ASTM B853-16(2021)e1

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Designation:B853 −16 (Reapproved 2021)
Standard Specification for
Powder Metallurgy (PM) Boron Stainless Steel Structural
Components
This standard is issued under the fixed designation B853; 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 (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Editorial changes were made in 3.1 and the Supplementary Requirements section in September 2021.
1. Scope* E354 Test Methods for Chemical Analysis of High-
Temperature,Electrical,Magnetic,andOtherSimilarIron,
1.1 This specification covers stainless steel powder metal-
3 Nickel, and Cobalt Alloys
lurgy (PM) structural components with a 7.7-g/cm minimum
E572 Test Method forAnalysis of Stainless andAlloy Steels
density that are fabricated from prealloyed powder consisting
2 byWavelengthDispersiveX-RayFluorescenceSpectrom-
primarily of iron, chromium, nickel, molybdenum, and boron
etry
and are intended for use in corrosive service.
E1019 Test Methods for Determination of Carbon, Sulfur,
1.2 With the exception of the values for density and the
Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt
mass used to determine density, for which the use of the gram
Alloys by Various Combustion and Inert Gas Fusion
per cubic centimetre (g/cm ) and gram (g) units is the long-
Techniques
standingindustrypractice,thevaluesininch-poundunitsareto
E1086 TestMethodforAnalysisofAusteniticStainlessSteel
be regarded as standard. The values given in parentheses are
by Spark Atomic Emission Spectrometry
mathematical conversions to SI units that are provided for
G48 Test Methods for Pitting and Crevice Corrosion Resis-
information only and are not considered standard.
tance of Stainless Steels and Related Alloys by Use of
1.3 This international standard was developed in accor-
Ferric Chloride Solution
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
3. Terminology
Development of International Standards, Guides and Recom-
3.1 Definitions—Definitions of powder metallurgy terms
mendations issued by the World Trade Organization Technical
can be found in Terminology B243. Additional descriptive
Barriers to Trade (TBT) Committee.
information is available under “General Information on PM”
on the ASTM B09 web page.
2. Referenced Documents
2.1 ASTM Standards:
4. Ordering Information
A262 Practices for Detecting Susceptibility to Intergranular
4.1 Orders for components under this specification shall
Attack in Austenitic Stainless Steels
include the following information:
B117 Practice for Operating Salt Spray (Fog) Apparatus
B243 Terminology of Powder Metallurgy 4.1.1 Dimensions (see Section 9),
B311 Test Method for Density of Powder Metallurgy (PM) 4.1.2 Chemical composition (see Section 6, 10.1, and Table
Materials Containing Less Than Two Percent Porosity
1),
E8 Test Methods for Tension Testing of Metallic Materials
4.1.3 Density (see Section 7),
[Metric] E0008_E0008M
4.1.4 Mechanical properties (see Section 8, 10.2, and Table
2),
4.1.5 Certification (see Section 13),
This specification is under the jurisdiction ofASTM Committee B09 on Metal
Powders and Metal Powder Products and is the direct responsibility of Subcom-
4.1.6 Reference to the standard.
mittee B09.11 on Near Full Density Powder Metallurgy Materials.
Current edition approved Sept. 1, 2021. Published September 2021. Originally
5. Materials and Manufacture
approved in 1994. Last previous edition approved in 2016 as B853 – 16. DOI:
10.1520/B0853-16R21E01.
5.1 Structural components shall be made by cold pressing
U.S. Patents 3980444, 4014680, 4032336.
and sintering prealloyed powder.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.2 The sintering temperature is dependent on the chemical
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. composition of the powder.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B853−16 (2021)
TABLE 1 Chemical Composition Requirements
for as-sintered standard flat unmachined tension test specimens
Element Composition Limits, Mass % for powder metallurgy (PM) products (see Test Methods E8)
Carbon 0.05 max are in Table 2.
Manganese 2.00 max
Phosphorus 0.03 max
9. Dimensions and Tolerances
Sulfur 0.03 max
Silicon 1.0 max 9.1 Dimensions and tolerances of the structural components
Chromium 22.0 to 24.0
shall be indicated on drawings accompanying the purchase
Nickel 17.0 to 19.0
order or contract.
Molybdenum 3.0 to 4.0
Boron 0.20 to 0.50
Nitrogen 0.10 max 10. Sampling
A
Iron balance
10.1 Chemical Analysis—If required by purchase
A
Iron shall be determined arithmetically by difference.
agreement, at least one sample for chemical analysis shall be
taken from each lot. A representative sample of chips may be
A obtained by dry-milling, drilling, or crushing at least two
TABLE 2 Typical Mechanical Properties
pieces withou
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