Q235,Q355 Steel Channel

Q235 Q355 Steel Channel

Q235 steel is a plain carbon structural steel which is widely used in China.
Q235 material in Chinese standard GB/T 700 is divided into 4 quality grades:
Q235A, Q235B, Q235C and Q235D;

Q235 steel has good plasticity, toughness and weldability, moderate strength,
good cold bending performance.

Q235 Steel are widely used in construction and engineering welded structures,
to make steel bars or build factory buildings, high voltage transmission towers,
bridges, vehicles, boilers, containers, etc., and also used as a mechanical part with
less demanding performance such as less stressed rods, connecting rods, screws, nuts,
ferrules, brackets, and stands, etc.

Q355 steel is a low alloy high strength structural steel
commonly used in China, which replaced Q345.
*Sizes&Weights:

	SIZES						SECTIONS
	h	b	d	t	r	r1
	（mm）						(cm2)	(kg/m)
5	50	37	4.5	7	7	3.5	6.925	5.44
6.3	63	40	4.8	7.5	7.5	3.8	8.446	6.63
6.5	65	40	4.3	7.5	7.5	3.8	8.292	6.51
8	80	43	5	8	8	4	10.24	8.04
10	100	48	5.3	8.5	8.5	4.25	12.74	10
12	120	53	5.5	9	9	4.5	15.36	12.1
12.6	126	53	5.5	9	9	4.5	15.69	12.3
14a	140	58	6	9.5	9.5	4.8	18.51	14.5
14b		60	8				21.31	16.7
16a	160	63	6.5	10	10	5	21.95	17.2
16b		65	8.5				25.15	19.8
18a	180	68	7	10.5	10.5	5.2	25.69	20.2
18b		70	9				29.29	23
20a	200	73	7	11	11	5.5	28.83	22.6
20b		75	9				32.83	25.8
22a	220	77	7	11.5	11.5	5.8	31.83	25
22b		79	9				36.23	28.5
24a	240	78	7	12	12	6	34.21	26.9
24b		80	9				39.01	30.6
24c		82	11				43.81	34.4
25a	250	78	7	12	12	6	34.91	27.4
25b		80	9				39.91	31.3
25c		82	11				44.91	35.3
27a	270	82	7.5	12.5	12.5	6.2	39.27	30.8
27b		84	9.5				44.67	35.1
27c		86	11.5				50.07	39.3
28a	280	82	7.5	12.5	12.5	6.2	40.02	31.4
28b		84	9.5				45.62	35.8
28c		86	11.5				51.22	40.2
30a	300	85	7.5	13.5	13.5	6.8	43.89	34.5
30b		87	9.5				49.89	39.2
30c		89	11.5				55.89	43.9
32a	320	88	8	14	14	7	48.5	38.1
32b		90	10				54.9	43.1
32c		92	12				61.3	48.1
36a	360	96	9	16	16	8	60.89	47.8
36b		98	11				68.09	53.5
36c		100	13				75.29	59.1
40a	400	100	10.5	18	18	9	75.04	58.9
40b		102	12.5				83.04	65.2
40c		104	14.5				91.04	71.5

Chemical Compositions and Michenical Properties:

Chemical Composition %
Steel Grade	C  (≤)	Si (≤)	Mn (≤)	P (≤)	S (≤)
Q235B	0.2	0.35	1.4	0.045	0.045
Q355B	0.24	0.55	1.6	0.035	0.035
Mechanical Properties (MPa)
Steel Grade	Yield Strength	Tensile Strength	Elongation (≥ %); Thickness ≤40
Q235B	235	370-500	26
	Thickness≤16	Thickness≤16	Thickness≤16
Q355B	355	470-630	20/Transverse
			22/Vertical

For more details,pls contact with us.