140 ksi

140 KSI Ultra-High Strength Structural-Quality Steel Plate

140 ksi min-yield steel plates are premium ultra-high strength, structural quality, heat-treated plates.


  • Ultra-high strength structural-quality steel plate that offers high yield and tensile strengths combined with excellent weldability and formability.
  • Minimum yield strength of 140 ksi (960 MPa).
  • Quenched and tempered for increased strength.
  • Common applications include the manufacture of heavy equipment such as semi trailers, crane booms, truck frames, logging and construction equipment.
  • Composition and heat treatment processes differ between mills, but yield strength is guaranteed to be at least 140 ksi.
  • Mill test reports are supplied with each order.


Available Sizes

Leeco® Steel stocks the following standard sizes, but other sizes may be available for special orders.

140 ksi / 960 MPa 3/16" – 1/2" 48" – 96" Up to 480"