High strength square tube 15CRMO square rectangular tube with multiple materials, one-stop supply source manufacturer






Process Classification

Square and rectangular tubes are classified according to production processes: hot-rolled seamless square tubesCold drawn seamless square tube, extruded seamless square tube, welded square tube。

Among them, welded square tubes are further divided into

1. Divided by process - arc welded square tube, resistance welded square tube (high-frequency, low-frequency), gas welded square tube, furnace welded square tube

2. Divided by weld seam - straight seam welded square tube, spiral welded square tube.Material Classification

Square tubes are classified by material: plain carbon steel square tubes, low-alloy square tubes.

1. Ordinary carbon steel is divided into Q195, Q215, Q235, SS400, 20 # steel, 45 # steel, etc.

2. Low alloy steel is divided into Q345, 16Mn, Q390, ST52-3, etc.Classification of Production Standards

Square tubes are divided according to production standards: national standard square tubes, Japanese standard square tubes, British standard square tubes, American standard square tubes, European standard square tubes, and non-standard square tubes.Classification of cross-sectional shapes

Square tubes are classified according to their cross-sectional shape:

1. Simple section square tube: square square tube, rectangular square tube。

2. Complex cross-section square tube: flower shaped square tube, open shaped square tube, corrugated square tube, special-shaped square tube。