heat treatment for 9% nickel steel plates
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heat treatment for 9% nickel steel plates Nondestructive testing is a technical means to detect the weld defects of large vertical tank and judge whether the weld is qualified by using the characteristics of sound, light, magnetism and electricity without damaging the tested object. Common nondestructive testing methods: ultrasonic testing (UT), magnetic particle testing (MT), liquid penetrant testing (PT) and X-ray testing (RT).
Post weld heat treatment is not generally required for the 9%Ni steels; indeed, EN 13445-4 recommends that PWHT should be avoided. The ASME codes, however, specify a PWHT of 552°C to 585°C for both 9%Ni and 5%Ni alloys when thickness exceeds 51mm (2 inches).Welding liquid natural gas tanks and vessels in 5% and anical properties for 9% nickel steel and nickel-based weld metal can be found in Table 2 A and B. Austenitic or nickelbased consumables are used to guarantee weld metal ductility and to reduce possibilities for hydrogen indu-ced cracking. Unless the con-structions are heavily restrai-ned there is no need for pre-heating or post heat treatment when welding 5-9% nickel steels. Interpass temperatureWelding LNG tanks and vessels in 5% and 9% nickel steelsanical properties for 9% nickel steel and nickel-based weld metal can be found in Table 2 A and B. Austenitic or nickel-based consumables are used to guarantee weld metal ductility and to reduce possibilities for hydrogen indu-ced cracking. Unless the con-structions are heavily restrai-ned there is no need for pre-heating or post heat treatment when welding 5-9% nickel steels.File Size: 182KBPage Count: 4
*Heat treatment for the specimens quenched and tempered: 800 °C (1475 °F), water quenched; 570 °C (1050 °F) for 0.5 hour for each 25 mm of thickness, and subsequently water quenched. The tabulated values in the two tables certify that tensile and yield strengths of 9% nickel alloy steel increase as temperature is decreased.The Influence of Welding Parameters on Brittle Fracture pact properties of 9% nickel steels arise from the fine . grained structure of tough nickel-ferrite free from em- brittling carbide networks. The optimum microstructure and mechanical properties are obtained by a carefully controlled heat-treatment in the production of the steel . These unique properties of the 9% Ni steel plates haveStandard Specification for Steel Plates, 9 % Nickel Alloy heat treatment for 9% nickel steel plates1.1 This specification covers 9 % nickel-alloy steel plates produced by the direct-quenching process. The plates are intended primarily for use in welded pressure vessels. 1.2 The direct-quenching process consists of quenching the plates directly after rolling, without permitting the plates to cool below the critical temperature prior to initiation of the quenching operation, and subsequently tempering the plates.
This specification covers 8 and 9% nickel alloy steel plates for use in the water quenched and tempered condition intended for the fabrication of welded pressure vessels. The materials shall be available in two types, namely Type I and II, having different chemical compositions.Standard Specication for Pressure Vessel Plates, Alloy heat treatment for 9% nickel steel plates5. Heat Treatment 5.1 All plates shall be heat treated in accordance with 5.2. Shell plates and other parts, including heads and reinforcing pads, which are heated for forming, shall be heat treated after forming in accordance with 5.2. 5.2 Heat Treatment Procedure: 5.2.1 First Normalizing TreatmentHeat the plate to aStandard Speci cation for Pressure Vessel Plates, Alloy heat treatment for 9% nickel steel plates22.214.171.124 Prior to the tempering treatment, the plates may be subjected to an intermediate heat treatment consisting of heating to a temperature in the range from 1165 to 1290¡F [630 to 700¡C] for Type I, or 1185 to 1310¡F [640 to 710¡C] for Type II, holding at that temperature for a minimum of 1 h/in.
nickel steel plate9% nickel steelnickel plate stainless steelhow to nickel plate metaleffect of nickel in steelhigh nickel steelnickel alloy platenickel plate roadPRODUCTION AND PROPERTIES OF HIGH-STRENGTH 9%-nickel-alloyed high-strength steels for low temperature applications produced by ThyssenKrupp. Further an insight into industrial production experience and an illustration of the application of nickel steel plates in projects around the world is given. KEYWORDS 5% nickel-alloyed steel, 9% nickel-alloyed steel, Production route, Material heat treatment for 9% nickel steel platesFile Size: 348KBPage Count: 11Nickel plates - VoestalpineWe offer 5%- and 9%-nickel steels according to EN 10028-4 and ASTM 553 in plate thickness range up to 70 mm, width up to 3,800 mm, length up to 12,700 mm and up to 13 tons per single plate. The revision of API Standard 620 in 2018 has made it possible to use ASTM steel grades A 645 Gr A and Gr B for the construction of ethylene, LPG or LNG tanks.
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Heat-treatment Fixture. 406 x 406 x 50 Material Trays for Precision Gear Parts Heat-treatment 1.4849 EB22280. 1352x754x50mm Heat treatment Furnace Jig System EB22140. Cr17Ni35 Heat Steel Cast Trays for Annealing Furnaces up to 1000 degree Celsius EB22082. High Alloy Material BaskersEB22278. Centrifugal CastingsMECHANICAL CHARACTERISTICS OF 9% Ni STEEL and fracture toughness within X-grooved weld heat-affected zone (HAZ) of newly developed 9% Ni steel, which was SMAW welded, was investigated. These materials were produced by QT (quenching, tempering) heat treatment. The weld metal specimens were prepared by taking the same weld procedure applied in actual inner shell of LNG storage tank.Cited by: 10Publish Year: 2012Author: Yong-Keun Yoon, Jae-Hoon Kim, Kyu-Taek Shim, Young-Kyun KimHow to Weld 9% Nickel Steel for cryogenic tanksPreheat for 9% Nickel steel. Preheat Joints in 9% Nickel steel made with austenitic weld metals are relatively immune to cold cracking difficulties. Nevertheless, it is suggested that plate over 1in. (25mm) in thickness be preheated to about 100ºF (35ºC) and that lighter plates not be welded below the dew point.
The following procedures for heat treatment are recommended in the standard mentioned above: 1. Double Normalize and Temper (NNT) ASTM A353. Heat the 9% nickel steel plates to a uniform temperature of 1650°F; 2. Quench and Temper (QT) ASTM A553 Heat 9% nickel steel plates Heat Treating of Nickel and Nickel AlloysNickel and nickel alloys may be subjected to one or more of five principal types of heat treatment, depending on chemical composition, fabrication requirements and intended service. These methods include annealing, stress relieving, stress equalizing, solution treating and age hardening.Fracture Toughness of 5% Nickel Steel Weldmentsrently used in welding 9% nickel steel. The data demonstrated that weld ments made of this 5% nickel steel were suitable for cryogenic service, provided reasonable welding heat in puts were used. For the past year, fatigue and frac ture toughness tests have been con ducted on base plate and weld ments. Results of this work are re
40Cr steel plate is one of the most widely used steel in machinery manufacturing. After tempering, it has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. The hardenability of steel heat treatment for 9% nickel steel plates is good. It can be hardened to Ф28 ~ 60mm during water quenching and Ф15~40mm during oil quenching. When the hardness is HB174~229, the relative cutting workability is 60%. The steel is suitable for making medium-sized plastic molds.