STORAGE COMPATIBILITY GROUPS
Different types of ammunition and explosives may be mixed in storage only if they are compatible. The
factors that were considered in the development of the SCGs included, but were not limited to, the
Chemical and physical properties.
Inner and outer packing configurations.
QD class and division.
Net explosive weight (NEW).
Sensitivity to initiation.
The effects of deflagration, explosion, or detonation.
Items that have been determined to be compatible may be stored together without significantly
increasing the hazards associated with the separate storage of the items.
The SCGs in this lesson pertain to ammunition stored at Army activities. Do not confuse them with the
field storage categories that are covered in another subcourse.
Ammunition and explosives are assigned to one of twelve SCGs based on approved storage principles,
taking mixed storage factors into consideration. The paragraphs that follow describe these twelve
SCG A: Bulk Initiating Explosives
Items in this group are sensitive to heat, friction, and percussion. They are used to initiate elements in
an explosive train. Examples of SCG A items are wet lead azide, lead styphnate, wet mercury
fulminate, and dry PETN.
SCG B: Detonators and Initiating Devices
Items in this group are used to initiate or continue the functioning of an explosive train. Examples of
SCG B items are blasting caps, detonators, small arms primers, and fuzes without two or more safety
features. Examples of SCG B items are shown in Figure 2-1.
Note that initiating explosives are used with initiating devices; that is, blasting caps may contain PETN,
fuzes may contain mercury fulminate or lead styphnate, and so on.
If you are interested in obtaining more information about the explosives in SCG A and SCG B, obtain a
copy of TM 9-1300-214, Military Explosives, dated 20 September 1984, from your unit training NCO or
your local learning center.
This SCG includes bulk propellants, propelling charges, and devices containing propellants with or
without their own means of initiation. Examples of SCG C items are propelling charges, rocket motors
containing propellants, and ammunition with inert projectiles. Examples are shown in Figure 2-2.