"Duplex stainless steels Considerably higher strength and lower thermal expansion compared with austenitic grades. Very high corrosion reststance in chloride-containing solutions and weak organic acids. Used for offshore oil and gas exploration and heat-exchangers. "

TYPE : WELDED & SEAMLESS

GRADE : ASTM A789 S31803
                ASTM A790 S31803

It have used by a related ocean construction require stainless steel grade 304, 316
and supply variety stainless type. Also it is often to use power plant.

A.TP304/L         most commonly used in petroleum refineries, boilers, heat exchangrs, condensers,
                                cooling towers steam exhausts, electric generation plants
B. TP316L, 317L used to handle sulphur, pulp liquor, acid dyestuffs, bleaching solutiong, severe coal
C.TP321            radiant superheaters, boiler tubes, high pressure steam pipes
D.TP310S         best high temperature, environmental-chemical processing, incinerators, furnaces, burners salt pots etc
E. TP347         general refinery piping, heavy duty exhaust systems, manifolds
F. TP904L         pulp and paper industry, chemical process industry.
G. DUPLEX2205 a dual-phase stainless steel whose grain structure is about 45% ferritic and 55% austenitic
H. A516-70         used for gas holders (ball tank)LPG tanks, storage tanks for fuel and othe liquids

Specification and Grade