What material is SA204?
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What materials are SA204GrB and SA214? What do they correspond to in Chinese national standards, and what is their composition? Where can I find it?
For ASME materials, it is necessary to refer to the ASME standards. In Volume 2, Section A of the ASME standards, SA204 specifies molybdenum alloy steel plates for pressure vessels; for Gr.B, the tensile strength ranges from 485 to 620 Mpa. The amounts of the respective alloying elements are less than 1% for Mn, and around 0.5% for Mo. In my opinion, its chemical composition is similar to that of the domestic 20MnMo alloy, but its strength is much lower. SA214 – Resistance-welded carbon steel tubes for use in heat exchangers and condensers; the specific material requirements can be found in the relevant sections of ASME standards, which need not be repeated here
15Mo3 in SA204B and DiN17155 is somewhat similar. As for the composition and mechanical properties, the original poster can check the relevant standards to gain more insights. Wuhan Iron and Steel Group, Pang Long
Standard of the American Society for Testing and Materials: Molybdenum alloy steel plates for pressure vessels. Grades: SA204GrB, SA204GrA, SA204GrC – available in three different strength levels. Standard referenced: ASTM A204/A204M-03. This standard applies to molybdenum alloy steel plates used in welded boilers and other pressure vessels. 【Internal material, provided by Zhang Xiangyun from Wugang Zongsen; for more information, please contact me by phone.】 】 SA-214ERW resistance-welded carbon steel tubes for heat exchangers and condensers. This standard applies to resistance-welded carbon steel tubes with minimum wall thicknesses, used in heat exchangers, condensers, and similar heat transfer equipment. ASTM Standard A450/450M – General requirements for carbon steel, ferritic alloy steel, and austenitic alloy steel. General requirements: The materials provided in accordance with this standard shall meet the requirements for use in the current version of the A450/A450M standards, unless otherwise specified here. Hardness requirement: The hardness value of the pipes shall not exceed 72 HRB. Surface condition: The finished steel pipes shall be free of oxide scale; minor oxides should not be considered as oxide scale.
ASME Volume II, Section A – Material Section, SA204: Molybdenum alloy steel plates for pressure vessels, available in three grades: GRA, B, and C. There are also some differences between ASTM and ASME standards; it is best to confirm this with the client. SA204GrB is commonly used; there have been many coal chemical projects and export projects in recent years. Those in need of standard and technical consultation can contact me. Expert in special steel services.