Bulb flat steel NK Grade A|Shipbuilding Flat Bulb NK A

Bulb flat steel NK Grade A| Shipbuilding Flat Bulb steel NK A
 
Our Mill produce and export shipbuilding profile, bulb flat, flat bar material NK Grade A, NK Grade B, NK Grade D, NK Grade AH36,NK Grade AH32, NK Grade DH32,NK Grade DH36 for ship building project.
 
Our bulb flat steel mainly size is HP80*5, HP80*6, HP100*7, HP100*8, HP120*6, HP120*7 , HP120*8, HP140*7, HP140*8, HP140*10, HP160*7, HP160*8, HP160*9, HP160*11, HP180*8, HP180*9, HP180*10, HP180*11, HP200*9, HP200*10, HP200*11, HP200*12, HP220*10, HP220*11, HP220*12, HP240*10, HP240*11, HP240*12, HP260*10, HP260*11, HP260*12, HP280*11, HP280*12, HP280*13, HP300*11, HP300*12, HP300*13, HP320*12, HP320*13, HP320*14 and so on
 
 
Our mill shipbuilding bulb flat have passed DNV, ABS , LR , BV, GL , NK, KR, RINA,CCS Approval in quality. The better quality, the most competitive price. if you have any requirement in bulb flat, please feel free to contact us by email sales@unitedsteelplate.com
 
The Chemical or element or Composition NK Grade A bulb flat

NK GRADE A bulb flat general Strength Chemical Composition
Grade	The Element Max (%)
	C	Si	Mn	P	S	N
NK GRADE A	0.21	0.50	2.5*C	0.035	0.035	0.02

Crack Sensitivity:  Pcm = (C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B)%
Carbon Equivalent:  Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
 
 

NK GRADE A  Bulb flat steel  property mechanical
Grade		Mechanical Property			Charpy V Impact Test
	Thickness	Yield	Tensile	Elongation	Degree	Energy 1	Energy 2
NK GRADE A	mm	Min Mpa	Mpa	Min  %	20	J	J
	t≤50	235	400-520	18%		-	-
	50＜t≤70	235	400-520	18%		24	34
	70＜t≤100	235	400-520	18%		27	41
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal

 
 
The Equivalent of NK Grade A bulb flat for shipbuilding steel profile.
BV Grade A, CCS Grade A, DNV Grade A, GL Grade A, NK Grade A, KR Grade A, RINA Grade A, ABS Grade A, LR Grade A