Black Square Steel Tube

Black Square Steel Tube is a square box of steel made from hot-rolled steel sheets. This steel has a blue-black surface, in addition to black box steel, there are also galvanized steel boxes on the market with similar specifications.

Advantages

Cost saving

Eco-friendly materials

Enduring with time

High quality

Bearing good

Policy

Construction warranty

Precision machining

Safe transport

Specifications	Thickness (mm)
(mm)	0.7	0.8	0.9	1	1.1	1.2	1.4	1.5	1.6	1.8	2	2.5	2.8	3	3.2	3.5
12×12	0.25	0.29	0.32	0.35	0.39	0.42	0.48
14×14	0.3	0.34	0.38	0.42	0.45	0.49	0.57	0.6
16×16	0.34	0.39	0.43	0.48	0.52	0.57	0.66	0.7
18×18	0.38	0.44	0.49	0.54	0.59	0.64	0.74	0.79
20×20	0.43	0.49	0.55	0.6	0.66	0.72	0.83	0.89
25×25		0.61	0.69	0.76	0.83	0.91	1.05	1.12
30×30			0.83	0.92	1	1.1	1.27	1.36	1.44	1.62	1.79	2.2
38×38				1.17	1.29	1.4	1.62	1.73	1.85	2.07	2.29
40×40				1.23	1.35	1.47	1.71	1.83	1.95	2.18	2.41	2.99
50×50						1.85	2.15	2.23	2.45	2.75	3.04	3.77	4.2	4.49
60×60						2.23	2.59	2.77	2.95	3.31	3.67	4.56	5.08	5.43
75×75							3.25	3.48	370	4.16	4.61	5.73	6.4	6.84	7.28	7.94
90×90							3.91	4.18	4.46	5.01	5.55	6.91	7.72	8.26	8.79	9.59

Other products

Galvanized Steel Square Tube

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Galvanized Steel Rectangular Tube

Galvanized Steel Rectangular Tube is a long steel tube with a rectangular cross-section. Steel with high carbon content for strength, good resistance to force.

Black Steel Rectangular Tube

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