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ASTM B848-05

(Specification)

Specification for Powder Forged (P/F) Ferrous Materials

Specification for Powder Forged (P/F) Ferrous Materials

ABSTRACT
This specification covers the powder forged ferrous materials fabricated by hot densification of atomized prealloyed or iron powders and intended for use as structural parts. The strcutural parts shall be made by hot forging of powder metallurgy preforms in confined dies with or without subsequent heat treatment. The materials shall conform to the required chemical composition for nickel, molybdenum, manganese, copper, chromium, sulfur, silicon, phosphorus, carbon, and oxygen. The mechanical properties such as yield strength, elongation, Rockwell hardness, impact energy, compressive yield strength and fatigue shal be determined using the tensile test method, Charpy V-notch impact energy test method, and hardness test method. The materials shall conform to the required surface finger oxide penetration, interparticle oxide networks, decarburization depth, and nonmetallic inclusion level.
SCOPE
1.1 This specification covers powder forged ferrous materials fabricated by hot densification of atomized prealloyed or iron powders and intended for use as structural parts.
1.2 This specification covers powder forged parts made from the following materials:
1.2.1 CompositionsP/F-10XX Carbon Steel (produced from atomized iron powder and graphite powder),
P/F-10CXX Copper-Carbon Steel (produced from atomized iron powder, copper and graphite powders),
P/F-11XX Carbon Steel with manganese sulfide for enhanced machinability (produced from atomized iron powder, manganese sulfide, and graphite powders),
P/F-11CXX Copper-Carbon Steel with manganese sulfide for enhanced machinability (produced from atomized iron powder, copper, manganese sulfide, and graphite powders),
P/F-42XX Nickel-Molybdenum Steel (produced from prealloyed atomized iron-nickel-molybdenum powder and graphite powder),
P/F-46XX Nickel-Molybdenum Steel (produced from prealloyed atomized iron-nickel-molybdenum powder and graphite powder),
P/F-44XX Molybdenum Steel (produced from prealloyed atomized iron-molybdenum powder and graphite powder), and
P/F-49XX Molybdenum Steel (produced from prealloyed atomized iron-molybdenum powder and graphite powder). Note 1
Alloy composition designations are modifications of the AISI-SAE nomenclature. For example: 10CXX designates a plain carbon steel containing copper and XX amount of carbon. Compositional limits of alloy and impurity elements may be different from the AISI-SAE limits. Chemical composition limits are specified in Section . Note 2
XX designates the forged carbon content, in hundredths of a percent, that is specified by the purchaser for the application. For a given specified carbon content, the permissible limits shall be as specified in .
1.2.2 Grades Grade A
Density equivalent to a maximum of 0.5 % porosity. The minimum density of those sections of the powder forged part so designated by the applicable part drawing shall not be less than the value specified in . Grade B
Density equivalent to a maximum of 1.5 % porosity. The minimum density of those sections of the powder forged part so designated by the applicable part drawing shall not be less than the value specified in .
1.3 Property values stated in inch-pound units are the standard. Conversion factors to SI units may be approximate.

General Information

Status
Historical
Publication Date
30-Sep-2005
ICS
77.160 - Powder metallurgy
Technical Committee
B09 - Metal Powders and Metal Powder Products
Drafting Committee
B09.11 - Near Full Density Powder Metallurgy Materials
Current Stage
Ref Project

Relations

Replaces
ASTM B848-01 - Standard Specification for Powder Forged (P/F) Ferrous Structural Parts
Effective Date
01-Oct-2005
Replaced By
ASTM B848-10 - Specification for Powder Forged (P/F) Ferrous Materials
Effective Date
01-Dec-2010

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ASTM B848-05 - Specification for Powder Forged (P/F) Ferrous MaterialsASTM B848-05 - Specification for Powder Forged (P/F) Ferrous Materials
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ASTM B848-05 - Specification for Powder Forged (P/F) Ferrous Materials
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B848 – 05
Standard Specification for
1
Powder Forged (P/F) Ferrous Materials
This standard is issued under the fixed designation B848; 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.
1. Scope* 1.2.2 Grades:
1.2.2.1 Grade A—Density equivalent to a maximum of
1.1 This specification covers powder forged ferrous materi-
0.5 % porosity. The minimum density of those sections of the
als fabricated by hot densification of atomized prealloyed or
powder forged part so designated by the applicable part
iron powders and intended for use as structural parts.
drawing shall not be less than the value specified in Table 1.
1.2 This specification covers powder forged parts made
1.2.2.2 Grade B—Density equivalent to a maximum of
from the following materials:
1.5 % porosity. The minimum density of those sections of the
1.2.1 Compositions:
powder forged part so designated by the applicable part
1.2.1.1 P/F-10XX Carbon Steel (produced from atomized
drawing shall not be less than the value specified in Table 1.
iron powder and graphite powder),
1.3 Property values stated in inch-pound units are the
1.2.1.2 P/F-10CXX Copper-Carbon Steel (produced from
standard. Conversion factors to SI units may be approximate.
atomized iron powder, copper and graphite powders),
1.2.1.3 P/F-11XX Carbon Steel with manganese sulfide for
2. Referenced Documents
enhanced machinability(producedfromatomizedironpowder,
2
2.1 ASTM Standards:
manganese sulfide, and graphite powders),
A255 Test Methods for Determining Hardenability of Steel
1.2.1.4 P/F-11CXX Copper-Carbon Steel with manganese
B243 Terminology of Powder Metallurgy
sulfide for enhanced machinability (produced from atomized
B311 Test Method for Density of Powder Metallurgy (PM)
iron powder, copper, manganese sulfide, and graphite pow-
Materials Containing Less Than Two Percent Porosity
ders),
B795 Test Method for Determining the Percentage of Al-
1.2.1.5 P/F-42XX Nickel-Molybdenum Steel (produced
loyed or Unalloyed Iron Contamination Present in Powder
from prealloyed atomized iron-nickel-molybdenum powder
Forged (PF) Steel Materials
and graphite powder),
B796 Test Method for Nonmetallic Inclusion Content of
1.2.1.6 P/F-46XX Nickel-Molybdenum Steel (produced
Powders Intended for Powder Forging (PF) Applications
from prealloyed atomized iron-nickel-molybdenum powder
B797 Test Method for Surface Finger Oxide Penetration
and graphite powder),
Depth and Presence of Interparticle Oxide Networks in
1.2.1.7 P/F-44XX Molybdenum Steel (produced from pre-
Powder Forged (P/F) Steel Parts
alloyed atomized iron-molybdenum powder and graphite pow-
B934 Test Method for Effective Case Depth of Ferrous
der), and
Powder Metallurgy (P/M) Parts Using Microindentation
1.2.1.8 P/F-49XX Molybdenum Steel (produced from pre-
Hardness Measurements
alloyed atomized iron-molybdenum powder and graphite pow-
E3 Guide for Preparation of Metallographic Specimens
der).
E8 Test Methods for Tension Testing of Metallic Materials
NOTE 1—Alloy composition designations are modifications of the
E18 Test Methods for Rockwell Hardness of Metallic Ma-
AISI-SAE nomenclature. For example: 10CXX designates a plain carbon
terials
steel containing copper and XX amount of carbon. Compositional limits
E23 Test Methods for Notched Bar Impact Testing of
ofalloyandimpurityelementsmaybedifferentfromtheAISI-SAElimits.
Metallic Materials
Chemical composition limits are specified in Section 6.
E29 Practice for Using Significant Digits in Test Data to
NOTE 2—XX designates the forged carbon content, in hundredths of a
percent, that is specified by the purchaser for the application. For a given Determine Conformance with Specifications
specifiedcarboncontent,thepermissiblelimitsshallbeasspecifiedin6.2.
E350 Test Methods for ChemicalAnalysis of Carbon Steel,
Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and
Wrought Iron
1
This specification is under the jurisdiction ofASTM Committee B09 on Metal
Powders and Metal Powder Products and is the direct responsibility of Subcom-
mittee B09.11 on Near Full Density Powder Metallurgy Materials.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2005. Published October 2005. Originally
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1994. Last previous edition approved in 2001 as B848 – 01. DOI:
Standards volume information, refer to the standard’s Document Summary page on
10.1520/B0848-05.
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 10
...

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