Type
Chief components
Characteristics
application
series
STS
304
18Cr-8Ni
-Most widely used
-Corrosion resistance, heat-resistance,
Good toughness at low-temperature
-Good mechanical properties
-home tableware, bathtub, indoor piping,
auto parts, construction materials,
chemical industry, vessels
Austenite
STS
304L
18Cr-9Ni-Low C
-Low-carbon version of 304
-Strict corrosion resistance
-No heat treatment after welding
-Storage equipment (Chemical, coal,
petro, medicine industries)
-Heat resistance parts
Austenite
STS
309S
22Cr-13Ni
-Good weldability with higher Cr and Ni and lower C compared with 304
-Acetic acid tanks and other chemical plant facilities, welding wire, muffler
Austenite
STS
310S
25Cr-20Ni
-High Cr ratio
-Excellent oxidation resistance and heat resistance
-Acetic acid tanks and chemical plant facilities, incinerators
Austenite
STS
316
18Cr-12Ni-2.5Mo
-Excellent oxidation resistance and heat resistance

-Manufacturing equipment for dyes, paper-making, chemical fiber, synthetic resin, acetic acid, fertilizer, photo industry
-building materials of coastal zone
Austenite
STS
316L
18Cr-12Ni-2.5Mo-Low C
-Stress removed after welding
-Great granular corrosion resistance after heat treatment
-Suitable for use in parts that need not tempering
-Fertilizer industry, Synthetic fiber and paper industry
Austenite
STS
317
18Cr-12Ni-3Mo
-Improves acidresisting properties with Mo higher then 316
-high-grade steel together with 310S
-Suitable for use against poisonous substance
-dyeing facilities, ink-making facilities and petrochemical storage tanks
Austenite
STS
321
18Cr-9Ni-Ti
-Titanium-added steel with high resistance against grain boundary corrosion
-Suitable for use in high temperature in a range from 430~900 degree C.
-Heat exchanger of Chemical plants,
engine turbines, airplane, boiler cover
and expansion joint

 
STS
410
13Cr
-Great corrosion resistance & weldability
-Hardened by heat treatment
-Difficult to endure corrosion environment
-general use, knife material, machinery parts, bolts and nuts

Martensite

STS
420J1

13Cr
High hardness and corrosion resistance in quenched condition
Knife, Turbineblade

Martensite
STS
420J2

13Cr
After quenching, higher hardness than 420J1
Javing magnetism
Part, high hardness goods of scissors, etc

Martensite
STS
430
18Cr
-Cheap & Good formability
-Great oxidation resistance
-Substitute for austenite series
-Auto parts, heaters, electric appliance, computer parts and various tanks,
washing machines
Ferrite
STS
409L

11Cr-2Mo-Low-C
-Low Carbon, Ti alloy steel
-Great oxidation & heat resistance
-Good formability & cheap

-Automotive exhaust parts ,
heat-resisting equipment, plant facility parts, exterior for freezing container

Ferrite
STS
436L

18Cr-1Mo-0.3Ti-LCN
With less C, N and high Ti, Nb or Zr on 434, stee that improved processability and weldability building materials, Auto parts, Auto parts of gas exhauster kitchen utensils water heater Ferrite