600 (MIL-A-32332)

MIL-A-32332 Grade 600 is an ultra-high-hardness armor steel plate engineered for the most demanding ballistic protection requirements in modern defense and tactical applications. With a nominal hardness of 600 Brinell (BHN), this material delivers maximum resistance to armor-piercing threats and high-velocity impacts while maintaining sufficient toughness to prevent cracking or spalling. Produced to the U.S. Department of Defense MIL-DTL-32332 specification, 600 armor plate is fully quenched and tempered, ensuring a refined martensitic microstructure for consistent hardness and ballistic performance across the plate thickness.

600 is a medium-carbon quenched and tempered steel plate product meeting requirements of MIL-A-32332 (MR) for specialized ballistic armor applications.

Property

specification

Weldability

Carbon equivalent of 0.84 Typical

Mechanical Properties (ASTM A370)

Hardness
Yield Strength (Typical)
Tensile Strength (Typical)

570-627 BHN
220-250 Ksi
290-325 Ksi

55-59 Rockwell C
1517-1724 MPa
2000-2240 MPa

Charpy V-Notch Impact

Tested @ -40°F, 6 ft-lbs min., full size, transverse. Sub-size specimens used for sizes <1/2" thick will meet the MIL spec.

Ballistic Testing

To meet MIL-A-32332 test projectile .30 cal AP, M2, 30° obliquity; testing of production material will be done at an approved test facility.

Availability

600 is available in widths up from 40 to 60″ (1200 -1524mm) and in thicknesses from 0.187-0.500″ (4.75-12.7mm) with a length of up to 24 feet (7315 mm). Inquire for custom widths and lengths.