Pre-Galvanized Square & Rectangular Steel Tube

QIDAMT · GALVANIZED TUBE

Pre-Galvanized Square & Rectangular Steel Tube – Q235B

Q235B square and rectangular tube with pre-galvanized coating for frames, 랙, solar supports and fencing.

Pre-galvanized square and rectangular steel tube is formed from galvanized strip and welded into a closed section, then cut to length. The zinc coating covers the whole surface including corners, and the clean, bright finish makes it ready for use or painting without further treatment — ideal for racks, frames and structural sections.

Key Advantages

All-Round Coating

Zinc covers surface and corners uniformly.

Ready to Use

Bright finish, no pre-treatment required.

Square Corners

Clean edges for neat joints and frames.

Weldable

Good weldability with local touch-up.

화학적 구성 요소 (Q235B Base)

요소	기음	망	그리고	피	에스	철
콘텐츠 %	0.12 – 0.20	0.30 – 0.70	≤ 0.30	≤ 0.045	≤ 0.045	균형

기계적 성질

항복 강도: ≥ 235 MPa
인장강도: 370 – 500 MPa
연장 (δ): ≥ 26 %
아연 코팅: 20 – 40 μm (Z60 – Z120)
밀도: 7.85 g/cm3

Standard Sizes

Parameter	Range
Square section	20×20 – 200×200 mm
Rectangular section	20×30 – 150×200 mm
Wall thickness	0.8 – 8.0 mm
길이	6 m standard, cut to order
기준	GB/T 6728 / 안에 10219 / ASTM A500 / JIS G3466

응용

Pre-galvanized square and rectangular tube is used for storage racks and display frames, solar panel mounting structures, greenhouse frames, guardrail posts and fencing, furniture frames, garage and gate structures, tent and awning frames, and light structural sections. For round profiles see our hot-dip galvanized round tube.