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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

Manganese
Manganese adds considerably to the tensile strength of steel,...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

Corrosion
This steel like any other steel when distorted by cold worki...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

The Electric Process
The fourth method of manufacturing steel is by the electric f...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...



S A E Heat Treatments






Category: HEAT TREATMENT OF STEEL

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 deg.F. and 1,750 deg.F.
(1,650-1,700 deg.F. desired.)
2. Cool slowly or quench.
3. Reheat to 1,450-1,500 deg.F. and quench.

Heat Treatment B

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

Heat Treatment D

After forging or machining:
1. Heat to 1,500-1,600 deg.F.
2. Quench.
3. Reheat to 1,450-1,500 deg.F.
4. Quench.
5. Reheat to 600-1,200 deg.F. and cool slowly.

Heat Treatment E

After forging or machining:
1. Heat to 1,500-1,550 deg.F.
2. Cool slowly.
3. Reheat to 1,450-1,500 deg.F.
4. Quench.
5. Reheat to 600-1,200 deg.F. and cool slowly.

Heat Treatment F

After shaping or coiling:
1. Heat to 1,425-1,475 deg.F.
2. Quench in oil.
3. Reheat to 400-900 deg.F., in accordance with temper desired and cool
slowly.

Heat Treatment G

After forging or machining:
1. Carbonize at a temperature between 1,600 deg.F. and 1,750 deg.F.
(1,650-1,700 deg.F. desired).
2. Cool slowly in the carbonizing mixture.
3. Reheat to 1,500-1,550 deg.F.
4. Quench.
5. Reheat to 1,300-1,400 deg.F.
6. Quench.
7. Reheat to 250-500 deg.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 deg.F.
2. Quench.
3. Reheat to 600-1,200 deg.F. and cool slowly.

Heat Treatment K

After forging or machining:
1. Heat to 1,500-1,550 deg.F.
2. Quench.
3. Reheat to 1,300-1,400 deg.F.
4. Quench.
5. Reheat to 600-1,200 deg.F. and cool slowly.

Heat Treatment L

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

Heat Treatment M

After forging or machining:
1. Heat to 1,450-1,500 deg.F.
2. Quench.
3. Reheat to 500-1.250 deg.F. and cool slowly.

Heat Treatment P

After forging or machining:
1. Heat to 1,450-1,500 deg.F.
2. Quench.
3. Reheat to 1,375-1,450 deg.F. slowly.
4. Quench.
5. Reheat to 500-1,250 deg.F. and cool slowly.

Heat Treatment Q

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

Heat Treatment R

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

Heat Treatment S

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

Heat Treatment T

After forging or machining:
1. Heat to 1,650-1,750 deg.F.
2. Quench.
3. Reheat to 500-1,300 deg.F. and cool slowly.

Heat Treatment U

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

Heat Treatment V

After forging or machining:
1. Heat to 1,650-1,750 deg.F.
2. Quench.
3. Reheat to 400-1,200 deg.F. and cool slowly.





Next: Restoring Overheated Steel

Previous: Drop Forging Dies



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