Dojran Steel

Dojran Steel produces rectangular flat bars (flats) at several lengths, mainly of 6 meters, with width from 20mm to 140mm and thickness ranging from 3mm to 20mm. Due to the wide range of available sizes, flats are used in various metal constructions, traditional railings, drillings, metal frames, machine parts, mechanical equipment, etc.

Chemical composition and mechanical characteristics
Steel grade	Chemical composition			Mechanical characteristics
Steel grade	C (%) max	P (%) max	S (%) max	Yield strength (N/mm²) min	Tensile strength (N/mm²)	Elongation 5d₀, (%) min
S235JR (St 37-2)	0.170	0.040	0.040	235	360-510	26
S275JR (St 44-2)	0.210	0.040	0.040	275	410-560	23

Dimensions, weight and tolerances
Width d (mm)	Allowed width deviation (mm)	Thickness s (mm)
		3	4	5	6	6.5	7	8	9	10	11	12	13	14	15	16	17	18	20
		Permissible thickness deviation (mm)
		± 0.3		± 0.5
		Nominal weight (kg/m)
20	± 0.75	0.47	0. 63	0.79	0.94	1.02	1.10	1.26	1.41	1.57	̶	1.88	2.06	̶	2.36	̶	̶	̶	̶
22		0.52	0.69	0.86	1.04	1.12	1.21	1.38	̶	1.73	1.90	2.07	2.25	2.42	2.59		2.94	̶	̶
25		0.59	0.79	0.98	1.13	1.28	1.37	1.57	̶	1.98	̶	2.36	2.55	2.75	2.94	3.14	̶	̶	̶
26		0.61	0.82	1.02	1.22	1.33	1.43	1.63	̶	2.04	̶	2.45	2.65	2.86	3.06	3.27	̶	3.67	4.08
28		0.66	0.88	1.10	1.32	1.43	1.54	1.76	̶	2.20	̶	2.64	2.86	3.08	̶	3.52	̶	3.96	̶
30		0.71	0.94	1.18	1.41	1.53	1.65	1.88	2.12	2.36	̶	2.83	3.06	3.30	3.53	3.77	̶	4.24	4.71
32		0.75	1.00	1.26	1.51	1.63	̶	2.01	̶	2.51	̶	3.01	3.27	3.52	3.77	4.02	̶	̶	5.02
35		0.82	1.10	1.37	1.65	1.79	1.92	2.20	̶	2.75	̶	3.30	3.57	3.85	4.12	4.40	̶	1.95	5.50
38	± 1.00	0.89	1.19	1.49	1.79	1.94	̶	2.39	̶	2.98	̶	3.58	3.88	4.18	4.47	4.77	̶	̶	5.97
40		0.94	1.26	1.57	1.88	2.04	2.20	2.51	2.83	3.14	̶	3.77	4.08	4.40	4.71	5.02	̶	5.85	6.28
45		1.06	1.41	1.77	2.12	2.30	2.47	2.83	̶	3.53	̶	4.24	4.59	4.95	5.30	5.85	̶	̶	7.07
50		1.18	1.57	1.96	2.39	2.55	2.75	3.14	3.53	3.93	̶	4.71	5.10	5.50	5.89	6.28	̶	7.07	7.85
55		1.30	1.73	2.16	2.59	2.81	̶	3.45	̶	4.32	̶	5.18	5.61	6.04	6.48	6.91	̶	7.77	8.64
60		1.41	1.88	2.36	2.83	3.06	3.30	3.77	4.24	4.71	̶	5.65	6.12	̶	7.07	7.54	̶	8.48	9.42
65		1.53	2.04	2.55	3.06	3.32	̶	4.08	4.59	5.10	̶	6.12	6.63	̶	7.65	8.16	̶	̶	10.20
70		1.65	2.20	2.75	3.30	3.57	3.85	4.40	̶	5.50	̶	6.59	7.14	̶	8.24	8.79	̶	9.89	11.00
75		1.77	2.36	2.94	3.53	3.83	̶	4.71	̶	5.89	̶	7.07	7.65	̶	8.83	9.42	̶	̶	11.80
80	± 1.50	1.88	2.51	3.14	3.77	4.68	4.40	5.02	̶	6.28	6.91	7.54	8.16	̶	9.42	10.00	̶	̶	12.60
90		2.12	2.83	3.53	4.24	4.59	̶	5.65	6.36	7.07	7.77	8.48	9.18	̶	10.60	11.30	̶	12.70	14.10
100		2.36	3.14	3.93	4.71	5.10	̶	6.28	̶	7.85	8.64	9.42	10.20	11.00	11.90	12.60	̶	̶	15.70
110	± 2.00	2.59	3.45	̶	̶	̶	̶	6.91	7.77	8.64	9.50	10.40	11.20	12.10	13.00	13.80	̶	̶	17.30
120	± 2.00	̶	̶	̶	̶	̶	̶	7.54	̶	9.42	10.40	11.30	12.20	̶	14.10	15.10	̶	̶	18.80
130	± 2.50	̶	̶	̶	̶	̶	̶	8.16	9.18	10.20	11.20	12.20	13.30	14.30	15.30	16.30	̶	̶	20.40
140	± 2.50	̶	̶	̶	̶	̶	̶	8.79	̶	11.00	̶	13.20	̶	̶	16.50	17.60	̶	̶	22.00

Flats-Hot-rolled-bars-of-rectangular-cross-section

Flats Hot-Rolled bars of rectangular cross-section