Shanghai katalor industry co.,ltd offers API 5L X52 steel plate/pipes as large diameter pipes:
1.API 5L X52 steel equivalent grades:
DIN 17172  StE 360.7TM, EN10208-2  L360MB
2.API 5L X52 steel chemical composition: Si(max):0.45  C:0.04-0.12 Mn:0.9-1.5  S(max):0.025  P(max):0.0.35  
3. API 5L X52 steel mechanical  properties:
Tensile Strength (MPa) :510-630
Yield Strength (MPa): min 360
Permissible yield point ratio: max 0.85        
4.X52 steel plate/pipes is one mainly of Steel for large diameter pipes.
If you have any problem, please be free to contact us:

Tel : 021 61182423
Phone:13764751831
Fax : 021 61182425
skype : bsteelplate
E-mail : info@katalor.com
Website:http://www.bsteelplate.com/  
www.katalor.com
ROOM 101，NO.16, 6TH BUILDING, 9TH LANE,GUANGYI ROAD,ZHUQIAO  TOWN,PUDONG NEW district,SHANGHAI