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Controlled core wire chemical composition |
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|  MIL-E-22200G
(c) In processes involving continuous melting and casting (for
example, consumable electrode remelt), a heat is an uninterrupted
series of remelts in one furnace under the same remelting
conditions using one or more consumable electrodes produced from
a heat, as defined in (a) or (b) above, each remelt conforming to
the chemical composition range approved by the purchaser of the
material (the producer of the filler q etal).
4.4.1.4 Identification of core wire.
4.4.1.4.1 Heat number. Electrode core wire identified by heat number shall
consist of material from a single heat of metal.
4.4.1.4.2 Controlled core wire chemical composition. Electrode core wire,
identified by controlled chemical composition, rather than by heat number, shall
consist of mill coils of one or more heats from which samples have been taken for
chemical analysis. The results of the analysis of each sample shall be within
the manufacturer's composition limits for that material. Coils from mills that
do not permit spliced-coil practice need be sampled on only one end. Coils from
mills that permit spliced-coil practice shall be sampled on both ends and shall
have not more than a single splice per coil. The following additional conditions
shall apply:
(a) All chemical analyses shall be certified by the laboratory and
made available to the Government representative.
(b) Mill coils of rod conforming to established core wire chemistry
control for a specific MIL-type electrode shall be appropriately
identified and segregated to avoid mixups.
4.4.2 Inspection level A.
4.4.2.1 Lot.
For the purpose of selecting samples for quality conformance
inspection, a lot of electrodes is defined as the quantity of any one size and
type produced from one wet mix of covering mixture as specified in 4.4.1.1.3 and
one heat of core wire as defined in 4.4.1.3 or 4.4.1.4.2.
4.4.3
Inspection level B.
4.4.3.1 Lot.
For the purpose of selecting samples for quality conformance
inspection, a lot of electrodes is the quantity, not exceeding 100,000 pounds of
any one size and classification produced in one continuous 24-hour period (or
three consecutive normal work shifts) from covering identified by wet mix (see
4.4.1.2.1) or controlled chemical composition (see 4.4.1.2.2) and core wire
identified by heat number (see 4.4.1.4.1) or controlled chemical composition (see
4.4.1.4.2).
4,4.4 Inspection level C.
4.4.4.1 Lot.
For the purpose of selecting samples for quality conformance
inspection, a lot of electrodes is defined as the quantity of any one size and
type produced from one or more wet mixes of covering mixture in conjunction with
core wire as defined in either 4.4.1.3 or 4.4.1.4.2 during a 24-hour continuous
period (or three consecutive normal work shifts).
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