Cold rolled steel is metal that has been made by rolling. When they cold roll steel, it is to get a better finish or more strength. Cold rolled steel is made by passing the steel through a number of rollers after the metal has cooled from initial production. The steel is reduced in thickness incrementally as it passes through the rollers. Cold rolled steels tend to have lower carbon content than hot rolled steels, making them more durable. They can also be rolled to more specific dimensions due to the lack of shrinkage that occurs with hot rolled steels. Cold rolled steels are typically rolled to have a matte appearance. They may also be painted, if it is called for, by removing the lubricants that are frequently applied prior to shipping.

Round Pipe		Square Pipe	Rectangle Pipe	Oval Pipe
φ11.8	φ60	102	8*16	9.5*17
φ13	φ63	122	8*18	10*20
φ14	φ65	152	10*18	10*22.5
φ15	φ67	162	10*20	11*21.5
φ16	φ68	172	10*22	11.6*17.8
φ17.5	φ70	182	10*30	12*23
φ18	φ73	192	11*21.5	14*42
φ19	φ75	202	11.6*17.8	14*50
φ20	φ76	212	12*14	15*30
φ21	φ80	222	12*34	16*22
φ22	φ85	242	12*48	16*35
φ23	φ100	252	12.3*25.4	16*45
φ24		25.42	13*23	20*40
φ25		282	14*20	24.6*46
φ26		28.62	14*72	30*60
φ27		302	15*30	31.5*53
φ27.5		322	15*88	40*12
φ28		352	16*26	13.5*43.5
φ28.6		372	17.5*15.5	20*38
φ29		382	18*35	25*50
φ30		402	17*37
φ31		452	19*38
φ32		482	20*30
φ33.5		502	20*40	Egg 22*40
φ34			22*25
φ35			22*26
φ36			25*38
φ37			25*30
φ38			25*40
φ39			25*50
φ40			27*40
φ42			30*40
φ43			30*50
φ44			30*60
φ45			30*70
φ47			40*60
φ48			45*75
φ50			40*80
φ50.8			50*100
φ52			35*78
φ54			15.5*35.5
φ56
φ58