Q235 galvanized steel pipe is manufactured from low-carbon Q235 steel, offering excellent plasticity, weldability, and structural stability. Its tensile strength ranges from 370 to 500 MPa, with a minimum yield strength of 235 MPa, making it suitable for a wide range of load-bearing applications.
The galvanization process, either hot-dip or electro-galvanizing, adds a protective zinc coating that prevents rust and extends the service life of the pipe, even in harsh outdoor or humid environments. These pipes are lightweight, easy to install, and retain their stability after welding, enabling customized fabrication for diverse projects.
Key Features
Corrosion-Resistant: Zinc coating protects against rust and environmental exposure.
High Strength: Strong load-bearing capacity suitable for heavy structural applications.
Easy to Weld & Fabricate: Can be cut, drilled, bent, or welded without compromising integrity.
Cost-Effective: Long-lasting durability at a competitive price.
Low Maintenance: Extended protection reduces upkeep and replacement costs.
Applications
Q235 galvanized steel pipes are widely used across industries, including:
Construction: Building frames, scaffolding, support beams, roofing structures.
Oil & Gas: Pipeline systems, drilling rigs, offshore platforms, storage tanks.
Automotive: Chassis components, exhaust systems, frame reinforcements.
Electrical Utilities: Power poles, substation structures, electrical conduit systems, cable supports.
Water Management: Water pipelines, sewage systems, irrigation networks, water treatment plant structures.
Telecommunications: Antenna towers, communication poles, relay towers.
Other Structural Uses: Greenhouses, furniture frames, vehicle manufacturing, mechanical components.
Specifications
| Parameter | Details |
|---|---|
| Standard | GB/T 700, GB/T 3091, GB/T 13912, ASTM A53, EN 10240, ISO 1461, GB/T 21835, GB/T 13793, ASTM A500, EN 10219, EN 10210, JIS G3444, JIS G3452, BS EN 10217, AS 1074 |
| Grade | Q235A, Q235B, Q235C, Q235D |
| Outer Diameter (Pipe) | 21.3 – 219 mm (or as requested) |
| Outer Diameter (Tube) | 10 – 114 mm (or as requested) |
| Wall Thickness (Pipe) | 2 – 12 mm (or as requested) |
| Wall Thickness (Tube) | 0.5 – 6 mm (or as requested) |
| Length | Pipe: 6 m / 12 m standard or customized; Tube: 6 m standard or customized |
| Section Shape | Round, square, rectangular, oval, etc. |
| Galvanization | Hot-Dip, Electro-Galvanized, Pre-Galvanized |
| Zinc Coating | Z30–600 g/m² |
| End Types | Plain, Beveled, Threaded, Grooved, or as requested |
| Surface Treatment | Skin pass, sand-blasted, pre-painted, galvanized, oiled, passivated, 3LPE/FBE coating, or as requested |
| Certification | ISO 9001, CE |
| Packaging | Standard seaworthy packing, or customized |
Material Specifications
Chemical Composition (GB/T 700-2006)
| Steel Grade | C % | Si % | Mn % | P % | S % |
|---|---|---|---|---|---|
| Q235A | 0.22 | 0.35 | 1.4 | 0.045 | 0.05 |
| Q235B | 0.20 | 0.35 | 1.4 | 0.045 | 0.045 |
| Q235C | 0.17 | 0.35 | 1.4 | 0.04 | 0.04 |
| Q235D | 0.17 | 0.35 | 1.4 | 0.035 | 0.035 |
Mechanical Properties
| Thickness (mm) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Impact KV2 (J) |
|---|---|---|---|---|
| ≤16 | 370–500 | ≥235 | ≥26 | ≥27 |
| >16–40 | 370–500 | ≥225 | – | – |
| >40–60 | 370–500 | ≥215 | ≥25 | – |
| >60–100 | 370–500 | ≥215 | ≥24 | – |
| >100–150 | 370–500 | ≥195 | – | – |
| >150–200 | 370–500 | ≥185 | – | – |