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Master Bond adhesives
ATI Allegheny Ludlum K12® Dual Hardness Steel
Categories: Metal; Ferrous Metal; Carbon Steel

Material Notes: This is a roll bonded, dual hardness armor plate consisting of a high hardness front side to break up or flatten incoming projectiles while the back side functions to capture the projectile.

The composition of both faces is a Ni-Mo-Cr steel, but the front side has a higher carbon content, which leads to a higher hardness after heat treatment. The front and back sides are roll bonded by a multi-step, proprietary process which involves heating the assembly to a specific temperature and hot rolling it until the two sides develop a strong, metallurgical bond. The roll-bonded plates are annealed, sheared, and flattened. A careful and precise heat treatment is required to achieve optimum ballistics performance.

Information provided by Allegheny Ludlum.

Vendors:
Available Properties
  • Density
  • Hardness, Brinell, Annealed; Soft Side
  • Hardness, Brinell, Annealed; Hard Side
  • Hardness, Rockwell C, Heat Treated; Soft Side
  • Hardness, Rockwell C, Heat Treated; Hard Side
  • Tensile Strength, Ultimate, Average Annealed
  • Tensile Strength, Yield
  • Elongation at Break, Average Annealed
  • Compressive Yield Strength, 0.2%; Average Transverse Hardened
  • Compressive Yield Strength, 0.2%; Average Longitudinal Hardened
  • Charpy Impact, 0.009" V-Notch in soft side; struck on hard side; Heat Treated
  • Charpy Impact, Unnotched, Heat Treated
  • Electrical Resistivity
  • Electrical Resistivity
  • CTE, linear
  • Specific Heat Capacity
  
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Manufacturer Notes:
ATI Allegheny Ludlum, Allegheny Technologies Incorporated

Category Notes
none

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