ASTM B299-99

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Designation: B 299 – 99
Standard Specification for
Titanium Sponge
This standard is issued under the fixed designation B 299; 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.
1. Scope shall conform to the chemical composition requirements pre-
scribed in Table 1.
1.1 This specification covers virgin titanium metal melting
stock. This virgin metal is commonly designated as sponge
5. Hardness
titanium because it is most commonly porous and spongelike in
5.1 The Brinell Hardness of a lot shall be the average of the
texture, although metal produced electrolytically is granular
hardness determinations on each button prepared as described
and is essentially nonporous.
in Section 5. The average hardness of each button for the lot
1.2 The values stated in inch-pound units are to be regarded
shall not exceed the values specified in Table 1. Measurement
as the standard. The values given in parentheses are for
shall be in accordance with Test Method E 10, using a 0.394 in.
information only.
(10-mm) ball, 3307-lbf (1500-kgf) load, and 30-s dwell.
2. Referenced Documents
6. Sampling
2.1 ASTM Standards:
6.1 The sampling method used shall be a matter of agree-
E 10 Test Method for Brinell Hardness of Metallic Materi-
2 ment between the manufacturer and the purchaser. The follow-
als
ing are acceptable industrial practices:
E 120 Test Methods for Chemical Analysis of Titanium and
3 6.1.1 The blend shall be sampled as required in 6.1.2 and
Titanium Alloys
6.1.3 unless otherwise agreed upon between the manufacturer
3. Materials and Manufacture and the purchaser.
6.1.2 The sample for determining the conformance of the lot
3.1 Sponge titanium is usually prepared by reduction of
to the chemical and physical requirements shall be obtained by
titanium tetrachloride and gets its spongelike character from
sampling the lot to produce a 0.25 % sample but not less than
the processes involved in production. This spongy character-
30 lb (14 kg) providing the lot is crushed to a particle size of
istic, however, is not considered essential and may be expected
1 in. (25.4 mm) or less in size. The blended evaluation sample
to vary greatly with manufacturing methods. For example,
shall be split to produce two or more samples 0.1 lb (45 g) or
virgin titanium produced electrolytically is crystalline or
more each, to be melted into buttons, and one sample of at least
granular in character and is essentially nonporous. The metal is
0.5 lb (227 g).
usually supplied in lump or granular form. This specification,
6.1.3 The buttons shall be melted in a furnace under an
however, is not limited to metal prepared by reduction of the
inert-gas atmosphere. The resulting 0.1-lb (45-g) buttons shall
tetrachloride.
be checked for Brinell hardness and samples shall be taken
3.2 Only virgin titanium, free of scrap and intentionally
from each button for the required chemical analysis. The 0.5-lb
added contaminants, shall be supplied under this specification.
(227-g) sample shall be used for the metal, chlorine, hydrogen,
It shall be supplied in uniform, well-mixed blends, each of
and moisture analysis.
which shall be clearly designated.
7. Retests
4. Chemical Composition
7.1 If the results of any test lot are not in conformance with
4.1 The titanium metal supplied under this specification
the requirements of this specification, the lot may be retested at
the option of the manufacturer. The frequency of the retest will
double the initial number of tests. If the results of the retest
This specification is under the jurisdiction of ASTM Committee B-10 on
conform to this specification, then the retest values will
Reactive and Refractory Metals and Alloysand is the direct responsibility of
Subcommittee B10.01on Titanium.
become the test values for certification. If the results of the
Current edition approved May 10, 1999. Published July 1999. Originally
retest fail to conform to this specification, the material will be
published as B 299 – 55 T. Last previous edition B 299 – 94.
2 rejected in accordance with Section 9. All test values, original
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 03.05. and retest, shall be reported to the purchaser.
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B 299
TABLE 1 Chemical Requirements
Weight by % (Dry Basis)
...