Rebar with vanadium alloy
AssigneeJennmar Corporation
InventorsJohn C. Stankus, Frank Calandra, Jr., Michael Cokus, Ray W. Goetz
Life of this patent
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Abstract
A steel alloy having 0.44-0.52 wt. % C, 1.1-1.6 wt. % Mn, 0.15-0.35 wt. % Si, a maximum of 0.04 wt. % P, a maximum of 0.05 wt. % S, a maximum of 0.45 wt. % Cu and 0.06-0.09 wt. % V. A No. 5 mine roof bolt formed from the steel alloy has a minimum yield strength of 90,000 psi. A mine roof bolt having a cross-sectional diameter of 7/8 inch or 1 inch and formed from the steel alloy has a minimum yield strength of 100,000 psi.
Claims12
A mine roof bolt comprising a rebar formed into an elongated body having a substantially uniform cross section, a first end for entering a bore hole in a rock strata of a mine, and a second end opposite the first end for engagement with a bolting machine to permit installation of the roof bolt within the rock strata, the rebar having 0.44-0.52 wt. % C, 1.1-1.6 wt. % Mn, 0.15-0.35 wt. % Si, a maximum of 0.04 wt. % P, a maximum of 0.05 wt. % S, a maximum of 0.45 wt. % Cu and 0.06-0.09 wt. % V.
A mine roof bolt comprising rebar formed into an elongated body having a substantially uniform cross section, a first end for entering a bore hole in a rock strata of a mine, and a second end opposite the first end for engagement with a bolting machine to permit installation of the roof bolt within the rock strata, the rebar being formed from a steel alloy containing vanadium and said bolt having a minimum yield strength of 90,000 psi.
A mine roof bolt comprising a rebar having a cross-sectional diameter of about 5/8 inch and a minimum yield strength of 90,000 psi.
A mine roof bolt comprising a rebar having a cross-sectional diameter of about 1 inch and a minimum yield strength of 100,000 psi.
A mine roof bolt comprising a rebar having a cross-sectional diameter of about 7/8 inch and a minimum yield strength of 100,000 psi.
Dependencies are inferred from the claim text.