Technical

Production Processes, Characteristics, and Applications The spherical tungsten carbide powder is generally made from regular cast tungsten carbide power or the mixture of tungsten (W), tungsten carbide (WC) and carbon (C). There are primarily two production processes: (1) the mixture of tungsten …

Characteristics and Production Process The cast tungsten carbide powder has a WC and W2C eutectic structure which exhibits dark gray appearance. It exhibits outstanding wear- and impact-resistance, as well as high hardness property, at high temperatures. The sizes of tungsten …

Tungsten carbides are used extensively in both weld overlay and thermal spray hardfacing applications such as drilling tools, ripper teeth, ditchdigger teeth, plowshares, valve seats, and mining extraction equipment. They’re extremely important for severe abrasion/ wear resistance and cutting applications. Tungsten …

AWS A5.13/A5.13M is the specification for surfacing electrodes for shielded metal arc welding. The first edition was published by American Welding Society (AWS) in 1956. It evolved to two-set series later: A5.13 and A5.21. AWS A5.21 stipulates solid bare electrodes and …

The AWS A5.13 EFe1 is a typical iron base hardfacing electrode. It has a pearlitic structure, which results from low carbon and low amounts of other alloying elements. The EFe1 electrodes are mainly used for buildup overlays and restoration of …

What’s Weld Overlay or Weld Cladding? Weld overlay, also known as weld cladding, is a typical surfacing process in which a relatively thick layer of weld metal is weld cladded to the base metal surface. Depending on the wear-resistance or corrosion resistance properties …

What Is Hardfacing? Hardfacing, literally speaking, means to harden the surface of the metal. It is a typical surfacing form through which a hard, wear-resistant material is deposited onto the base metal (substrate) by either weld overlay or thermal spray …

According to ASME BPVC Section II, the 9% nickel steel is classified into material group D as a low carbon alloy steel. Its nominal coefficients of thermal conductivity (TC) and thermal diffusivity (TD) at elevated temperatures are listed in below two …

The physical properties of 9% nickel steel cover elasticity, density, Poisson’s ratio and electrical resistivity. These properties apply to 9-Ni steel in both NNT and QT conditions of heat treatment. Modulus of Elasticity (at 70°F): 27000 ksi. Modulus of Elasticity …

The Charpy V-notch impact test is often used to evaluate the brittleness of the 9% nickel steel, which is subjected to extremely rapid strain rate especially at cryogenic temperatures. It shall be conducted in accordance with ASTM E23. The V-notched …

NFPA 59A is the standard for the production, storage, and handling of liquefied natural gas (LNG). This is the latest 2016 edition, which was prepared by the Technical Committee on Liquefied Natural Gas and supersedes all previous editions. This standard was …

Low carbon 9% nickel steel plates are often used at service temperature cycling from room temperature to cryogenic temperature. It is necessary to study the tensile properties and hardness at different temperatures. The specimens for Fig-1 are 9% nickel steel plates …