Threaded Rod must have high fatigue strength, elasticity, rigidity and toughness, and strength and toughness is conflicting. Threaded rod Rod, is a slender rod, heat treatment is not suitable for complex drilling hollow steel drill rod, overall performance can only get the fatigue strength, elasticity, rigidity and toughness with optimum heat treatment process through. Threaded Rod ends are part of the package solder joins the group, its failure mechanism is fretting wear and impact hexagonal hollow steel, therefore, require a threaded portion of the surface of high hardness wear-resistant hollow steel, the center has enough toughness to prevent breakage. As we all know, the performance of the hydraulic drill rod raw materials, often after heat treatment in order to give full play to their maximum potential, therefore, the choice of material is often considered together with the heat treatment process. Threaded Rod a foreign material selection Currently, foreign threaded drill rod material summed up in two series. A series is a low-carbon, high-strength, high hardenability, high toughness steel CrNiMo-based system, the carbon content of about 0.25%, Ni content of about 3 percent, the most representative of the steel is 25CrNi3Mo, heat treatment process route is: the overall control of the cooling carburizing → → → threaded portion of the quenching and tempering. After the whole carburizing controlled cooling the rod body to achieve the desired hardness, rigidity and ensure an elastic rod member; subsequent threaded portion quenching, tempering the threaded surfaces to obtain high hardness and high compressive stress to obtain a high fatigue strength and high wear resistance . Most foreign Threaded Rod are using this material and heat treatment process route. Another series is still CrNiMo, but the carbon content of between 0.30% to 0.45%, some countries have increased Cr and Ni V or adjust the content of the heat treatment process is used to control cooling hollow rolled steel, ensuring rod hardness; Threaded parts of quenching after induction hardening to obtain high surface hardness and high compressive stress, but also has high fatigue strength and high wear resistance. This series also has a lot of countries have adopted, but generally only for D45, D51, D38 Arbors also used a small amount of drill rod. 2 Threaded Rod material of choice for B22 rock drill and drill out the screw connection within M16 * 2 or side teeth, length of 0.4 to 2.8 m. Anchor drill pipe length of 1 m / root, the user need other specifications can be customized. Technical Specifications Model B22 B22 drill pipe thread connection specifications M14 * 2 M16 * 2 length 0.4-2.8 B22 air drill made of high quality hollow hexagonal, made of 55SiMnMoV, tail supporting various hydraulic bolt rig, the head can be connected within and outside buckle various bits. Anchor bolt drill pipe connections connected sets, B22 anchor drill pipe bending and strong, durable, easy disassembly, easy to operate, can also be designed according to user requirements for processing drill anchor connected sets. Rock drill rod, hollow steel, Shandong Drilling Co., Ltd. Peng Rui Peng Rui provided by Shandong Drilling Technology Limited. Drilling Ltd. Shandong Peng Rui (www.zbpengrui.com) strong, credible, Shandong Zibo metal cutting and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Drilling Ltd. Shandong Peng Rui and you hand into the brilliant, for a better future!