15-15LC® Modified

15-15LC® Modified is an austenitic, nitrogen-strengthened stainless steel with a low carbon content that provides improved resistance to intergranular stress-corrosion cracking. High nitrogen content and warm working on rotary forge below the recrystallization temperature results in high yield strength.

Type Analysis

  • Carbon (Maximum) 0.04
  • Phosphorus (Maximum) 0.05
  • Silicon (Maximum) 1
  • Nickel (Nominal) 3
  • Manganese (Maximum) 15.00-19.00
  • Sulfur (Maximum) 0.05
  • Chromium (Nominal) 16.00-21.00
  • Molybdenum (Nominal) 0.50-3.00
  • Iron (Nominal) Balance
  • Nitrogen (Nominal) 0.20-0.80


Nonmagnetic drill collars, stabilizers, and MWD housings

Applicable Specifications


Hollow Bar

Multidimensional Bar



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