MIL-DTL-46035C(MR)
ASTM E8
Tension Testing of Metallic Materials (DoD adopted)
ASTM E21
Elevated Temperature Tension Tests of Metallic Materials (DoD adopted)
ASTM E23
Notched Bar Impact Testing of Metallic Materials (DoD adopted)
ASTM E120 Chemical Analysis of Titanium and Titanium Alloys (DoD adopted)
(Application for copies should be addressed to the American Society for Testing and Materials, 100
Barr Harbor Drive, West Conshohocken, PA 19428-2959.)
2.3 Order of precedence. In the event of a conflict between the text of this document and the
references cited herein, the text of this document takes precedence. Nothing in this document,
however, supersedes applicable laws and regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Chemical composition. Unless otherwise specified in the contract, the chemical composition
of the titanium alloys shall comply with the range proposed by the supplier. The supplier shall submit a
certified analysis of each heat to the procuring activity. The statement of analysis shall include all
elements intentionally added as well as the percentage of oxygen, hydrogen, and nitrogen present as
impurities, and the percentage of iron and copper present. Three grades with respect to impurities may
be specified in the invitation for bids or contract as shown in table I.
TABLE I. Composition - percent, maximum.
Impurity
Grade
C
O2
N
H
Extra low
EL 1
0.10
0.10
0.02
0.0125
Low
L1
0.10
0.12
0.03
0.0125
Normal
N1
0.10
0.18
0.04
0.0125
3.2 Processing controls.
3.2.1 Welding. Components shall not be welded, except on prolongations. All welds shall be so
located that they will not affect the finished components or the test metal.
3.2.2 Straightening. The material shall not be straightened or worked after the final heat treatment
operation.
3.3 Heat treatment. Heat treatment, (solutionizing, cooling, stress-relieving, and aging) shall be
performed uniformly on the material being processed. Unless otherwise specified (see 6.2), the
quenching of tubular components shall be done vertically with the bore unobstructed, so as to permit
free passage of the coolant through the bore. Aging shall be performed at a temperature of not less than
500°F, and for a sufficient time to ensure uniform response throughout the section.
3.4 Mechanical properties.
3.4.1 Tensile properties.
3.4.1.1 Yield strength. The yield strength shall be as specified in the contract, or on the applicable
drawings.
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