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Comparison table by specifications

Item Welding type Stainless steel tank New Hi-Tank Bolting Assembly tank HI TANK(SMC) Concrete Tank
Quality Major materials STS304 STS444 SMC Concrete
Corrosion resistance Corrosion because of welding Good Good Good
Hygiene Inferior(excessive occurrence of rust) Good(molding heat insulating materials in one piece) Good(molding heat insulating materials in one piece)
Heat Insulation Good Good Good
Durability Ordinary Good Good Good
Physical property Tensile strength (Kg/mm2) 64 57 More than 10
Elongation (%) More than 40 More than 30 Less than 10
Specific Gravity 7.93 7.75 1.8
Weight of Body Ordinary Ordinary Light Heavy
Construction Workability Thorough field management is required due to the use of fire or welding Easy construction due to bolting assembly Easy construction due to bolting assembly Difficult to construct concrete for a
Standard construction Height 5M 5M 5M 6M
Days of construction(On a basis of 300 ton) 14 Days 7 Days 7 Days 13days+
Others Drainage structure Inferior(Protruded Structure of the connection device) on the Good (with slope structure on the bottom plate) Good (with slope structure on the bottom plate) Ordinary(For slope structure, concrete constructions is required)


Characteristics and usage of stainless steel according to types STS444
  - Excellent corrosion resistance by adding quantities of molybdenum
  - Excellent resistance to stress cracking
  - Has magnetic properties
  - Main Usage: For large-sized reservoirs

STS316
  - Excellent corrosion resistance compared to STS304
  - Non-magnetic property
  - High hardness property through the manufacturing process
  - Major usage : For tanks in factories, chemical tanks, reservoirs

STS304L
  - Heat treatment solution for welding is not necessary
  - Major usage : For Chemical, facilities, power plant facilities

STS 304
    Excellent workability
    Thermal setting is not possible
    Major usage : For Kitchen utensils

Comparsion of corrosion resistance according to STS types
(the degree of corrosion after submergence in 5% sulfuric acid for 6 hours)

ITEM PI coefficient(Pitting index) Mass loss(G/m3/Hr)
STS304 20.2 28.28
STS304L 20.2 25.05
STS304Ni 21.7 5.9
STS316 25.8 5.9
STS444 26.1 5.7

  • PI coefficient
        It is the digitized degree the influences corrosion resistance through STS additives As the
        PI coefficient rises, the corrosion resistance increases

  • Mass loss
        As the figure lowers, the corrosion resistance increases

  • Chemical ingredients according to STS types
    Item C Si Mn P S Ni Cr Others
    STS #304 ¡Â0.080 ¡Â1.0 ¡Â2.0 ¡Â0.045 ¡Â0.030 8.0 ¡Â0.080 ¡Â0.080
    STS #444