MIL-DTL-22200-1 Electrodes, Welding, Mineral Covered, Iron-Powder, Low-Hydrogen Medium And High Tensile Steel, As-Welded Or Stress-Relieved Weld ApplicationThis specification covers iron-powder, low-hydrogen types of mineral covered electrodes, for the fabrication and repair welding of low and medium carbon and high tensile steels for as-welded and stress-relieved application.

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MIL-DTL-22200/1H(SH)

4.5.4 Certification of conformance. 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 4.5.1.

The certificate shall include all actual data of all the chemical and mechanical tests as required by MIL-E-22200 and

herein, including all test results that failed to meet those specified requirements, 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, wet-mix equivalency test (if applicable), 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 be

signed by a responsible representative of the manufacturer. 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.

4.6 Test procedures.

4.6.1 Diffusible hydrogen. For MIL-7018-M and MIL-11018-M electrodes, a sample of every lot of each size

and MIL-type of electrodes furnished to the requirements of this specification shall be tested for diffusible hydrogen

level in the weld metal. The test results shall be recorded along with the corresponding covering moisture. The

hydrogen level of the deposited weld metal shall be determined by the analytical method of gas chromatograph or by

the method of collection over mercury as specified in AWS A4.3. The test data shall be reported as specified in

AWS A4.3.

4.6.2 Weld tests. Tables VI and VII summarize the weld tests required under this specification for qualification

testing of electrodes and for the conformance inspection as specified in table IX. Ordinary-strength hull structural

steel or higher-strength hull structural steel base material as specified in MIL-S-22698 and ASTM A36/A36M plate

may be used for all electrode tests, except for MIL-11018-M electrodes. For MIL-11018-M type electrodes, the

base plate material shall be HY-80 steel as specified in NAVSEA Technical Publication T9074-BD-GIB-010/0300.

The plate shall meet the chemical composition requirements of NAVSEA Technical Publication T9074-BD-GIB-

010/0300, and can be in the as-rolled condition without being quenched and tempered or tested for mechanical

properties. For MIL-7018-M, when specified (see 6.2), the base plate material shall be HSLA-80 or HSLA-100

steel as specified in NAVSEA Technical Publication T9074-BD-GIB-010/0300, and the preheat and interpass

temperature shall be 60 �F minimum.

4.6.2.1 MIL-11018-M weld tests. For Type MIL-11018-M electrodes, the weld tests shall be as specified in

table VI, footnote 3 and table XIII.

4.6.2.2 Calculation of welding heat input. Heat input (J/in) shall be calculated using the following formula:

Volts x Amperes x 60

Heat Input (J/in) =

Travel Speed (inches per minute)

4.6.2.2.1 Operational heat input calculation. Operational heat input shall be the actual heat input recorded or

calculated for individual passes during welding of the test assemblies. For shielded metal arc welding, calculate the

operational heat input of each pass in the test assembly using the following procedure:

a. To determine the travel speed for each complete weld pass, divide the total length of the complete weld

pass by the total arc time for the pass. Total length of the complete weld pass and total arc time for the pass shall be

calculated as in b and c below, respectively.

b. On MIL-11018-M to determine the total length of the complete weld pass, measure each weld bead

individually and add the bead lengths. Measure each bead from the apparent trailing edge of the beginning of the

bead to the apparent trailing edge of the stop crater. On other electrode types the total completed weld pass may be

measured to determine length, or alternately, the method described for MIL-11018-M may be used. Do not use the

length of the test assembly as the pass length.