Properties - Hot Finished Circular Hollow Sections

Welcome to our Hot Finished Circular Hollow Section properties page! Here you'll find properties for all UK Hot Finished Circular Hollow Section steel sections described by the Steelwork Design Guide to BS5950-1:2000, Volume 1, Section Properties, Member Capacities, 7th Edition (also known as The Blue Book). Sort the table below according to any property and select a CAD file to download using the reference links in the left-most column.

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Section Reference	Ratio for Local Buckling	Second Moment of Area	Radius of Gyration	Elastic Modulus	Plastic Modulus	Torsional Constants		Surface Area
								Per Metre	Per Tonne
	D/t	I cm⁴	r cm	Z cm³	S cm³	J cm⁴	C cm³	m²	m²
26.9x3.2	8.41	1.7	0.846	1.27	1.81	3.41	2.53	0.085	45.2
33.7x2.6	13	3.09	1.1	1.84	2.52	6.19	3.67	0.106	53.1
33.7x3.2	10.5	3.6	1.08	2.14	2.99	7.21	4.28	0.106	44
33.7x4.0	8.43	4.19	1.06	2.49	3.55	8.38	4.97	0.106	36.1
42.4x2.6	16.3	6.46	1.41	3.05	4.12	12.9	6.1	0.133	52.2
42.4x3.2	13.3	7.62	1.39	3.59	4.93	15.2	7.19	0.133	43.1
42.4x4.0	10.6	8.99	1.36	4.24	5.92	18	8.48	0.133	35.2
42.4x5.0	8.48	10.5	1.33	4.93	7.04	20.9	9.86	0.133	28.9
48.3x3.2	15.1	11.6	1.6	4.8	6.52	23.2	9.59	0.152	42.6
48.3x4.0	12.1	13.8	1.57	5.7	7.87	27.5	11.4	0.152	34.7
48.3x5.0	9.66	16.2	1.54	6.69	9.42	32.3	13.4	0.152	28.4
60.3x3.2	18.8	23.5	2.02	7.78	10.4	46.9	15.6	0.189	42
60.3x4.0	15.1	28.2	2	9.34	12.7	56.3	18.7	0.189	34.1
60.3x5.0	12.1	33.5	1.96	11.1	15.3	67	22.2	0.189	27.8
76.1x2.9	26.2	44.7	2.59	11.8	15.5	89.5	23.5	0.239	45.7
76.1x3.2	23.8	48.8	2.58	12.8	17	97.6	25.6	0.239	41.6
76.1x4.0	19	59.1	2.55	15.5	20.8	118	31	0.239	33.6
76.1x5.0	15.2	70.9	2.52	18.6	25.3	142	37.3	0.239	27.3
88.9x3.2	27.8	79.2	3.03	17.8	23.5	158	35.6	0.279	41.3
88.9x4.0	22.2	96.3	3	21.7	28.9	193	43.3	0.279	33.3
88.9x5.0	17.8	116	2.97	26.2	35.2	233	52.4	0.279	27
88.9x6.3	14.1	140	2.93	31.5	43.1	280	63.1	0.279	21.8
114.3x3.2	35.7	172	3.93	30.2	39.5	345	60.4	0.359	41
114.3x3.6	31.8	192	3.92	33.6	44.1	384	67.2	0.359	36.5
114.3x4.0	28.6	211	3.9	36.9	48.7	422	73.9	0.359	33
114.3x5.0	22.9	257	3.87	45	59.8	514	89.9	0.359	26.6
114.3x6.3	18.1	313	3.82	54.7	73.6	625	109	0.359	21.4
139.7x5.0	27.9	481	4.77	68.8	90.8	961	138	0.439	26.4
139.7x6.3	22.2	589	4.72	84.3	112	1177	169	0.439	21.2
139.7x8.0	17.5	720	4.66	103	139	1441	206	0.439	16.9
139.7x10.0	14	862	4.6	123	169	1724	247	0.439	13.7
168.3x5.0	33.7	856	5.78	102	133	1710	203	0.529	26.3
168.3x6.3	26.7	1050	5.73	125	165	2110	250	0.529	21
168.3x8.0	21	1300	5.67	154	206	2600	308	0.529	16.7
168.3x10.0	16.8	1560	5.61	186	251	3130	372	0.529	13.5
168.3x12.5	13.5	1870	5.53	222	304	3740	444	0.529	11
193.7x5.0	38.7	1320	6.67	136	178	2640	273	0.609	26.2
193.7x6.3	30.7	1630	6.63	168	221	3260	337	0.609	20.9
193.7x8.0	24.2	2020	6.57	208	276	4030	416	0.609	16.6
193.7x10.0	19.4	2440	6.5	252	338	4880	504	0.609	13.4
193.7x12.5	15.5	2930	6.42	303	411	5870	606	0.609	10.9
219.1x5.0	43.8	1930	7.57	176	229	3860	352	0.688	26.1
219.1x6.3	34.8	2390	7.53	218	285	4770	436	0.688	20.8
219.1x8.0	27.4	2960	7.47	270	357	5920	540	0.688	16.5
219.1x10.0	21.9	3600	7.4	328	438	7200	657	0.688	13.3
219.1x12.5	17.5	4350	7.32	397	534	8690	793	0.688	10.8
219.1x14.2	15.4	4820	7.26	440	597	9640	880	0.688	9.59
219.1x16.0	13.7	5300	7.2	483	661	10600	967	0.688	8.59
244.5x8.0	30.6	4160	8.37	340	448	8320	681	0.768	16.5
244.5x10.0	24.5	5070	8.3	415	550	10100	830	0.768	13.3
244.5x12.5	19.6	6150	8.21	503	673	12300	1010	0.768	10.7
244.5x14.2	17.2	6840	8.16	559	754	13700	1120	0.768	9.52
244.5x16.0	15.3	7530	8.1	616	837	15100	1230	0.768	8.52
273.0x6.3	43.3	4700	9.43	344	448	9390	688	0.858	20.7
273.0x8.0	34.1	5850	9.37	429	562	11700	857	0.858	16.4
273.0x10.0	27.3	7150	9.31	524	692	14300	1050	0.858	13.2
273.0x12.5	21.8	8700	9.22	637	849	17400	1270	0.858	10.7
273.0x14.2	19.2	9700	9.16	710	952	19400	1420	0.858	9.46
273.0x16.0	17.1	10700	9.1	784	1060	21400	1570	0.858	8.46
323.9x6.3	51.4	7930	11.2	490	636	15900	979	1.02	20.6
323.9x8.0	40.5	9910	11.2	612	799	19800	1220	1.02	16.3
323.9x10.0	32.4	12200	11.1	751	986	24300	1500	1.02	13.1
323.9x12.5	25.9	14800	11	917	1210	29700	1830	1.02	10.6
323.9x14.2	22.8	16600	11	1030	1360	33200	2050	1.02	9.38
323.9x16.0	20.2	18400	10.9	1140	1520	36800	2270	1.02	8.38
355.6x14.2	25	22200	12.1	1250	1660	44500	2500	1.12	9.34
355.6x16.0	22.2	24700	12	1390	1850	49300	2770	1.12	8.34
406.4x6.3	64.5	15800	14.1	780	1010	31700	1560	1.28	20.5
406.4x8.0	50.8	19900	14.1	978	1270	39700	1960	1.28	16.2
406.4x10.0	40.6	24500	14	1210	1570	49000	2410	1.28	13.1
406.4x12.5	32.5	30000	13.9	1480	1940	60100	2960	1.28	10.5
406.4x14.2	28.6	33700	13.9	1660	2190	67400	3320	1.28	9.3
406.4x16.0	25.4	37400	13.8	1840	2440	74900	3690	1.28	8.29
457.0x8.0	57.1	28400	15.9	1250	1610	56900	2490	1.44	16.2
457.0x10.0	45.7	35100	15.8	1540	2000	70200	3070	1.44	13
457.0x12.5	36.6	43100	15.7	1890	2470	86300	3780	1.44	10.5
457.0x14.2	32.2	48500	15.7	2120	2790	96900	4240	1.44	9.26
457.0x16.0	28.6	54000	15.6	2360	3110	108000	4720	1.44	8.25
508.0x10.0	50.8	48500	17.6	1910	2480	97000	3820	1.6	13
508.0x12.5	40.6	59800	17.5	2350	3070	120000	4710	1.6	10.4
508.0x14.2	35.8	67200	17.5	2650	3460	134000	5290	1.6	9.23
508.0x16.0	31.8	74900	17.4	2950	3870	150000	5900	1.6	8.22