ASTM B883-97

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: B 883 – 97
Standard Specification for
Metal Injection Molding (MIM), Ferrous Structural Parts
This standard is issued under the fixed designation B 883; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope E 8 Test Methods forTensionTesting of Metallic Materials
E 18 Test Methods for Rockwell Hardness and Rockwell
1.1 This specification covers ferrous metal injection molded
Superficial Hardness of Metallic Materials
materials fabricated by mixing elemental or prealloyed metal
E 350 Test Method for Chemical Analysis of Carbon Steel,
powders with binders, injecting into a mold, debinding, and
Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and
sintering, with or without subsequent heat treatment.
Wrought Iron
1.2 This specification covers the following injection molded
E 415 Test Method for Optical Emission Vacuum Spectro-
materials.
metric Analysis of Carbon and Low-Alloy Steel
1.2.1 Compositions:
E 1019 Test Methods for Determination of Carbon, Sulfur,
1.2.1.1 MIM-2200 Low-alloy steel produced from admix-
Nitrogen, Oxygen, and Hydrogen in Steel and in Iron,
tures of iron powder and other alloying elements such as nickel
Nickel, and Cobalt Alloys
and molybdenum.
E 1479 Practice for Describing and Specifying Induction
1.2.1.2 MIM-2700 Low-alloy steel produced from admix-
Coupled Plasma Optical Emission Spectrometers
tures of iron powder, and other alloying elements such as
2.2 Other Test Methods and Standards:
nickel and molybdenum.
MPIF Standard 35, Material Standards for Metal Injection
1.2.1.3 MIM-4605 Low-alloy steel produced from admix-
Molded Parts
tures of iron powder and other alloying elements such as
MPIF Standard 50, Method for Preparing and Evaluating
nickel, molybdenum, and carbon.
Metal Injection Molded Debound and Sintered Tension
1.2.1.4 MIM-316LAustenitic stainless steel produced from
Test Specimens
prealloyed powder or an admixture of powders.
MPIF Standard 51, Determination of Microhardness of
1.2.1.5 MIM-17-4PHPrecipitationhardeningstainlesssteel
Powder Metallurgy Materials
produced from prealloyed powder or an admixture of powders.
NOTE 1—Compositional limits and impurity elements may be different 3. Terminology
from AISI limits. Chemical composition limits are specified in 6.1 and
3.1 Definitions:
Table 1.
3.1.1 Definitions of powder metallurgy terms can be found
1.3 Property values stated in English system units are the
in Terminology B 243. Additional descriptive information is
standard. Conversions to SI units may be approximate.
available in the Related Material Section of Vol. 02.05 of the
Annual Book of ASTM Standards.
2. Referenced Documents
2.1 ASTM Standards: 4. Ordering Information
B 243 Terminology of Powder Metallurgy
4.1 Orders for parts conforming to this specification may
B 311 Test Method for Density Determination for Powder
include the following:
Metallurgy (P/M) Materials Containing Less than Two
4.1.1 ASTM Designation,
Percent Porosity
4.1.2 Alloy composition including carbon content (see 6.1
B 328 Test Method for Density, Oil Content and Intercon-
and Table 1),
nected Porosity of Sintered Metal Structural Parts and Oil
4.1.3 Heat Treatment condition and hardness (see Tables
Impregnated Bearings
2-5),
1 3
This specification is under the jurisdiction of ASTM Committee B-9 on Metal Annual Book of ASTM Standards, Vol 03.01.
Powders and Metal Powder Products and is the direct responsibility of Subcom- Annual Book of ASTM Standards, Vol 03.05.
mittee B09.11 on Near Full Density Powder Metallurgy Metals. Annual Book of ASTM Standards, Vol 03.06.
Current edition approved Oct. 10, 1997. Published April 1998. Available from Metal Powder Industries Federation, 105 College Road East,
Annual Book of ASTM Standards, Vol 02.05. Princeton, NJ 08540–6692.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 883
TABLE 1 Chemical Requirements For Metal Injection Molded Parts
Material
Fe Ni Cr Mo C Cu Nb + Ta OTHER
Designation
MIM-2200 Min. Bal. 1.5 - 0.0 0.0 - - 0.0
Max. Bal. 2.5 - 0.5 0.1 - - 2.0
MIM-2700 Min. Bal. 6.5 - 0.0 0.0 - - 0.0
Max. Bal. 8.5 - 0.5 0.1 - - 2.0
MIM-4605 Min. Bal. 1.5 - 0.2 0.4 - - 0.0
Max. Bal. 2.5 - 0.5 0.6 - - 2.0
MIM-316L Min. Bal. 10.0 16.0 2.0 0.00 - - 0.0
Max. Bal. 14.0 18.0 3.0 0.03 - - 2.0
MIM-17-4PH Min. Bal. 3.0 15.5 - 0.00 3.0 0.15 0.0
Max. Bal. 5.0 17.5 - 0.07 5.0 0.45 2.0
A
TABLE 2 Mandatory and Typical Mechanical Properties of Metal Injection Molded Low-Alloy Steels
English Units
Material Designation Minimum Mandatory Values Typical Values Typical Values
Tensile Properties Tensile Properties Density Hardness
B
Ultimate Yield Elongation Ultimate Yield Elongation Apparent Matrix
Strength Strength in1in. Strength Strength in 1in.
3 3 3 3 3
10 psi 10 psi % 10 psi 10 psi % g/cm Rockwell
MIM-2200 37 16 20 42 18 40 7.6 45 HRB
MIM-2700 55 30 20 60 37 26 7.6 69 HRB
MIM-4605 55 25 11 64 30 15 7.5 62 HRB
C
MIM-4605-HT 215 190 - 240 215 2 7.5 48 HRC 55 HRC
A
Reprinted by permission from MPIF Standard 35, “Materials Standard for Metal Injection Molded Parts”, 1993/1994, Metal Powder Industries Federation, 105 College
Road East, Princeton, NJ 08540-6692.
Density determined in accordance with Test Methods B 311 and B 328. Apparent hardness determined in accordance with Test Methods E 18. Tensile properties
determined on test bars prepared in accordance with MPIF Standard 50 and tested in accordance with Test Method E 8.
B
Converted from HK Microhardness, MPIF Standard 51, Appendix B.
C
These data were measured on test bars tempered for 1 hour at 350°F.
A
TABLE 3 Mandatory and Typical Mechanical Properties of Metal Injection Molded Low-Alloy Steels
SI Units
Material Minimum Mandatory Values Typical Values Typical Values
Designation
Tensile Properties Tensile Properties Density Hardness
B
Ultimate Yield Elongation Ultimate Yield Elongation Apparent Matrix
Strength Strength % Strength Strength %
MPa MPa in 25.4 mm MPa MPa in 25.4 mm g/cm Rockwell
MIM-2200 255 110 20 290 125 40 7.6 45 HRB
MIM-2700 380 205 20 415 255 26 7.6 69 HRB
MIM-4605 380 170 11 440 205 15 7.5 62 HRB
C
MIM-4605-HT 1480 1310 - 1650 1480 2 7.5 48 HRC 55 HRC
A
ReprintedbypermissionfromMPIFStandard35,“MaterialsStandardsforMetalInjectionMoldedParts”,1993/1994,MetalPowderIndustriesFederation,105College
Road East, Princeton, NJ 08540–6692. S.I. values converted from English units in Table 2.
DensitydeterminedinaccordancewithTestMethodsB 311orB 328.ApparenthardnessdeterminedinaccordancewithTestMethodsE 18.Tensilepropertiesdetermined
on test bars prepared in accordance with MPIF Standard 50 and tested in accordance with Test Methods E 8.
B
Converted from HK Microhardness, MPIF Standard 51, Appendix B.
C
These data were measured on test bars tempered for 1 hour at 177°C
4.1.4 Functional or mechanical property tes
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