Stainless Rectangular Tube Supplier Turkey

What is Stainless rectangular tube?

Stainless rectangular tube is roll-formed and TIG or HF welded from 304 or 316 strip — the strip is shaped into a round, welded, then re-shaped into the rectangle so that the corners come out with a small, even radius (about 1–1.5 × t) and the faces flat; the weld sits in the middle of one long face and is ground flush before polishing. Sizes run from 20 × 10 mm to 150 × 50 mm (some mills to 200 × 100) in 1–3 mm walls, with the ratio 2:1 dominating: 40 × 20, 50 × 25, 60 × 30, 80 × 40, 100 × 50. It is the section for anything where a flat wide face is fixed to, glazed into or leaned on — handrail top rails, balustrade and screen frames, glazing bars and door / window sections, furniture and shop-fitting frames, machine guards, kitchen and hospital frames — and, in 2 and 3 mm walls, a light structural member for canopies, pergolas and cladding sub-frames in coastal architecture where painted steel would rust. Surfaces are satin (180–320 grit, the architectural standard) or 2B (mill finish, for hidden and industrial use); mirror on request. Structural design follows EN 1993-1-4 with the stainless material properties (304 yield ≈ 230 MPa, strongly work-hardening). We stock the 304 range in satin 320 and 2B, the common 316 sizes for coastal projects, and cut, mitre, laser-cut and weld frames in-house.

Weight table — square and rectangular stainless tube (kg/m and per 6 m)

Rectangular sizes are listed as width × height; density 7.9. Wall tolerance ±10 %, corner radius 1–1.5 × t.

Filter rows

Stainless square & rectangular tube 304 / 316 — weight per metre
Size (mm)	Wall (mm)	kg/m	kg per 6 m
12 × 12	1	0.358	2.15
15 × 10	1	0.37	2.22
15 × 10	1.2	0.44	2.64
15 × 10	1.5	0.54	3.24
15 × 15	1	0.453	2.72
15 × 15	1.2	0.538	3.23
15 × 15	1.5	0.661	3.97
16 × 16	1	0.485	2.91
16 × 16	1.2	0.576	3.46
16 × 16	1.5	0.709	4.25
19 × 19	1	0.567	3.4
19 × 19	1.2	0.675	4.05
19 × 19	1.5	0.832	4.99
19 × 19	2	1.09	6.54
20 × 10	1	0.453	2.72
20 × 10	1.2	0.538	3.23
20 × 10	1.5	0.661	3.97
20 × 15	1	0.533	3.2
20 × 15	1.2	0.634	3.8
20 × 15	1.5	0.781	4.69
20 × 15	2	1.016	6.1
20 × 20	1	0.613	3.68
20 × 20	1.2	0.729	4.37
20 × 20	1.5	0.901	5.41
20 × 20	2	1.176	7.06
22 × 22	1	0.677	4.06
22 × 22	1.2	0.806	4.84
22 × 22	1.5	0.996	5.98
22 × 22	2	1.303	7.82
25 × 10	1	0.533	3.2
25 × 10	1.2	0.634	3.8
25 × 10	1.5	0.781	4.69
25 × 15	1	0.613	3.68
25 × 15	1.2	0.729	4.37
25 × 15	1.5	0.901	5.41
25 × 15	2	1.176	7.06
25 × 20	1	0.693	4.16
25 × 20	1.2	0.825	4.95
25 × 20	1.5	1.02	6.12
25 × 20	2	1.335	8.01
25 × 25	1	0.772	4.63
25 × 25	1.2	0.921	5.53
25 × 25	1.5	1.14	6.84
25 × 25	2	1.495	8.97
25 × 25	2.5	1.837	11.02
25 × 25	3	2.167	13
30 × 10	1	0.613	3.68
30 × 10	1.2	0.729	4.37
30 × 10	1.5	0.901	5.41
30 × 10	2	1.176	7.06
30 × 15	1	0.693	4.16
30 × 15	1.2	0.825	4.95
30 × 15	1.5	1.02	6.12
30 × 15	2	1.335	8.01
30 × 20	1	0.772	4.63
30 × 20	1.2	0.921	5.53
30 × 20	1.5	1.14	6.84
30 × 20	2	1.495	8.97
30 × 20	2.5	1.837	11.02
30 × 20	3	2.167	13
30 × 25	1	0.84	5.04
30 × 25	1.2	1	6
30 × 25	1.5	1.24	7.44
30 × 25	2	1.63	9.78
30 × 30	1	0.932	5.59
30 × 30	1.2	1.112	6.67
30 × 30	1.5	1.379	8.27
30 × 30	2	1.814	10.88
30 × 30	2.5	2.236	13.42
30 × 30	3	2.645	15.87
32 × 32	1	0.96	5.76
32 × 32	1.2	1.15	6.9
32 × 32	1.5	1.42	8.52
32 × 32	2	1.87	11.22
32 × 32	2.5	2.31	13.86
32 × 32	3	2.74	16.44
35 × 15	1	0.76	4.56
35 × 15	1.2	0.91	5.46
35 × 15	1.5	1.13	6.78
35 × 15	2	1.48	8.88
35 × 20	1	0.852	5.11
35 × 20	1.2	1.017	6.1
35 × 20	1.5	1.259	7.55
35 × 20	2	1.654	9.92
35 × 20	2.5	2.036	12.22
35 × 20	3	2.406	14.44
35 × 35	1	1.091	6.55
35 × 35	1.2	1.304	7.82
35 × 35	1.5	1.618	9.71
35 × 35	2	2.133	12.8
35 × 35	2.5	2.635	15.81
35 × 35	3	3.124	18.74
40 × 10	1	0.76	4.56
40 × 10	1.2	0.91	5.46
40 × 10	1.5	1.13	6.78
40 × 10	2	1.48	8.88
40 × 15	1	0.852	5.11
40 × 15	1.2	1.017	6.1
40 × 15	1.5	1.259	7.55
40 × 15	2	1.654	9.92
40 × 15	2.5	2.036	12.22
40 × 15	3	2.406	14.44
40 × 20	1	0.932	5.59
40 × 20	1.2	1.112	6.67
40 × 20	1.5	1.379	8.27
40 × 20	2	1.814	10.88
40 × 20	2.5	2.236	13.42
40 × 20	3	2.645	15.87
40 × 30	1	1.091	6.55
40 × 30	1.2	1.304	7.82
40 × 30	1.5	1.618	9.71
40 × 30	2	2.133	12.8
40 × 30	2.5	2.635	15.81
40 × 30	3	3.124	18.74
40 × 40	1	1.251	7.51
40 × 40	1.2	1.495	8.97
40 × 40	1.5	1.858	11.15
40 × 40	2	2.452	14.71
40 × 40	2.5	3.033	18.2
40 × 40	3	3.602	21.61
40 × 40	4	4.703	28.22
45 × 15	1	0.91	5.46
45 × 15	1.2	1.09	6.54
45 × 15	1.5	1.35	8.1
45 × 15	2	1.78	10.68
45 × 20	1	0.99	5.94
45 × 20	1.2	1.18	7.08
45 × 20	1.5	1.46	8.76
45 × 20	2	1.92	11.52
45 × 45	1	1.41	8.46
45 × 45	1.2	1.686	10.12
45 × 45	1.5	2.097	12.58
45 × 45	2	2.771	16.63
45 × 45	2.5	3.432	20.59
45 × 45	3	4.081	24.49
50 × 10	1	0.91	5.46
50 × 10	1.2	1.09	6.54
50 × 10	1.5	1.35	8.1
50 × 10	2	1.78	10.68
50 × 20	1	1.091	6.55
50 × 20	1.2	1.304	7.82
50 × 20	1.5	1.618	9.71
50 × 20	2	2.133	12.8
50 × 20	2.5	2.635	15.81
50 × 20	3	3.124	18.74
50 × 25	1	1.171	7.03
50 × 25	1.2	1.399	8.39
50 × 25	1.5	1.738	10.43
50 × 25	2	2.292	13.75
50 × 25	2.5	2.834	17
50 × 25	3	3.363	20.18
50 × 30	1	1.251	7.51
50 × 30	1.2	1.495	8.97
50 × 30	1.5	1.858	11.15
50 × 30	2	2.452	14.71
50 × 30	2.5	3.033	18.2
50 × 30	3	3.602	21.61
50 × 40	1	1.41	8.46
50 × 40	1.2	1.686	10.12
50 × 40	1.5	2.097	12.58
50 × 40	2	2.771	16.63
50 × 40	2.5	3.432	20.59
50 × 40	3	4.081	24.49
50 × 50	1.2	1.878	11.27
50 × 50	1.5	2.336	14.02
50 × 50	2	3.09	18.54
50 × 50	2.5	3.831	22.99
50 × 50	3	4.559	27.35
50 × 50	4	5.979	35.87
50 × 50	5	7.349	44.09
60 × 20	1	1.251	7.51
60 × 20	1.2	1.495	8.97
60 × 20	1.5	1.858	11.15
60 × 20	2	2.452	14.71
60 × 20	2.5	3.033	18.2
60 × 20	3	3.602	21.61
60 × 30	1	1.41	8.46
60 × 30	1.2	1.686	10.12
60 × 30	1.5	2.097	12.58
60 × 30	2	2.771	16.63
60 × 30	2.5	3.432	20.59
60 × 30	3	4.081	24.49
60 × 40	1.2	1.878	11.27
60 × 40	1.5	2.336	14.02
60 × 40	2	3.09	18.54
60 × 40	2.5	3.831	22.99
60 × 40	3	4.559	27.35
60 × 40	4	5.979	35.87
60 × 60	1.5	2.814	16.88
60 × 60	2	3.728	22.37
60 × 60	2.5	4.628	27.77
60 × 60	3	5.516	33.1
60 × 60	4	7.255	43.53
60 × 60	5	8.943	53.66
70 × 20	1.2	1.65	9.9
70 × 20	1.5	2.05	12.3
70 × 20	2	2.71	16.26
70 × 20	2.5	3.36	20.16
70 × 20	3	4	24
70 × 30	1.5	2.29	13.74
70 × 30	2	3.03	18.18
70 × 30	2.5	3.76	22.56
70 × 30	3	4.48	26.88
70 × 40	1.5	2.575	15.45
70 × 40	2	3.409	20.45
70 × 40	2.5	4.229	25.37
70 × 40	3	5.038	30.23
70 × 70	1.5	3.293	19.76
70 × 70	2	4.366	26.2
70 × 70	2.5	5.426	32.56
70 × 70	3	6.473	38.84
70 × 70	4	8.531	51.19
70 × 70	5	10.538	63.23
80 × 20	1.5	2.29	13.74
80 × 20	2	3.03	18.18
80 × 20	2.5	3.76	22.56
80 × 20	3	4.48	26.88
80 × 30	1.5	2.53	15.18
80 × 30	2	3.35	20.1
80 × 30	2.5	4.16	24.96
80 × 30	3	4.96	29.76
80 × 40	1.5	2.814	16.88
80 × 40	2	3.728	22.37
80 × 40	2.5	4.628	27.77
80 × 40	3	5.516	33.1
80 × 40	4	7.255	43.53
80 × 40	5	8.943	53.66
80 × 40	6	10.582	63.49
80 × 50	1.5	3.01	18.06
80 × 50	2	4	24
80 × 50	2.5	4.96	29.76
80 × 50	3	5.92	35.52
80 × 50	4	7.79	46.74
80 × 50	5	9.62	57.72
80 × 50	6	11.39	68.34
80 × 60	1.5	3.293	19.76
80 × 60	2	4.366	26.2
80 × 60	2.5	5.426	32.56
80 × 60	3	6.473	38.84
80 × 60	4	8.531	51.19
80 × 60	5	10.538	63.23
80 × 60	6	12.496	74.98
80 × 80	1.5	3.771	22.63
80 × 80	2	5.004	30.02
80 × 80	2.5	6.223	37.34
80 × 80	3	7.43	44.58
80 × 80	4	9.807	58.84
80 × 80	5	12.133	72.8
80 × 80	6	14.41	86.46
100 × 20	1.5	2.76	16.56
100 × 20	2	3.65	21.9
100 × 20	2.5	4.54	27.24
100 × 20	3	5.41	32.46
100 × 30	1.5	3.01	18.06
100 × 30	2	4	24
100 × 30	2.5	4.96	29.76
100 × 30	3	5.92	35.52
100 × 40	1.5	3.293	19.76
100 × 40	2	4.366	26.2
100 × 40	2.5	5.426	32.56
100 × 40	3	6.473	38.84
100 × 40	4	8.531	51.19
100 × 40	5	10.538	63.23
100 × 40	6	12.496	74.98
100 × 50	1.5	3.532	21.19
100 × 50	2	4.685	28.11
100 × 50	2.5	5.824	34.94
100 × 50	3	6.952	41.71
100 × 50	4	9.169	55.01
100 × 50	5	11.336	68.02
100 × 50	6	13.453	80.72
100 × 60	1.5	3.771	22.63
100 × 60	2	5.004	30.02
100 × 60	2.5	6.223	37.34
100 × 60	3	7.43	44.58
100 × 60	4	9.807	58.84
100 × 60	5	12.133	72.8
100 × 60	6	14.41	86.46
100 × 80	1.5	4.25	25.5
100 × 80	2	5.641	33.85
100 × 80	2.5	7.021	42.13
100 × 80	3	8.387	50.32
100 × 80	4	11.083	66.5
100 × 80	5	13.728	82.37
100 × 80	6	16.324	97.94
100 × 100	1.5	4.728	28.37
100 × 100	2	6.279	37.67
100 × 100	2.5	7.818	46.91
100 × 100	3	9.344	56.06
100 × 100	4	12.359	74.15
100 × 100	5	15.323	91.94
100 × 100	6	18.237	109.42
120 × 40	1.5	3.771	22.63
120 × 40	2	5.004	30.02
120 × 40	2.5	6.223	37.34
120 × 40	3	7.43	44.58
120 × 40	4	9.807	58.84
120 × 40	5	12.133	72.8
120 × 40	6	14.41	86.46
120 × 60	1.5	4.25	25.5
120 × 60	2	5.641	33.85
120 × 60	2.5	7.021	42.13
120 × 60	3	8.387	50.32
120 × 60	4	11.083	66.5
120 × 60	5	13.728	82.37
120 × 60	6	16.324	97.94
120 × 80	1.5	4.728	28.37
120 × 80	2	6.279	37.67
120 × 80	2.5	7.818	46.91
120 × 80	3	9.344	56.06
120 × 80	4	12.359	74.15
120 × 80	5	15.323	91.94
120 × 80	6	18.237	109.42
120 × 120	2	7.555	45.33
120 × 120	2.5	9.413	56.48
120 × 120	3	11.258	67.55
120 × 120	4	14.91	89.46
120 × 120	5	18.513	111.08
120 × 120	6	22.065	132.39
140 × 80	3	10.301	61.81
140 × 80	4	13.635	81.81
140 × 80	5	16.918	101.51
140 × 80	6	20.151	120.91
140 × 140	2	8.831	52.99
140 × 140	2.5	11.008	66.05
140 × 140	3	13.172	79.03
140 × 140	4	17.462	104.77
140 × 140	5	21.703	130.22
140 × 140	6	25.893	155.36
150 × 50	3	9.344	56.06
150 × 50	4	12.359	74.15
150 × 50	5	15.323	91.94
150 × 50	6	18.237	109.42
150 × 100	3	11.736	70.42
150 × 100	4	15.548	93.29
150 × 100	5	19.31	115.86
150 × 100	6	23.022	138.13
150 × 150	2	9.469	56.81
150 × 150	2.5	11.805	70.83
150 × 150	3	14.129	84.77
150 × 150	4	18.738	112.43
150 × 150	5	23.298	139.79
150 × 150	6	27.807	166.84
160 × 80	3	11.258	67.55
160 × 80	4	14.91	89.46
160 × 80	5	18.513	111.08
160 × 80	6	22.065	132.39
200 × 100	3	14.129	84.77
200 × 100	4	18.738	112.43
200 × 100	5	23.298	139.79
200 × 100	6	27.807	166.84
200 × 200	2	12.659	75.95
200 × 200	2.5	15.793	94.76
200 × 200	3	18.913	113.48
200 × 200	4	25.118	150.71
200 × 200	5	31.272	187.63
200 × 200	6	37.376	224.26

EN 10219 / ASTM A554; mill, 180/240 grit satin or mirror finish.

Grades, standards and tolerances

Stainless rectangular tube — steel grades and standards
Grade / standard	Yield (MPa)	Note
1.4301 / 304 (EN 10296-2, A554)	≥ 210	indoor, inland — the stock grade
1.4401 / 316	≥ 220	coastal, pool, marine
1.4307 / 304L	≥ 200	heavy welded frames
1.4016 / 430	≥ 260	decorative indoor, to order

Mechanical use only unless ordered to a structural spec; for load-bearing design use EN 1993-1-4 with effective properties.

Common sizes and what they are used for

Rectangular stainless tube — stock sizes, walls and typical applications
Size (mm)	Walls (mm)	kg/m (1.5 mm)	Typical use
20 × 10	1.0 / 1.2	0.65	trims, light frames
30 × 15	1.0–1.5	1.0	display frames, furniture
40 × 20	1.0–2.0	1.35	handrail top rails, screens, furniture
50 × 25	1.2–2.0	1.7	balustrade frames, glazing bars, tables
60 × 30	1.5–2.0	2.1	door and window sections, guards
80 × 40	1.5–3.0	2.8	gate frames, canopy rafters, structures
100 × 50	2.0–3.0	3.5 (2 mm: 4.6)	pergola beams, machine frames
120 × 60 / 150 × 50	2.0–3.0	—	cladding sub-frames, heavy frames

kg/m for 1.5 mm wall; see the full table for other walls.

Lengths and stock

304 satin 320 and 2B from 20 × 10 to 100 × 50 in 1–2 mm and 80 × 40 to 150 × 50 in 2–3 mm, 6 m, at Dilovası; 316 in 40 × 20, 50 × 25, 80 × 40 and 100 × 50. Other sizes, mirror finish and 316 rectangular in full range from the mill in 2–3 weeks. Cut to length, mitred and laser-cut on our tube laser.

Cutting, mitring, welding and finishing

Cold-saw or tube-laser cut (mitres, notches and holes in one pass); bend only large sizes on a section bender at ≥ 5 × height; TIG-weld with 308L / 316L and purge on visible joints, grind flush and re-satin lengthwise; pickle heat tint. Frames are welded on the wide face where the seam is hidden; glazing bars take 10–12 mm glass in a 20–25 mm channel. Stainless-only tooling; film off within 6 months.

Where it is used

Handrail top rails and balustrade frames
Glazing bars, door, window and screen sections
Furniture, tables, counters and shop fittings
Machine guards, kitchen and hospital frames
Canopy, pergola and cladding sub-frames (316, coastal)
Gate and fence frames

Rectangular vs square vs round

Square tube is the post and the symmetric frame member; rectangular the rail and the beam; round tube the handrail and the bend. All three come in the same satin finish and grades; for chloride sites use 316.

Price

Rectangular stainless tube is priced per ton from the stainless profile list, moving with nickel; satin carries a polishing premium over 2B, large sections a size premium and 316 about 40 %. The bands below are the month\'s indicative FOB Istanbul ranges for the small and large 304 ranges.

304 rectangular · 20×10 to 80×403 650 – 4 050USD/MT · FOB Istanbul

304 rectangular · 100×50 to 150×503 770 – 4 170USD/MT · FOB Istanbul

Bands from our weekly export list (September 2026), FOB Istanbul, full-container quantities, excluding freight and certificates. Firm price per project on RFQ within one working day.

Export and packing

Rectangular tube is bundled flat in 100–300 kg packs — satin tube film-wrapped, 2B with paper separators — in PE and cardboard on pallets or crated for mixed orders; 12–16 t per 20', 18–22 t per 40' HC in 6 m. HS 7306.61.

Term	Detail
MOQ	500 kg
Incoterms	FOB Istanbul · CIF / CFR Gulf, Africa · DAP EU, Balkans, Iraq, Caucasus · DAP Aktau
Lead time	Stock 3–5 working days; 316 and large sizes 2–3 weeks
Packing	Film per tube (satin), bundles 100–300 kg in PE and cardboard, crated for mixed lots
Container / truck	20' ≈ 12–16 t; 40' HC ≈ 18–22 t
Documents	Invoice, packing list, EN 10204 3.1, certificate of origin; 3.2 and PED on request
Payment	30% advance, balance against B/L copy; L/C at sight above 100 t

Certificates

Supplied with the strip mill's EN 10204 3.1 (grade, chemistry, mechanicals) and the tube mill's dimensional, weld and finish record; 3.2 witnessing for structural or project orders on request.

How to order

Specify grade, size (width × height × wall), finish (satin grit / 2B / mirror), length, quantity in pieces or metres, cutting (lengths, mitres, laser file) and indoor / coastal use.

Standards

EN 10296-2 — welded stainless tubes for mechanical use
ASTM A554 — welded ornamental tubing
EN 10219 (structural, S355-equivalent design by EN 1993-1-4)
EN 10204 3.1

Grades

Grade data sheets (chemistry, mechanicals, equivalents) are on our reference site: 1.4301 · 1.4401 · 1.4307

Frequently asked questions

What sizes of stainless rectangular tube do you stock?

20 × 10 to 150 × 50 mm in 1–3 mm walls in 304 (satin 320 and 2B), 6 m; 316 in 40 × 20, 50 × 25, 80 × 40 and 100 × 50.

What is the weight of 50 × 25 × 1.5 stainless tube?

About 1.7 kg/m (10.2 kg per 6 m); the full table above covers every size and wall.

Can stainless rectangular tube be used structurally?

Yes, in 2–3 mm walls for canopies, pergolas and frames, designed to EN 1993-1-4 with stainless properties; for heavy structures galvanized S355 hollow sections are far cheaper.

Satin or 2B?

Satin (brushed) for anything visible — architecture, furniture, rails; 2B for hidden frames and industrial use, about 5–8 % cheaper.

304 or 316 rectangular tube outdoors?

304 inland; 316 within a few kilometres of the sea, in pools or with de-icing salt.