Mild Carbon Steel Q235Black welded steel pipe
The main materials are: A36, A333, A355, A537, A572, S235JR, S275JR, SS400, Q235, 4140, 4130, 4340, 1018, 1025, 1045, En8 and En9, etc.
- Email：admin@zhongtangsteel.cn
- WhatsApp：+86 15864006163
Description
It can produce hot-rolled carbon steel plates and cold-rolled carbon steel plates. There are various types of carbon structural steel plates, easy-to-machine carbon steel plates, boiler steel plates, carbon shipbuilding steel plates, etc.
| Place of Origin | Shandong, China |
| Alloy Or Not | Non-Alloy |
| Technique | ERW |
| Grade | Q195 Q235 Q345 |
| Delivery Time | 15-21 days |
| Application | Fluid Pipe, Structure Pipe |
| Special Pipe | gi pipe |
| Thickness | 0.5 – 12 mm |
| Length | 12M, 6m, 6.4M |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Secondary Or Not | Non-secondary |
| Surface | Galvanized Coated |
| Material | Q235 Q195 |
| Ends | 1.Plain End2. Beveled3.Threaded.4 Screwed |
| Usage | Construction Structure |
| Length | 5.8-12m |
| Shape | Round Shape |
| free sample | yes |
| MOQ | 5 Tons |
What is Q235 Black Welded Steel Pipe?
Q235 black welded steel pipe is a mild carbon steel pipe manufactured by hot-rolled or cold-rolled steel strip through a forming and welding process. The “black” finish refers to the uncoated, dark-colored surface that results from the manufacturing process, which lacks any galvanized or anti-rust coating.
Key Features:
Material: Q235 mild carbon steel (equivalent to ASTM A36, S235JR, SS400)
Process: Electric resistance welded (ERW) or longitudinal welded
Surface: Black / uncoated (mill scale finish)
Weldability: Excellent, suitable for various welding processes
Formability: Good, easy to cut, bend, and thread
Cost-Effective: Lower cost compared to galvanized or seamless pipes
Equivalent Grades:
| Standard | Grade |
|---|---|
| China GB/T | Q235 (Q235A, Q235B) |
| ASTM | A53 Grade B / A36 |
| EN | S235JR (1.0038) |
| JIS | SS400 |
| DIN | St37-2 |
