Bethlehem Steel RQC ASTM A678 RQC90 3/16 to 1-1/2 in. thick, steel plate

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Bethlehem Steel RQC ASTM A678 RQC90 3/16 to 1-1/2 in. thick, steel plate (discontinued **)
Categories:	Metal; Ferrous Metal; ASTM Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Bethlehem's proprietary RQC series of steel plate grades are an extension of ASTM A 678 and are offered in higher strength levels and thicknesses greater than those covered by the specification. The plate is heat treated by quenching and tempering to develop the specified high strength levels. The addition of copper is permitted to improve the corrosion resistance of the plate. Normal uses are demanding structural, machinery and industrial uses where weight reduction is important and notch toughness is a design consideration. Information provided by Bethlehem Steel Corporation Data published in 1997. Bethlehem Steel in no longer in business.
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Physical Properties	Original Value	Comments

Density	7.80 g/cc	Typical of ASTM Steel

Mechanical Properties	Original Value	Comments
Hardness, Brinell	210	based on conversion from tensile strength
Hardness, Rockwell B	95	based on conversion from tensile strength
Tensile Strength at Break	>= 100000 psi
Tensile Strength, Yield	>= 90000 psi
Elongation at Break	>= 18 %	in 2"
Bend Radius, Minimum	6.0 t	≤3/4" W; ASTM A6 PARA. S14
	8.0 t	>3/4 to 1-1/2" W; ASTM A6 PARA. S14

Component Elements Properties	Original Value	Comments
Boron, B	>= 0.00050 %
Carbon, C	<= 0.21 %
Copper, Cu	<= 0.35 %
Iron, Fe	>= 97.5995 %
Manganese, Mn	<= 1.35 %
Phosphorus, P	<= 0.040 %
Silicon, Si	<= 0.40 %
Sulfur, S	<= 0.050 %

**
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NBETH072 / 15431

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