1、Designation: B21/B21M 14B21/B21M 18Standard Specification forNaval Brass Rod, Bar, and Shapes1This standard is issued under the fixed designation B21/B21M; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This specification establishes the requirement
3、s for naval brass rod, bar, and shapes produced from Copper Alloy UNS Nos.C46200, C46400, C46750, C47940, C48200, C48500, or C48500.C48640.1.1.1 For piston-finish rod or shafting refer to the Other Requirements Section.1.1.2 For hot forging material, refer to Specification B124/B124M.1.2 UnitsThe va
4、lues stated in inch-pound units or SI units are to be regarded separately as standard. Within the text, SI unitsare shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be usedindependently of the other. Combining values from the two systems
5、may result in nonconformance with the specification.1.3 WarningMercury is a definite health hazard in use and disposal (see Performance Requirements).1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this
6、 standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in th
7、e Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2B124/B124M Specification for Copper and Copper Alloy Forging Rod, Bar, and
8、ShapesB154 Test Method for Mercurous Nitrate Test for Copper AlloysB249/B249M Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and ForgingsB601 Classification for Temper Designations for Copper and Copper AlloysWrought and CastB858 Test Method for Ammonia V
9、apor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper AlloysE8/E8M Test Methods for Tension Testing of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic MaterialsE62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) (Wit
10、hdrawn 2010)3E478 Test Methods for Chemical Analysis of Copper Alloys3. General Requirements3.1 The following sections of Specification B249/B249M constitute 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
11、Number of Tests and Retests,1 This specification is under the jurisdiction ofASTM Committee B05 on Copper and CopperAlloys and is the direct responsibility of Subcommittee B05.02 on Rod, Bar,Wire, Shapes and Forgings.Current edition approved Sept. 1, 2014Oct. 1, 2018. Published September 2014October
12、 2018. Originally approved in 1918. Last previous edition approved in 20122014as B21/B21M 12.B21/B21M14. DOI: 10.1520/B0021_B0021M-14.10.1520/B0021_B0021M18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of AST
13、M Standardsvolume information, refer to the standardsstandards Document Summary page on the ASTM website.3 The last approved version of this historical standard is referenced on www.astm.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indicat
14、ion of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be cons
15、idered the official document.*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 States13.1.6 Specimen Preparation,3.1.7 Test Methods,3.1.8 Significance of Numerical Limits,3.1.9 I
16、nspection,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 that referenced in 3.1, above, appears in this specification, it containsaddition
17、al requirements which supplement those appearing in Specification B249/B249M.4. Ordering Information4.1 Include the following specified choices when placing orders for product under this specification, as applicable:4.1.1 ASTM designation and year of issue,4.1.2 Copper Alloy UNS No. designation (Sco
18、pe),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, width and thickness (Dimensions and Permissible Variations),4.1.6 Length (Dimensions and Permissible Variations),4.1.7 Edg
19、e contours (Dimensions and Permissible Variations),4.1.8 Quantitynumber of pieces or total weight, for each size and form, and4.1.9 Intended application.4.2 The following options are available, but may not be included, unless specified at the time of placing of the order whenrequired:4.2.1 Tensile t
20、est for product 12 in. 12 mm and over, for the alloys and tempers listed in Table 4.4.2.2 Residual stress test (Performance Requirements section),4.2.3 Piston finish rod or shafting (Other Requirements section),4.2.4 Certification (Specification B249/B249M),4.2.5 Mill test report (Specification B249
21、/B249M),4.2.6 Heat identification or traceability details (Specification B249/B249M), and4.2.7 If product is purchased for agencies of the U.S. government (Other RequirementsPurchases for U.S. Government).5. Chemical Composition5.1 The material shall conform to the chemical composition requirements
22、specified in Table 1 for the Copper Alloy UNS No.designation specified in the ordering information.5.2 These composition limits do not preclude the presence of other elements. Limits may be established and analysis requiredfor unnamed elements by agreement between the manufacturer or supplier, and p
23、urchaser.5.3 For alloys in which zinc is listed as the “remainder,” either copper or zinc may be taken as the difference between the sumof the results of all other elements determined and 100 %. When copper is so determined, that difference value shall conform tothe requirements given in Table 1.5.4
24、 When all the elements listed in Table 1 for the Copper Alloy No. are determined, the sum of the results shall be 99.6 %minimum except for C46750, C46750 and C48640, which shall be 99.5 % minimum.TABLE 1 Chemical RequirementsElement,%Copper Alloy UNS No.C46200 C46400 C46750 C47940 C48200 C48500 C486
25、40Copper 62.065.0 59.062.0 59.262.5 63.066.0 59.062.0 59.062.0 59.062.0Tin 0.501.0 0.501.0 1.001.80 1.22.0 0.501.0 0.501.0 0.502.0Lead 0.20 max 0.20 max 0.25 max 1.02.0 0.401.0 1.32.2 1.03.0Zinc remainder remainder remainder remainder remainder remainder remainderIron 0.10 max 0.10 max 0.10 max 0.10
26、1.0 0.10 max 0.10 max 0.40 maxNickelA . . 0.50 max 0.100.50 . . 0.30 maxBAntimony . . 0.050.15 . . . .Phosphorus . . 0.050.15 . . . 0.050.25A Including cobalt.B Not including Co.B21/B21M 182TABLE 2 Tensile Requirements, Inch-poundTemper Designation Diameter or DistanceBetween ParallelA Surfaces,in.T
27、ensileStrength,min, ksiYield Strength at 0.5 %Extension Under Load,min, ksiElongation in 4 Diameter or Thicknessof Specimen, min, %BCode NameCopper Alloy UNS No. C46200M30 as-hot extruded all forms, all sizes 50 20 30O60 soft anneal rods and bars, all sizes 48 16 30O50 light anneal rods and bars:0.5
28、00 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 rods and bars:0.500 and under 58 27 22over 0.500 to 1.000, i
29、ncl 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 34 18Copper Alloy UNS No. C46400M30 as-hot extruded all f
30、orms, 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 25over 1.000 to 2.000, incl 58 26 25over 2.000 to 3.000,
31、 incl 54 25 25over 3.000 to 4.000, incl 54 22 27over 4.000 54 22 30H50C extruded and drawnC shapes, 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 2.000 to 3.000, incl 54 25 25over 3.000 to 4.000, incl 54
32、 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. C46750M30 as hot extruded all forms, all sizes 48 20 15O60 soft annealed rod and bar, all sizes 49 20 15O61 annealed rod and bar, all sizes 49 20 15H50 hot extruded and draw
33、n rod and bar:over 0.300 to .500 48 20 5over 0.500 to 1.000 48 20 10over 1.000 48 20 15Copper 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 anneal rods and bars:0.500 and under 58 30 18over 0.500 to 1.000, incl 56 30 2
34、0over 1.000 to 2.0, incl 54 25 22over 2.000 50 25 25H50C extruded and drawnC shapes, 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 2.000 50 25 25H04 hard rods and bars:0.500 and under 70 55 10over 0.500
35、to 1.000, incl 65 52 13over 1.000 to 2.000, incl 62 45 15B21/B21M 1836. Temper6.1 The standard tempers for products described in this specification, as defined in Classification B601, are shown in Tables 2and 3.7. Mechanical Property Requirements7.1 Product furnished under this specification shall c
36、onform to the mechanical property requirements prescribed in Tables 2-4.7.1.1 Rockwell Hardness RequirementsFor the alloys and tempers listed, the product 12 in. 12 mm and over in diameter ordistance between parallel surfaces should conform with the requirements prescribed in Table 4, when tested in
37、 accordance withTest Methods E18.7.1.1.1 For the alloys, tempers, and sizes listed in Table 4, Rockwell hardness may be used as the basis of acceptance or rejectionfor mechanical properties except when the tensile test is specified in the contract or purchase order.TABLE 2 ContinuedTemper Designatio
38、n Diameter or DistanceBetween ParallelA Surfaces,in.TensileStrength,min, ksiYield Strength at 0.5 %Extension Under Load,min, ksiElongation in 4 Diameter or Thicknessof Specimen, min, %BCode NameCopper Alloy UNS No. C48200M30 as-hot extruded all forms, all sizes 52 20 25O60 soft anneal rods and bars:
39、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 18over 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 25H50C extruded and dra
40、wnC shapes, 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 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
41、 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 50 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 3.00
42、0, incl 54 25 20over 3.000 to 4.000, incl 54 22 20over 4.000 54 22 20H50C extruded and drawnC shapes, all sizes 58 25 15H02 half-hard 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 20H04 har
43、d rods and bars:1.000 and under 67 45 10over 1.000 to 2.000, incl 62 37 13Copper Alloy UNS No. C48640M30 as hot-extruded all forms, all sizes 45.7 18 15H02 half-hard rod and bar:0.300 to 0.500, incl 45.7 18 5over 0.500 to 1.00, incl 45.7 18 10over 1.000 45.7 18 15A For rectangular bar, the Distance
44、Between Parallel Surfaces refers to thickness.B In any case, a minimum gage length of 1 in. shall be used.C This temper does not apply to hollow shapes.B21/B21M 184TABLE 3 Tensile Requirements, SITemper Designation Diameter or DistanceBetween ParallelA Surfaces,mmTensileStrength,min, MPaYield Streng
45、th at 0.5 %Extension Under Load,min, MPaElongation in 4Diameter or Thicknessof Specimen, min, %BCode NameCopper Alloy UNS No. C46200M30 as-hot extruded all forms, all sizes 345 140 30O60 soft anneal rods and bars, all sizes 330 110 30O50 light anneal rods and bars:12 and under 400 185 22over 12 to 2
46、5, incl 385 185 25over 25 to 50, incl 370 180 25over 50 to 75, incl 360 170 27over 75 to 100, incl 345 150 30over 100 345 140 30H60 cold heading, forming rods, all sizes 330 125 22H02 half-hard rods and bars:12 and under 400 185 22over 12 to 25, incl 385 185 25over 25 to 50, incl 370 180 25over 50 t
47、o 75, incl 360 170 27over 75 to 100, incl 345 150 30over 100 345 140 30H04 hard rods and bars:12 and under 440 275 13over 12 to 25, incl 425 260 13over 25 to 50, incl 400 235 18Copper Alloy UNS No. C46400M30 as-hot extruded all forms, all sizes 360 140 30O60 soft anneal rods and bars:25 and under 37
48、0 140 30over 25 to 50, incl 360 140 30over 50 345 140 30shapes, all sizes 360 140 30O50 light anneal rods and bars:12 and under 415 185 22over 12 to 25, incl 415 185 25over 25 to 50, incl 400 180 25over 50 to 75, incl 370 170 25over 75 to 100, incl 370 150 27over 100 370 150 30H50C extruded and draw
49、nC shapes, all sizes 400 170 20H02 half-hard rods and bars:12 and under 415 185 22over 12 to 25, incl 415 185 25over 25 to 50, incl 400 180 25over 50 to 75, incl 370 170 25over 75 to 100, incl 370 150 27over 100 370 150 30H04 hard rods and bars:25 and under 460 310 13over 25 to 50, incl 425 255 18Copper Alloy UNS No. C46750M30 as hot extruded all forms, all sizes 315 140 15O60 soft annealed rod and bar, all sizes 335 140 15O61 annealed rod and bar, all sizes 335 140 15H50 hot extruded and drawn rod and bar:over 8 to 12 315 140 5over 13
