Hollow Section, Square Tube, Rectangular Tube

ASTM A500 Grade B
ASTM A513 (1020-1026)
ASTM A36 (A36)
EN 10210:S235,S355,S235JRH,
S355J2H,S355NH EN 10219:S235,S355,S235JRH,
S275J0H, S275J2H, S355J0H, S355J2H

Rectangular/ Square hollow section manufacturing process
Rectangular/ Square hollow section are formed from coils and then ran through a series of dies. They are are welded from the inside to form their shape.

Process of hollow section
Cold Formed Square Hollow Section
Cold Formed Rectangular Hollow Section
Hot Finish Square Hollow Section
Hot Finish Rectangular Hollow Section

Types of hollow section
Carbon Hollow Section

A500 Gr-B	Standard specification published by the ASTM for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes.
A513	Offers high weldability and is used frequently in structural applications in bridges and buildings as well as in both the automotive and appliance industry.

Carbon Steel Structural Hollow Sections Packaging and Advantages
Types of Packaging:
Bundles (hexagonal)
Wooden Boxes
Crates (steel/wooden)
Special crates for Structural Hollow Sections with each radius separated
Packaging for Carbon Steel Seamless Pipe as per customer’s requirements

Advantages :
High Strength
Resistant High Mechanical Stresses
Resistant to High Pressure
Resistant to High Temperature
Good Formality
Reusable

Stainless Hollow Section

304	Offers resistance to corrosion, has good formability and can be readily welded by all methods. One of the most commonly used grades across the industry.
304L	Extra low carbon avoids harmful carbide precipitation due to welding. Same corrosion resistance as 304 with lower mechanical properties.
316	Better pitting and corrosion resistance than 304, as well as higher strength at elevated temperatures. 316 can be used for valves, marine equipment, pumps, and chemical equipment.
316L	Extra low carbon avoids harmful carbide precipitation due to welding. Same excellent corrosion resistance as 316. It exhibits the same high strength, toughness and workability as 304 alloys.

Square Tube ( rectangular tube below)
Width Thickness
16*16mm ~ 1000*1000mm 0.4mm ~ 50mm

Sizes by MM (diameter)	Thickness
mm	mm
16mm×16mm	0.4mm～1.5mm
18mm×18mm	0.4mm～1.5mm
20mm×20mm	0.4mm～3mm
22mm×22mm	0.4mm～3mm
25mm×25mm	0.6mm～3mm
30mm×30mm	0.6mm～4mm
32mm×32mm	0.6mm～4mm
34mm×34mm	1mm～2mm
35mm×35mm	1mm～4mm
38mm×38mm	1mm～4mm
40mm×40mm	1mm～4.5mm
44mm×44mm	1mm～4.5mm
45mm×45mm	1mm～5mm
50mm×50mm	1mm～5mm
52mm×52mm	1mm～5mm
60mm×60mm	1mm～5mm
70mm×70mm	2mm～6mm
75mm×75mm	2mm～6mm
76mm×76mm	2mm～6mm
80mm×80mm	2mm～8mm
85mm×85mm	2mm～8mm
90mm×90mm	2mm～8mm
95mm×95mm	2mm～8mm
100mm×100mm	2mm～8mm
120mm×120mm	4mm～8mm
125mm×125mm	4mm～8mm
130mm×130mm	4mm～8mm
140mm×140mm	6mm～10mm
150mm×150mm	6mm～10mm
160mm×160mm	6mm～10mm
180mm×180mm	6mm～12mm
200mm×200mm	6mm～30mm
220mm×220mm	6mm～30mm
250mm×250mm	6mm～30mm
270mm×270mm	6mm～30mm
280mm×280mm	6mm～30mm
300mm×300mm	8mm～30mm
320mm×320mm	8mm～30mm
350mm×350mm	8mm～30mm
380mm×380mm	8mm～30mm
400mm×400mm	8mm～30mm
420mm×420mm	10mm～30mm
450mm×450mm	10mm～30mm
480mm×480mm	10mm～30mm
500mm×500mm	10mm～30mm
550mm×550mm	10mm～40mm
600mm×600mm	10mm～40mm
700mm×700mm	10mm～40mm
800mm×800mm	10mm～50mm
900mm×900mm	10mm～50mm
1000mm×1000mm	10mm～50mm

Width Thickness
40*20mm ~ 300*200mm 1.6mm ~ 16mm

SIZE mm	WEIGHT kg/m	EST. LBS. PER FT.	SIZE mm	WEIGHT kg/m
SIZE mm	WEIGHT kg/m	EST. LBS. PER FT.	SIZE mm	WEIGHT kg/m	EST. LBS. PER FT.
40 x 20 x 1.60	1.380	0.93	150 x 100 x 6.30	22.400	15.08
40 x 20 x 2.60	2.100	1.41	150 x 100 x 8.00	27.700	18.64
50 x 30 x 1.60	1.880	1.27	150 x 100 x 10.00	35.714	24.04
50 x 30 x 2.60	2.920	1.97	160 x 80 x 3.20	11.500	7.74
50 x 30 x 2.90	3.320	2.23	160 x 80 x 4.00	14.300	9.62
50 x 30 x 3.20	3.490	2.35	160 x 80 x 5.00	17.400	11.71
50 x 30 x 4.00	4.410	2.97	160 x 80 x 6.30	21.400	14.40
60 x 40 x 2.60	3.730	2.51	160 x 80 x 8.00	26.400	17.77
60 x 40 x 2.90	4.230	2.85	160 x 80 x 10.00	32.545	21.87
60 x 40 x 3.20	4.500	3.03	160 x 90 x 4.50	16.600	11.17
60 x 40 x 4.00	5.670	3.82	160 x 90 x 5.60	20.400	13.73
70 x 40 x 2.90	4.690	3.16	160 x 90 x 7.10	25.300	17.03
70 x 40 x 4.00	6.300	4.24	160 x 90 x 8.80	30.500	20.53
80 x 40 x 2.60	4.550	3.06	160 x 90 x 10.00	34.100	22.95
80 x 40 x 2.90	5.140	3.46	180 x 100 x 4.00	16.800	11.31
80 x 40 x 3.20	5.500	3.70	180 x 100 x 5.00	20.500	13.80
80 x 40 x 4.00	6.930	4.66	180 x 100 x 5.60	23.000	15.48
80 x 40 x 5.00	8.470	5.70	180 x 100 x 6.30	25.400	17.09
80 x 40 x 6.30	10.400	7.00	180 x 100 x 7.10	28.600	19.25
90 x 50 x 2.60	5.370	3.61	180 x 100 x 8.80	34.700	23.35
90 x 50 x 3.20	6.640	4.47	180 x 100 x 10.00	38.800	26.11
90 x 50 x 4.00	8.180	5.51	180 x 100 x 12.50	46.900	31.56
90 x 50 x 5.00	10.000	6.73	200 x 100 x 4.00	18.000	12.11
90 x 50 x 6.30	12.300	8.28	200 x 100 x 5.00	22.100	14.20
90 x 50 x 7.10	13.700	9.22	200 x 100 x 6.30	27.400	18.44
100 x 50 x 3.60	7.980	5.37	200 x 100 x 8.00	34.000	22.88
100 x 50 x 4.50	9.830	6.62	200 x 100 x 10.00	40.600	27.32
100 x 50 x 5.60	12.000	8.08	200 x 120 x 4.00	19.300	12.99
100 x 50 x 7.10	14.800	9.96	200 x 120 x 5.00	23.700	15.95
100 x 50 x 8.00	16.400	11.04	200 x 120 x 6.30	29.600	19.92
100 x 60 x 3.20	7.510	5.05	200 x 120 x 8.00	36.500	24.56
100 x 60 x 3.60	8.550	5.75	200 x 120 x 8.80	36.900	24.83
100 x 60 x 4.50	10.500	7.07	200 x 120 x 10.00	45.100	31.62
100 x 60 x 5.60	12.900	8.68	200 x 120 x 12.50	54.700	38.87
100 x 60 x 6.30	13.500	9.09	200 x 120 x 14.20	60.900	43.64
100 x 60 x 7.10	15.900	10.70	220 x 80 x 6.00	26.816	18.02
100 x 60 x 8.80	19.200	12.92	220 x 120 x 6.30	31.600	21.27
100 x 80 x 6.3	16.370	11.02	220 x 120 x 8.00	39.400	26.52
110 x 60 x 3.60	9.050	6.09	220 x 120 x 10.00	46.200	31.09
110 x 60 x 4.50	11.100	7.47	220 x 120 x 12.50	58.700	39.51
110 x 60 x 5.60	13.600	9.15	220 x 120 x 14.20	65.400	44.01
110 x 60 x 7.10	16.800	11.31	250 x 150 x 5.00	29.900	20.12
110 x 60 x 8.80	20.100	13.53	250 x 150 x 6.30	37.300	25.10
110 x 70 x 3.20	8.510	5.73	250 x 150 x 8.00	46.500	31.29
110 x 70 x 4.00	10.800	7.27	250 x 150 x 10.00	56.300	37.89
110 x 70 x 5.00	12.700	8.55	250 x 150 x 12.50	68.300	45.97
110 x 70 x 6.30	15.500	10.43	260 x 140 x 6.30	37.500	25.23
120 x 60 x 3.20	8.510	5.73	260 x 140 x 8.00	46.900	31.56
120 x 60 x 4.00	10.600	7.13	260 x 140 x 10.00	57.600	38.76
120 x 60 x 5.00	13.000	8.75	260 x 140 x 12.50	70.400	47.38
120 x 60 x 6.30	16.100	10.84	260 x 140 x 14.20	78.800	53.03
120 x 60 x 7.10	17.900	12.05	260 x 180 x 6.30	41.500	27.93
120 x 60 x 8.80	21.500	14.47	260 x 180 x 8.00	52.000	35.00
120 x 80 x 3.20	12.100	8.14	260 x 180 x 10.00	63.900	43.00
120 x 80 x 6.30	17.500	11.78	260 x 180 x 12.50	78.300	52.70
140 x 70 x 4.00	12.500	8.41	260 x 180 x 14.20	87.700	59.02
140 x 70 x 5.00	15.400	10.36	300 x 100 x 5.00	30.268	20.34
140 x 70 x 6.30	19.000	12.79	300 x 100 x 8.00	47.679	32.04
140 x 70 x 7.10	21.200	14.27	300 x 100 x 10.00	58.979	39.63
140 x 70 x 8.80	25.600	17.23	300 x 200 x 5.00	37.800	25.44
140 x 80 x 3.20	10.500	7.07	300 x 200 x 6.30	47.100	31.70
140 x 80 x 4.00	13.100	8.82	300 x 200 x 8.00	59.100	39.77
140 x 80 x 5.00	16.200	10.90	300 x 200 x 10.00	72.000	48.46
140 x 80 x 6.30	20.000	13.46	300 x 200 x 12.00	88.000	59.22
140 x 80 x 8.00	24.800	16.69
140 x 80 x 10.00	30.200	20.32
150 x 100 x 3.20	12.000	8.08
150 x 100 x 4.00	14.900	10.03