1、Designation: B 446 03 (Reapproved 2008)Standard Specification forNickel-Chromium-Molybdenum-Columbium Alloy (UNSN06625), Nickel-Chromium-Molybdenum-Silicon Alloy (UNSN06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy(UNS N06650)* Rod and Bar1This standard is issued under the fixed designation B
2、446; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, 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 reappr
3、oval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers nickel-chromium-molybdenum-columbium (UNS N06625), nickel-chromium-molybdenum-silicon alloy (UNS N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy (UNS N06650)* inthe form
4、 of hot-worked rod and bar and cold-worked rod in theconditions shown in Table 1.1.1.1 UNS N06625 products are furnished in two grades ofdifferent heat-treated conditions:1.1.1.1 Grade 1 (Annealed)Material is normally em-ployed in service temperatures up to 1100F (593C).1.1.1.2 Grade 2 (Solution Ann
5、ealed)Material is normallyemployed in service temperatures above 1100F (593C) whenresistance to creep and rupture is required.NOTE 1Hot-working or reannealing may change properties signifi-cantly, depending on working history and temperatures.1.1.2 Alloys UNS N06219 and UNS N06650 are supplied insol
6、ution annealed condition only.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, Section 12, of this specification: Thisstandard does not
7、 purport to address all of the safety concerns,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 this product/material as provided by the manufac-
8、turer, to establish appropriate safety and health practices, anddetermine the applicability of regulatory limitations prior touse.2. Referenced Documents2.1 ASTM Standards:2B 443 Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNSN06625) and Nickel-Chromium-Molybdenum-Silicon Alloy (UN
9、S N06219)* Plate, 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 Speci
10、ficationsE 1473 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) or square solidsection up to and including 10 in. (254 mm) in width and18 in.(3.2 mm) and over
11、in thickness in straight lengths.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 443, provided the mechanical property requirements of thisspecification are met.3.1.2 rod,
12、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 satisfactoryperformance of material ordered under this specification.Examples of such requirements include
13、, but are not limited to,the following: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 Cobalt and Their Alloys.Current edition approved March 1, 2008. Published March 2008.
14、 Originallyapproved in 1966. Last previous edition approved in 2003 as B 446 - 03.* New designation established in accordance with Practice E 527 and SAEJ 1086, Practice for Numbering Metals and Alloys (UNS).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custome
15、r Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.1 ASTM designation,4.1.2 UNS numbe
16、r,4.1.3 SectionRod (round) or bar (square or rectangular),4.1.4 Dimensions, including length,4.1.5 Condition (see 1.1.1, 1.1.2, and appendix),4.1.5.1 If neither grade of N06625 is specified, Grade 1 willbe supplied,4.1.6 Finish (Section 8),4.1.7 QuantityFeet (or metres) or number of pieces,4.1.8 Cer
17、tification State if certification is required (seeSection 15),4.1.9 Samples for Product (Check) AnalysisState whethersamples for product (check) analysis should be furnished (see5.2), and4.1.10 Product Marking (see Section 16)State productmarking requirements.4.1.11 Purchaser Inspection (see Section
18、 13)If purchaserwishes to witness tests or inspection of material at place ofmanufacture, the purchase order must so state, indicatingwhich test or inspections are to be witnessed.5. Chemical Composition5.1 The material shall conform to the composition limitsspecified in Table 2.5.2 If a product (ch
19、eck) analysis is performed by thepurchaser, the material shall conform to the product (check)analysis variations in Specification B 880.6. Mechanical Properties and Other Requirements6.1 Mechanical PropertiesThe material shall conform tothe heat treatment and room temperature tensile propertiespresc
20、ribed in Table 1.7. Dimensions and Permissible Variations7.1 Diameter, Thickness, or WidthThe permissible varia-tions from the specified dimensions of cold-worked rod shallbe as prescribed in Table 3, and of hot-worked rod and bar asprescribed in Table 4.7.2 Out-of-Round Hot-worked rods and cold-wor
21、ked 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 Tables 3 and 4, except forhot-worked rods12 in. (12.7 mm) in diameter and under, whichmay be out-of-round by the total permissible va
22、riations indiameter shown in Table 4.TABLE 1 Conditions for Hot-Worked Rod and Bar and Cold-Worked RodADiameter or DistanceBetween ParallelSurfaces, in. (mm)TensileStrengthmin, ksi(MPa)YieldStrength(0.2 % offset),min, ksi (MPa)Elongationin 2 in. or50 mm or4D,min,%UNS N06625 Grade 1 (Annealed)BUp to
23、4 (102), incl 120 60 30Over 4 (102) to 10 (254),incl110 50 25UNS N06625 Grade 2 (Solution Annealed)CAll sizes 100 40 30UNS N06219 All (Solution Annealed)All sizes 96 (600) 39 (270) 50UNS N06650 All (Solution Annealed)All sizes 116 (800) 58 (400) 45AForging quality is furnished to chemical requiremen
24、ts and surface inspectiononly. No tensile properties are required. Forging stock is typically supplied in thehot worked condition, (see X1.1.5).BAnnealed 1600F (871C) minimum.CSolution annealed at 2000F (1093C) minimum, with or without subsequentstabilization anneal at 1800F (982C) minimum to increa
25、se resistance to sensi-tization.TABLE 2 Chemical RequirementsElementCompositionLimits, %N06625 N06219 N06650Carbon 0.10 max 0.05 max 0.03 maxManganese 0.50 max 0.50 max 0.50 maxSilicon 0.50 max 0.70-1.10 0.50 maxPhosphorus 0.015 max 0.020 max 0.020 maxSulfur 0.015 max 0.010 max 0.010 maxChromium 20.
26、0 min 18.0-22.0 19.0-21.023.0 max . .Columbium + tantalum 3.15 min . 0.05-0.504.15 max .Cobalt (if determined) 1.0 max 1.0 max 1.0 maxMolybdenum 8.0 min 7.0-9.0 9.5-12.510.0 max . .Iron 5.0 max 2.0-4.0 12.0-16.0Aluminum 0.40 max 0.50 max 0.05-0.50Titanium 0.40 max 0.50 max .Copper . 0.50 max 0.30 ma
27、xNickelA58.0 min Bal. Bal.Tungsten . . 0.50-2.50Nitrogen . . 0.05-0.20AElement shall be determined arithmetically by difference.TABLE 3 Permissible Variations in Diameter of Cold-Worked RodSpecified Dimension,in. (mm)Permissible Variations from SpecifiedDimension, in. (mm)Plus Minus116 (1.6) to316 (
28、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)TABLE 4 Permissible Variations in Diameter or Dista
29、nceBetween Parallel Surfaces of Hot-Worked Rod and BarSpecified Dimension,in. (mm)APermissible Variations fromSpecified Dimensions, in.(mm)Plus MinusRod and bar, hot-worked:1 (25.4) and underOver 1 (25.4) to 2 (50.8), incl0.016 (0.41)0.031 (0.79)0.016 (0.41)0.016 (0.41)Over 2 (50.8) to 4(101.6), inc
30、l0.047 (1.19) 0.031 (0.79)Over 4 (101.6) 0.125 (3.18) 0.063 (1.60)Rod, rough-turned orground:Under 1 (25.4) 0.005 (0.13) 0.005 (0.13)1 (25.4) and over 0.031 (0.79) 0Forging quantity rod:BUnder 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
31、 distance between parallel surfaces ofsquares, and separately to width and thickness of rectangles.BSpot grinding is permitted to remove minor surface imperfections. The depthof these spot ground areas shall not exceed 3 % of the diameter of the rod.B 446 03 (2008)27.3 Machining Allowances for Hot-W
32、orked MaterialsWhen the surfaces of hot-worked products are to be machined,the allowances prescribed in Table 5 are recommended fornormal machining operations.7.4 LengthThe permissible variations in length of cold-worked and hot-worked rod and bar shall be as prescribed inTable 6.7.4.1 Rods and bars
33、 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 ormachined ends.7.5 Straightness:7.5.1 The permissible variations in straightness of cold-worked rod as determined by the departure from st
34、raightnessshall be as prescribed in Table 7.7.5.2 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,smoo
35、th, 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 thickness,and condition.9.
36、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 except that a single piece weighingover 500 lb (227 kg) shall be considered as one lot.TABLE 5 Normal Machining Allowances for Hot-Worked MaterialFinished-
37、Machined Dimensions for Finishes AsIndicated below, in. (mm)ANormal Machining Allowance, in. (mm)On Diameter,For RodsDistance BetweenParallel Surfacesof 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), i
38、ncl18 (3.2)316 (4.8)18 (3.2)316 (4.8)Over 178 to 278 (47.6 to 73.0), incl316 (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 (9.5)Hot-worked rods, rough-turned or rough ground:C1516 to 4 (23.8 to 101.6), incl in diameter116 (1.6)
39、 . . .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 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
40、 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 m
41、ay 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 BarsRandom mill lengths:Hot-workedA6 to 24 ft (1.83 to 7.31 m) long with not more than 25 weight % between 6 and 9 ft
42、(1.83 and 2.74 m).BCold-worked6 to 20 ft (1.83 to 6.1 m) long with not more than 25 weight % between 6 and 10 ft (1.83 and 3.05 m).Multiple lengthsFurnished in multiples of a specified unit length, within the length limits indicated above. For each multiple, an allowance of14 in. (6.4 mm) will be ma
43、de forcutting, unless otherwise specified. At the manufacturers option, individual specified unit lengths may be furnished.Nominal lengthsSpecified nominal lengths having a range of not less than 2 ft. (610 mm) with no short lengths allowed.ACut lengthsA specified length to which all rods and bars w
44、ill be cut with a permissible variation of plus18 in. (3.2 mm), minus 0 for sizes 8 in. (203 mm) and less indiameter or distance between parallel surfaces. For larger sizes, the permissible variation shall be +14 in. (6.4 mm), 0.AFor cold-worked rod under12 in. (12.7 mm) in diameter ordered to nomin
45、al or stock lengths with a 2-ft (610-mm) range, at least 93 % of such material shall be withinthe range specified; the balance may be in shorter lengths but in no case shall lengths less than 4 ft (1220 mm) be furnished.BFor hot-worked sections weighing over 25 lb/ft (37 kg/m) and for smooth forged
46、products, all sections, short lengths down to 2 ft (610 mm) may be furnished.TABLE 7 Permissible Variations in Straightness of Cold-WorkedRodsSpecified Diameter, in. (mm)APermissible Variations, in. (mm)Depth of Chord:12 (12.7) to 212 (63.5), incl 0.030 (0.76) per ft (305 mm) of lengthAMaterial unde
47、r12 in. (12.7 mm) shall be reasonably straight and free of sharpbends and kinks.TABLE 8 Permissible Variations in Straightness of Hot-WorkedRods and BarsAFinish Permissible Variations, in./ft (mm/m)BRods and bars, hot-worked 0.050 (4.2)CRoundshot-worked, rough ground orrough turned0.050 (4.2)CANot a
48、pplicable to forging quality.BMaterial under12 in. (12.7 mm) shall be reasonably straight and free of sharpbends and kinks.CThe maximum curvature (depth of chord) shall not exceed the values indicatedmultiplied by the length in feet.B 446 03 (2008)39.2 Test Material Selection:9.2.1 Chemical Analysis
49、Representative samples 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 each 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
