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)

TABLE II. Water content.

Maximum water content (percent by weight) 1/

Type

Condition B 3/

Condition A 2/

MIL-7018-M

0.10

0.20

MIL-8018-C3

0.10

0.20

MIL-8018-C3SR

0.10

0.20

MIL-9018-M

0.10

0.20

MIL-11018-M

0.10

0.20

NOTES:

If the infrared detection method identified in AWS A4.4M is used for

determining moisture content, Condition A tests shall display a maximum water

content of 0.15 percent and Condition B tests shall display a maximum water

content of 0.2 percent. For test methods other than infrared detection, the limits

as specified in table II apply.

Condition A - When removed from sealed manufacturer's container.

Condition B - After 9 hours �0, +30 minutes of exposure at 80 percent relative

humidity (RH) and 80 �F as specified in 4.8.

For receipt inspection by the contracting activity, the maximum water content

shall not be greater than 0.25 percent for all methods except the infrared method

which shall not be greater than 0.29 percent.

3.3.2 Total iron content. The total iron content of the covering, including any combined iron in addition to

metallic iron powder, shall be not less than 15 percent.

3.4 Groove welds.

3.4.1 Mechanical properties. The weld metal properties for the tensile and impact tests required for

qualification inspection, conformance inspection or the acquisition document shall be as specified in table III. When

specified (see 6.2), the welded test assembly shall be stress-relieved as stated in 4.4 and as follows:

a. MIL-7018-M, MIL-8018-C3, and MIL-8018-C3SR. For MIL-7018-M, the welded test assembly shall be

heated to 1150�25 �F, held at this temperature for one hour and furnace cooled at 200 �F per hour or slower to

below 500 �F. For MIL-8018-C3 and MIL-8018-C3SR, the welded test assembly shall be heated to 1150�25 �F,

held at this temperature for two hours and furnace cooled at 200 �F per hour or slower to below 500 �F.

b. MIL-8018-C3SR. The welded test assembly shall be heated to 1150+25 �F, held at this temperature for 50

hours minimum and furnace cooled at 10 �F per hour or slower to below 600 �F.

c. MIL-9018-M and MIL-11018-M. The welded test assembly shall be heated to 1025�25 �F, held at this

temperature for one hour and furnace cooled at 200 �F per hour or slower to below 500 �F.