|
Steel |
Stainless |
Material |
AISI 1022 or equivalent steel |
410 stainless steel |
Heat Treatment |
Screws shall be quenched in liquid and
then tempered by reheating to 625°F
minimum. |
410 stainless steel screws shall be hardened
and tempered by heating to 1800°-1900°F
sufficient for austenitization, held for at
least 1/2 hour and rapid air or oil-quenched
then reheating to 500°-600°F for at least 1
hour and air cooled to provide the specified
hardness. |
Case Hardness |
Rockwell C52 - 58 |
410 SS: Rockwell C55 minimum |
Case Depth |
No. 10 & 12 diameter: .004 - .009
1/4 diameter & larger: .005 - .011 |
- |
Core Hardness |
Rockwell C21 - 43 (after tempering) |
Rockwell C38 - 42 (after tempering) |
Shear Strength |
The average ultimate values for shear
strength are listed in the above table.
Safety factors should be used when
designing final applications. |
- |
Pullout Strength |
The average ultimate values for pullout
strength are listed in the above table.
Safety factors should be used when
designing final applications. |
- |