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ASTM Standard for Pressure Vessels Steel Plate

1. What is pressure vessel steel plate?

Boiler pressure vessel steel plates are a large category of steel plates. Pressure vessel plates are used to manufacture steam boilers, pressure vessels and other pressure vessel structural parts. This type of steel plate is subjected to certain air and water pressures, as well as different temperature environments, such as high, medium and low temperatures, so the requirements for this type of steel plate are relatively strict.

Pressure vessels are equipment with specific functions and withstand certain pressures in industrial production, including storage and transportation containers, reaction containers, heat exchange containers and separation containers.

Pressure vessel steel plates are key materials for manufacturing pressure vessel shells, including carbon steel, carbon manganese steel, microalloy steel, low alloy high strength steel and low temperature steel. Pressure vessel steel plates are special materials related to the national economy and people's livelihood, and are short-term products in the metallurgical industry.


2. Types and heat treatment of pressure vessel steel plates

(1) Types: According to composition, they can be divided into two categories: carbon steel plates and alloy steel plates; according to strength, they can be divided into high, medium and low pressure steel plates; according to the use environment, they can be divided into high, medium and low temperature steel plates and corrosion-resistant steel plates.

(2) Heat treatment: hot rolling, normalizing, controlled rolling, annealing, tempering and normalizing, quenching and tempering.



3. What is the ASTM standard for pressure vessels steel plate?

(1) ASTM A387/A387M

ASTM A387 boiler container plate is a chromium-molybdenum alloy steel plate suitable for welding boilers and high-temperature pressure vessels. ASTM A387 boiler container plate is divided into grades 5, 9, 11, 12, 22, 91 and other grades according to the alloy elements contained. Except for grades 21L, 22L, 91 and 911, each grade of ASTM A387 boiler container plate has two tensile strength categories according to its heat treatment: Class 1 and Class 2.


(2)ASTM A240/A240M

This specification covers chromium, chromium-nickel, and chromium-manganese-nickel stainless steel plate, sheet, and strip for pressure vessels and for general applications. The steel shall conform to the requirements as to chemical composition specified. The material shall conform to the mechanical properties specified.


(3)ASTM A515/A515M

This specification covers carbon-silicon steel plates primarily for intermediate- and higher-temperature service in welded boilers and other pressure vessels. Plates are available in three grades having different strength levels: Grade 60; Grade 65; and Grade 70. The steel shall be killed and made to a coarse austenitic grain size practice. The steel shall conform to the chemical requirements specified. Tension test shall be made to conform to the requirements specified.


(4)ASTM A204/A204M

This specification covers molybdenum alloy steel plates, intended particularly for welded boilers and other pressure vessels. Plates under this specification are available in three grades having different strength levels: Grade A; Grade B; and Grade C. The steel shall be killed. The steel shall conform to the chemical requirements specified. Tension tests on plates shall conform to the requirements specified.


(5)ASTM A20/A20M

This specification covers a group of common requirements that apply to rolled steel plates for pressure vessels. The steel shall be made in an open-hearth, basic-oxygen, or electric-arc furnace process. Sampling and methods for chemical analysis are discussed. Yield strength tests, tension tests, and notch-toughness tests shall be made in accordance to the product specification to conform to the specified requirements.

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