The serial products are made of high quality low carbon alloy steel. The forging quality is strictly controlled by use of the heating patent technology developed independently .The integral mechanical performance is guaranteed through the integral quenching and tempering treatment with the domestically advanced heat treatment technical equipment. The tolerance quality and strength are also well controlled with the rod head digital controlled process. The integral performance of sucker rod is at last guaranteed by means of techniques above.

The grade D
sucker rods produced by our company have well tenacity, high tensile strength and excellent performance that can stand the larger asymmetry cyclic loading and resist the slight corrosion. So the grade D sucker rods are applied abroad in oil production field.