We are specialized in making big diameter&thick square&rectangular steel tubes with different standar.
Our main products: square & rectangular steel tube
Dimentions: 20*20-500*500 mm
thickness : 2-25mm material: Q235B Q345B 20# ST37,ST44,ST52.,ASTM A53, ASTM A 106 and so on Implement of standars: GB/T 3094-2000 , GB/T 6728-2002 , JISG 3466 and so on Other products : seamless steel tube , ...
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