Method for producing normalized grade D sucker rods
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United States of America Patent
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May 23, 1989
Grant Date -
N/A
app pub date -
Jul 8, 1987
filing date -
Jul 8, 1987
priority date (Note) -
Expired
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Abstract
An article of manufacture is provided in the form of a sucker rod for use in sucker rod pumps. The sucker rod is formed of a medium carbon manganese-molybdenum steel consisting essentially of about 0.25% to 0.45% carbon, about 1.2% to 1.8% manganese, about 0.20% to 0.55% molybdenum, up to about 0.03% niobium, and the balance essentially iron, the sucker rod being in the normalized condition and being characterized by a yield to tensile ratio in excess of about 0.572, a tensile strength of at least about 115 ksi, and by a microstructure consisting essentially of acicular ferrite, fine pearlite and bainite.
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