Electric Resistance Welded Tube (ERW)

Condition	Yield	Tensile	Elongation
N/mm2	Re min N/mm2	Re min % min
KM as welded+CR2	220	310	23

Wall Thickness

The tolerance including eccentricity but excluding the weld, shall be:

a) thickness less 1.5mm: +/- 0.15mm

b) thickness 1.5mm and over: +/- 10% or +/- 0.35mm whichever is the smaller

Concavity/Convexity

The maximum concave or convex deflection of a flat side of a square or rectangular section of tube shall not exceed 0.5% of the nominal length of that side.

Weld Height

The maximum height of the internal weld shall not exceed 60% of the specified thickness.

Straightness

Tubes shall not depart from straightness by more than 1.5 in 1000.

C	Si	Mn	P	S
max %	max %	max %	max %	max %
0.14	0.35	0.70	0.025	0.025

Sculptured tube has an embossed outside diameter making it suitable for practical and decorative applications. The embossed surface also increases its strength by up to 50%. Sculptured tube is produced in a series of standard patterns.

Typical Applications

Transport hand rail systems

Furniture

Ladder rungs

Shop fittings

Exhibition stands

Grip rails

Various sections are available ex stock in a wide range of gauges and sizes.

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