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1. Cold-Rolled
Steel
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| Classification
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Standard
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Characteristics
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Usage
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Class 1
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CSP 1
CSP 1D
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Used for exposed or unexposed parts where bending,
shallow drawing, forming and welding are
involved
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Refrigerator doors
Drums/ Furniture
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Class 2
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CSP 2
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Used for fabricating parts which require drawability
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Automobile oil pans
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Class 3
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CSP 3
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Used for deep drawing parts which require more drawability
than CSP 2
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Roofs, fenders and hoods of automobiles
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CSP 3N
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Known
for non-aging deep-drawing quality, which guarantees
consistent steel properties even after a
long period of time
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CSP 3E
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Used for automobile parts which require more drawability
than CSP 3N
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Quarters and springhouses
of automobiles
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CSP 3X
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Used for automobile parts which require more drawability
than CSP 3E
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Car side panels
Motorcycle fuel tanks
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2. Structural
& Hard Quality Cold-Rolled Steel
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Classification
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Standard
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Characteristics
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Usage
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Structural Quality
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CSP 30
CSP 32
CSP 34
CSP 37
CSP 37P
CSP 58
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Used in structural materials
which do not need drawability but need strength
(The
minimum value of tensile strength is guaranteed.)
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Structural materials for
construction
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Hard Quality
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CSP 1-H
CSP 1-2H
CSP 1-4H
CSP 1-8H
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When
customer makes a request,
strip hardness is guaranteed
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Coated pipes,
motor core
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3. Cold-Rolled
Steel for Porcelain Enameling
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Classification
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Standard
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Characteristics
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Usage
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Porcelain Enameling
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CESP 2-C
CESP 2-D
CESP 2-P
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Manufactured
with extremely low carbon steel to which
titanium and boron are added. Therefore,
this steel has excellent drawability and
the characteristics that ensure the best
adhesion for porcelain enameling and the
elimination of fish scales and pin holes.
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Washers
Bathtubs
Gas ovens
Kitchenware
Exterior materials for construction
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4. High Strength
Steel
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Classification
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Standard
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Characteristics
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Usage
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Commercial
Quality
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CHSP 45C
CHSP 60C
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Adding hardening elements,
such as Nb, Cr and V, to low carbon steel
enhances its strength and yield point.It
has excellent crack resistance and is used
for structural purposes where strength is
needed.
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Seats, rail levers and
parking brakes of automobiles
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Drawing
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CHSP 35R
CHSP 40R
*CHSP 45R
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This is high strength steel
with solid solution hardening elements,
such as phosphate.It is used in automobile
panels for its increased strength.
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Center floors and brackets of automobiles
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Deep Drawing
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CHSP 35E
CHSP 40E
CHSP 45E
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This is ultra-low carbon
steel with special elements added.It has
a high elongation rate and is used in deep
drawing parts of automobile outer panels.
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Outer panels, such as
fenders and hoods
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Low Yield Ratio
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*CHSP 35EB
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In constant temperature,
the steel forms a ferrite matrix grain and
has a lower yield strength ratio than that
of high strength steel.It is used as a strength
enhancing material
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Bake Hardening
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*CHSP 60DP
CHSP80TR
CHSP 100DP
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It has a lower yield ratio
compared with solid solution hardening steel.
Therefore it is used as a strength-enhancing
material which requires drawability.By baking
after press forming, the yield strength
of the steel is heightened and its dent-resistance
is improved.The formability is the same
as CHSP 35E
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Doors and bumpers of automobiles
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| Remark : *Specifications with an asterisk require prior negotiation |
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5.
DBTT by Steel Type
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Classification
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Steel Type
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DBTT by D/R
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Applicability
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Remark
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1.92
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1.80
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1.80 and under
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CR
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35E
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-30
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-50
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-70
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applicable
to all parts
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Steel without B(Boron)
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35S
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-40
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Not measured yet
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applicable to all parts
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Steel without B
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40E
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-50
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-70
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-90
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applicable
to all parts
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Steel with B added
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45E
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-20
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-50
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-60
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Prior consultation is
necessary
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Steel with B added
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