Which standards do you follow when choosing domestic 9%Ni steel?
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Is it 06Ni9DR in GB 3531-2014 or 9Ni590B in GB 24510-2009? The former requires a higher impact energy, while the latter requires a higher yield strength; the requirements for tensile strength and elongation are the same
This post was last edited by youlong1008 on 2016-5-1 at 22:06. The domestically produced 9Ni steel is now referred to as 06Ni9DR steel plate, and it has been included in the standard GB3531-2014. Standard GB 24510-2009 was formulated when 9Ni steel began to be produced domestically; it was based primarily on the European standard EN10028-4, along with standards such as ASME SA-553. At that time, it was essentially a translation of those European standards. There are several different grades of 9Ni steel, and these grades had certain significance at that time. As localization progressed, when companies such as Taiyuan Iron and Steel, Nanjing Iron and Steel, Anshan Iron and Steel, and Baosteel began mass production (with Taiyuan Iron and Steel being the first to do so), the technology was already quite mature. Taking into account the problems encountered in actual use, domestic 9Ni steel, namely 06Ni9DR steel plates, was used for low-temperature vessel steel plates. Therefore, it is recommended to follow GB3531-2014 (except where individual design institutes have specific requirements). The name of the standard GB3531-2008, \"Low-alloy steel plates for low-temperature pressure vessels\", refers to low-alloy steel plates; note that it is low-alloy steel plates. After the inclusion of 06Ni9DR steel plates, the name changed to GB3531-2014, \"Steel plates for low-temperature pressure vessels\", with the term \"low-alloy\" removed, as the alloy content in 06Ni9DR steel plates is very high, making them high-alloy steel plates. At the same time, due to the high strength of the 06Ni9DR steel plate (680 MPa), the upper limits for the maximum tensile strength in many standard tables have also been adjusted.
Sir, under the leadership of Ansteel, a new version of GB 24510 is set to be released this year; it includes nickel steels with 1.5%, 3.5%, and 5% nickel content, and imposes strict limits on sulfur and phosphorus levels. It seems to be more practical in application.
For the use of pressure vessels, GB3531 should be selected; it is a supporting standard referenced in GB150.2, and was previously an appendix to GB150.2.
The 9Ni% steel we use now still follows the standards set by the design institute. The requirements are much higher than the **standard.
Master, could you provide one of the standards you mentioned? :P