This specification covers the requirements for forged bolts in DTD5638, EN 2952, EN 3219 or AMS5662 material with rolled underhead radii. The bolts will develop a minimum tensile strength of 1275 MPa (185,000 lbf/in²) at room temperature and 1000 MPa (145,000 lbf/in²) at 650°C.
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