What is the chemical composition of ASTM A387 Grade 12?

ASTM A387 Grade 12 is a chromium-molybdenum alloy steel for high-temperature pressure vessels, characterized by about 1% Chromium (Cr) and 0.5% Molybdenum (Mo), with key elements including Carbon (C), Manganese (Mn), Silicon (Si), Phosphorus (P), and Sulfur (S) within specific ranges for elevated service, providing good oxidation resistance and strength.

Chemical Composition Table (Weight Percent, %)

Performance Characteristics

Heat Resistance: It boasts excellent high-temperature strength and creep resistance, enabling long-term operation at elevated temperatures without deformation or failure.

Corrosion Resistance: It has good resistance to corrosive media such as sulfides, making it suitable for corrosive environments like sulfur-containing oil and gas fields. Meanwhile, it also exhibits outstanding resistance to hydrogen embrittlement, hydrogen corrosion, hydrogen blistering, and sulfide stress corrosion cracking (SSCC).

Weldability: It features excellent weldability, allowing for easy machining and forming, which facilitates the fabrication of components with various complex shapes.

Application Fields

ASTM A387 Grade 12 steel plate is widely used in the following fields due to its superior high-temperature resistance and corrosion resistance:

Petrochemical Industry: Used in manufacturing key equipment such as reactors, storage tanks, and pipelines.

Power and Nuclear Power Industry: Used in manufacturing high-temperature and high-pressure equipment such as boilers, steam generators, pressure vessels, and heat exchangers.

Aerospace Industry: Used in manufacturing high-performance equipment such as aircraft engines and rockets.

GNEE manufactures ASTM A387 Grade 12 steel plates with strict adherence to these chemical composition limits, using advanced melting technologies (EAF + ladle refining + vacuum degassing) 

Request A Quote

What is A387 gr 12 material?

A387 Grade 12 Class 2 is a high quality chrome molybdenum steel which is ideal for elevated temperature service and offers excellent anti corrosion characteristics. The steel has a wide range of uses including industrial boilers and pressure vessels, especially in environments where high temperature levels are common.

What is the chemical composition of SA 387 GR 11 Cl 2?

ASTM A387 GR 11 CL 2 Plates is designed with the composition of chemicals such as carbon, silicon, phosphorous, chromium, sulfur, molybdenum, and manganese. Alloy ASTM A387 is made with specifications such as different standards, finishing, hardness, form, width, and thickness.

What is the difference between A182 and A387?

Both ASTM A182 grade F11 class 2 and ASTM A387 grade 22 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

What is the composition of ASTM A387 Grade 22?

Composition: ASTM A387 Grade 22 typically contains around 2.25% molybdenum and 1% chromium, enhancing its strength and resistance to oxidation at high temperatures. Mechanical Properties: This grade offers excellent mechanical properties, making it suitable for use in environments subject to high stress and pressure.

GNEE Steel also supplies a variety of boilers and pressure vessel steel plates, such as A204 Grade B,A515 Grade 70,A537 Class 1,SA387 Grade 11 Class 1,P265GH,S537 Class 2,P355Q,P275N,P355N,P690Q,Q345R, etc. If you want to know more about other types of steel plates, you can call the consultation hotline at +8615824687445 or send an email to alloy@gneesteelgroup.com. You are welcome to consult us, and we are very willing to answer your questions.