1、Designation: F1314 13F1314/F1314M 13aStandard Specification forWrought Nitrogen Strengthened 22 Chromium13 Nickel5Manganese2.5 Molybdenum Stainless Steel Alloy Bar andWire for Surgical Implants (UNS S20910)1This standard is issued under the fixed designation F1314;F1314/F1314M; the number immediatel
2、y following the designation indicatesthe year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This spec
3、ification covers the chemical, mechanical, and metallurgical requirements for wrought nitrogen strengthened 22chromium 13 nickel 5 manganese 2.5 molybdenum stainless steel alloy bar and wire for surgical implants.1.2 The values stated in either SI units or inch-pound units are to be regarded separat
4、ely as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.2. Referenced Documents2.1 ASTM Standards:2A262 Practices for Detecting
5、 Susceptibility to Intergranular Attack in Austenitic Stainless SteelsA484/A484M Specification for General Requirements for Stainless Steel Bars, Billets, and ForgingsA555/A555M Specification for General Requirements for Stainless Steel Wire and Wire RodsA751 Test Methods, Practices, and Terminology
6、 for Chemical Analysis of Steel ProductsE8/E8M Test Methods for Tension Testing of Metallic MaterialsE10 Test Method for Brinell Hardness of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data to Determine Conformance w
7、ith SpecificationsE45 Test Methods for Determining the Inclusion Content of SteelE112 Test Methods for Determining Average Grain SizeE354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, andCobalt AlloysE407 Practice for Microetching Metal
8、s and AlloysF138 Specification for Wrought 18Chromium-14Nickel-2.5Molybdenum Stainless Steel Bar and Wire for Surgical Implants(UNS S31673)F746 Test Method for Pitting or Crevice Corrosion of Metallic Surgical Implant MaterialsIEEE/ASTM SI 10 American National Standard for Metric Practice2.2 Aerospa
9、ce Materials Specification:3AMS 2248 Chemical Check Analysis Limits, Corrosion and Heat Resistant Steels and Alloys, Maraging and OtherHighly-Alloyed Steels, and Iron AlloysAMS 2630 Inspection, Ultrasonic Product Over 0.5 inch (12.7 mm) ThickAMS 2632 Ultrasonic Inspection of Thin Materials2.3 ISO St
10、andards:4ISO 6892 Metallic Materials Tensile Testing at Ambient TemperatureISO 9001 Quality Management SystemsRequirements1 This specification is under the jurisdiction of ASTM Committee F04 on Medical and Surgical Materials and Devices and is the direct responsibility of SubcommitteeF04.12 on Metal
11、lurgical Materials.Current edition approved April 1, 2013Oct. 1, 2013. Published April 2013November 2013. Originally approved in 1990. Last previous edition approved in 20072013 asF1314 07.F1314 13. DOI: 10.1520/F1314-13.10.1520/F1314_F1314M-13A.2 For referencedASTM standards, visit theASTM website,
12、 www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http:/www.
13、sae.org.4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous ver
14、sion. 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 considered the official document.*A Summary of Changes sec
15、tion appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 bar, nround bars and flats from 0.1875 in. 4.75 mm to 4.00 in. 101.60 mm in
16、 diameter or thickness (other sizes andshapes by special order).3.1.2 forging bar, nas described in 3.1.2 used for production of forgings, may be furnished in the hot rolled condition.3.1.3 lot, nthe total number mill products produced under the same melt heat under the same conditions at essentiall
17、y the sametime.3.1.4 wire, nrounds less than 0.1875 in. 4.75 mm in diameter.4. Ordering Information4.1 Inquiries and orders for material under this specification shall include the following information:4.1.1 Quantity;4.1.2 ASTM designation and date of issue;4.1.3 Mechanical properties (if applicable
18、 for special conditions);4.1.4 Form (bar or wire);4.1.5 Applicable dimensions including size, thickness, width, and length (exact, random, or multiples) or drawing number;4.1.6 Tolerancesunless otherwise specified by purchaser, tolerances must meet the requirements of Specification A484/A484M, A555/
19、A555M, or both, as applicable;4.1.7 Condition (see 5.1);4.1.8 Finish (see 5.2);4.1.9 Special tests (if any); and4.1.10 Other requirements.5. Materials and Manufacture5.1 ConditionBar and wire shall be furnished in the hot-worked, annealed, or cold-worked condition, as specified.5.2 FinishBar and wir
20、e shall be furnished bright annealed, cold drawn, pickled, ground, or ground and polished, as specifiedby the purchaser.6. Chemical Requirements6.1 The suppliers heat analysis shall conform to the chemical requirements prescribed in Table 1. The supplier shall not shipmaterial with chemistry outside
21、 the requirements specified in Table 1.6.1.1 Requirements for the major and minor elemental constituents are listed in Table 1. Also listed are important residualelements. Analysis for elements not listed in Table 1 is not required to verify compliance with this specification.6.1.2 Methods and pract
22、ices relating to chemical analysis required by this specification shall be in accordance withTest MethodsA751.6.2 Product AnalysisThe product analysis is either for the purpose of verifying the composition of a heat or manufacturinglot or to determine variations in the composition within the heat.6.
23、2.1 Acceptance or rejection of a heat or lot of material may be made by the purchaser on the basis of this product analysis.6.2.2 Product analysis tolerances do not broaden the specified heat analysis requirements but cover variations betweenlaboratories in the measurement of chemical content. Produ
24、ct analysis limits shall be as specified in Table 2.TABLE 1 Chemical CompositionElement Composition, %(Mass/Mass)Carbon 0.030 maxManganese 4.00 to 6.00Phosphorus 0.025 maxSulfur 0.010 maxSilicon 0.75 maxChromium 20.50 to 23.50Nickel 11.50 to 13.50Molybdenum 2.00 to 3.00Nitrogen 0.20 to 0.40Niobium 0
25、.10 to 0.30Vanadium 0.10 to 0.30Copper 0.50 maxIron balanceAA Approximately equal to the difference of 100 % and the sum percentage of theother specified elements. Reporting of the iron difference is not required.F1314/F1314M 13a26.2.3 Methods and practices relating to chemical analysis required by
26、this specification shall be in accordance withTest MethodsE354.7. Metallurgical Requirements7.1 The material shall contain no delta ferrite, chi, or sigma phases when it is examined metallographically at 100magnification in accordance with Practice E407.7.2 The microcleanliness of the material, as d
27、etermined by Practice E45, Method A, except using Plate Ir, on representativebillet or bar samples from the heat shall not exceed the following:InclusionTypeA(Sulfide)B(Alumina)C(Silicate)D (GlobularOxide)ThinHeavy1.51.52.51.52.51.52.51.58. Mechanical Requirements8.1 Tensile Properties:8.1.1 Tensile
28、 properties shall be determined in accordance with Test Methods E8/E8M.8.1.2 The mechanical properties of test specimens shall conform to the requirements specified in Table 3.8.2 Hardness:8.2.1 Hardness values shall be determined in accordance with Test Method E10 or Test Methods E18.8.2.2 When des
29、ired, hardness limits may be specified by the purchaser. Hardness determinations shall be made on a productcross section, midway between the center and surface, if the cross section is adequate.8.3 Number of TestsBar, Forging Bar, Shapes and Wire:TABLE 2 Product Analysis TolerancesAElementPermissibl
30、e VariationUnder theMinimum Limit or Overthe Maximum Limit,% (Mass/Mass)BCarbon 0.005ManganeseC 0.05Phosphorus 0.005Sulfur 0.005Silicon 0.05Chromium 0.25Nickel 0.15Molybdenum 0.10NitrogenC 0.02 under min;0.04 over maxNiobium 0.05Vanadium 0.03Copper 0.03ARefer to AMS 2248 for chemical check analysis
31、limits (except nitrogen).BFor elements in which only a maximum percentage is indicated, the “underminimum limit” is not applicable.CThe specified range for this element is not covered byAMS 2248 and permissiblevariation has been established through industrial practice.TABLE 3 Mechanical Requirements
32、, Bar and WireCondition Diameter or Thickness,in. mmUltimate TensileStrength, min,psi MPaYield Strength(0.2 % Offset),min, psi MPaElongationAmin, %BrinellB Hardness,max, HBHot-workedC Up to 2 50.8D , incl . . . 325Annealed All 100 000 690 55 000 380 35 .Cold-worked 0.063 to 0.750 1.59 to19.1D , incl
33、150 000 1035 125 000 862 12 .AElongation of material 0.063 in. 1.6 mm or greater in diameter (D) or width (W) shall be measured using a gauge length of 2 in. or 4D or 4W. The gauge length shallbe reported with the test results. The method for determining elongation of material under 0.063 in. 1.6 mm
34、 in diameter or thickness may be negotiated. Alternatively, agauge length corresponding to ISO 6892 (5.65 times the square root of So, where So is the original cross sectional area) may be used when agreed upon between thesupplier and purchaser.B3000-kgf 29 430 N load.CTypically supplied as-hot-roll
35、ed bar for forging applications.DOther sizes may be furnished by agreement between the supplier and the purchaser.F1314/F1314M 13a38.3.1 Perform tension testing per Test Methods E8/E8M. Should any of the test specimens not meet the specified requirements,test two additional test pieces representativ
36、e of the same lot, in the same manner, for each failed test piece. The lot shall beconsidered in compliance only if all additional test pieces meet the specified requirements.8.3.2 Tensile test results for which any specimen fractures outside the gauge length shall be considered acceptable if both t
37、heelongation and reduction of area meet the minimum requirements specified. Refer to subsections 7.11.4 and 7.11.5 of Test MethodE8/E8M. If either the elongation or reduction of area is less than the minimum requirement, discard the test and retest. Retest onespecimen for each specimen that did not
38、meet the minimum requirements.9. Dimensions and Permissible Variations9.1 Units of Measure:9.1.1 SelectionThis specification requires that the purchaser selects the units (SI or inch-pound) to be used for productcertification. In the absence of a stated selection of units on the purchase order, this
39、 selection may be expressed by the purchaserin several alternate forms listed in order of precedence.9.1.1.1 If the purchaser and supplier have a history of using specific units, these units shall continue to be certified untilexpressly changed by the purchaser.9.1.1.2 In the absence of historic pre
40、cedence, if the units used to define the product on the purchasers purchase order (PO),specification, and engineering drawing are consistent, these units shall be used by the supplier for product certification.9.1.1.3 If the purchasers selection of units is unclear, the units of measure shall be agr
41、eed upon between the purchaser andsupplier.9.1.2 Conversion of UnitsIf the suppliers test equipment does not report in the selected units, the test equipment units maybe converted to the selected units for certification purposes. Accurate arithmetic conversion and proper use of significant digitssho
42、uld be observed when performing this conversion. IEEE/ASTM SI 10 provides guidelines for the use of SI units. Annex Aof that standard provides conversion tables and Annex B provides rules for conversion and significance.10. Special Tests10.1 Bar and wire conforming to this specification shall be cap
43、able of passing the intergranular corrosion susceptibility test inaccordance with Practice E of Practices A262.10.2 Bar and wire conforming to this specification shall have a homogeneous microstructure with an average grain size ofASTM No. 5 or finer when measured in accordance with Test Method E112
44、.10.2.1 If samples are selected after a final cold working, specimens shall be tested in accordance with Test Method E112 or asagreed between the supplier and purchaser.10.3 All centerless ground or peeled and polished round bar 0.375 in. 9.5 mm in nominal diameter shall be ultrasonicallyinspected a
45、t final diameter according to AMS 2630, Class A1. Equivalent test methods may be substituted when agreed upon bythe purchaser and supplier.NOTE 1AMS 2630 specifies a minimum size limit of 0.50 in. 12.7 mm. F04.12 committee has intentionally specified the use of AMS 2630 below0.50 in. 12.7 mm based o
46、n the experience of users and producers on the committee. There is disagreement in the industry as to whether AMS 2632,which does apply to sizes under 0.50 in. 12.7 mm, applies to solid round bar.10.4 Billet shall also be ultrasonically testedinspected prior to being hot rolled and should be free of
47、 internal defects. ifultrasonic inspection is not performed at a final diameter as specified in 10.3. Acceptance criteria shall be agreed to between thepurchaser and supplier.10.4.1 Alternatively, the purchaser may request that billet be ultrasonically inspected prior to being hot rolled even if ult
48、rasonicinspection is performed at a final diameter. Acceptance criteria shall be agreed to between the purchaser and supplier.10.5 Any other special requirements shall be specified by the purchaser.11. Significance of Numerical Limits11.1 The following applies to all specified numerical limits in th
49、is specification. To determine conformance to these limits, anobserved or calculated value shall be rounded to the nearest unit in the last right hand digit used in expressing the specificationlimit, in accordance with the rounding of Practice E29.12. Certification12.1 The supplier shall provide a certification that the material was tested in accordance with this specification and met allrequirements. A report of the test results shall be furnished to the purchaser at the time of shipment.13. Quality Program R
