2/ When specified (see 6.2), for forged rings and discs, hardness measurements may be utilized in lieu of tensile tests.
3/ Applicable to both hot finished and cold drawn material. TABLE IV. Mechanical properties of sheet and strip.
QQ-N-286G
Form and condition |
Tensile strength lb/in2 (minimum) |
Yield strength at 0.2% offset (minimum) 1/ |
Elongation in 2 inches, percent (minimum) 1/ |
Rockwell hardness |
|
Sheet |
Cold rolled and annealed |
B85 Max |
|||
Cold rolled, annealed, and age hardened |
130,000 |
90,000 |
15 |
||
Strip |
Cold rolled and annealed |
B85 Max |
|||
Cold rolled, annealed, and age hardened |
130,000 |
90,000 |
15 |
||
Cold rolled, half hard, as rolled |
C20 Min |
||||
Cold rolled, half hard, and age hardened |
145,000 |
110,000 |
8 |
||
Cold rolled, full hard, as rolled |
C25 Min |
||||
Cold rolled full hard and age hardened |
170,000 |
130,000 |
5 |
||
1/ No yield strength or elongation requirements for sheet and strip under
0.020 inch thick.
8
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