3.5Ni steel is mainly used in the manufacture of petroleum and air separation oxygen production equipment and ammonia synthesis equipment. The minimum operating temperature can reach -101 degrees Celsius. Its high strength, excellent low temperature toughness, and good welding performance are toughness that can be used in deep cold environment. Good material.
With the development of China's petrochemical and other energy industries, the market demand for 3.5Ni cryogenic steel is increasing day by day. As the "fist" product of HGWG Special Steel Technology Group, 3.5Ni steel is the main product in the HGWGNi series of ultra-low temperature steel series. This steel has high technical standards and requires excellent low temperature impact toughness in the use environment of -101 degrees Celsius. It is difficult to produce and it is the "Ace Product" in the field of wide and thick plates. At present, HGWG can produce 3.5Ni steel with a maximum thickness of 150mm, which is at the leading level in China.
On January 15th, HGWG won the bid with the top international steel companies. The products replaced imports and successfully won 1,000 tons of 3.5Ni steel orders.
"The physical quality of HGWG's 3.5Ni steel plate not only reaches the international advanced level, but also the technical indicators such as carbon equivalent and mechanical properties are far superior to the products of top foreign steel companies. At the same time, the replacement of imported HGWG products can not only achieve the production of special steel The thickness of the equipment can be reduced by 30 mm (the thickness of the imported steel equipment should be 120 mm, and the 3.5Ni steel plate produced by HGWG is supported by the excellent low temperature toughness and high strength of the steel plate. 90mm is enough), which will save the purchaser nearly 10 million yuan in equipment purchase cost!" At the end of January, at the technical exchange meeting where the designer, owner, equipment manufacturer and HGWG participated, the design direction strongly recommended HGWG steel plate .
3.5Ni steel "exclusive manufacturing". Before 3.5G steel was successfully developed by HGWG, almost all of the steel plates used were imported from the United States, Europe and Japan, with high prices and long delivery times. In order to promote the localization of 3.5Ni steel plates, HGWG began to develop 3.5Ni steel in 2006, passed the technical review organized by the National Boiler and Pressure Vessel Standard Technical Committee in June 2008, and passed the national boiler and pressure vessel on December 15, 2010. Supplementary technical review organized by the Standard Technical Committee. The thickness of the reviewed steel plate is 150mm. The phosphorus (0.007%) and sulfur (0.003%) in the steel are very low. The metallurgical quality of the steel is excellent. The low-temperature impact energy of the steel plate at -101 degrees Celsius is more than 150J. It is higher than the technical indicators of the American Boiler and Pressure Vessel Standard (ASME SA203E). After the technical review certificate of the 3.5Ni steel plate standard in June 2018 expired, HGWG successfully completed the renewal review with its rich supply performance and good physical quality. The maximum review thickness remains 150mm, ranking first in the world.
The 9Ni steel developed by HGWG passed the technical review of the Standards and Accreditation Committee in 2010 and was successfully recertified in 2015. The maximum thickness of the review is 50mm, which is the highest in China.
5Ni steel is "getting ready". 5Ni steel is an important variety of nickel-based steels, with ultra-high low-temperature impact performance, and is widely used in the manufacture of transportation and storage tank devices such as liquefied ethylene. The new product 5Ni steel developed and produced by HGWG has passed the certification of 6 classification societies including China, the United States and Italy. In August 2018, after initial expert review, material modification, and on-site technical questions and answers, HGWG's 5Ni steel passed the technical review organized by the Standard and Quality Committee with excellent physical quality, and the maximum thickness of the steel plate reached 60mm No more than 50mm), which is the thickest in China.
At present, HGWG's 3.5Ni, 5Ni and 9Ni steel plates have all passed the technical review organized by the Standards and Standards Committee and obtained the qualification to supply fixed and mobile cryogenic container steel plates on land; 5Ni and 9Ni steel plates have passed all mainstream ship grades The company's certification of ABS, BV, CCS, DNV-GL, LR, RINA has obtained the qualification to supply steel for marine low-temperature storage tanks. The project of "large-thickness Ni series cryogenic vessel steel plate and its production method" won the first prize of the provincial patent award, and the project of "development and application of complete set of technology for ultra-low temperature environmental pressure vessel steel sheet" won the second prize of provincial scientific and technological progress.