MIL-DTL-60547G (AR)
3.3 Ammunition lot numbering. Ammunition lot numbers shall
be assigned in accordance with MIL-STD-1168.
3.4 Mechanical properties. Heat treatment or stress relief
applied shall be uniform throughout each lot of projectiles and
shall be so performed and controlled as to produce in the
projectile the mechanical properties specified in drawing
10535878 for the M1, or drawing 12551740 for the M760.
3.4.1 Rotating band mechanical properties. After application and
subsequent removal, the rotating band shall have the following
mechanical properties:
a. Tensile strength - 30,000 lbs per square inch (PSI)
minimum
b. Elongation 15 percent in one inch of gage length,
minimum
3.5 Projectile material defects.
3.5.1 Projectile cavity. The projectile cavity shall be free
from scale, fins, burrs, draw marks, laminations, imbedded
foreign matter, pits, and sharp edges (see 6.5).
3.5.2 Projectile. The projectile, including the cavity,
shall be free from cracks, splits, bursts, cold shuts, pipe,
porosity, inclusions, folds, seams, and other metal defects (see
6.5).
3.6 Rotating band.
3.6.1 Foreign matter on band seat. Prior to banding, the
band seat shall be free from oil, grease, dirt, rust or other
foreign matter. Shot or sandblasting shall not be permitted for
cleaning the band seat.
3.6.2 Band blank. The rotating band blank shall be in the
form of a solid ring, annealed if necessary to comply with the
requirements of drawing 8594851.
3.6.3 Application. The rotating band shall be applied after
final heat treatment of the body, by carefully pressing the band
blank into the band seat so as to make contact with the sidewalls
for a minimum of eight-tenths of the band seat depth. There
shall be no gap between the rotating band and the sidewalls of
the band seat, after the rotating band has been machined to final
dimension. The band shall be applied in such a manner as not to
distort the body wall.
3.6.4 Band seating. The diametrical clearance between the
rotating band and band seat shall not exceed 0.006 inches, when
the destructive method of testing is used, or 0.009 inches when
the non-destructive method of testing is used.
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