1、Designation: B 425 99 (Reapproved 2005)Standard Specification forNi-Fe-Cr-Mo-Cu Alloy (UNS N08825 and UNS N08221)* Rodand Bar1This standard is issued under the fixed designation B 425; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision
2、, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification2covers nickel-iron-chromium-molybdenum-copper alloy (UNS N08825 and UNS N08221)*in t
3、he form of hot-finished and cold-drawn rounds, squares,hexagons, and rectangles.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.3 The following precautionary caveat pertains only to thetest methods portion, Sectio
4、n 12, of this specification: Thisstandard does not purport to address all of the safety problems,if any, associated with its use. It is the responsibility of the userof this standard to become familiar with all hazards includingthose identified in the appropriate Material Safety Data Sheet(MSDS) for
5、 this product/material as provided by the manufac-turer, to establish appropriate safety and health practices, anddetermine the applicability of regulatory limitations prior touse.2. Referenced Documents2.1 ASTM Standards:3B 424 Specification for Ni-Fe-Cr-Mo-Cu Alloy (UNSN08825 and UNS N08221)* Plat
6、e, Sheet, and StripB 880 Specification for General Requirements for ChemicalCheck Analysis Limits for Nickel, Nickel Alloys andCobalt AlloysE8 Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE 147
7、3 Test Methods for Chemical Analysis of Nickel,Cobalt, and High-Temperature Alloys3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 bar, nmaterial of rectangular (flats), hexagonal, orsquare solid section up to and including 10 in. (254 mm) inwidth and18 in. (3.2 mm) and over in
8、 thickness in straightlengths.3.1.1.1 DiscussionHot-worked rectangular bar in widths10 in. (254 mm) and under may be furnished as hot-rolled platewith sheared or cut edges in accordance with SpecificationB 424, provided the mechanical property requirements of thisspecification are met.3.1.2 rod, nma
9、terial of round solid section furnished instraight lengths.4. Ordering Information4.1 It is the responsibility of the purchaser to specify allrequirements that are necessary for the safe and satisfactoryperformance of material ordered under this specification.Examples of such requirements include, b
10、ut are not limited to,the following:4.1.1 ASTM designation and date of issue,4.1.2 UNS number,4.1.3 SectionRod (round) or bar (square, hexagonal, orrectangular),4.1.4 Dimensions, including length,4.1.5 Condition (see Appendix X1),4.1.6 Finish (see Appendix X1),4.1.7 QuantityFeet (or metres) or numbe
11、r of pieces,4.1.8 CertificationState if certification is required (Sec-tion 15),4.1.9 Samples for Product (Check) AnalysisState whethersamples for product (check) analysis should be furnished (see5.2), and4.1.10 Purchaser InspectionIf purchaser wishes to wit-ness tests or inspection of material at p
12、lace of manufacture, thepurchase order must so state, indicating which test or inspec-tions are to be witnessed (Section 13).1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.07 on Refined Nickel and
13、 Cobalt and Their Alloys.Current edition approved Nov. 1, 2005. Published February 2006. Originallyapproved in 1964. Last previous edition approved in 1999 as B 425 99.* New designation established in accordance with Practice E 527 and SAEJ 1086, Practice for Numbering Metals and Alloys (UNS).2For A
14、SME Boiler and Pressure Vessel Code applications, see related Specifi-cation SB-425 in Section II of that code.3For 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 s
15、tandards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5. Chemical Composition5.1 The material shall conform to the composition limitsspecified in Table 1.5.2 If a product (check) analysis i
16、s performed by thepurchaser, it shall be done in accordance with SpecificationB 880 and the material shall conform to the product (check)analysis variations defined in Table 1 of Specification B 880.6. Mechanical Properties and Other Requirements6.1 Mechanical PropertiesThe material shall conform to
17、the mechanical properties specified in Table 2.7. Dimensions and Permissible Variations7.1 Diameter, Thickness, or WidthThe permissible varia-tions from the specified dimensions as measured on thediameter or between parallel surfaces of cold-worked rod andbar shall be as prescribed in Table 3, and o
18、f hot-worked rod andbar as prescribed in Table 4.7.2 Out-of-RoundHot-worked rods and cold-worked rods(except “forging quality”) all sizes, in straight lengths, shall notbe out-of-round by more than one half the total permissiblevariations in diameter shown in Table 3 and Table 4, except forhot-worke
19、d rods12 in. (12.7 mm) in diameter and under, whichmay be out-of-round by the total permissible variations indiameter shown in Table 4.7.3 CornersCold-worked bars will have practically exactangles and sharp corners.7.4 Machining Allowances for Hot-Worked MaterialsWhen the surfaces of hot-worked prod
20、ucts are to be machined,the allowances prescribed in Table 5 are recommended fornormal machining operations.7.5 LengthThe permissible variations in length of cold-worked and hot-worked rod and bar shall be as prescribed inTable 6.7.5.1 Rods and bars ordered to random or nominal lengthswill be furnis
21、hed with either cropped or saw-cut ends; materialordered to cut lengths will be furnished with square saw-cut ormachined ends.7.6 Straightness:7.6.1 The permissible variations in straightness of cold-worked rod and bar as determined by the departure fromstraightness shall be as prescribed in Table 7
22、.7.6.2 The permissible variations in straightness of hot-worked rod and bar as determined by the departure fromstraightness shall be as specified in Table 8.8. Workmanship, Finish, and Appearance8.1 The material shall be uniform in quality and condition,smooth, commercially straight or flat, and fre
23、e of injuriousimperfections.9. Sampling9.1 LotDefinition:9.1.1 A lot for chemical analysis shall consist of one heat.9.1.2 A lot for mechanical properties testing shall consist ofall material from the same heat, nominal diameter or thickness,and condition.9.1.2.1 Where material cannot be identified
24、by heat, a lotshall consist of not more than 500 lb (227 kg) of material in thesame size and condition. A single piece weighing over 500 lbshall be considered as one lot.9.2 Test Material Selection:9.2.1 Chemical AnalysisRepresentative samples fromeach lot shall be taken during pouring or subsequent
25、 process-ing.9.2.1.1 Product (check) analysis shall be wholly the respon-sibility of the purchaser.9.2.2 Mechanical PropertiesSamples of the material toprovide test specimens for mechanical properties shall be takenfrom such locations in each lot as to be representative of thatlot.10. Number of Test
26、s10.1 Chemical AnalysisOne test per lot.10.2 TensionOne test per lot.11. Specimen Preparation11.1 Tension test specimens shall be taken from material inthe final condition and tested in the direction of fabrication.11.1.1 All rod and bar shall be tested in full cross-sectionsize when possible. When
27、a full cross-section size test cannotbe performed, the largest possible round specimen shown inTest Methods E8shall be used. Longitudinal strip specimensshall be prepared in accordance with Test Methods E8 forrectangular bar up to12 in. (12.7 mm), inclusive, in thicknesseswhich are too wide to be pu
28、lled full size.12. Test Methods12.1 The chemical composition and mechanical and otherproperties of the material as enumerated in this specificationshall be determined, in case of disagreement, in accordancewith the following ASTM standards:Test ASTM DesignationChemical analysis E 1473Tension E8Round
29、ing procedure E2912.2 For purposes of determining compliance with thespecified limits for requirements of the properties listed in thefollowing table, an observed or calculated value shall berounded as indicated below, in accordance with the roundingmethod of Practice E29:TABLE 1 Chemical Requiremen
30、tsElement UNS N08825 UNS N08221Nickel 38.046.0 39.046.0Chromium 19.523.5 20.022.0IronA22.0 min balanceManganese 1.0 max 1.0 maxCarbon 0.05 max 0.025 maxCopper 1.53.0 1.53.0Silicon 0.5 max 0.5 maxSulfur 0.03 max 0.03 maxAluminum 0.2 max 0.2 maxTitanium 0.61.2 0.61.0Molybdenum 2.53.5 5.06.5AElement sh
31、all be determined arithmetically by difference.B 425 99 (2005)2TestRounded unit for observed orcalculated valueChemical compositionand tolerances(when expressed indecimals)nearest unit in the last righthand place of figuresof the specified limit. If two choices are possible,as when the digits droppe
32、d are exactly a 5, or a5 followed only by zeros, choose the one endingin an even digit, with zero defined as an evendigit.Tensile strength andYield strengthnearest 1000 psi (6.9 MPa)Elongation nearest 1 %13. Inspection13.1 Inspection of the material shall be made as agreed uponbetween the manufactur
33、er and the purchaser as part of thepurchase contract.14. Rejection and Rehearing14.1 Material tested by the purchaser that fails to conform tothe requirements of this specification may be rejected. Rejec-tion should be reported to the producer or supplier promptlyand in writing. In case of dissatisf
34、action with the results of thetest, the producer or supplier may make claim for a rehearing.15. Certification15.1 When specified in the purchase order or contract, amanufacturers certification shall be furnished to the purchaserstating that the material has been manufactured, tested, andinspected in
35、 accordance with this specification and that testresults on representative samples meet specification require-ments. When specified in the purchase order or contract, areport of the test results shall be furnished.16. Product Marking16.1 The following information shall be marked on thematerial or in
36、cluded on the package, or on a label or tagattached thereto: The name of the material or UNS number;heat number; condition (temper); this specification number; thesize; gross, tare and net weight; consignor and consigneeaddress; contract or order number; or such other information asmay be defined in
37、 the contract or order.TABLE 2 Mechanical Properties (Rod and Bar)Alloy ConditionTensile Strengthmin, ksi (MPa)Yield Strength0.2 % offset, min,ksi (MPa)Elongation in 2in.or50mmor4D, min,%UNS N08825 Annealed: 85 (586) 35 (241) 30AHot-finished, colddrawnForging Quality:BBBUNS N08221 All sizes annealed
38、 79 (544) 34 (235) 30ANot applicable to diameters or cross sections under332 in. (2.4 mm).BForging quality is furnished to chemical requirements and surface inspection only. No tensile properties are required.TABLE 3 Permissible Variations in Diameter or DistanceBetween Parallel Surfaces of Cold-Wor
39、ked Rod and BarSpecified Dimension, in.(mm)APermissible Variations FromSpecified Dimension, in. (mm)Plus MinusRounds:116 (1.6) to316 (4.8), excl 0 0.002 (0.05)316 (4.8) to12 (12.7), excl 0 0.003 (0.08)12 (12.7) to1516 (23.8), incl 0.001 (0.03) 0.002 (0.05)Over1516 (23.8) to 11516 (49.2), incl 0.0015
40、 (0.04) 0.003 (0.08)Over 11516 (49.2) to 212 (63.5), incl 0.002 (0.05) 0.004 (0.10)Hexagons, squares, rectangles:12 (12.7) and less 0 0.004 (0.10)Over12 (12.7) to78 (22.2), incl 0 0.005 (0.13)Over78 (22.2) to 114 (31.8), incl 0 0.007 (0.18)Over 114 (31.8) to 2 (50.8), incl 0 0.009 (0.23)ADimensions
41、apply to diameter of rounds, to distance between parallelsurfaces of hexagons and squares, and separately to width and thickness ofrectangles.TABLE 4 Permissible Variations in Diameter or DistanceBetween Parallel Surfaces of Hot-Worked Rod and BarSpecified Dimension, in.(mm)APermissible Variations F
42、romSpecified Dimension, in. (mm)Plus MinusRod and bar, hot-worked:1 (25.4) and under 0.016 (0.41) 0.016 (0.41)over 1 (25.4) to 2 (50.8), incl 0.031 (0.79) 0.016 (0.41)over 2 (50.8) to 4 (101.6), incl 0.047 (1.19) 0.031 (0.79)over 4 (101.6) 0.125 (3.18) 0.063 (1.60)Rod, rough-turned or ground:Under 1
43、 (25.4) 0.005 (0.13) 0.005 (0.13)1 (25.4) and over 0.031 (0.79) 0Forging quality rod:BUnder 1 (25.4) 0.005 (0.13) 0.005 (0.13)1 (25.4) and over 0.031 (0.79) 0BSpot grinding is permitted to remove minor surface imperfections. The depthof these spot ground areas shall not exceed 3 % of the diameter of
44、 the rod.B 425 99 (2005)3TABLE 5 Normal Machining Allowances for Hot-Worked MaterialFinished-Machined Dimensionsfor Finishes As Indicated Below,in. (mm)ANormal Machining Allowance, in. (mm)On Diameter,for RodsDistance BetweenParallel Surfaces,for Hexagonaland Square BarsFor Rectangular BarOn Thickne
45、ss On WidthHot-worked:BUp to78 (22.2), incl18 (3.2)18 (3.2)18 (3.2)316 (4.8)Over78 to 178 (22.2 to 47.6), incl18 (3.2)316 (4.8)18 (3.2)316 (4.8)Over 178 to 278 (47.6 to 73.0), incl.316 (4.8)14 (6.4) .316 (4.8)Over 278 to 31316 (73.0 to 96.8), incl14 (6.4) . .316 (4.8)Over 31316 (96.8)14 (6.4) . .38
46、(9.5)Hot-worked rods, rough-turned or rough ground:C1516 to 4 (23.8 to 101.6), incl in diameter116 (1.6) . . .Over 4 to 12 (101.6 to 304.8), incl in diameter18 (3.2) . . .ADimensions apply to diameter of rods, to distance between parallel surfaces of hexagonal and square bar, and separately to width
47、 and thickness of rectangular bar.BThe allowances for hot-worked material in Table 5 are recommended for rods machined in lengths of 3 ft (0.91 m) or less and for bars machined in lengths of 2 ft (0.61m) or less. Hot-worked material to be machined in longer lengths should be specified showing the fi
48、nished cross-sectional dimension and the length in which the materialwill be machined in order that the manufacturer may supply material with sufficient oversize, including allowance for out-of-straightness.CApplicable to 3 ft (0.91 m) max length.TABLE 6 Permissible Variations in Length of Rods and
49、BarsRandom mill lengths:Hot-worked 6 to 24 ft (1.83 to 7.31 m) long with notmore than 25 weight % between 6 and9 ft (1.83 and 2.74 m)ACold-worked 6 to 20 ft (1.83 to 6.1 m) long with notmore than 25 weight % between 6 and10 ft (1.83 and 3.05 m).Multiple lengths Furnished in multiples of a specified unitlength, within the length limits indicatedabove. For each multiple, an allowanceof14 in. (6.4 mm) will be made for cutting,unless otherwise specified. At themanufacturers option, individual specifiedunit l
