X90 pipeline steel with low C, Mn, Nb microalloyed composition design, relative in terms of X80 pipeline steel, its Cr and Mo alloying element content up to 0.3% and 0.2% respectively. Cr element content is added to improve the strength of the pipeline steel, X90 strength of pipeline steel X80 pipeline steel increased by 12.5%.X90 and X80 pipeline steel in simulated artificial sea water solution achieves HTC resistance standard, but X90 pipeline steel HTC resistance performance of X80 pipeline steel is poor.

Chemical composition of the X90 pipeline steel (mass)%
 

Grade	C	Si	Mn	S	P	Nb	Ni+Cr+Mo+Ti	Fe
X90	0.06	0.25	1.90	0.002	0.008	0.09	<1.0	-

The hydrogen permeation dynamic data of X90 steel samples with different thicknesses
 

d/mm	J∞/(10-5A.cm-2)	N∞/(10-10mol.cm-2.s-1)	Deff/(10-6cm2.s-1)	C0/(10-5mol.cm-3)
0.40	14.40	13.09	0.72	7.30
0.70	6.10	6.32	1.35	3.27
0.80	5.16	5.35	1.46	2.94
1.00	3.74	3.88	1.75	2.22

API 5L X90 Pipeline Steel Plate Specification：
 

Steel Standard: API 5L X90
Thickness: 6 mm to 40 mm
Width: from 1.6 meters wide to3.8m
Length: Up to 18 meters

API 5L X90 Pipeline Steel Plate Applications：
 

API 5L X90 Pipeline steel is used for transporting oil, gas and other big by welded steel pipe with hot rolled coil plate or lenient plate. Pipeline steel in use process, API 5L X90 Pipeline steel in addition to the requirement has high compression strength, also requires a high low temperature toughness and excellent welding performance.
 

As the professional Chinese API 5L X90 Pipeline steel plate supplier, we will supply our customers the best quality with the competitive price ,the best service and rapid delivery time. If you purchase the X90 Pipeline steel plate, we support you to pay a visit to our company and do inspection. If you have any need, you are welcome to contact me .We are sincerely looking for your cooperation.