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SCF 19® Max

UNS #S21000

SCF 19® Max is an austenitic, nitrogen-strengthened stainless steel containing 5% Mo for improved stress-corrosion-cracking resistance. The alloy can be warm worked to achieve a minimum yield strength of 140 ksi. Because of its combination of stress-corrosion-cracking resistance, chloride pitting resistance, high strength, and low magnetic permeability it has been used as a nonmagnetic drill collar and MWD/LWD housing alloy in some of the harshest drilling environments.

Type Analysis

  • Carbon (Maximum) 0.04
  • Phosphorus (Maximum) 0.03
  • Silicon (Maximum) 0.6
  • Nickel (Nominal) 16.00-20.00
  • Manganese (Maximum) 4.00-7.00
  • Sulfur (Maximum) 0.003
  • Chromium (Nominal) 18.00-23.00
  • Molybdenum (Maximum) 4.00-6.00
  • Nitrogen (Maximum) 0.35

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