S. A. E. HEAT TREATMENTS

The Society of Automotive Engineers have adopted certain heat treatments to suit different steels and varying conditions. These have already been referred to on pages 39 to 41 in connection with the different steels used in automobile practice. These treatments are designated by letter and correspond with the designations in the table.

HEAT TREATMENTS

Heat Treatment A

After forging or machining:

  1. Carbonize at a temperature between 1,600°F. and 1,750°F. (1,650-1,700°F. desired.)
  2. Cool slowly or quench.
  3. Reheat to 1,450-1,500°F. and quench.

Heat Treatment B

After forging or machining:

  1. Carbonize between 1,600°F. and 1,750°F. (1,650-1,700°F. Desired.)
  2. Cool slowly in the carbonizing mixture.
  3. Reheat to 1,550-1,625°F.
  4. Quench.
  5. Reheat to 1,400-1,450°F.
  6. Quench.
  7. Draw in hot oil at 300 to 450°F., depending upon the degree of hardness desired.

Heat Treatment D

After forging or machining:

  1. Heat to 1,500-1,600°F.
  2. Quench.
  3. Reheat to 1,450-1,500°F.
  4. Quench.
  5. Reheat to 600-1,200°F. and cool slowly.

Heat Treatment E

After forging or machining:

  1. Heat to 1,500-1,550°F.
  2. Cool slowly.
  3. Reheat to 1,450-1,500°F.
  4. Quench.
  5. Reheat to 600-1,200°F. and cool slowly.

Heat Treatment F

After shaping or coiling:

  1. Heat to 1,425-1,475°F.
  2. Quench in oil.
  3. Reheat to 400-900°F., in accordance with temper desired and cool slowly.

Heat Treatment G

After forging or machining:

  1. Carbonize at a temperature between 1,600°F. and 1,750°F. (1,650-1,700°F. desired).
  2. Cool slowly in the carbonizing mixture.
  3. Reheat to 1,500-1,550°F.
  4. Quench.
  5. Reheat to 1,300-1,400°F.
  6. Quench.
  7. Reheat to 250-500°F. (in accordance with the necessities of the case) and cool slowly.

Heat Treatment H

After forging or machining:

  1. Heat to 1,500-1,600°F.
  2. Quench.
  3. Reheat to 600-1,200°F. and cool slowly.

Heat Treatment K

After forging or machining:

  1. Heat to 1,500-1,550°F.
  2. Quench.
  3. Reheat to 1,300-1,400°F.
  4. Quench.
  5. Reheat to 600-1,200°F. and cool slowly.

Heat Treatment L

After forging or machining:

  1. Carbonize between 1,600°F. and 1,750°F. (1,650-1,700°F. desired).
  2. Cool slowly in the carbonizing mixture.
  3. Reheat to 1,400-1,500°F.
  4. Quench.
  5. Reheat to 1,300-1,400°F.
  6. Quench.
  7. Reheat to 250-500°F. and cool slowly.

Heat Treatment M

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:

  1. Heat to 1,500-1,550°F.
  2. Quench in oil.
  3. Reheat to 1,200-1,300°F. (Hold at this temperature three hours.)
  4. Cool slowly.
  5. Machine.
  6. Reheat to 1,350-1,450°F.
  7. Quench in oil.
  8. Reheat to 250-500°F. and cool slowly.

Heat Treatment S

After forging or machining:

  1. Carbonize at a temperature between 1,600 and 1,750°F. (1,650-1,700°F. Desired.)
  2. Cool slowly in the carbonizing mixture.
  3. Reheat to 1,650-1,750°F.
  4. Quench.
  5. Reheat to 1,475-1,550°F.
  6. Quench.
  7. Reheat to 250-550°F. and cool slowly.

Heat Treatment T

After forging or machining:

  1. Heat to 1,650-1,750°F.
  2. Quench.
  3. Reheat to 500-1,300°F. and cool slowly.

Heat Treatment U

After forging:

  1. Heat to 1,525-1,600°F. (Hold for about one-half hour.)
  2. Cool slowly.
  3. Machine.
  4. Reheat to 1,650-1,700°F.
  5. Quench.
  6. Reheat to 350-550°F. and cool slowly.

Heat Treatment V

After forging or machining:

  1. Heat to 1,650-1,750°F.
  2. Quench.
  3. Reheat to 400-1,200°F. and cool slowly.