And no uniform definition of the concept of special steel, the special steel is generally considered a special steel type chemical composition (alloyed), using a special production process, with a special organization and performance to meet special needs. Special steels have higher strength and toughness, physical properties, chemical properties, biocompatibility and process properties than ordinary steels. China and Japan, the European Union's definition of special steel is relatively close, the special steel is divided into three categories of high-quality carbon steel, alloy steel, high alloy steel (alloying elements greater than 10%), of which alloy steel and high alloy steel account for special steel output 70%. Main steel grades, special carbon structural steel, carbon tool steel, carbon spring steel, alloy spring steel, alloy structural steel, ball bearing steel, alloy tool steel, high alloy tool steel, high speed tool steel, stainless steel, heat resistant steel , as well as high-temperature alloys, precision alloys, electrothermal alloys, etc. At present, there are nearly 2,000 special steel grades and about 50,000 varieties in the world. In addition to a wide variety of special steels, the specifications also show different characteristics from ordinary steel. In addition to plates, tubes, wires, belts, rods and profiles, there are composites, surface alloys, surface treatments, precision forgings, precision castings , powder metallurgy products, etc.
Brass fittings for instrumentation, refrigeration, hydraulic, pneumatic, automotive and industrial applications.
JKLONG brass fittings are produced in modern factories used exclusively for valve manufacturing. Each phase of the manufacturing process, from selection of raw materials to casting, forging, machining, assembly and testing, has been improved with automated production facilities and unparalleled production technology. Standardization and automation yield JKLONG brass fittings of superior quality and higher uniformity at competitive prices supported by incomparably prompt delivery.
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Ningbo Jiekelong Precision Manufacturing Co., Ltd. , http://www.jklvalve.com