Q235B Carbon Steel Welded Pipe - ERW Round Tube

QIDAMT · CARBON STEEL PIPE

Q235B Carbon Steel Welded Pipe – ERW Round Tube

ERW welded Q235B round pipe for structural, fencing, scaffolding and general conveyance applications.

Q235B carbon steel welded pipe is an electric-resistance-welded (ERW) round tube made from Q235B mild steel coil. It is the most cost-effective round pipe for structural and low-pressure conveyance applications.

Key Advantages

Cost Effective

Much cheaper than seamless pipe.

Wide Diameters

21.3 – 610 mm OD available.

Weldable

Easy field welding and threading.

Consistent

Straight, round and dimensionally stable.

Compoziție chimică (Q235B)

Element	C	Si	Mn	P	S
Conţinut %	≤ 0.20	≤ 0.35	0.30 – 0.70	≤ 0.045	≤ 0.045

Mechanical Properties

Tensile strength (σb): ≥ 375 MPa
Yield strength (σs): ≥ 235 MPa
Elongaţie (δ): ≥ 20 %
Hydrostatic test: 2.5 MPa (normal structural)

Standard Sizes

Parameter	Range
Outer diameter	21.3 – 610 mm (1/2″ – 24″)
Wall thickness	1.8 – 16 mm
Lungime	5.8 – 12 m (cut to length)
Suprafaţă	Negru / pictat / galvanized
Standard	GB/T 3091 / ASTM A53 / JIS G3444

Applications

Q235B welded pipe is used for structural tubing, fence posts, scaffolding, greenhouses, drainage, low-pressure water conveyance and machinery frames. For seamless pipe see our 20# seamless pipe; for galvanized pipe see galvanized round pipe.