Steel strap and method of making

Details Steel strap and method of making Steel strap and method of making

1996-10-31

1997-08-12

Ip, Sikyin

Metal treatment

Stock

Ferrous

148603, 420 8, 420121, 420129, C22C 3800, C21D 802

Patent

active

056561032

ABSTRACT:
A non-heat treated, high tensile strength, highly formable steel strap that may be applied in a tensioned loop about packaged articles with a strapping machine. The strap is fabricated from a steel comprising approximately, 0.20 to 0.25 percent carbon, 0.30 to 0.60 percent manganese, 0.04 percent maximum phosphorus, 0.05 percent maximum sulfur, an aluminum in an amount sufficient for full aluminum kill, 0.10 percent maximum silicon, and a boron to free nitrogen ratio of approximately between 1.07 to 1.43. The steel is coiled at a coiling temperature of approximately 1100 degrees Fahrenheit to reduce self-annealing that occurs during air cooling after coiling. The coiled steel is then reduced approximately 80 percent by cold rolling to increase tensile strength before it is fabricated into steel strap which may be protected with a zinc coating.

REFERENCES:
McGannon, Harold E., "The Making, Shaping and Treating of Steel", 8th Ed., 1964.
Metals Handbook, 1948 edition, The American Society for Metals, 1948, pp. 352-353.

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