550 * 300 national standard H-section steel, Q345B low alloy H-section steel, long-term supply

  H-section steel is divided into hot-rolled H-section steel And welded H-section steel (H)
Hot rolled H-section steel is divided into wide flange H-section steel (HW) Middle flange H-section steel (HM) and narrow flange H-section steel (HN)
HW  Is that the height of H-section steel is basically equal to the width of flange; It is mainly used for steel core column in reinforced concrete frame structure column, also known as rigid steel column; It is mainly used for columns in steel structures
HM  Is the ratio of H-beam height to flange width, which is approximately 1
33 ~ ~ 1
75 Mainly in steel structure: used as steel frame column and frame beam in frame structure bearing dynamic load; For example: equipment platform
HN  The ratio of H-section steel height to flange width is greater than or equal to 2, which is mainly used for beams; The purpose of I-beam is equivalent to HN section steel;
The main materials of H-section steel include Q235B, SM490, SS400, Q345, Q345B, a992, etc

450*200	R 469*196*14 6*20 6	113
	446*199*8*12	66 7
	450*200*9*14	76 5
450*300	440*300*11*18	124
450*400	#458*417*30*50	415
500*200	496*199*9*14	79 5
	500*200*10*16	89 6
	R 506*201*11*19	102
500*300	482*300*11*15	115
	488*300*11*18	129
500*400	#498*432*45*70	605
550*300	R 544*300*11*15	116
	R 550*300*11*18	130
600*200	596*199*19*15	95 1
	600*200*11*17	106
	R 606*201*12*20	118
600*300	582*300*12*17	137
	588*300*12*20	151
	R 594*302*14*23	170
650*300	R 646*299*10*15	120
	R 650*300*11*17	134
	R 656*301*12*20	154
700*300	R 692*300*13*20	163
	R 700*300*13*24	185
750*300	R 734*299*12*16	143
	R 742*300*13*20	168
	R 750*300*13*24	187
	R 758*303*16*28	224