MIL-DTL-24403/1F(SH)
b.
A conformance retest shall consist of repeating the test that failed two times (i.e., two-for-one). Note that a
mechanical property test such as tensile or impact toughness involves a set of test specimens and therefore
two full sets of specimens for each test that failed are required under this two-for-one rule.
c.
Results of all retests and reasons for all retests shall be reported on the certificate of conformance.
d.
Retests of weld metal shall be from the same weld used for the original test, if feasible. If replacement test
welds are needed, they shall be fabricated using consumables from the original sampling, if feasible. If
sufficient material is not available from the original sampling or storage of an opened package is expected
to influence results, another sample may be taken from the same lot and/or production run.
e.
Retests of product shall be from the same sampling as the original test, if feasible. If sufficient material is
not available from the original sampling or storage of an opened package is expected to influence results,
another sample may be taken from the same lot and/or production run.
f.
Unless the welding procedure was determined to be the root cause of the original test failure, any
replacement test weld should employ the same welding procedure as the original test weld. If a new
welding procedure is used to correct the root cause of the original test failure, the retest shall include all
tests conducted for the original weld. Two-for-one is only required for the test that failed. All future lots
of the material shall use the new welding procedure. The reason for changing procedure shall be justified
to the customer and included on the certification.
g.
If the results of any conformance retest do not satisfy the applicable requirements, then the lot shall be
rejected.
4.6.2 Check mechanical testing tolerances. Unless otherwise specified (see 6.2), retest as part of receipt
inspection by a shipyard or other user of a product supplied in conformance with this specification will use the
following mechanical property tolerances to verify acceptability of the product. If these mechanical property
tolerances will not be used to verify acceptability of the product in retest as part of receipt inspection, this shall be
specified in the order as indicated in section 6.2.
a.
Yield strength test results (rounded off to nearest 1000 psi) may be 3 percent higher than the specified
maximum or 3 percent lower than the specified minimum requirements of Table II.
Ultimate tensile strength test results (when required) may be lower than the specified requirement of Table
b.
II by 3 percent (rounded off to nearest 1000 psi).
Elongation test results shall not be lower than 93 percent of the minimum requirement specified in Table II.
c.
Charpy V-notch test results (both the average and the individual minimum value) may be lower than the
d.
requirements specified in Table II by 10 percent.
4.7 Inspection of packaging. Sample packages and packs, and the inspection of the preservation-packing,
packing and marking for shipment and storage shall be in accordance with the requirements of section 5 and
MIL-E-24403.
4.8 Certification of compliance. Unless otherwise specified (see 6.2), a certificate of conformance shall be
prepared for each lot of material offered for acceptance in accordance with the lot definition as specified in 4.3.1.
The certificate shall include all actual data of all the chemical and mechanical tests as required by MIL-E-24403 and
herein, including all test results that failed to meet those specified requirements and reasons for retest, and a record
of any stress relief treatment (if applicable). Operational parameters for any welded test assemblies shall also be
reported. The manufacturer, customer, MIL-type, heat or lot, size and form shall be identified. Qualitative results
of nondestructive tests, and other inspections or tests shall be recorded on the certificate. The certificate shall state
that each lot has been sampled, tested, and inspected in accordance with the specification requirements to produce
an electrode that meets the requirements within the tolerances allowed throughout the product. The certificate shall
state that each lot meets all specification requirements, and shall bear the signature of the responsible company
official. Where test certificates issued by the manufacturer contain the above data requirements, a separate
certificate of conformance will not be required. A certificate of conformance or equivalent test certificate shall be
furnished to the consignee with the shipment.
5. PACKAGING
5.1 Packaging. Packaging shall be as specified in MIL-E-24403.
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