Scope),4.1.3 Temper (Temper Section and related Tables),4.1.4 Formcross-section such as round, hexagonal,square, and so forth,4.1.5 Diameter or distance between parallel surfaces, widthand thickness (Dimensions and Permissible Variations),1This specification is under the jurisdiction ofAS
13、TM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod,Bar, Wire, Shapes, and Forgings.Current edition approved Feb. 1, 2006. Published February 2006. Originallyapproved in 1918. Last previous edition approved in 2001 as B 21/B 21M 01e1.2For refere
14、nced 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 standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyr
15、ight ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.6 Length (Dimensions and Permissible Variations),4.1.7 Edge contours (Dimensions and Permissible Varia-tions),4.1.8 Quantitynumber of pieces or total weight, for eachsize and form, and4.1
16、.9 When product is specified for agencies of the U.S.government (Other RequirementsPurchases for U.S. Gov-ernment).4.2 The following are options available under this specifi-cation and are to be specified in the contract or purchase orderwhen required:4.2.1 Tensile test for product12 in. 12 mm and o
17、ver, forthe alloys and tempers listed in Table 4.4.2.2 Residual stress test (Performance Requirements sec-tion),4.2.3 Piston finish rod or shafting (Other Requirementssection),4.2.4 Certification (Specification B 249/B 249M),4.2.5 Mill test report (Specification B 249/B 249M), and4.2.6 Heat identifi
18、cation or traceability details (Specifica-tion B 249/B 249M).5. Chemical Composition5.1 The material shall conform to the chemical compositionrequirements specified in Table 1 for the Copper Alloy UNSNo. designation specified in the ordering information.5.2 These composition limits do not preclude t
19、he presenceof other elements. Limits may be established and analysisrequired for unnamed elements by agreement between themanufacturer or supplier, and purchaser.5.3 For copper alloys in which zinc is listed as the “remain-der,” either copper or zinc may be taken as the differencebetween the sum of
20、results of all elements determined and100 %. When copper is so determined, that difference valueshall conform to the requirements given in Table 1.5.4 When all elements listed in Table 1 for the CopperAlloyUNS No. specified in the ordering information are determined,the sum of results shall be 99.6
21、% minimum.6. Temper6.1 The standard tempers for products described in thisspecification, as defined in Classification B 601, are shown inTables 2 and 3.7. Mechanical Property Requirements7.1 Product furnished under this specification shall conformto the mechanical property requirements prescribed in
22、 Tables2-4.7.1.1 Rockwell Hardness RequirementsFor the alloys andtempers listed, the product12 in. 12 mm and over in diameteror distance between parallel surfaces should conform with therequirements prescribed in Table 4, when tested in accordancewith Test Methods E18.7.1.1.1 For the alloys, tempers
23、, and sizes listed in Table 4,Rockwell hardness may be used as the basis of acceptance orrejection for mechanical properties except when the tensile testis specified in the contract or purchase order.7.1.1.2 Hardness test results outside the ranges of Table 4shall not be cause for rejection if the t
24、ensile property require-ments of Tables 2 and 3 are met.7.1.2 Tensile Strength RequirementsThe product shallconform with the requirements of Tables 2 and 3, when testedin accordance with Test Methods E8and E8M.8. Performance Requirements8.1 Residual Stress Test:8.1.1 When specified in the contract o
25、r purchase order, theproduct shall be tested for residual stress according to therequirements of Test Method B 154 or Test Method B 858 andshow no signs of cracking.8.1.2 Unless otherwise agreed upon between the manufac-turer, or supplier, and the purchaser, the manufacturer shallhave the option of
26、using either the mercurous nitrate test or theammonia vapor test. When the ammonia vapor test is used, thetest pH value shall be 10 unless otherwise specified by thepurchaser. (WarningMercury is a definite health hazard.With the mercurous nitrate test, equipment for the detectionand removal of mercu
27、ry vapor produced in volatilization andthe use of protective gloves is recommended.)NOTE 1Aresidual stress test provides information about the adequacyof the stress relief of the material. Bar straightening is a method ofmechanical stress relief. Stress relief annealing is a method of thermalstress
28、relief.9. Other Requirements9.1 Piston-Finish Rod and Shafting:9.1.1 When so specified in the contract or order, round rodsover12-in. 12 mm diameter shall be furnished as piston-finishrods or shafting.9.1.2 Piston-finish rods shall have a special surface pro-duced by turning or grinding and shall co
29、mply with the specialdiameter tolerances specified in Piston-Finish Rod Sectionunder Dimensions and Permissible Variations.9.1.3 The straightness tolerances for piston-finish rod aresubject to agreement between the manufacturer or supplier andthe purchaser.9.2 Purchases for U.S. Government:9.2.1 Pro
30、duct purchased for agencies of the U.S. Govern-ment shall conform to the additional requirements prescribed inthe Supplementary Requirements section of SpecificationB 249/B 249M.10. Dimensions and Permissible Variations10.1 The dimensions and tolerances for product covered bythis specification shall
31、 be as specified in the current edition ofSpecification B 249/B 249M, with particular reference to thefollowing Tables and related paragraphs in that specification:TABLE 1 Chemical RequirementsElement,%Copper Alloy UNS No.C46200 C46400 C47940 C48200 C48500Copper 62.065.0 59.062.0 63.066.0 59.062.0 5
32、9.062.0Tin 0.501.0 0.501.0 1.22.0 0.501.0 0.501.0Lead 0.20 max 0.20 max 1.02.0 0.401.0 1.32.2Zinc remainder remainder remainder remainder remainderIron 0.10 max 0.10 max 0.101.0 0.10 max 0.10 maxNickelA. . 0.100.50 . .AIncluding cobalt.B 21/B 21M 062TABLE 2 Tensile Requirements, inch-poundTemper Des
33、ignationDiameter or Distance BetweenParallelASurfaces,in.Tensile Strength,min, ksiYield Strength at0.5 %Extension UnderLoad, min, ksiElongation in4 3 Diameter orThickness ofSpecimen, min,%BCode NameCopper Alloy UNS No. C46200M30 as-hot extruded all forms, all sizes 50 20 30O60 soft anneal rods and b
34、ars, all sizes 48 16 30O50 light anneal rods and bars:0.500 and under 58 27 22over 0.500 to 1.000, incl 56 27 25over 1.000 to 2.000, incl 54 26 25over 2.000 to 3.000, incl 52 25 27over 3.000 to 4.000, incl 50 22 30over 4.000 50 20 30H60 cold heading, forming rods, all sizes 48 18 22H02 half-hard rod
35、s and bars:0.500 and under 58 27 22over 0.500 to 1.000, incl 56 27 25over 1.000 to 2.000, incl 54 26 25over 2.000 to 3.000, incl 52 25 27over 3.000 to 4.000, incl 50 22 30over 4.000 50 20 30H04 hard rods and bars:0.500 and under 64 40 13over 0.500 to 1.000, incl 62 38 13over 1.000 to 2.000, incl 58
36、34 18Copper Alloy UNS No. C46400M30 as-hot extruded all forms, all sizes 52 20 30O60 soft anneal rods and bars:1.000 and under 54 20 30over 1.000 to 2.000, incl 52 20 30over 2.000 50 20 30shapes, all sizes 52 20 30O50 light anneal rods and bars:0.500 and under 60 27 22over 0.500 to 1.000, incl 60 27
37、 25over 1.000 to 2.000, incl 58 26 25over 2.000 to 3.000, incl 54 25 25over 3.000 to 4.000, incl 54 22 27over 4.000 54 22 30H50Cextruded and drawnCshapes, all sizes 58 25 20H02 half-hard rods and bars:0.500 and under 60 27 22over 0.500 to 1.000, incl 60 27 25over 1.000 to 2.000, incl 58 26 25over 2.
38、000 to 3.000, incl 54 25 25over 3.000 to 4.000, incl 54 22 27over 4.000 54 22 30H04 hard rods and bars:1.000 and under 67 45 13over 1.000 to 2.000, incl 62 37 18Copper Alloy UNS No. C47940M30 as-hot extruded all forms, all sizes 50 20 30O60 soft anneal rods and bars, all sizes 48 20 30O50 light anne
39、al rods and bars:0.500 and under 58 30 18over 0.500 to 1.000, incl 56 30 20over 1.000 to 2.0, incl 54 25 22over 2.000 50 25 25H50Cextruded and drawnCshapes, all sizes 56 25 20H02 half-hard rods and bars:0.500 and under 58 30 18over 0.500 to 1.000, incl 56 30 20over 1.000 to 2.000, incl 54 25 22over
40、2.000 50 25 25H04 hard rods and bars:0.500 and under 70 55 10over 0.500 to 1.000, incl 65 52 13over 1.000 to 2.000, incl 62 45 15Copper Alloy UNS No. C48200B 21/B 21M 06310.2 Diameter or Distance Between Parallel Surfaces:10.2.1 Rod: Round, Hexagonal, OctagonalSee Table 1.10.2.2 Rod, M30 (As-Hot Ext
41、ruded)See Table 4.10.2.3 Piston-Finish RodSee Table 3.10.2.4 Bar: Rectangular and SquareSee Tables 8 and 10.10.2.5 Bar, M30 (As-Hot Extruded)See Table 4.10.3 ShapesThe dimensional tolerances for shapes shallbe as agreed upon by the manufacturer or supplier and thepurchaser, and shall be specified in
42、 the order.10.4 Length of Rod, Bar, and ShapesSee Tables 13 and14.10.5 Straightness:10.5.1 Rod and BarSee Table 16.10.5.2 Shafting RodSee Table 17.10.5.3 M30 (As-Hot Extruded)Rod, bar, and shapes shallbe commercially straight.10.6 Edge ContoursSee Edge Contours Section.11. Specimen Preparation11.1 I
43、n the tension test all material shall be pulled in fullsize when practicable. Full-size or machined test specimensshall be as specified in the Test Specimen Section of TestMethods E8 and E 8M. Whenever tension test results areobtained from both full-size and from machined test specimensand they diff
44、er, the results obtained from full-size test speci-mens shall be used to determine conformance to the require-ments of this specification.TABLE 2 ContinuedTemper DesignationDiameter or Distance BetweenParallelASurfaces,in.Tensile Strength,min, ksiYield Strength at0.5 %Extension UnderLoad, min, ksiEl
45、ongation in4 3 Diameter orThickness ofSpecimen, min,%BCode NameM30 as-hot extruded all forms, all sizes 52 20 25O60 soft anneal rods and bars:1.000 and under 54 20 25over 1.000 to 2.000, incl 52 20 25over 2.000 50 20 25shapes, all sizes 52 20 25O50 light anneal rods and bars:1.000 and under 60 27 18
46、over 1.000 to 2.000, incl 58 26 20over 2.000 to 3.000, incl 54 25 20over 3.000 to 4.000, incl 54 22 20over 4.000 54 22 25H50Cextruded and drawnCshapes, all sizes 58 25 15H02 half-hard rods and bars:1.000 and under 60 27 18over 1.000 to 2.000, incl 58 26 20over 2.000 to 3.000, incl 54 25 20over 3.000
47、 to 4.000, incl 54 22 20over 4.000 54 22 25H04 hard rods and bars:1.000 and under 67 45 11over 1.000 to 2.000, incl 62 37 15Copper Alloy UNS No. C48500M30 as-hot extruded all forms, all sizes 52 20 20O60 soft anneal rods and bars:1.000 and under 54 20 20over 1.000 to 2.000, incl 52 20 20over 2.000 5
48、0 20 20shapes, all sizes 52 20 20O50 light anneal rods and bars:1.000 and under 60 27 12over 1.000 to 2.000, incl 58 26 20over 2.000 to 3.000, incl 54 25 20over 3.000 to 4.000, incl 54 22 20over 4.000 54 22 20H50Cextruded and drawnCshapes, all sizes 58 25 15H02 half-hard rods and bars:1.000 and unde
49、r 60 27 12over 1.000 to 2.000, incl 58 26 20over 2.000 to 3.000, incl 54 25 20over 3.000 to 4.000, incl 54 22 20over 4.000 54 22 20H04 hard rods and bars:1.000 and under 67 45 10over 1.000 to 2.000, incl 62 37 13AFor rectangular bar, the Distance Between Parallel Surfaces refers to thickness.BIn any case, a minimum gage length of 1 in. shall be used.CThis temper does not apply to hollow shapes.B 21/B 21M 064TABLE 3 Tensile Requirements, SITemper DesignationDiameter or Distance BetweenParallelASurfaces,mmTensileStrength,min,MPaYield S
