//Seamless Steel Pipes for Boilers
Seamless Steel Pipes for Boilers 2018-09-27T01:08:22+00:00

Project Description

Seamless Steel Pipes for boilers are often operated under high temperature and high pressure. Pipes will oxidize and corrode under the action of high temperature flue gas and water vapor. Therefore, steel pipes are required to have high durability, high oxidation resistance and good organization. Stability, and also, there are certain requirements for the microstructure, grain size and decarburization layer of the finished steel tube. The requirements for the manufacturing process for seamless steel pipes for boilers are relatively high. WANSTEEL STAINLESS STEEL PIPE TECHNOLOGY CO., LTD. has 15 years of experience in manufacturing seamless steel pipe for boilers, guaranteeing product quality. If you are interested, you can email us. Will reply as soon as possible

Chemical Composition(%): 

Steel Grade Chemical Analysis  %
Grade Material NO. C max. Si max. Mn P max. S max.
St 30 Si 1.0211 0.1 0.3 =0.55 0.025 0.025
St 30 Al 1.0212 0.1 0.05 =0.55 0.025 0.025
St 35 1.0305 0.17 0.35 =0.40 0.025 0.025
St 45 1.0408 0.21 0.35 =0.40 0.025 0.025
St 52 1.058 0.22 0.55 =1.60 0.025 0.025
Can join the alloy elements: Nb:=0.03%;Ti:=0.03%;V:=0.05%;Nb+Ti+V:=0.05%

Mechanical Properties:

   Delivery State BK BKW BKS GBK NSK
Grade
Grade Material NO. Tensile Strength
(N/mm2)
Min.
Elongation
%
Min.
Tensile Strength
(N/mm2)
Min.
Elongation
%
Min.
Tensile Strength
(N/mm2)
Min.
Yield Strength
(N/mm2)
min.
Elongation
%
Min.
Tensile Strength
(N/mm2)
Min.
Elongation
%
Min.
Tensile Strength
(N/mm2)
Min.
Yield Strength
(N/mm2)
min.
Elongation
%
Min.
St 30 Si 1.0211 430 8 380 12 380 280 15 280 30 290-420 215 30
St 30 Al 1.0212 430 8 380 12 380 280 15 280 30 290-420 215 30
St 35 1.0305 480 6 420 10 420 315 14 315 25 340-470 235 25
St 45 1.0408 580 5 520 8 520 375 12 390 21 440-570 255 21
St 52 1.058 640 4 580 7 580 420 10 490 22 490-630 355 22

Project Details

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