1、Designation: B 16/B 16M 05Standard Specification forFree-Cutting Brass Rod, Bar and Shapes for Use in ScrewMachines1This standard is issued under the fixed designation B 16/B 16M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the
2、 year of last revision. A number 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 establi
3、shes the requirements for free-cutting brass rod, bar, wire, and shapes of any specified crosssection produced from CopperAlloy UNS No. C36000 suitablefor high-speed screw machining applications and moderatethread rolling.1.2 UnitsValues stated in either inch-pound units or SIunits are to be regarde
4、d separately as standard. Within the text,SI units are shown in brackets. The values stated in eachsystem may not be exact equivalents; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with thestandard.1.3 This standar
5、d 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 health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM
6、 Standards:2B 249/B 249M Specification for General Requirements forWrought Copper and Copper-Alloy Rod, Bar, Shapes, andForgingsB 250/B 250M Specification for General Requirements forWrought Copper-Alloy WireB 601 Practice for Temper Designations for Copper andCopper AlloysWrought and CastE8 Test Me
7、thods 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 followi
8、ng sections of Specifications B 249/B 249M(rod, bar, and shapes), and B 250/B 250M (wrought copperalloy wire) 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 Number of Tests and Retest,3.1.6 Spec
9、imen Preparation,3.1.7 Test Methods,3.1.8 Significance of Numerical 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 Package Marking, and3.1.14 Supplementary Requirements.3.2 In addition, when a section with a title identical to
10、 thosereferenced in 3.1 appears in this specification, it containsadditional requirements that supplement those appearing inSpecifications B 249/B 249M and B 250/B 250M.4. Ordering Information4.1 Include the following information when placing ordersfor product under this specification, as applicable
11、:4.1.1 ASTM specification designation and year of issue(B 16/B 16M XX).4.1.2 Copper Alloy UNS No. designation (C36000, seeSection 6 and Table 1).1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Ro
12、d,Bar, Shapes, Wire, and Forgings.Current edition approved March 1, 2005. Published April 2005. Originallyapproved in 1917. Last previous edition approved in 2000 as B 16 00.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For
13、Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Chemical RequirementsCopper Alloy UNS No. C36000Element Composition, %Copper 60.0 - 63.0Lead 2.5 - 3.7Iron, max 0.35Zinc remainder1*A Summary of Changes section appears at the end
14、 of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.3 Temper (see Section 7 and Tables 2-5).4.1.4 Product cross section form (for example, round, hex-agonal, square, etc.).4.1.5 Dimensions (see Section 9).4.1.6 How f
15、urnished: straight lengths or coils (see 5.2).4.1.7 Edge contours (see Section 9).4.1.8 Quantity; total weight, footage, or number of piecesfor each size.4.1.9 When product is purchased for applications requiringthread rolling (see 1.1, Tables 2-5).4.1.10 When product is purchased for agencies of th
16、e U.S.Government (see Section 11).4.2 The following options are available and shall be speci-fied at the time of placing the order when required:4.2.1 Tensile test for product12 in. 12 mm and over (see8.2.1).4.2.2 Certification (refer to Specifications B 249/B 249M orB 250/B 250M).4.2.3 Mill Test Re
17、port (refer to Specifications B 249/B 249M or B 250/B 250M).5. Materials and Manufacture5.1 MaterialThe material of manufacture shall be a castbillet of Copper Alloy UNS No. C36000 of such purity andsoundness as to be suitable for hot extrusion into rod, bar, wire,and shaped products.5.1.1 In the ev
18、ent that heat identification or traceability isrequired, the purchaser shall specify the details desired.NOTE 1Due to the discontinuous nature of the processing of castingsinto wrought products, it is not always practical to identify a specificcasting analysis with a specific quantity of finished ma
19、terial.5.2 ManufactureProduct produced under this specifica-tion shall be in straight lengths; however, it shall be furnishedin coils when so specified in the contract or purchase order (see4.1.6).6. Chemical Composition6.1 The product shall conform to the chemical composi-tional requirements specif
20、ied in Table 1 for Copper Alloy UNSNo. C36000.6.2 The UNS designated composition limits do not precludethe possible presence of other unnamed elements; however,analysis shall be made regularly only for the minor elementslisted in Table 1, plus either copper or zinc, or plus all majorelements except
21、one. The major element that is not analyzedshall be determined by difference between the sum of thoseelements analyzed and 100 %. By agreement between produceror supplier and purchaser, analysis may be required and limitsestablished for the elements not cited. Percentage content ofelements shown as
22、“remainder” (rem.) is calculated by differ-ence.TABLE 2 Tensile Requirements, inch-poundNOTESee Table 3 for SI values.Temper DesignationStandard NameDiameter or Distance BetweenParallel Surfaces, in.Tensile Strength,min, ksiYield Strengthat 0.5 %Extensionunder Load,min, ksiElongation,Amin, %Rod and
23、WireO60 softanneal1 and under 48 20 15over 1 to 2, incl. 44 18 20over 2 40 15 25H02 half-hard12 and under 57 25 7Bover12 to 1, incl. 55C25 10over 1 to 2, incl. 50 20 15over 2 to 4, incl., and 45 15 20over 4 40 15 20H04 hard116 to316, incl. 80 45over316 to12, incl. 70 35 4over12 to34, incl. 65 30 6Ba
24、rStandard Name Thickness, in. Width, in.O60 soft anneal 1 and under 6 and under 44 18 20over 1 6 and under 40 15 25H02 half-hard12 and under 1 and under 50 25 1012 and under over 1 to 6, incl. 45 17 15over12 to 2, incl. 2 and under 45 17 15over12 to 2, incl. over 2 to 6, incl. 40 15 20over 2 over 2
25、to 4, incl. 40 15 20AIn any case, a minimum gage length of 1 in. shall be used.BFor product furnished in coils the elongation shall be 4 % min.CIf product is specified for thread rolling applications, the minimum tensile strength shall be 52 ksi.B 16/B 16M 052TABLE 3 Tensile Requirements, SINOTESee
26、Table 2 for inchpound values.Temper DesignationStandard NameDiameter or Distance BetweenParallel Surfaces, mmTensile Strength,min, MPaYield Strengthat 0.5 %Extensionunder Load,min, MPaElongation,Amin, %Rod and WireO60 softanneal25 and under 330 140 15over 25 to 50, incl. 305 125 20over 50 275 105 25
27、H02 half-hard 12 and under 395 170 7Bover 12 to 25, incl. 380C170 10over 25 to 50, incl. 345 140 15over 50 to 100, incl., and 310 105 20over 100 275 105 20H04 hard 1.6 to 4, incl. 550 310over 4 to 12, incl. 480 240 4over 12 to 18, incl. 450 205 6BarStandard Name Thickness, mm Width, in.O60 soft anne
28、al 25 and under 150 and under 305 125 20over 25 150 and under 275 105 25H02 half-hard 12 and under 25 and under 345 170 1012 and under over 25 to 150, incl. 310 115 15over 12 to 50, incl. 50 and under 310 115 15over 12 to 50, incl. over 50 to 150, incl. 275 105 20over 50 over 50 to 100, incl. 275 10
29、5 20AIn any case, a minimum gage length of 25 mm shall be used. SI elongation values are based on a gage length of 5.65 times the square root of the area for dimensionsgreater than 2.5 mm.BFor product furnished in coils the elongation shall be 4 % min.CIf product is specified for thread rolling appl
30、ications, the minimum tensile strength shall be 350 MPa.TABLE 4 Rockwell Hardness Requirements, inch-poundNOTE 1See Table 5 for SI values.NOTE 2Rockwell hardness requirements are not established for diameters less than12 in.Temper DesignationDiameter of Distance BetweenParallel Surfaces, in.Rockwell
31、 B Hardness Determined on the Cross SectionMidway Between Surface and CenterRod and WireStandard Name Round Hexagonal and OctagonalO60 soft anneal12 and over 10 - 45 10 - 45H02 half-hard12 to 1, incl. 60 - 80A55 - 80over 1 to 2, incl. 55 - 75 45 - 80over 2 to 3, incl. 45 - 70 40 - 65over 3 to 4, inc
32、l. 40 - 65 35 - 60over 4 25 min 25 minBarThickness, in. Width, in.O60 soft anneal12 and over12 and over 10 - 35H02 half-hard12 and under 1 and under 45 - 8512 and under over 1 to 6, incl. 35 - 70over12 to 2, incl. 2 and under 40 - 80over 2 to 6, incl. 35 - 70over 2 over 2 to 4, incl. 35 - 70AIf prod
33、uct is specified for thread rolling application, the Rockwell B hardness shall be 5575.B 16/B 16M 0536.3 When all elements in Table 1 are analyzed, their sumshall be 99.5 % min.7. Temper7.1 Tempers, as defined in Practice B 601, identified inTables 2-5 for product produced under this specification,
34、are asfollows:7.1.1 O60 (soft anneal).7.1.2 H02 (half hard).7.1.3 H04 (hard).7.2 Rod and bar shall be furnished in the H02 (half hard)temper, unless otherwise specified in the ordering information(see 4.1.3).8. Mechanical Property Requirements8.1 Rockwell Hardness:8.1.1 Product12 in. 12 mm, and over
35、 in diameter ordistance between parallel surfaces, shall conform with therequirements given in Table 4 and Table 5 for temper, size, andform when tested in accordance with Test Methods E18.8.1.1.1 Rockwell hardness shall be the acceptance criterionfor sizes12 in. 12 mm, or greater, based upon mechan
36、icalproperties, except when tensile requirements are specified asthe acceptance criteria in the ordering information.8.2 Tensile Requirements:8.2.1 When tensile requirements are specified, the productshall conform to the requirements given in Table 2 and Table 3for temper, size, and form.8.2.1.1 Ten
37、sile requirements shall be the acceptance criteriaof mechanical properties for product under12 in. 12 mm indiameter or distance between parallel surfaces when tested inaccordance with Test Methods E8or E8M.8.2.1.2 When specified in the ordering information, tensilerequirements shall be the acceptanc
38、e criteria based uponmechanical properties for product12 in. 12 mm, or greater indiameter or distance between parallel planes when tested inaccordance with Test Methods E8or E8M.8.3 ShapesMechanical property requirements for shapesshall be subject to agreement between the manufacturer and thepurchas
39、er and the agreement shall be part of that contract orpurchase order.9. Dimensions, Mass, and Permissible Variations9.1 The dimensions and tolerances for bar, rod and shapesproduced under this specification shall be as specified in thefollowing tables and paragraphs in Specification B 249/B 249M.9.1
40、.1 Diameter or Distance Between Parallel Surfaces:9.1.1.1 Rod in LengthSee Table 1.9.1.1.2 Bar, Rectangular and SquareSee Tables 8 and 10.9.1.2 ShapesDimensional tolerances shall be subject toagreement between the manufacturer and the purchaser and theagreement shall be part of the contract or purch
41、ase order.9.1.3 Length:9.1.3.1 Rod, Bar, and ShapesSee Tables 13 and 14.9.1.4 Edge ContoursRefer to the subsection titled “EdgeContours” and Figs. 1, 2, and 3.9.1.5 Straightness:9.1.5.1 Rod Bar, and Shapes-See Table 16.9.2 The dimensions and tolerances for wire product underthis specification shall
42、be as specified in Table 1 and the relatedsection in Specification B 250/B 250M.9.2.1 Wire, Coiled, RoundSee Table 1.10. Test Methods10.1 Chemical Analysis:10.1.1 Chemical composition shall, in case of disagreement,be determined as follows:TABLE 5 Rockwell Hardness Requirements, SINOTE 1See Table 4
43、for inchpound values.NOTE 2Rockwell hardness requirements are not established for diameters less than 12 mm.Temper DesignationDiameter of Distance BetweenParallel Surfaces, mmRockwell B Hardness Determined on the Cross SectionMidway Between Surface and CenterRod and WireStandard Name Round Hexagonal
44、 and OctagonalO60 soft anneal 12 and over 10 - 45 10 - 45H02 half-hard 12 to 25, incl. 60 - 80A55 - 80over 25 to 50, incl. 55 - 75 45 - 80over 50 to 75, incl. 45 - 70 40 - 65over 75 to 100, incl. 40 - 65 35 - 60over 100 25 min 25 minBarThickness, mm Width, mmO60 soft anneal 12 and over 12 and over 1
45、0 - 35H02 half-hard 12 and under 25 and under 45 - 8512 and under over 25 to 150, incl. 35 - 70over 12 to 50, incl. 50 and under 40 - 80over 50 to 150, incl. 35 - 70over 50 over 50 to 100, incl. 35 - 70AIf product is specified for thread rolling application, the Rockwell B hardness shall be 5575.B 1
46、6/B 16M 054Element Test MethodCopper E 478Lead E 478 atomic absorptionIron E 478Zinc E 478 titrimetric10.2 Test method(s) to be followed for the determination ofother element(s) resulting from contractual or purchaser orderagreement shall be as agreed upon between the manufacturerand the purchaser.1
47、1. Purchases for U.S. Government Agencies11.1 Product purchased for agencies of the U.S. Govern-ment, when specified in the contract or purchase order, shallconform to the special Supplementary Requirements section inSpecifications B 249/B 249M (rod, bar, and shapes) and B 250/B 250M (wire).12. Keyw
48、ords12.1 CopperAlloy UNS No. C36000; free-cutting brass bar;free-cutting brass rod; free-cutting brass wire; screw machinerodSUMMARY OF CHANGESCommittee B05 has identified the location of selected changes to this standard since the last issue(B 16/B 16M 00) that may impact its use. (approved Mar. 1,
49、 2005)(1) ScopeAdded section 1.3 Safety caveat.(2) Materials and ManufactureExpanded for clarity.(3) Mechanical Property RequirementsRevised Table 2 andTable 4 and added Table 3 and Table 5 to delineate inchpoundand SI mechanical property requirements.(4)DimensionsAdded section 9.1.5 StraightnessASTM 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 vali
