CHS 203x25 GOST · Weight & Dimensions

GOST, cold-formed sections · Circular Hollow Section

Circular Hollow Sections (CHS) are round tubular profiles with the most efficient cross-section for compression. Used for columns, trusses, and architectural structures.

Also known as: Caño estructural redondo (Argentina)

The CHS 203x25 steel profile weighs 109.7 kg/m (73.75 lb/ft). Cross-sectional area: 13,980.087 mm². Moment of inertia Ix = 5,646.033 cm⁴, Iy = 5,646.033 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	25 mm	0.98 in
Diameter (d)	203 mm	7.99 in
Weight	109.7 kg/m	73.75 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	13,980.09 mm²	21.669 in²
Moment of inertia (Ix)	5,646.03 cm⁴	135.65 in⁴
Moment of inertia (Iy)	5,646.03 cm⁴	135.65 in⁴
Elastic section modulus (Sx)	556.26 cm³	33.945 in³
Elastic section modulus (Sy)	556.26 cm³	33.945 in³
Plastic section modulus (Zx)	797.31 cm³	48.655 in³
Plastic section modulus (Zy)	797.31 cm³	48.655 in³
Radius of gyration (rx)	6.36 cm	2.502 in
Radius of gyration (ry)	6.36 cm	2.502 in