"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

ASTMJISBSDINNOCodeTP304SUS3043059/304S18
3605/304S591.4301
1.4300X5CrNi189
X12CrNi188TP304LSUS304L3603/304S141.4306X2CrNI189TP309SUS309S　　　TP310SUS310S　1.4845X12CrNi2521TP316SUS3163059/316S18
3605/316S591.4401
1.4436X5CrNiMo1810
X5CrNiMo1812TP316LSUS316L3605/316S141.4404X2CrNiMo1810
X2CrNiMo1812TP316HSUS316H3059/316S18
3605/316S59　　-(316Ti)　1.4571X10CrNiMoTi1810TP317SUS3173059/317S16-　TP317LSUS317L3059/317S121.4438　TP321SUS3213059/321S18
3605/321S591.4541X10CrNiTI189TP321HSUS321H3059/321S18
3605/321S59　　TP347
TP348SUS3473059/347S18
3605/347S591.4450X10CrNiNb189TP347H
TP348HSUS347H3059/347S18
3605/347S59　　TP405SUS405　1.4002X7CrA113TP410SUS410TB　1.4000X7Cr13
X7Cr14
X10Cr13
X15Cr13TP409SUS409　1.4512-TP430SUS4303059/430S151.4016X8Cr19TP444SUS444　　　S31803SUS329 J3L　1.4462-S31254-　--