Aluminum u channel is the most commonly used aluminum for structural applications. It has good machinability, above average corrosion resistance, and is excellent for welding.

Marine grade aluminum u channel is ofen used for shipbuilding., mainly used in hull structures and generally consists of bottom plates, bottom plates, side plates, bulge bulwarks, decks, plates, bulkheads, hoardings, ribs, brackets, stringers, ribs, keels, rebars, columns and rods.It has above average corrosion resistance, good machinability, and it is excellent for welding.
6061 T6 aluminium u channel is heat-treatable, resistant to stress cracking and non-magnetic.

6063-T5 aluminium u channel is excellent for outdoor use and architectural trim due to its superior corrosion resistance.
Marine grade aluminum u channel Specification:
Alloy:  5083, 5086, 5383, 5059, 6061, 6063,6082,6005A
Temper: H111/H112, T5/T6
Certificate: BV /DNV /ABS/Lioyds
Thickness: 3mm---50mm

Mechanical Properties of Marine Aluminum Channel
Alloy	Form	Thickness(mm)	Temper	Rm	Rp0.2 (Mpa)	A% Min
				Min.		A₅₀	A
5086	Shapes, Bar, Tube	3≤t≤50	H112	240	95	10	12
5083	Shapes, Bar, Tube Shapes, Bar, Tube	3≤t≤50 3≤t≤50	H111 O and H112	270  270	110     125	10    10	12     12
5059	Shapes, Bar, Tube	3≤t≤50	H112	330	200		10
5383	Shapes, Bar, Tub	3≤t≤50	O	290	145	17	17
	Shapes, Bar, Tub	3≤t≤50	H112	310	190		13
6061	Shapes, Bar, Tube Profiles	3≤t≤50 3≤t≤50	T5 or T6 T5 or T6	260   245	240    205	10	8       4
6005A	Shapes, Bar, Tube Profiles	3≤t≤50	T5	260	215	9	8
	Shapes, Bar, Tube Profiles	3≤t≤10	T6	260	215	8	6
		10≤t≤50		250	200	8	6
6082	Shapes, Bar, Tube Closed shapes	3≤t≤50 3≤t≤50	T5 or T6 T5 or T6	310     290	260    240	10	8       5

Marine Aluminum Channel Aluminum Alloys Composition
Alloy	Si	Fe	Cu	Mn	Mg	Cr	Ni	Zn	Ti	Ga	Others		Alu
											Each	Toal
5083	0.40	0.40	0.1	0.4-1.0	4.0--4.9	0.05--0.25	--	0.25	0.15	--	0.05	0.15	Remainder
5383	0.25	0.25	0.20	0.7-1.0	4.0-5.2	0.25	--	0.40	0.15	--	0.05	0.15	Remainder
5086	0.40	0.50	0.1	0.2--0.7	3.5-4.5	0.05-0.25	-	0.25	0.15	-	0.05	0.15	Remainder
5059	0.45	0.50	0.25	0.6-1.2	5.0-6.0	0.25	-	0.40-0.9	0.20	-	0.05	0.15	Remainder
6061	0.4-0.8	0.7	0.15-0.40	0.15	0.8-1.2	0.04-0.35	-	0.25	0.15	-	0.05	0.15	Remainder
6005A	0.50-0.9	0.35	0.30	0.50	0.40-0.7	0.30	-	0.20	0.10	-	0.05	0.15	Remainder
6082	0.7-1.3	0.5	0.1	0.4-1.0	0.6-1.2	0.25	-	0.20	0.10	-	0.05	0.15	Remainder

Material Code	A(mm)	B(mm)	T1(mm)	T2	R1	R2	G (Kg/m)
TP-07B	9	9	0.7	0.7			0.048
CAM_A000029	10	10	1	1			0.076
TP-07	10	10	1	1			0.076
ALD_D000397	10	10	1.6	1.6			0.116
CAM_A001124	10	10	2	2			0.14
CAM_A000031	10	15	1.5	1.5			0.15
TP-07C	12	12	0.8	0.8			0.074
ALD_D003912	12	12	1.6	1.6			0.142
CAM_A000032	15	15	1.5	1.5			0.17
CAM_A000216	15	15	2	2			0.221
CAM_A000772	15	20	2	2			0.275
ALD_D001119	16	16	1.6	1.6			0.194
ALD_D000391	16	16	3	3			0.34
AUS_D000167	16	32	1.6	1.6			0.245
CAM_D002312	19.05	19.05	3.18	3.18			0.435
SZGYC-078	19.5	19.5	2	2			0.295
CAM_A000030	20	10	1.5	1.5			0.15
CAM-512	20	10	2	1		0.5	0.608
ALD_D003913	20	16	1.6	1.6			0.221
CAM_A000033	20	20	1.5	1.5			0.231
ALD_D001120	20	20	1.6	1.6			0.245
CAM_A000217	20	20	2	2			0.302
CAM_A000953	20	20	3	3			0.437
CAM_A000332	20	30	2	2			0.41
CAM_A000300	20	40	2	2			0.518
CAM_A000956	20	40	2.5	2.5			0.641
TP-121	20.4	12	1.2	1.2			0.144
CAM_A000824	25	15	2	2			0.275
TP-84	25	19	3	3	1		0.462
CAM_A001055	25	20	3	3			0.478
ALD_D000392	25	25	1.6	1.6			0.31
CAM_A000218	25	25	2	2			0.383
CAM_A000580	25	25	2.5	2.5			0.472
CAM_A000331	25	25	3	3			0.559
ALD_D001121	25	40	3	3			0.802
CAM_D001444	25.40	12.7	3.18	3.18			0.382
CAM_D000065	25.40	25.4	3.05	3.05			0.576
CAM_D002313	25.40	25.4	3.18	3.18			0.598
CAM_D002314	25.40	38.1	3.18	3.18			0.817
TP-1010	30.00	5	1.00	1.00			0.103
CAM_A000759	30	15	3	3			0.437
TP-1211	30	18	1	1			0.173
CAM_A000336	30	20	2	2			0.356
CAM_A000948	30	20	3	3			0.518
CAM_A000333	30	30	2	2			0.464
CAM_A000219	30	30	3	3			0.68
CAM_A000797	30	40	3	3			0.842
CAM_A000615	30	50	3	3			1.004
CAM_A000722	30	50	4	4			1.318
CAM_D004592	31.75	19.05	3.05	3.05			0.524
CAM_D000442	31.75	31.75	3.05	3.05			0.733
CAM_A000867	31.75	31.75	4.76	4.76			1.102
ALD_D000393	32	25	3	3			0.616
TP-188	33.4	30	1.2	1.2			0.294
CAM_A000760	35	20	2	2			0.383
CAM_A000335	35	35	2	2			0.545
CAM_A000334	35	35	3	3			0.802
ALD_D002212	36.6	25.4	1.6	1.6			0.364
ALD_D000186	38	26	1.2	1	0.5	0.6	0.256
CAM_D000067	38.10	25.4	3.05	3.05			0.681
CAM_D001526	38.10	25.4	3.18	3.18			0.707
CAM_D000066	38.10	38.1	3.05	3.05			0.889
CAM-514-1	39.00	45	4.00	4.00	2.00		1.325
CAM_A000222	40	20	2	2			0.41
CAM_A000454	40	20	4	4			0.778
ALD_D000548	40	25	3	3			0.68
CAM_A000955	40	30	2	2			0.518
CAM_A000103	40	30	3	3			0.761
CAM_A000337	40	30	3	3			0.761
CAM-514-10	40	30	4	4	4		1.023
CAM_A000659	40	40	2	2			0.626
CAM_A000455	40	40	2.5	2.5			0.776
CAM_A000220	40	40	3	3			0.923
CAM_A000047	40	40	4	4			1.21
CAM_A000422	40	60	3	3			1.247
CAM_A000595	40	60	4	4			1.642
CAM-243	40.5	30	2.5	3.5			0.793
CAM-243A	40.5	30	2.5	3.5	0.5		0.634
CAM-1242	42	25		10			2.241
TP-87	44	13	2	2	1		0.356
CAM_A000226	50	20	2	2			0.464
ALD_D000549	50	25	3	3			0.761
CAM_A000048	50	30	3	3			0.842
CAM_A000519	50	30	4	4			1.102
CAM_A000456	50	40	4	4			1.318
CAM-514-9	50	45	5	3	5		1.351
CAM_A000924	50	50	3	3			1.166
CAM_A000221	50	50	4	4			1.534
CAM_A000737	50	50	5	5			1.89
CAM-514-7	50	50	5	5	5		1.939
SZGYC-077	50	92	5	5
CAM_A000461	50	100	5	5			3.24
CAM_D000068	50.80	25.4	3.05	3.05			0.785
CAM_D000833	50.80	25.4	3.18	3.18			0.817
CAM_D002341	50.80	25.4	3.30	3.30	2.54		0.854
CAM_D001022	50.80	31.75	4.32	6.60	2.38		0.911
CAM_D002315	50.80	50.8	6.35	6.35			2.394
CAM_A000694	50.8	101.6	6.35	6.35			4.137
TP-81	52	23	2	2	1		0.508
ALD_D000550	53	25	1.6	1.6			0.431
CAM_D004738	53.34	25.4	1.27	1.27			0.348
ALD_D000854	54.20	50	1.60	1.60			0.652
CAM_A000820	55	25	2	2			0.545
LZMX-211	56.5	25	10	10			2.875
CAM_D004735	56.77	50.8	1.57	1.57			0.660
CAM_D000972	60.00	20	2.00	2.00			0.518
CAM_A000223	60	30	3	3			0.923
CAM_A000762	60	40	2.5	2.5			0.911
CAM_A000581	60	40	3	3			1.085
CAM_A000227	60	40	4	4			1.426
CAM_A001273	60	40	5	5			1.755
CAM_A001058	60	50	2	2			0.842
CAM_A000676	60	50	3	3			1.247
CAM_A000588	60	60	5	5			2.295
CAM_D002026	63.50	38.1	3.18	3.18			1.145
CAM_A000423	65	25	2.5	2.5			0.742
CAM_A000589	65	55	2.5	2.5			1.148
TP-1626	69	35	3	3			1.077
TP-175	76	20.6	1	1			0.311
TP-1011	76.20	25.4	1.2	1.2			0.404
CAM_D001527	76.20	25.4	3.18	3.18			1.035
CAM_D002342	76.20	25.4	3.30	5.08	6.35		1.332
CAM_D001319	76.20	35.8	4.32	4.32	6.90	2.50	1.670
034102	76.2	38.05	6.53	4.32	6.86	2.54	2.13
CAM_D004124	76.2	38.1	3.3	5.08	6.35		1.681
034212	76.2	38.1	3.3	6.35	6.86		1.927
CAM_A000868	76.2	38.1	6.35				2.395
ALD_D001135	76.2	38.1	6.35	7.92	7.62		2.732
CAM_D001296	76.2	44.5	4.3	6.6	6.35		2.366
CAM_A000831	76.2	50.8	6.35	6.35			2.831
TP-89	78	40	3.5	3.5	2		1.427
AUS_D000647	79.6	12	1.2	1.2	0.5	0.6	0.327
CAM_A000660	80	20	2	2			0.626
CAM_A000224	80	30	3	3			1.085
CAM_A000338	80	40	3	3			1.247
CAM_A000845	80	40	4	4			1.642
CAM_A000507	80	40	5	5			2.025
CAM_A000980	80	40	6	6			2.398
CAM_A001117	80	50	5	5			2.295
CAM_A000424	86	40	3	3			1.296
CAM_A000844	90	50	3	3			1.49
CAM-1342	94	80	5	5			3.294
CAM_A000339	100	40	3	3			1.409
CAM_A001222	100	50	3	3			1.571
CAM_A000225	100	50	5	5			2.565
CAM_A001320	101.6	40.1	4.76	4.76	7.1	2.8	2.266
CAM_A002458	101.6	40.13	4.57	4.57	7.11	2.79	2.182
034108	101.6	41.83	6.27	4.57	7.11	2.79	2.648
CAM_A000832	101.6	50.8	6.35	6.35			3.266
ALD_D000394	101.6	50.8	6.35	7.92	9.14		3.74
CAM_D005247	101.6	57.15	4.83	7.37	6.35		3.452
CAM_A000691	106	40	3	3			1.458
CAM_A001057	120	40	3	3			1.571
CAM_A001073	120	45	10	10			5.13
CAM_A000773	120	60	8	8			4.838
CAM_A000677	125	80	8	8			5.81
ALD_D000530	127	63.5	6.35	9.52	10.66		5.247
CAM_D005248	127	69.85	4.83	8.13	7.62		4.576
TP-1689	130	80	3				2.3
CAM-07	132	140	2.5	2.5			2.781
CAM-514-2	145	70	5	7	6		4.505
CAM_D002343	152.4	48.8	5.08	5.08	6.86	2.54	3.336
CAM_D006573	152.4	50.8	7.98	7.98	7.62	3.05	5.183
CAM_D005082	152.4	63.5	4.32	7.37	7.62		4.198
ALD_D000395	152.4	63.5	6.35	7.92	10.67
CAM_D005250	152.4	82.55	5.33	8.89	7.62		5.969
LZMX-191	157	56.2/42.2	14.4	17/13			8.996
CAM-1076	160	75	10	8.5	8		7.337
ALD_D000396	177.8	76.2	6.35	11.1	12.2		7.408
CAM_D005251	177.8	88.9	5.33	9.65	7.62		6.983
ALD_D001192	180	80	11	11	6		9.486
ALD_D002366	200	90	8	10	4		8.651
ALD_D000551	200	90	10	10			9.72
CAM_D004514	203.2	76.2	4.83	8.89	7.62		6.141
CAM_D005087	203.2	95.25	6.35	10.41	8.89		8.575
TP-971	210.5	40	2	2			1.547
CAM-1264	220	100	16	16	10	5	16.815
CAM_D005252	254	88.9	6.35	10.41	8.89		9.089
CAM_D005253	254	107.95	7.87	12.7	10.16		12.383
CAM_D005083	304.8	101.6	7.37	11.94	10.16		12.256
ALD_D000552	381	152.4	9.5	12.7	15.9		19.571