TSH & LH Steel Technology

TSH & LH STEEL TECHNOLOGY:

• Novel steel technology was developed
  • Low hardenability
    • DI <16mm for LH steels
  • Extremely low probability of austenite grain growth
    • Very Fine Grain Size (GS 9-12)
• Improved forgeability
• Acceptable machinability
• Lower propensity for distortion and cracking during quenching
• 3rd generation LH steels are now available
  • Improved hardenability control (+/- 1 mm)
  • Lower minimum hardenability (DI=6 mm)
  • Allows thinner cross sections to be heat treated
  • Finer grain size (GS 11-13)

61 LH TRIAL HEAT

• Trial Heat Cast at WSH in February 2014
• 84 tons of LH61 steel strand cast
• 2 Billet sizes
  • 5.125 Square for rolled flats
  • 6.25 Square for rounds
    • 25 billets available for rolling
• • Rolling was performed at KES
  • Rounds Sizes, 2.875”, 3” & 3.75”
  • Rolled flats in March 2014
  • Rolled Rounds in 2014 & 2015
    • 2.875” Bar available
    • 3.75” Bar available
• • LH Steel Quality – Significant Improvement