KS D3568 Structural Tubes

Standard : SPSR400 ,490,540,590

Application

1.city & industrial water

2.irrigation & agriculture water

3.oil & gas supply

4. sprinkler

5.fire hydrant,

6.ship piping etc.

Surface :black painting ,varnish painting, anti rust oil, hot galvanized, cold galvanized, 3PE etc .

Package: hexagonal bundled or loose packing.

Weight and Dimension(KS D 3568(STK) JIS G 3466(STK)

Diameter		weight	area	Moment inertia	Section modules	Radious of Gyration
AXB	Wall thickness	Kg/m	cm	cm4	cm	cm
20x20	1.2 1.6	0.697 0.872	0.865 1.123	0.53 0.67	0.52	0.769 0.751
25x25	1.2	0867	1.105	1 03	0.824	0.965
25x25	1.6	1.12	1.432	1 27	1.02	0.942
30x30	12	1 06	1.345	1 83	1 22	1.17
30x30	1.6	1.38	1.752	2.31	1.54	1.15
40x40	1.6	1.88	2.392	5.79	2.90	1.56
40x40	2.3	2.62	3.332	7.73	3.86	1.52
50x50	1.6	2.38	3.032	11.7	4.68	1.96
	2.3	3.34	4.252	15.9	6.34	1.93
	3.2	4.50	5.727	20.4	8.16	1.89
60x60	1.6	2.88	3.672	20.7	689	2.37
	2.3	406	5.172	28.3	9.44	2.34
	3.2	5.50	7.007	369	12.3	2.30
75x75	1.6	3.64	4.632	41.3	11.0	2.99
	2.3	5.14	6.552	57.1	15.2	2.95
	3.2	701	8.927	75.5	20.1	2.91
	4.5	9.55	12.17	986	26.3	2.85
90x90	2.3	6.23	7.932	101	22.4	3.56
90x90	3.2	8.51	10.85	135	29.9	3.52
100x100	2.3	695	8.852	140	27.9	3.97
	3.2	9.52	12.13	187	37.5	3.93
	40	117	14.95	226	45.3	3.89
	4.5	13.1	16.67	249	49.9	3.87
	6.0	17.0	21.63	311	62.3	3.79
125x125	3.2	12.0	15.33	376	60.1	4.95
	4.5	16.6	21.17	506	80.9	4.89
	5.0	18.3	23.36	553	884	4.86
	6.0	21.7	27.63	641	103	4.82

rectangle

diametion		weight	area	moment of inertia		Section modulus		redious of gyration
AXB	thickness	w	a	I_X	I_Y	z_x	z_y	i_x	i_y
mm	mm	kg/m	cm²	cm⁴	cm⁴	cm³	cm³	cm	cm
30x20	1.2	0.868	1.105	1.34	0.711	0.890	0.711	1.10	0802
	1.2	0.868	1.105	1.34	0.711	0.890	0.711	1.10	0802
	16	1.124	1.4317	1.66	0.879	1.11	0.879	1.80	0784
40x20	1.2	1.053	1.3453	2.73	0.923	1.36	0.923	1 42	0.828
40x20	1.6	1.357	1.7517	3.43	1.15	1.72	1.15	1.40	0 810
50x30	1.6	1.88	2.392	7.96	3.60	3.18	2.40	1.82	1.23
50x30	2.3	2.62	3.332	10.6	4.76	4.25	3.17	1 79	1.20
60x30	1.6	2.13	2.721	12.5	4.25	4 16	2.83	2.15	1.25
	2.3	2.98	3.792	16 8	5.65	5.61	3.76	2.11	1.22
	3.2	3.99	5.082	21 4	7.08	7.15	4.72	2.05	1.18
75x45	16	2.88	3.672	284	12 9	7.56	5.75	2.78	1.88
	2.3	4.06	5.172	38.9	17.6	10 4	7.82	2.74	1.84
	3.2	5.50	7.007	508	22.8	13.5	10.1	2.69	1.80
80x40	1.6	2.88	3.672	30.7	10.5	7.68	5.26	2.89	1.69
	2.3	4.06	5.172	42.1	14.3	10.5	7.14	2.85	1.66
	3.2	5.50	7.007	54.9	18 4	13.7	9.21	2.80	1.62
100x50	1.6	3.64	4.632	61.3	21.1	12.3	8.43	3.64	2.13
	2.3	5.14	6.552	84.8	29.0	17.0	11.6	3.60	2.10
	3.2	7.01	8.927	112	380	22.5	15 2	3.55	2.06
	4.5	9.55	12.17	147	489	29.3	19.5	3.47	2.00
125x75	2.3	6.95	8.852	192	87.5	30.6	23.3	4.65	3.14
	3.2	9.52	12.13	257	117	141	31.1	4.60	3.10
	4.0	11.7	14.95	311	141	19.7	37.5	4.56	3.07
	4.5	13.1	16.67	342	155	54.8	41.2	4.53	3.04
	6.0	17 0	21.63	428	192	68.5	51.1	4.45	2.98
150x75	3.2	10 8	13.73	402	137	53.6	36.6	5.41	3.16
150x100	3.2	12 0	15.33	488	262	65.1	52.5	5.64	4.14
	4.5	16.6	21.17	658	352	87.7	704	5.58	4.08
	6.0	21 7	27.63	835	444		888	5.55	401

Mechanical Properties

Symbol of grade	Tensile test
Symbol of grade	Tensile strength N/mnftkgf/innf)	Yield strength N/mmXkgf/miif)	Elongation(No.5 test piecet%))
SPSR400 (STKR400)	Min 400 (Min. 400)	Min 245 (Min. 245)	Min 23 (Min. 23)
SPSR490	Min 490	Min. 325	Min 23
(STKR490)	(Min. 490)	(Min. 325)	(Min. 23)
SPSR540	Min, 540	Min, 390	Min, 20
SPSR590	Min. 590	Min. 440	Min. 20

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KS D3568 Structural Tubes

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