After forging or machining:

  1. Heat to 1,450-1,500°F.
  2. Quench.
  3. Reheat to 500-1.250°F. and cool slowly.

Heat Treatment P

After forging or machining:

  1. Heat to 1,450-1,500°F.
  2. Quench.
  3. Reheat to 1,375-1,450°F. slowly.
  4. Quench.
  5. Reheat to 500-1,250°F. and cool slowly.

Heat Treatment Q

After forging:

  1. Heat to 1,475-1,525°F. (Hold at this temperature one-half hour, to insure thorough heating.)
  2. Cool slowly.
  3. Machine.
  4. Reheat to 1,375-1,425°F.
  5. Quench.
  6. Reheat to 250-550°F. and cool slowly.

Heat Treatment R

After forging: