1、Designation: B425 11Standard Specification forNi-Fe-Cr-Mo-Cu Alloy (UNS N08825, UNS N08221, andUNS N06845) Rod and Bar1This standard is issued under the fixed designation B425; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification2covers nickel-iron-chromium-molybdenum-copper alloy (UNS N08825, UNS N08221, andUNS N06845)3
3、in the form of hot-finished and cold-drawnrounds, squares, hexagons, and rectangles.1.2 The 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.1
4、.3 The following precautionary caveat pertains only to thetest methods portion, Section 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 haz
5、ards includingthose identified in the appropriate Material Safety Data Sheet(MSDS) for 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 St
6、andards:4B424 Specification for Ni-Fe-Cr-Mo-Cu Alloy (UNSN08825, UNS N08821, and UNS N06845) Plate, Sheet,and StripB880 Specification for General Requirements for ChemicalCheck Analysis Limits for Nickel, Nickel Alloys andCobalt AlloysE8 Test Methods for Tension Testing of Metallic MaterialsE29 Prac
7、tice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE1473 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, ors
8、quare solid section up to and including 10 in. (254 mm) inwidth and18 in. (3.2 mm) and over in 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 SpecificationB4
9、24, provided the mechanical property requirements of thisspecification are met.3.1.2 rod, nmaterial 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 satisfactoryperf
10、ormance of material ordered under this specification.Examples of such requirements include, but 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 Condi
11、tion (see Appendix X1),4.1.6 Finish (see Appendix X1),4.1.7 QuantityFeet (or metres) or number 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.
12、1.10 Purchaser InspectionIf purchaser wishes to wit-ness tests or inspection of material at place 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 M
13、etals and Alloys and is the direct responsibility of SubcommitteeB02.07 on Refined Nickel and Cobalt and Their Alloys.Current edition approved Oct. 1, 2011. Published November 2011. Originallyapproved in 1964. Last previous edition approved in 2009 as B425 99 (2009).DOI: 10.1520/B0425-11.2For ASME B
14、oiler and Pressure Vessel Code applications, see related Specifi-cation SB-425 in Section II of that code.3New designation established in accordance with Practice E527 and SAEJ 1086, Practice for Numbering Metals and Alloys (UNS).4For referenced ASTM standards, visit the ASTM website, www.astm.org,
15、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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700
16、, 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 is performed by thepurchaser, it shall be done in accordance with SpecificationB880 and the material shall conform t
17、o the product (check)analysis variations defined in Table 1 of Specification B880.6. Mechanical Properties and Other Requirements6.1 Mechanical PropertiesThe material shall conform tothe mechanical properties specified in Table 2.7. Dimensions and Permissible Variations7.1 Diameter, Thickness, or Wi
18、dthThe 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 of hot-worked rod andbar as prescribed in Table 4.7.2 Out-of-RoundHot-worked rods and cold-worked rods(except “forging
19、 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-worked rods12 in. (12.7 mm) in diameter and under, whichmay be out-of-round by the total permissible variations indiameter
20、 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 products are to be machined,the allowances prescribed in Table 5 are recommended fornormal machining operations.7.5 Lengt
21、hThe 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 furnished with either cropped or saw-cut ends; materialordered to cut lengths will be furnished with square saw-cut ormachi
22、ned 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.TABLE 1 Chemical RequirementsAElement UNS N08825 UNS N08221 UNS N06845Nickel 38.046.0 39.046.0 44.050.0Chromium 19.5
23、23.5 20.022.0 20.025.0IronB22.0 min balance balanceManganese 1.0 1.0 0.5Carbon 0.05 0.025 0.05Copper 1.53.0 1.53.0 2.02.4Silicon 0.5 0.5 0.5Sulfur 0.03 0.03 0.010Aluminum 0.2 0.2 .Titanium 0.61.2 0.61.0 .Molybdenum 2.53.5 5.06.5 5.07.0Tungsten . . 2.05.0AMaximum unless range or minimum is given. Whe
24、re ellipses (.) appear in this table, there is no requirement and analysis for the element need not be determinedor reported.BElement shall be determined arithmetically by difference.TABLE 2 Mechanical Properties (Rod and Bar)Alloy ConditionTensile Strengthmin, ksi (MPa)Yield Strength0.2 % offset, m
25、in,ksi (MPa)Elongation in 2in.or50mmor4D, min,%UNS N08825 Annealed: 85 (586) 35 (241) 30AHot-finished, colddrawnForging Quality:BBBUNS N08221 All sizes annealed 79 (544) 34 (235) 30UNS N06845 All sizes annealed 100 (690) 40 (276) 30ANot applicable to diameters or cross sections under332 in. (2.4 mm)
26、.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-Worked Rod and BarSpecified Dimension, in.(mm)APermissible Variations FromSpecified Dimensio
27、n, 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 (0.04) 0.003 (0.08)Over 11516 (49.2) to 212 (63.5), incl 0.002 (0.05) 0.004 (0.10)Hexago
28、ns, 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 apply to diameter of rounds, to distance between parallel surfacesof hexagons and squares
29、, and separately to width and thickness of rectangles.B425 1127.6.2 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
30、and condition,smooth, commercially straight or flat, and free 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 thicknes
31、s,and condition.9.1.2.1 Where material cannot be identified 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 samp
32、les fromeach lot shall be taken during pouring or subsequent 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 ea
33、ch lot as to be representative of thatlot.10. Number of Tests10.1 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 sh
34、all be tested in full cross-sectionsize when possible. When a full cross-section size test cannotbe performed, the largest possible round specimen shown inTest Methods E8 shall be used. Longitudinal strip specimensshall be prepared in accordance with Test Methods E8 forrectangular bar up to12 in. (1
35、2.7 mm), inclusive, in thicknesseswhich are too wide to be pulled 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
36、:Test ASTM DesignationChemical analysis E1473Tension E8Rounding 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 th
37、e roundingmethod of Practice E29:TestRounded unit for observed orcalculated valueChemical compositionand tolerances(when expressed indecimals)nearest unit in the last right hand place of figuresof the specified limit. If two choices are possible,as when the digits dropped are exactly a 5, or a5 foll
38、owed 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 manufacturer and the purchaser as part
39、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 dissatisfaction with the results of th
40、etest, 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 accordance with this specifi
41、cation 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 included on the package, or on
42、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 the contract or order.17. Ke
43、ywords17.1 UNS N08825; UNS N08221; UNS N06845; bar; rodTABLE 4 Permissible Variations in Diameter or DistanceBetween Parallel Surfaces of Hot-Worked Rod and BarSpecified Dimension, in.(mm)APermissible Variations FromSpecified Dimension, in. (mm)Plus MinusRod and bar, hot-worked:1 (25.4) and under 0.
44、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 (25.4) 0.005 (0.13) 0.005 (0.13)1 (25.4) and over 0.031 (0.79) 0Forging quality rod:BU
45、nder 1 (25.4) 0.005 (0.13) 0.005 (0.13)1 (25.4) and over 0.031 (0.79) 0ADimensions apply to diameter of rods, to distance between parallel surfaces ofhexagons and squares, and separately to width and thickness of rectangles.BSpot grinding is permitted to remove minor surface imperfections. The depth
46、 ofthese spot ground areas shall not exceed 3 % of the diameter of the rod.B425 113TABLE 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
47、,for Hexagonaland Square BarsFor Rectangular BarOn Thickness 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),
48、 incl14 (6.4) . .316 (4.8)Over 31316 (96.8)14 (6.4) . .38 (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 sur
49、faces of hexagonal and square bar, and separately to width 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 finished cross-sectional dimension and the length in which the materialwill be machined in order that the manufacturer may supply material with suffi
