Square Cold-Drawn Precision Steel Pipe

Introduction

Huagang's Square Cold-Drawn Precision Steel Pipe manufacturing process encompasses five core steps: 1. Billet tube (annealing), 2. Inspection (pickling and phosphating), 3. Pointing, 4. Drawing (inspection), and 5. Cutting and packaging. The entire process strictly adheres to JIS3445 and EN10305 standards, creating a technical barrier that is difficult for small and medium-sized enterprises to overcome. This comprehensive quality control system ensures the product's high strength, high precision, and high finish, maintaining an irreplaceable competitive advantage in high-end manufacturing and providing high-performance precision steel tube solutions for various industries.

Product Name	Square tube (precision cold drawn tube)
Graphic ID	Type	Size（D*D）	Thickness Range	Size Tolerance
HGZF001	Square tube	80*80	1-5	±0.1
HGZF002	Square tube	75*75	1-5	±0.1
HGZF003	Square tube	74*74	1-5	±0.1
HGZF004	Square tube	70*70	1-5	±0.1
HGZF005	Square tube	68*68	1-5	±0.1
HGZF006	Square tube	65*65	1-5	±0.1
HGZF007	Square tube	64*64	1-5	±0.1
HGZF008	Square tube	60*60	1-5	±0.1
HGZF009	Square tube	41.1*41.1	1-5	±0.1
HGZF010	Square tube	38.1*38.1	1-5	±0.1
HGZF011	Square tube	31.75*31.75	1-5	±0.1
HGZF012	Square tube	30*30	1-5	±0.1
HGZF013	Square tube	28.5*28.5	1-5	±0.1
HGZF014	Square tube	27.5*27.5	1-5	±0.1
HGZF015	Square tube	25.5*25.5	1-5	±0.1
HGZF016	Square tube	22*22	1-5	±0.1
HGZF017	Square tube	16*16	1-5	±0.1
HGZF018	Square tube	13*13	1-5	±0.1

Core Advantages

1. It is precisely by precisely controlling the temperature curve to eliminate the internal stress of the material that the tube blank annealing process endows the square cold-drawn precision steel tube with a uniform metallographic structure - this key process directly determines the matrix performance of the product and becomes a solid foundation for ensuring high strength and stability.

2. High-standard inspection methods are employed during the inspection and pickling and phosphating processes to ensure the billet tube is defect-free. The pickling and phosphating treatment creates a uniform surface conversion layer, which not only provides the necessary lubrication for drawing but also serves as the primary guarantee for the product's high corrosion resistance.

3. The tipping process requires extremely high technical precision. The geometric shape and dimensional accuracy of the tip directly impact the stability of the drawing process. The process quality of this step determines whether the subsequent drawing can achieve uniform deformation and is a critical pre-process for ensuring close product tolerances.

4. Drawing, as the core forming process, achieves improved dimensional accuracy and mechanical properties through multiple precise diameter reduction passes. In-line inspection ensures that each process meets standard requirements, a process that directly contributes to the product's "smooth operation" characteristics and high surface finish.

5. High-precision cut-to-length cutting is used during the cutting and packaging process to ensure product length tolerances within ±1mm. Professional rust-proof packaging ensures that the product remains in optimal condition during transportation and storage.

6. The tolerance consistency of any three points within our square cold-drawn precision steel tube is ±0.05.