A387 Grade 11 (K11789) material is a kind of alloy steel plate for high temperature service. It is a pressure vessel grade steel which is used commonly by fabricators who supply the oil and gas industry.
A387 Grade 11 steel plates have some excellent features to offer such as flexibility, durability, abrasion-resistant, and power saving features, rustproof, dimensional accuracy, consistent performance, leak-proof, corrosion resistance, high strength, thermal resistance, chemical resistance, excellent finish and more.
A387 Grade 11 Alloy Steel Plate Specification
Common grades: grade 2, grade 12,
A387 gr.11, gr.22, gr.22l, gr.21, gr.21l, gr.5, gr.9, gr.91
Thickness : 5-100mm
Width : 1000mm, 1500mm, or as required
Length : 2000mm, 4000mm, or as required
Delivery state : hot rolled, cold rolled
Application : boilers, pressure vessels
A387 Grade 11 (K11789) Chemical Composition, %
| Grade |
UNS |
C |
Mn |
P max. |
S max. |
Si |
Cr |
Mo |
| Grade 11 |
K11789 |
0.04-0.17 |
0.35-0.73 |
0.025 |
0.025 |
0.44-0.86 |
0.94-1.56 |
0.40-0.70 |
Application for A387 Grade 11 (K11789) Steel
A387 Grade 11 alloy steel plates are used in some typical applications such as in chemical and allied industries, pressurized vessels, heat exchangers, ducting and pipe works, food and dye production, gas applications, fabricators, industrial boilers and other severe environments, tanks, pickling racks, flanges, fitting & valves, and so on.
Due to the materials excellent corrosion resistant properties, ASTM A387 GRADE 91 Class 1 is also an option for use in sour service environments. The material has good weldability and with its heat resistant qualities, the material is a highly versatile steel which can be used in numerous applications.
