Protection 400 Armor Steel Plate

Protection 400 is Masteel UK Limited’s designation for armor steel plate suitable for high protection against the pressures caused by blasts and explosions.
The material benefits from a combination of improved hardness and strength resulting in excellent ballistic properties and is developed exclusively for resistance to high explosives and ordnance. The steel goes through a direct quenching process which not only makes the steel very hard and very strong but also promotes excellent dimensional accuracy and good flatness. Note that the number 400 in the designation denotes the average Brinell Hardness value for this material.

Applications :
  • Military Vehicles & associative equipment
  • Security vehicles and cars
  • Walls, doors and window frames
  • Bank Counters and Bank Vaults

Mechanical Properties of Protection 400

GradeYield Strength MPaTensile Strength MPaElongation AHardnessImpact Strength (longitudinal) 
Rp0, 2 MPaRm MPaA5 %HBt Deg CCharpy V J
Protection 4001000125010360 - 420-4030

Chemical Composition of Protection 400
 %
C0.20
Si0.70
Mn1.70
P0.030
S0.015
Cr1.50
Ni0.40
Mo0.50
B0.004