This specification covers the welding materials described in 6.1.1.1 through 6.1.1.11 which, when deposited on the applicable base metals specified in 4.4, will meet the mechanical properties specified herein for the different welding processes and conditions.

Type MIL-70S-1 electrode is primarily used for multiple pass welding killed steel.

Type MIL-70S-2 electrode contains aluminum, zirconium, and titanium in addition to the silicon and manganese content. This electrode is particularly adapted to producing sound welds in semi-killed and rimmed steels as well as killed steels.

Type MIL-70S-3 electrode has a higher silicon content than type MIL-70S-1. This electrode can be used to make multiple pass welds in semi-killed and killed steels.

Type MIL-70S-4 electrode has a higher silicon content than type MIL-70S-3. This electrode is used where welding application requires a higher arc voltage or conditions require more deoxidization than type MIL-70S-3,

Type MIL-70S-5 electrode contains manganese, silicon, and aluminum. This electrode should be used only for structural work when exceptional deoxidization of weld metal is required.

Type MIL-70S-6 electrode contains a high manganese and silicon content and produces welds with high impact properties.

Type MIL-70S-7 electrode contains a high manganese mild steel composition which is capable of attaining table V properties when deposited by the SAW process.

Type MIL-70S-8 electrode is an intermediate manganese-molybdenum composition which is used in SAW welding of mild steel.

Type MIL-70S-9 electrode is a high manganese-molybdenum composition for SAW welding which retains the highest mechanical properties after stress relief.

Restricted copper electrodes and rods will used when specified in 6.2 (see table I).

Type MIL-70S-F is a neutral granular flux intended for submerged arc welding with the type MIL-70S series electrodes.