M1A1 Abrams MBT - Estimated Armor Protection Levels (2002)

M1A1HC, M1A1HA, M1A1D

Against Kinetic Energy
(in mm of RHAe)

Against Chemical Energy
(in mm of RHAe)

Turret

800 - 900

1,320 - 1,620

Glacis

560 - 590

510 - 1,050

Lower Front Hull

580 - 650

800 - 970

RHAe = Rolled Homogeneous Armor Equivalent; an equivalent RHA thickness of a given armor type against a given armor piercing ammunition or missile (i.e. Kinetic Energy penetrators, like APFSDS DU long-rod penetrators or Chemical Energy projectiles, like HEAT ammunition and ATGM's). Modern composite (Chobham) armor may be several times more efficient against Chemical Energy than RHA of the same thickness.