ASTM B988-13

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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Mar-2013
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 −13
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 Materials Containing Less Than Two Percent Porosity
B348 Specification for Titanium and Titanium Alloy Bars
1.1 Thisspecificationcoverspowdermetallurgy(PM)struc-
and Billets
tural components fabricated from:
B923 Test Method for Metal Powder Skeletal Density by
1.1.1 Commercially pure (CP) (that is, unalloyed) titanium
Helium or Nitrogen Pycnometry
powder,
B962 Test Methods for Density of Compacted or Sintered
1.1.2 Pre-alloyed powders.
Powder Metallurgy (PM) Products Using Archimedes’
1.1.3 Mixturesofelementalpowdersormixturesofelemen-
Principle
tal powders and pre-alloyed powders.
E8/E8M Test Methods for Tension Testing of Metallic Ma-
1.2 This specification covers:
terials
1.2.1 Grade 1 PM—Unalloyed titanium,
E29 Practice for Using Significant Digits in Test Data to
1.2.2 Grade 2 PM—Unalloyed titanium,
Determine Conformance with Specifications
1.2.3 Grade 3 PM—Unalloyed titanium,
E539 TestMethodforAnalysisofTitaniumAlloysbyX-Ray
1.2.4 Grade 4 PM—Unalloyed titanium,
Fluorescence Spectrometry
1.2.5 Grade 5 PM—Titanium alloy (6% aluminum, 4%
E1409 Test Method for Determination of Oxygen and Nitro-
vanadium),
gen in Titanium and Titanium Alloys by the Inert Gas
1.2.6 Grade 9 PM—Titanium alloy (3% aluminum, 2.5%
Fusion Technique
vanadium),
E1447 Test Method for Determination of Hydrogen in Tita-
1.2.7 Ti-6Al-4V PM Low Interstitial (LI),
nium and Titanium Alloys by Inert Gas Fusion Thermal
1.2.8 Ti-6Al-6V-2Sn PM.
Conductivity/Infrared Detection Method
1.3 The values stated in SI units are to be regarded as the E1941 Test Method for Determination of Carbon in Refrac-
standard. No other units of measurement are included in this tory andReactive Metals andTheirAlloys byCombustion
Analysis
standard.
E2371 Test Method for Analysis of Titanium and Titanium
1.4 This standard does not purport to address all of the
Alloys by Atomic Emission Plasma Spectrometry (With-
safety concerns, if any, associated with its use. It is the
3
drawn 2013)
responsibility of the user of this standard to establish appro-
E2626 Guide for Spectrometric Analysis of Reactive and
priate safety and health practices and determine the applica-
Refractory Metals
bility of regulatory limitations prior to use.
3. Terminology
2. Referenced Documents
3.1 Definitions—Definitions of powder metallurgy terms
2
2.1 ASTM Standards:
can be found in Terminology B243.
B243 Terminology of Powder Metallurgy
B311 Test Method for Density of Powder Metallurgy (PM)
4. Ordering Information
4.1 Orders for components under this specification should
include the following information, or portions of it, as agreed
1
This specification is under the jurisdiction ofASTM Committee B09 on Metal
to between purchaser and supplier:
Powders and Metal Powder Products and is the direct responsibility of Subcom-
mittee B09.11 on Near Full Density Powder Metallurgy Materials.
4.2 Grade or alloy composition (see Section 6 and Table 1).
Current edition approved April 1, 2013. Published May 2013. DOI: 10.1520/
B988-13. 4.3 Mechanical properties (see Section 8 and Table 2).
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
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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B988−13
A
TABLE 1 Chemical Composition Requirements
NOTE 1—Additional compositions may be added with future revisions.
Residual
Composition, Weight % N, max C, max H, max Fe O, max Al V Sn Cu Cr Nb
max ea.
Grade 1 PM 0.03 0.08 0.015 0.20 max 0.18 — — — — — — 0.1
Grade 2 PM 0.03 0.08 0.015 0.30 max 0.25 — — — — — — 0.1
Grade 3 PM 0.05 0.08 0.015 0.30 max 0.35 — — — — — — 0.1
Grade 4 PM 0.05 0.08 0.015 0.50 max 0.40 — — — — — — 0.1
Grade 5 PM (Ti-6Al-4V) 0.05 0.08 0.015 0.40 max 0.30 5.50–6.75 3.50–4.50 — — — — 0.1
Grade 9 PM (Ti-3Al-2.5V) 0.03 0.08 0.015 0.25 max 0.30 2.50–3.50 2.00–3.00 — — — — 0.1
B
Ti-6Al-4V, LI 0.03 0.08 0.0125 0.25 max 0.20 5.50–6.75 3.50–4.50 — — — — 0.1
Ti-6Al-6V-2Sn 0.04 0.1 0.015 0.35–1.0 0.30 5.0–6.0 5.0–6.0 1.5–2.5 0.35–1.0 — — 0.1
A
For the purpose of determi
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