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"

Minimum order weight in the USA is 20 tons. For orders weighing less than 20 tons, additional freight surcharges may be applied. Minimum order weight for orders outside of North America is 500 MT.