JIS G 3206-1993 High-strength chromium-molybdenum steel forgings for high-temperature pressure vessels

properties of steel 565 14/06/2023 1054 Sophia

JIS G 3206-1993 High-Strength Chromium Molybdenum Steel Forgings for High-Temperature Pressure Vessels This standard prescribes the requirements for high-strength chromium molybdenum steel forgings for use in high-temperature pressure vessels. High-strength chromium molybdenum steel forgings for ......

JIS G 3206-1993 High-Strength Chromium Molybdenum Steel Forgings for High-Temperature Pressure Vessels

This standard prescribes the requirements for high-strength chromium molybdenum steel forgings for use in high-temperature pressure vessels. High-strength chromium molybdenum steel forgings for high-temperature pressure vessels are defined as those that meet the requirements of the standard and have the strength for working out at temperatures over 450 ℃ and have a higher creep resistance than AISI 430 or JIS STS 431 materials.

High-strength chromium molybdenum steel forgings shall be produced with the assistance of mill machines, hot forming and/or thermal cutting/welding processes. The formation process shall be designed to ensure that the temperature, pressure and time parameters given in the standard are met. Requirements regarding dimensions, shape and position, surface quality, and heat treatment are also included in the standard.

High-strength chromium molybdenum steel forgings shall conform to the mechanical properties specified in this standard. Tensile tests shall be made on samples taken from finished forgings in accordance with the procedures specified in the standard. The base metal shall meet the requirements given in this standard in respect of Charpy V-notch impact energy and bend test.

This standard applies to high-strength chromium molybdenum steel forgings for pressure vessels used in petrochemical and other industries. This standard does not apply to forgings for use in boilers. The most important characteristics of these forgings are: high tensile strength, good resistance to high-temperature creep and good high-temperature corrosion resistance.

The requirements and test methods for high-strength chromium molybdenum steel forgings for high-temperature pressure vessels are prescribed in this standard. The other aspects of inspection and quality control, acceptance, marking and inspection documents, as well as the preparation, keeping and transmission of documents, are also covered in this standard.

The primary purpose of this standard is to ensure that high-strength chromium molybdenum steel forgings used in high-temperature pressure vessels meet the requirements of strength, toughness, creep and corrosion resistance, which are critical to their safe operation. This standard is designed to ensure that the forgings produced meet the required quality and safety standards and therefore enable all users of forgings to perform efficient, cost-effective and safe operations.

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properties of steel 565 2023-06-14 1054 SerendipitySparkle

JIS G 3206-1993 high temperature and pressure vessel high strength chromium molybdenum steel forging is a high temperature and pressure vessel forging standard specified by the Japanese Industrial Standard. The standard is issued by the Japanese Industrial Standards Committee and the Ministry of E......

JIS G 3206-1993 high temperature and pressure vessel high strength chromium molybdenum steel forging is a high temperature and pressure vessel forging standard specified by the Japanese Industrial Standard. The standard is issued by the Japanese Industrial Standards Committee and the Ministry of Economy, Trade and Industry to ensure uniformity of Japanese product quality. The standard applies to the chromium-molybdenum steel forgings used in pressure vessels and boilers operating at temperatures over 650 degrees Celsius with a design pressure of up to 10.5 megapascals. It has been used by thousands of Japan’s industrial manufacturers since its introduction in 1959.

JIS G 3206-1993 standard requirements for high temperature and pressure vessel high strength chromium molybdenum steel forging include chemical composition, mechanical properties and forging dimensions. The requirement for mechanical properties limits the tensile strength of the forgings to 760 MPa, yield strength to 690 MPa, and permeability to 380 HV. The manufacturing process also has to meet minimum parameters set forth by the standard, such as heat treatment temperature, cooling rate, heat treatment temperature uniformity, and heat treatment method.

Moreover, the forgings must meet the requirements for weldability, including no cracks or disclocations, no lamination or folding, no porosity, and minimum material shrinkage. The standard also requires a test certificate that includes product name, verification number, batch number, chemical composition, forging dimensions, and mechanical properties results. All the requirements aim to ensure that the high temperature and pressure vessel high strength chromium molybdenum steel forging is able to resist thermal cycling and other deformation during service, thus ensuring safety and reliability.

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