Patent ID: 7776160

Claim:
An apparatus comprising a cold drawn induction-heated low-carbon steel tube, wherein the low-carbon steel tube is cold-drawn prior to induction heating, said low-carbon steel tube yielding plastically more than about 5% before fracturing at temperatures down to about −100° C. when stress sufficient to cause said low carbon steel tube to so yield is applied to said low-carbon steel tube, said low-carbon steel tube being formed from a low-carbon steel that consists essentially of, by weight, about 0.07% to about 0.12% carbon, about 0.70% to about 1.60% manganese, up to about 0.020% phosphorous, up to about 0.015% sulfur, about 0.06% to about 0.35% silicon, about 0.25% to about 1.20% chromium, up to about 0.65% nickel, about 0.20% to about 0.70% molybdenum, up to about 0.35% copper, about 0.02% to about 0.06% aluminum, up to about 0.05% vanadium, up to about 0.25% residual elements, and the balance iron.