ASTM B817-03
(Specification)Standard Specification for Powder Metallurgy (P/M) Titanium Alloy Structural Components
Standard Specification for Powder Metallurgy (P/M) Titanium Alloy Structural Components
ABSTRACT
This specification deals with powder metallurgy structural components fabricated from commercially pure titanium powder mixed with master alloy powder and elemental powders to yield combined material chemistries comparable to ingot metallurgy alloys Titanium 6A1-4V and Titanium 6A1-6V2Sn. The following are the materials covered: Type I and II, Grade 1 and 2, and Class A and B. The chemical composition shall conform to the required values of aluminum, vanadium, tin, iron, copper, oxygen, hydrogen, nitrogen, carbon, sodium, chlorine, silicon, and titanium. Chemical analysis shall be made. Physical properties such as density shall be determined. Mechanical properties shall conform to the required tension properties: tensile strength, yield strength, elongation and reduction of area.
SCOPE
1.1 This specification covers powder metallurgy (P/M) structural components fabricated from commercially pure (CP) titanium powder mixed with master alloy powder and elemental powders in appropriate quantity to yield combined material chemistries comparable to ingot metallurgy (I/M) alloys Titanium 6A1-4V and Titanium 6A1-6V-2Sn.
1.2 This specification covers the following materials:
1.2.1 Two types depending on alloy composition as detailed in Table 1.
1.2.1.1 Type I is comparable to I/M Ti-6A1-4V.
1.2.1.2 Type II is comparable to I/M Ti-6A1-6V-2Sn.
1.2.2 Two grades of each type that result from the specific titanium powder used are as follows:
1.2.2.1 Grade 1 is made from sponge fines with residual levels of chlorine and sodium.
1.2.2.2 Grade 2 is made from hydride/dehydride (HDH) or other process titanium with significantly lower chlorine and sodium content.
1.2.3 Two classes as a function of density (see Table 2) are as follows:
1.2.3.1 Class A density ratio is 94 % minimum.
1.2.3.2 Class B density ratio is 99 % minimum. (Warning—CP titanium powder may be pyrophoric; its use may involve an explosion hazard.)
1.3 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.
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. Specific precautionary statements are given in 1.2.3.2.
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Designation: B 817 – 03
Standard Specification for
Powder Metallurgy (P/M) Titanium Alloy Structural
1
Components
This standard is issued under the fixed designation B 817; 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.
TABLE 1 Chemical Composition Requirements
1. Scope
Element Composition, Weight %
1.1 This specification covers powder metallurgy (P/M)
Grade 1 Grade 2
structural components fabricated from commercially pure (CP)
titanium powder mixed with master alloy powder and elemen-
Type I Type II Type I Type II
tal powders in appropriate quantity to yield combined material
Aluminum 5.50/6.75 5.0/6.0 5.50/6.75 5.0/6.0
Vanadium 3.50/4.50 5.0/6.0 3.50/4.50 5.0/6.0
chemistries comparable to ingot metallurgy (I/M) alloys Tita-
A A
Tin N/A 1.5/2.5 N/A 1.5/2.5
nium 6A1-4V and Titanium 6A1-6V-2Sn.
Iron 0.40 max 0.35/1.0 0.40 max 0.35/1.0
A A
1.2 This specification covers the following materials:
Copper N/A 0.35/1.0 N/A 0.35/1.0
Oxygen, max 0.30 0.30 0.30 0.30
1.2.1 Two types depending on alloy composition as detailed
Hydrogen, max 0.015 0.015 0.015 0.015
in Table 1.
Nitrogen, max 0.04 0.04 0.04 0.04
1.2.1.1 Type I is comparable to I/M Ti-6A1-4V.
Carbon, max 0.10 0.10 0.10 0.10
B B
Sodium, max 0.20 0.20 TBD TBD
1.2.1.2 Type II is comparable to I/M Ti-6A1-6V-2Sn.
B B
Chlorine, max 0.20 0.20 TBD TBD
1.2.2 Two grades of each type that result from the specific
Silicon, max 0.10 0.10 0.10 0.10
titanium powder used are as follows:
Residual elements 0.10 0.10 0.10 0.10
each, max
1.2.2.1 Grade 1 is made from sponge fines with residual
Residual elements 0.40 0.40 0.40 0.40
levels of chlorine and sodium.
total, max
1.2.2.2 Grade 2 is made from hydride/dehydride (HDH) or Titanium remainder remainder remainder remainder
A
other process titanium with significantly lower chlorine and
Not applicable.
B
Various chloride levels may be available between the standard 0.20 max and
sodium content.
the wrought equivalent of 0.001 max. The acceptable level for specific product
1.2.3 Two classes as a function of density (see Table 2) are
applications shall be agreed upon between the purchaser and supplier and
as follows:
specified on the purchase order.
1.2.3.1 Class A density ratio is 94 % minimum.
1.2.3.2 Class B density ratio is 99 % minimum.
(Warning—CP titanium powder may be pyrophoric; its use
2. Referenced Documents
may involve an explosion hazard.)
2.1 ASTM Standards:
1.3 The values stated in inch-pound units are to be regarded 2
B 243 Terminology of Powder Metallurgy
as the standard. The SI units given in parentheses are for
B 311 Test Method for Density Determination for Powder
information only.
Metallurgy (P/M) Materials Containing Less Than Two
1.4 This standard does not purport to address all of the
2
Percent Porosity
safety concerns, if any, associated with its use. It is the
B 328 Test Methods for Density, Oil Content, and Intercon-
responsibility of the user of this standard to establish appro-
nected Porosity of Sintered Powder Metal Structural Parts
priate safety and health practices and determine the applica- 2
and Oil-Impregnated Bearings
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in 1.2.3.2. 3. Terminology
3.1 Definitions—Definitions of powder metallurgy terms
1 can be found in Terminology B 243.
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.
Current edition approved June 10, 2003. Published July 2003. Originally
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approved in 1991. Last previous edition approved in 1998 as B 817 – 98. Annual Book of ASTM Standards, Vol 02.05.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B 817–03
TABLE 2 Density Requirements
purchaser. All shipments of components subsequent to the
Class Density Ratio min, % establishment of testing conditions shall conform to the agreed
limits.
A94
B99
9. Dimensions and Tolerances
9.1 Dimensions and tolerances of the structural components
shall be indicated on drawings accompanying the purchase
3.2 Descriptions of Terms Specific to This Standard—
order or contract.
Additional descriptive information is available in the Related
Material section of Volume 02.05 of the Annual Book of ASTM
10. Sampling
Standards.
10.1 Lot—Unless otherwise specified, a lot shall consist of
components fabricated from powder of the same mix lot;
4. Ordering Information
compacted,
...
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