Q345B ST52 shaft Triangular Shape Carbon Steel Tube and Pipe

Application:
Shaped seamless steel tubes are widely used in various structural parts, tools and mechanical parts. Compared with round tubes, shaped tubes generally have larger moments of inertia and section modulus, and have greater resistance to bending and torsion, which can greatly reduce the structural weight and save steel.
Steel grade:
ASTM: 1020, 1026, 1045
JIS: S20C, S45C, STKM 11A, STKM 16A, STKM 17A
EN: 1.1151, 1.0503, 1.0580, 1.0308, 1.0408
DIN:ST35, ST45, ST52
BS:E235, E275, E355
Shape:Round, square, rectangular, triangle, hexagonal, oval and other special sections.
Outside Diameter range: 8mm-114mm
Tolerance of OD:+/-0.20mm
Wall Thickness range: 1mm-25mm

Tolerance of WT: +/-0.12mm
Straightness: ≤2.0mm/m
Special shaped tubes process:Steel bar→ punched→ heat treatment→ acid pickling→ cold drawn→ stress relieved→ dimension inspection→ package
Delivery condition:Cold drawn only, Normalized, Stress relieved
Surface condition: Bright, Smooth, Black

Hexagonal tube with inner hole

QUALITY CONTROL:

1. Incoming Raw Material Inspection

2. Raw Material Segregation to avoid steel grade mix-up

3. Heating and Hammering End for Cold Drawing

4. Cold Drawing and Cold Rolling, on line inspection

5. Heat Treatment, +A, +SRA, +LC, +N, Q+T

6. Straightening-Cutting to specified length-Finished Measuring Inspection

7. Machanical Testing in labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc

8. Packing and Stocking



100% of our steel tubes are dimensionally checked

100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.

100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.

Special-shaped  pipe

Special-shaped  Tube

Special-shaped carbon Steel Tube

Special-shaped carbon Steel Tube

packing 

packing

hot rolled steel pipe

cold rolled steel pipe