1、Designation:B88305 Designation: B883 10Standard Specification forMetal Injection Molding (MIM) Ferrous Materials1This standard is issued under the fixed designation B883; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、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. Scope1.1 This specification covers ferrous metal injection molded materials fabricated by mixing elemental or pre-alloyed metal
3、powders with binders, injecting into a mold, debinding, and sintering, with or without subsequent heat treatment.1.2 This specification covers the following injection molded materials.1.2.1 Compositions:1.2.1.1MIM-2200, low-alloy steel produced from admixtures of iron powder and other alloying eleme
4、nts such as nickel andmolybdenum.1.2.1.2MIM-2700, low-alloy steel produced from admixtures of iron powder, and other alloying elements such as nickel andmolybdenum.1.2.1.3MIM-4605, low-alloy steel produced from admixtures of iron powder and other alloying elements such as nickel,molybdenum, and carb
5、on.1.2.1.4MIM-316L, austenitic stainless steel produced from pre-alloyed powder or an admixture of powders.1.2.1.5MIM-17-4 PH, precipitation hardening stainless steel produced from prealloyed powder or an admixture of powders.1.2.1.6MIM-430L , ferritic stainless steel produced from pre-alloyed powde
6、r or an admixture of powders.1.2.1.1 MIM-2200, low-alloy steel1.2.1.2 MIM-2700, low-alloy steel1.2.1.3 MIM-4605, low-alloy steel1.2.1.4 MIM-4140, low-alloy steel1.2.1.5 MIM-316L, austenitic stainless steel1.2.1.6 MIM-17-4 PH, precipitation hardening stainless steel1.2.1.7 MIM-420, ferritic stainless
7、 steel1.2.1.8 MIM-430L, ferritic stainless steel1.3 Chemical composition limits are specified in Table 1.1.4Property values stated in inch-pound units are to be regarded as the standard. Conversions to SI units may be approximate.2. Referenced Documents2.1 ASTM Standards:2B243 Terminology of Powder
8、MetallurgyB311 Test Method for Density of Powder Metallurgy (PM) Materials Containing Less Than Two Percent PorosityB328Test Method for Density, Oil Content, and Interconnected Porosity of Sintered Metal Structural Parts and Oil-ImpregnatedBearingsB933 Test Method for Microindentation Hardness of Po
9、wder Metallurgy (PM) MaterialsB962 Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM) Products Using Archimedes PrincipleE8 Test Methods for Tension Testing of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic MaterialsE350 Test Methods for Chemical Analysis
10、of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and WroughtIronE415 Test Method for Atomic Emission Vacuum Spectrometric Analysis of Carbon and Low-Alloy SteelE1019 Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloy
11、s byVarious Combustion and Fusion Techniques1This specification is under the jurisdiction of ASTM Committee B09 on Metal Powders and Metal Powder Products and is the direct responsibility of SubcommitteeB09.11 on Near Full Density Powder Metallurgy Metals.Materials.Current edition approved MarchDec.
12、 1, 2005.2010. Published March 2005.2011. Originally approved in 1997. Last previous edition approved in 19972005 asB88397.B883 05. DOI: 10.1520/B0883-105.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of AST
13、M Standardsvolume information, refer to the standards Document Summary page on the ASTM website.1This 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 version. Becauseit may not be technically p
14、ossible 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700,
15、 West Conshohocken, PA 19428-2959, United States.E1086 Test Method for Atomic Emission Vacuum Spectrometric Analysis of Stainless Steel by Point-to-Plane ExcitationTechniqueE1621 Guide for X-Ray Emission Spectrometric AnalysisF1089 Test Method for Corrosion of Surgical Instruments2.2 MPIF Standards:
16、3MPIF Standard 35Standard 35, Material Standards for Metal Injection Molded PartsMPIFStandard 50, Method for Preparing and Evaluating Metal Injection Molded Debound and Sintered Tension Test SpecimensMPIFStandard 51, Determination of Microhardness of Powder Metallurgy MaterialsMPIFStandard 59, Deter
17、mination of Charpy Impact Energy of Unnotched Metal Injection Molded Test Specimens MPIFStandard 50 Method for Preparing and Evaluating Metal Injection Molded (MIM) Debound and Sintered/Heat TreatedTension Test SpecimensMPIF Standard 51 Method for Determination of Microindentation Hardness of Powder
18、 Metallurgy MaterialsMPIFStandard 62, Determination of the Corrosion Resistance of MIM Grades of Stainless Steel Immersed in 2% Sulfuric AcidSolution MPIF Standard 59 Method for Determination of Charpy Impact Energy of Unnotched Metal Injection Molded(MIM) Test SpecimensMPIFStandard 63, Density Dete
19、rmination of MIM Components (Gas Pycnometer) MPIF Standard 62 Method forDetermination of the Corrosion Resistance of MIM Grades of Stainless Steel Immersed in 2 % Sulfuric Acid SolutionMPIF Standard 63 Method for Density Determination of Metal Injection Molded (MIM) Components (Gas Pycnometer)3. Ter
20、minology3.1 Definitions:3.1.1 Definitions of powder metallurgy terms can be found in Terminology B243.Additional descriptive information is availablein the Related Material Section of Vol. 02.05 of the Annual Book of ASTM Standards.4. Ordering Information4.1 Orders for parts conforming to this speci
21、fication may include the following:4.1.1 ASTM designation,4.1.2 Alloy composition including carbon content (see Table 1),4.1.3 Heat treatment condition and hardness (see Tables 2-5),4.1.4 Functional or mechanical property testing (see 7.3-7.7 and Tables 2-5),4.1.5 Corrosion resistance testing (see 8
22、.1-8.1.4 and Table 6),4.1.6 Purchaser or purchasers representative desire to witness the inspection and testing of material prior to shipment (see10.2),4.1.7 Requirement for certification of material and a report of test results (see 12.1),4.1.8 Requirement for full or partial chemical analysis (see
23、 Section 6), and4.1.9 Other special requirements as mutually agreed.5. Materials and Manufacture5.1 Parts shall be made by injection molding mixtures of metal powder with binders, debinding, and sintering, with or withoutsubsequent heat treatment. The material shall conform to the designations in 1.
24、2.1 and meet the chemical composition specifiedin Table 1.6. Chemical Composition6.1 Metal injection molded material shall conform to the chemical requirements prescribed in Table 1.6.2 Chemical analysis for the elements copper, chromium, molybdenum, and nickel shall be determined in accordance with
25、 TestMethods E415 (preferred method), E350, E1086, E1621, Inductively Coupled PlasmaAtomic Emission Spectrometry (ICP-AES),Atomic Absorption (AA), or any such method as shall be agreed upon between buyer and seller. Analysis of the element carbonshall be determined in accordance with Test Methods E1
26、019, via optical emission spectroscopy, or other method agreed uponbetween the purchaser and seller.7. Mechanical and Physical Property Requirements7.1 The preferred method of verifying the acceptable performance of a finished part is a qualification test to be performed onan actual part. The specif
27、ic test should be determined following consideration of the function of the part, and should be agreed uponbetween manufacturer and purchaser.7.2 Mandatory and typical mechanical properties of materials covered by this specification are shown in Tables 2-5.7.3 Tensile Properties:3Available from Meta
28、l Powder Industries Federation (MPIF), 105 College Road East, Princeton, NJ 085406692, USA.B883 1027.3.1 The tensile properties of MIM materials shall be measured using test specimens prepared and evaluated in accordance withMPIF Standard 50.7.3.2 Tensile Test MethodWhen requested in the purchase or
29、der, tensile specimens shall be prepared and processed along withproduction parts. Tensile specimens shall be tested in accordance with Test Methods E8. Yield strength shall be determined by the0.2 % offset method. MPIF Standard 50 governs the manufacture of the test bars, while Test Methods E8gover
30、ns the testingprocedure.7.4 Impact Energy Properties:7.4.1 Typical impact energy properties of materials covered by this specification are shown in Tables 2-5.7.4.2 The impact energy properties of MIM materials shall be measured using test specimens prepared and evaluated inaccordance with MPIF Stan
31、dard 59.7.4.3 Impact Energy Test MethodWhen requested in the purchase order, impact energy specimens shall be prepared andprocessed along with production parts.7.5 Density:7.5.1 The density of MIM materials shall be measured in accordance with Test Method B311 or MPIF Standard 63. If a testspecimen
32、gains mass when immersed in water, it shall be tested in accordance with Test Method B328B962.7.6 Apparent HardnessThe apparent hardness of MIM materials shall be measured in accordance with Test Methods E18.7.7 Microindentation HardnessThe microindentation hardness of MIM materials shall be measure
33、d in accordance with TestMethod B933 or MPIF Standard 51B311.8. Corrosion Resistance Requirements8.1 Corrosion Resistance:8.1.1 The preferred method of verifying the acceptable performance of a finished part is a qualification test to be performed onan actual part. The specific test should be determ
34、ined following consideration of the function of the part, and should be agreed uponbetween manufacturer and purchaser.8.1.2 Typical corrosion resistance of materials covered by this specification is shown in Table 6.8.1.3 The corrosion resistance of MIM materials shall be measured using test specime
35、ns prepared in accordance with MPIFStandard 59.8.1.4 Corrosion Resistance Test MethodWhen requested in the purchase order, corrosion resistance specimens shall beprepared and processed along with production parts. MPIF Standard 59 governs the manufacture of specimens, but Test MethodF1089 governs co
36、rrosion resistance testing for copper sulfate and boiling water. MPIF Standard 62governs corrosion resistancetesting for sulfuric acid.9. Sampling9.1 LotUnless otherwise specified, a lot is a quantity of product produced under similar conditions so that the product withinthe lot is expected to be ho
37、mogeneous in all significant attributes and submitted for inspection at one time.9.2 TestingThe manufacturer and purchaser shall mutually agree upon the number of specimens to represent the lot forqualification, chemical, mechanical, or corrosion resistance property testing.10. Inspection10.1 Inspec
38、tion of the parts supplied under this specification shall be the responsibility of the manufacturer or a mutually agreedupon third party.10.2 If the purchaser desires that a representative witness the inspection and testing of the material prior to shipment, such arequirement shall be part of the pu
39、rchase order.11. Rejection11.1 Parts that fail to conform to the requirements of this specification may be rejected. Rejection should be reported to themanufacturer or supplier promptly and in writing.12. Certification12.1 When specified in the purchase order, a manufacturers certification shall be
40、furnished to the purchaser that the parts weremanufactured, samples tested, and inspected in accordance with this specification and found to meet its requirements. Whenspecified in the purchase order, a report of the test results shall be furnished.13. Keywords13.1corrosion resistance; low alloy ste
41、els; mechanical properties; metal injection molding (MIM); metal injection molded parts;metal injection molded steels; metal powders; MIM; PIM; powder injection molding; sintered steels; stainless steels; unnotchedCharpy impact energy13.1 corrosion resistance; low-alloy steels; mechanical properties
42、; metal injection molded parts; metal injection molded steels;metal injection molding (MIM); metal powders; MIM; PIM; powder injection molding; sintered steels; stainless steels; unnotchedCharpy impact energyB883 103TABLE 1 Chemical Composition Requirements For Metal Injection Molded MaterialsMateri
43、alDesignationFe Ni Cr Co Mo C Cu Si Mn Nb + Ta V OtherMIM-2200 Min. Bal. 1.5 - - - - - - - - - -Max. Bal. 2.5 - - 0.5 0.1 - 1.0 - - - 1.0MIM-2700 Min. Bal. 6.5 - - - - - - - - - -Max. Bal. 8.5 - - 0.5 0.1 - 1.0 - - - 1.0MIM-4605 Min. Bal. 1.5 - - 0.2 0.4 - - - - - -Max. Bal. 2.5 - - 0.5 0.6 - 1.0 -
44、- - 1.0MIM-4140 Min. Bal. - 0.8 - 0.2 0.3 - - - - - -Max. Bal. - 1.2 - 0.3 0.5 - 0.6 1.0 - - 1.0MIM-316L Min. Bal. 10 16 - 2 - - - - - - -Max. Bal. 14 18 - 3 0.03 - 1.0 2.0 - - 1.0MIM-420 Min. Bal. - 12 - - 0.15 - - - - - -Max. Bal. - 14 - - 0.4 - 1.0 1.0 - - 1.0MIM-430L Min. Bal. - 16 - - - - - - -
45、 - -Max. Bal. - 18 - - 0.05 - 1.0 1.0 - - 1.0MIM-17-4PH Min. Bal. 3 15.5 - - - 3 - - 0.15 - -Max. Bal. 5 17.5 - - 0.07 5 1.0 1.0 0.45 - 1.0TABLE 2 Mandatory and Typical Mechanical and Physical Properties of Metal Injection Molded Low-Alloy SteelsAInch-Pound UnitsMaterialDesignationMinimum Mandatory
46、Values Typical Values Elastic Constants Typical ValuesTensile Properties Tensile Properties Density Hardness UnnotchedCharpyImpactEnergyBUltimateStrengthYieldStrengthElongationin1in.UltimateStrengthYieldStrengthElongationin1in.YoungsModulusPoissonsRatioMacro(apparent)Micro(converted)Cft-lbf103psi 10
47、3psi % 103psi 103psi % 106psi g/cm3RockwellMIM-2200(as-sintered)37 16 20 42 18 40 28 0.28 7.6 45 HRB N/D 100MIM-2700(as-sintered)55 30 20 60 37 26 28 0.28 7.6 69 HRB N/D 130MIM-4605(as-sintered)55 25 11 64 30 15 29 0.28 7.5 62 HRB N/D 50MIM-4605D(quenched andtempered)215 190 #1 240 215 2 29.5 0.28 7
48、.5 48 HRC 55 HRC 40MIM-4140(quenched andtempered)200 155 3 240 180 5 29.5 0.28 7.5 46 HRC N/D 55B883 104TABLE 3 Mandatory and Typical Mechanical and Physical Properties of Metal Injection Molded Low-Alloy SteelsASI UnitsMaterialDesignationMinimum Mandatory Values Typical Values Elastic Constants Typ
49、ical ValuesTensile Properties Tensile Properties Density Hardness UnnotchedCharpyImpactEnergyBUltimateStrengthYieldStrengthElongationin 25.4 mmUltimateStrengthYieldStrengthElongationin 25.4 mmYoungsModulusPoissonsRatioMacro(apparent)Micro(converted)CJMPa MPa % MPa MPa % GPa g/cm3RockwellMIM-2200(as-sintered)255 110 20 290 125 40 190 0.28 7.65 45 HRB N/D 135MIM-2700(as-sintered)380 205 20 415 255 26 190 0.28 7.6 69 HRB N/D 175MIM-4605(as-sintered)380 170 11 440 205 15 200 0.28 7.5 62 HRB N/D 70MIM-4605D(quenchedandtempered)1480 1310 1 1655 1480 2 205 0.28 7.5 48
