Custormized Size and Type
SHANQI
Product Description
Carbon Mild Steel Square Tube is used in most general purpose applications. Low carbon content relatively good mechanical properties along with high quality weldability make it a common choice in fabrication and structural applications. Easily drilled, welded and bolted.
Grade | Level | Chemical composition,% | Deoxygenation method | ||||
C | Mn | Si | S | P | |||
No greater than | |||||||
Q195 | - | 0.06~0.12 | 0.25~0.50 | 0.30 | 0.050 | 0.045 | F、b、Z |
Q215 | A | 0.09~0.15 | 0.25~0.55 | 0.30 | 0.050 | 0.045 | F、b、Z |
B | 0.045 | ||||||
Q235 | A | 0.14~0. 22 | 0.30~0.65 | 0.30 | 0.050 | 0.045 | F、b、Z |
B | 0.12~0.20 | 0.30~0.70 | 0.045 | ||||
C | ≤ 0.18 | 0.35~0.80 | 0.040 | 0.040 | Z | ||
D | ≤ 0.17 | 0.035 | 0.035 | TZ | |||
Q255 | A | 0.18~0.28 | 0.40~0.70 | 0.30 | 0.050 | 0.045 | F、b、Z |
B | 0.045 | ||||||
Q275 | - | 0.28~0.38 | 0.50~0.80 | 0.35 | 0.050 | 0.045 | b、Z |
Rectangular tubes are divided according to the production process: hot-rolled seamless tubes, cold-drawn seamless tubes, extruded seamless tubes, and welded tubes.
Square tubes are divided by material: plain carbon steel square tubes, low alloy square tubes.
1. Common 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.
Square tubes are classified according to cross-sectional shape:
1. Simple section square tube: square square tube, rectangular square tube.
2. Square tubes with complex sections: flower-shaped square tubes, open-shaped square tubes, corrugated square tubes, and special-shaped square tubes.
Application
Urban/civil construction pipe
Machine structure pipe
Agriculture equipment pipe
Water and gas pipe
Greenhouse pipe
Scaffolding pipe
Building material tube
Furniture tube
Low pressure fluid tube
Vehicle manufacturing
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