Special Section Tube

Sunny Steel Enterprise Ltd. is a cold-forming section tube manufacturer. With many years’ producing practice, research and development, depending on the qualified and talent working team, we design and manufacture more than 2,000 sets of moulds for special section tube and adaptive deformation machines which are adjusted to the characteristics of the domestic material. We can produce welded and seamless structural special section with the compound sections, square, rectangle, ellipse, semicircle, arch, sector, triangle, hexagon and octagon, etc. The material consists of carbon steel, stainless steel ,Ti alloy. Our products comply with various standards such as GB, JIS, DIN, EN, ASTM, etc. The outside dimension of our product varies from 20 by 20mm to 500 by 500mm.

Mechanical tubes:
DIN 1629: St37.0, St44.0, St52.0; GB/T8162: 10#, 20#, 35#, 45#, Q345A, Q345B, Q345C, Q345D, Q345E; ASTM A53: ASTM A53 Grade A,ASTM A53 Grade B( Dowload: ASTM A53 standard)

Cold drawn precision seamless steel tubes
1) Standard: DIN2391 DIN2393 GB/T3639 EN10305-1 EN10305-4
2) Grade: 10# 20# 35# 45# ST37, ST45, ST52 E235 E345 …….
3) Sizes: O.D :6mm- 120mm; W.T:0.5~30.0mm
4)Delivery condition: Cold processing/hard (BK) Cold processing/soft (BKW)
Relief annealing after cold processing (BKS)
Annealing (GBK)
Normalizing (NBK)

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