| Steel Type
|
Representative composition
|
Characteristics
|
Usage
|
Classification
|
| STS
304
|
18Cr-8Ni
|
It has corrosion resistance, heat resistance, and low temperature strength. It has a good mechanical property. (Used for widest usages)
|
Home tableware, bathtub, indoor pipe, automobile part, building material, chemical industry, vessel part
|
austenite
|
| STS
304L
|
18Cr-9Ni-Low C
|
It is low carbon steel of 304, has excellent intergranular corrosion resistance, and is used for parts that cannot have heat treatment after welding
|
Containers (chemical industry, coal industry, petroleum industry, medicine storage), heat resistance parts
|
austenite
|
| STS
309S
|
22Cr-13Ni
|
It increases Cr and Ni amount more than 304 and decreases C amount for better welding property, and is used a lot for corrosion resistance and heat resistance steel.
|
Tanks for acetic acid and other chemical industry devices, welding wire, exhaust pipe
|
austenite
|
| STS
310S
|
25Cr-20Ni
|
It has the highest Cr ratio, has excellent oxidation resistance, and is used a lot for heat resistance steel
|
Acetic acid tank, chemical industry devices, resistor, incinerator
|
austenite
|
| STS
316
|
18Cr-12Ni-2.5Mo
|
It has excellent corrosion resistance and high temperature hardness
|
Paper manufacturing, chemical fiber, synthetic resins, dye, manufacturing facility for acetic acid, fertilizer, etc., photography industry, food industry, exterior of the buildings near coast
|
austenite
|
| STS
316L
|
18Cr-12Ni-2.5Mo-Low C
|
It has excellent stress removal after welding and resistance against intergranular corrosion after heat treatment. It is used for the parts that are not tempered after welding
|
Fertilizer industry, synthetic textiles industry, paper manufacturing
|
austenite
|
| STS
317
|
18Cr-12Ni-3Mo
|
It increased Mo than 316 to improve acid resistance, and it is suitable for 310S, the highest quality stainless steel, and the environment with a lot of corrosion factors such as harmful gas, etc.
|
Dyeing facility, ink manufacturing facility, chemical industry, vessel, petroleum and chemical storage tank
|
austenite
|
| STS
321
|
18Cr-9Ni-Ti
|
It is the steel type that prevents intergranular corrosion by adding titanium. It is suitable for usage in high temperature and high pressure section of 430 ~ 900°C
|
Chemical factory heat exchanger, Engine turbine and exhaust pipe material, airplane, boiler cover
|
austenite
|
| STS
410
|
13Cr
|
It has good corrosion resistance and machine workability(welding property). It is hardened by heat treatment. It is difficult to endure corrosive environment.
|
General usages, Knife material, Machine parts, Petroleum refining device, bolt, nut
|
martensite
|
| STS
420J1
|
13Cr
|
It has high degree of hardness in quenchine state, and has excellent corrosion resistance
|
Knife, Turbine blade
|
martensite
|
| STS
420J2
|
13Cr
|
It has higher hardness after quenchine than 420J1. It has magnetism.
|
Machine parts, for high hardness usages such as scissors
|
martensite
|
| STS
430
|
18Cr
|
It is inexpensive and has good workability. It has excellent moldability and corrosion resistance. Substitute for austenites
|
Automobile parts, press plates, heater, electric appliances, building, various tanks, home appliances products, computer parts, type 2 western tableware, washer tank
|
ferrite
|
| STS
409L
|
11Cr-2Mo-Low-C
|
It is a Ti containing steel with low carbon, has excellent resistance against acid and heat, has excellent workability, and is inexpensive.
|
Automobile exhaust system parts, heat resistance device parts, Plant facility parts, Freezer Container exterior
|
ferrite
|
| STS
436L
|
18Cr-1Mo-0.3Ti-LCN
|
It is the steel type that improved workability and welding property by lowering C and N from 434 and by adding Ti, Nb, or Zr independently or as compound
|
Building interior and exterior, Vehicle parts, Automobile exhaust gas processing parts, kitchen appliances, hot water, water supplier
|
ferrite
|
