ASTM B988-18

Standard Specification for Powder Metallurgy (PM) Titanium and Titanium Alloy Structural Components

ABSTRACT
This specification covers powder metallurgy (PM) structural components fabricated from commercially pure (CP) (that is, unalloyed) titanium powder, pre-alloyed powders, and mixtures of elemental powders or mixtures of elemental powders and pre-alloyed powders. It addresses ordering information, materials and manufacture, chemical composition requirements, tensile requirements, physical properties, mechanical properties, dimensions, mass, permissible variations, sampling, inspection, and certification.
SCOPE
1.1 This specification covers powder metallurgy (PM) structural components fabricated from:  
1.1.1 Commercially pure (CP) (that is, unalloyed) titanium powder,  
1.1.2 Pre-alloyed powders.  
1.1.3 Mixtures of elemental powders or mixtures of elemental powders and pre-alloyed powders.  
1.2 This specification covers:  
1.2.1 Grade 1 PM—Unalloyed titanium,  
1.2.2 Grade 2 PM—Unalloyed titanium,  
1.2.3 Grade 3 PM—Unalloyed titanium,  
1.2.4 Grade 4 PM—Unalloyed titanium,  
1.2.5 Grade 5 PM—Titanium alloy (6 % aluminum, 4 % vanadium),  
1.2.6 Grade 9 PM—Titanium alloy (3 % aluminum, 2.5 % vanadium),  
1.2.7 Ti-6Al-4V PM Low Interstitial (LI),  
1.2.8 Ti-6Al-6V-2Sn PM.  
1.3 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2018
• ICS: 77.160 - Powder metallurgy
• Technical Committee: B09 - Metal Powders and Metal Powder Products
• Drafting Committee: B09.11 - Near Full Density Powder Metallurgy Materials

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:B988 −18
Standard Specification for
Powder Metallurgy (PM) Titanium and Titanium Alloy
1
Structural Components
This standard is issued under the fixed designation B988; 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* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 Thisspecificationcoverspowdermetallurgy(PM)struc-
B243 Terminology of Powder Metallurgy
tural components fabricated from:
B311 Test Method for Density of Powder Metallurgy (PM)
1.1.1 Commercially pure (CP) (that is, unalloyed) titanium
Materials Containing Less Than Two Percent Porosity
powder,
B348 Specification for Titanium and Titanium Alloy Bars
1.1.2 Pre-alloyed powders.
and Billets
1.1.3 Mixturesofelementalpowdersormixturesofelemen-
B923 Test Method for Metal Powder Skeletal Density by
tal powders and pre-alloyed powders.
Helium or Nitrogen Pycnometry
1.2 This specification covers:
B962 Test Methods for Density of Compacted or Sintered
1.2.1 Grade 1 PM—Unalloyed titanium,
Powder Metallurgy (PM) Products Using Archimedes’
1.2.2 Grade 2 PM—Unalloyed titanium,
Principle
1.2.3 Grade 3 PM—Unalloyed titanium, E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
1.2.4 Grade 4 PM—Unalloyed titanium,
E29 Practice for Using Significant Digits in Test Data to
1.2.5 Grade 5 PM—Titanium alloy (6 % aluminum, 4 %
Determine Conformance with Specifications
vanadium),
E539 TestMethodforAnalysisofTitaniumAlloysbyX-Ray
1.2.6 Grade 9 PM—Titanium alloy (3 % aluminum, 2.5 %
Fluorescence Spectrometry
vanadium),
E1409 Test Method for Determination of Oxygen and Nitro-
1.2.7 Ti-6Al-4V PM Low Interstitial (LI),
gen in Titanium and TitaniumAlloys by Inert Gas Fusion
1.2.8 Ti-6Al-6V-2Sn PM.
E1447 Test Method for Determination of Hydrogen in Tita-
1.3 The values stated in SI units are to be regarded as the
nium and Titanium Alloys by Inert Gas Fusion Thermal
standard. No other units of measurement are included in this
Conductivity/Infrared Detection Method
standard.
E1941 Test Method for Determination of Carbon in Refrac-
tory andReactive Metals andTheirAlloys byCombustion
1.4 This standard does not purport to address all of the
Analysis
safety concerns, if any, associated with its use. It is the
E2371 Test Method for Analysis of Titanium and Titanium
responsibility of the user of this standard to establish appro-
Alloys by Direct Current Plasma and Inductively Coupled
priate safety, health, and environmental practices and deter-
Plasma Atomic Emission Spectrometry (Performance-
mine the applicability of regulatory limitations prior to use.
Based Test Methodology)
1.5 This international standard was developed in accor-
E2626 Guide for Spectrometric Analysis of Reactive and
dance with internationally recognized principles on standard-
3
Refractory Metals (Withdrawn 2017)
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3. Terminology
mendations issued by the World Trade Organization Technical
3.1 Definitions—Definitions of powder metallurgy terms
Barriers to Trade (TBT) Committee.
can be found in Terminology B243.
1 2
This specification is under the jurisdiction ofASTM Committee B09 on Metal For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Powders and Metal Powder Products and is the direct responsibility of Subcom- contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
mittee B09.11 on Near Full Density Powder Metallurgy Materials. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Nov. 1, 2018. Published November 2018. Originally the ASTM website.
3
approved in 2013. Last previous edition approved in 2013 as B988 – 13. DOI: The last approved version of this historical standard is referenced on
10.1520/B988-18. www.astm.org.
*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
1

---------------------- Page: 1 ----------------------
B988−18
4. Ordering Information 7. Physical Properties
4.1 Orders for components under this specification should 7.1 Density—Thisspecificationcovershigh-andfull-density
include the following information, or portions of it, as agreed parts with no interconnected porosity.
to between purchaser and producer:
7.2 Minimum density shall be sufficient to meet the me-
4.2 Grade or alloy composition (see Section 6 and Table 1). chanical properties of Table 2 or as specified in the purchase
order or contract.
4.3 Mechanical propert
...

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 version. Because
it 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 version
of the standard as published by ASTM is to be considered the official document.
Designation: B988 − 13 B988 − 18
Standard Specification for
Powder Metallurgy (PM) Titanium and Titanium Alloy
1
Structural Components
This standard is issued under the fixed designation B988; 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 Scope*
1.1 This specification covers powder metallurgy (PM) structural components fabricated from:
1.1.1 Commercially pure (CP) (that is, unalloyed) titanium powder,
1.1.2 Pre-alloyed powders.
1.1.3 Mixtures of elemental powders or mixtures of elemental powders and pre-alloyed powders.
1.2 This specification covers:
1.2.1 Grade 1 PM—Unalloyed titanium,
1.2.2 Grade 2 PM—Unalloyed titanium,
1.2.3 Grade 3 PM—Unalloyed titanium,
1.2.4 Grade 4 PM—Unalloyed titanium,
1.2.5 Grade 5 PM—Titanium alloy (6%(6 % aluminum, 4%4 % vanadium),
1.2.6 Grade 9 PM—Titanium alloy (3%(3 % aluminum, 2.5%2.5 % vanadium),
1.2.7 Ti-6Al-4V PM Low Interstitial (LI),
1.2.8 Ti-6Al-6V-2Sn PM.
1.3 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B243 Terminology of Powder Metallurgy
B311 Test Method for Density of Powder Metallurgy (PM) Materials Containing Less Than Two Percent Porosity
B348 Specification for Titanium and Titanium Alloy Bars and Billets
B923 Test Method for Metal Powder Skeletal Density by Helium or Nitrogen Pycnometry
B962 Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM) Products Using Archimedes’ Principle
E8/E8M Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E539 Test Method for Analysis of Titanium Alloys by X-Ray Fluorescence Spectrometry
E1409 Test Method for Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by Inert Gas Fusion
E1447 Test Method for Determination of Hydrogen in Titanium and Titanium Alloys by Inert Gas Fusion Thermal
Conductivity/Infrared Detection Method
E1941 Test Method for Determination of Carbon in Refractory and Reactive Metals and Their Alloys by Combustion Analysis
1
This specification is under the jurisdiction of ASTM Committee B09 on Metal Powders and Metal Powder Products and is the direct responsibility of Subcommittee
B09.11 on Near Full Density Powder Metallurgy Materials.
Current edition approved April 1, 2013Nov. 1, 2018. Published May 2013November 2018. Originally approved in 2013. Last previous edition approved in 2013 as
B988 – 13. DOI: 10.1520/B988-13.10.1520/B988-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
1

---------------------- Page: 1 ----------------------
B988 − 18
E2371 Test Method for Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Plasma
Atomic Emission Spectrometry (Performance-Based Test Methodology)
3
E2626 Guide for Spectrometric Analysis of Reactive and Refractory Metals (Withdrawn 2017)
3. Terminology
3.1 Definitions—Definitions of powder metallurgy terms can be found in Terminology B243.
4. Ordering Information
4.1 Orders for components under this specification should include the following information, or portions of it, as agreed to
between purchaser and supplier:producer:
4.2 Grade or alloy composition (see Section 6 and T
...