508 CHS — Sizes, Dimensions & Properties

7 sizes in the 508 serial size group. All dimensions in mm, section properties in cm units.

Designation	Mass (kg/m)	D (mm)	t (mm)	A (cm2)	I (cm4)	Z (cm3)	S (cm3)	r (cm)
508.0x6.0	74.3	508	6	94.6	29,800	1,170	1,510	17.7
508.0x8.0	98.6	508	8	126	39,300	1,550	2,000	17.7
508.0x10.0	123	508	10	156	48,500	1,910	2,480	17.6
508.0x12.0	147	508	12	187	57,500	2,270	2,950	17.5
508.0x12.5	153	508	12.5	195	59,800	2,350	3,070	17.5
508.0x14.2	173	508	14.2	220	67,200	2,650	3,460	17.5
508.0x16.0	194	508	16	247	74,900	2,950	3,870	17.4

508.0x6.0 CHS

Designation: 508.0x6.0
Outside Diameter (D): 508 mm
Wall Thickness (t): 6 mm
Mass per Metre: 74.3 kg/m
Cross-Sectional Area: 94.6 cm2
Second Moment of Area I: 29,800 cm4
Elastic Modulus Z: 1,170 cm3
Plastic Modulus S: 1,510 cm3
Radius of Gyration r: 17.7 cm
Torsional Constant (It): 59,600 cm4
Surface Area per Metre: 1.6 m2/m
Surface Area per Tonne: 21.5 m2/t

508.0x8.0 CHS

Designation: 508.0x8.0
Outside Diameter (D): 508 mm
Wall Thickness (t): 8 mm
Mass per Metre: 98.6 kg/m
Cross-Sectional Area: 126 cm2
Second Moment of Area I: 39,300 cm4
Elastic Modulus Z: 1,550 cm3
Plastic Modulus S: 2,000 cm3
Radius of Gyration r: 17.7 cm
Torsional Constant (It): 78,600 cm4
Surface Area per Metre: 1.6 m2/m
Surface Area per Tonne: 16.2 m2/t

508.0x10.0 CHS

Designation: 508.0x10.0
Outside Diameter (D): 508 mm
Wall Thickness (t): 10 mm
Mass per Metre: 123 kg/m
Cross-Sectional Area: 156 cm2
Second Moment of Area I: 48,500 cm4
Elastic Modulus Z: 1,910 cm3
Plastic Modulus S: 2,480 cm3
Radius of Gyration r: 17.6 cm
Torsional Constant (It): 97,000 cm4
Surface Area per Metre: 1.6 m2/m
Surface Area per Tonne: 13 m2/t

508.0x12.0 CHS

Designation: 508.0x12.0
Outside Diameter (D): 508 mm
Wall Thickness (t): 12 mm
Mass per Metre: 147 kg/m
Cross-Sectional Area: 187 cm2
Second Moment of Area I: 57,500 cm4
Elastic Modulus Z: 2,270 cm3
Plastic Modulus S: 2,950 cm3
Radius of Gyration r: 17.5 cm
Torsional Constant (It): 115,000 cm4
Surface Area per Metre: 1.6 m2/m
Surface Area per Tonne: 10.9 m2/t

508.0x12.5 CHS

Designation: 508.0x12.5
Outside Diameter (D): 508 mm
Wall Thickness (t): 12.5 mm
Mass per Metre: 153 kg/m
Cross-Sectional Area: 195 cm2
Second Moment of Area I: 59,800 cm4
Elastic Modulus Z: 2,350 cm3
Plastic Modulus S: 3,070 cm3
Radius of Gyration r: 17.5 cm
Torsional Constant (It): 120,000 cm4
Surface Area per Metre: 1.6 m2/m
Surface Area per Tonne: 10.4 m2/t

508.0x14.2 CHS

Designation: 508.0x14.2
Outside Diameter (D): 508 mm
Wall Thickness (t): 14.2 mm
Mass per Metre: 173 kg/m
Cross-Sectional Area: 220 cm2
Second Moment of Area I: 67,200 cm4
Elastic Modulus Z: 2,650 cm3
Plastic Modulus S: 3,460 cm3
Radius of Gyration r: 17.5 cm
Torsional Constant (It): 134,000 cm4
Surface Area per Metre: 1.6 m2/m
Surface Area per Tonne: 9.23 m2/t

508.0x16.0 CHS

Designation: 508.0x16.0
Outside Diameter (D): 508 mm
Wall Thickness (t): 16 mm
Mass per Metre: 194 kg/m
Cross-Sectional Area: 247 cm2
Second Moment of Area I: 74,900 cm4
Elastic Modulus Z: 2,950 cm3
Plastic Modulus S: 3,870 cm3
Radius of Gyration r: 17.4 cm
Torsional Constant (It): 150,000 cm4
Surface Area per Metre: 1.6 m2/m
Surface Area per Tonne: 8.22 m2/t

508 CHS — Overview

The 508 serial size group contains 7 sections, ranging from 194 kg/m to 74.3 kg/m. All sections in this group share the same nominal depth and width but differ in web and flange thickness, which affects the weight and structural capacity.

Section properties are sourced from the Tata Steel Blue Book / SCI P363. For structural design to BS EN 1993-1-1 (Eurocode 3), use these properties with the appropriate partial factors from the UK National Annex.

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Section properties from Tata Steel Blue Book / SCI P363 / BS 4-1:2005.