All tinplate originates in the steel making furnace, where
the proper chemistry for steel is obtained to meet the
specific needs for the end user. All tin mill products start
their production process in a basic oxygen furnace. This
highly productive process uses a mixture of recycled steel
scrap (25 to 30 percent) and liquid iron (70 to 75 percent)
to make high quality, new steels, including tinplate.
Continuous Casting
Once steel is produced, the
continuous process transforms molten steel into slabs in one
continuous operation. Continuous casting is a highly energy-
and cost-efficient process that produces a slab of excellent
quality and consistency.
Blackplate
Blackplate
is not actually black, but the surface qualities of
blackplate steels are the same as cold-rolled steels that
have not been coated. Blackplate is easily painted or plated
for corrosion protection and appearance and can be easily
bonded and welded. Blackplate is most commonly used for
items such as toys, serving trays, building materials,
household goods, closures and caps.
Electrolytic Tin
Coating
The unique properties of tin provide a
coating on the steel that protects the contents, while
providing the steel with an attractive appearance, corrosion
resistance and ease in bonding, welding and painting. Tin is
applied to both sides of the blackplate coil through an
electrolytic process at speeds up to 2,000 feet per minute.
The thickness of the tin coating (called coating weight) is
dependent upon the end use application. Typical applications
for electrolytic tinplate include food and beverage
containers, paint trays, battery tops and paint, varnish and
aerosol cans.
APPLICATION : Tinplate is
used worldwide in the manufacture of cans for food, beverage
and general line (chemical or technical) products. o
Cans for human food, pet food, beverage o
Specialty and promotional packaging o
Paint cans o Aerosol cans
o MORE
Standard
JP
|
US
|
TW
|
|
JIS G3303
|
ASTM 624/626
|
CNS G3097
|
DIMENSION :
ITEM
|
Thickness
mm
|
Width
mm
|
Length
mm
|
Weight
MT
|
Inside Dia.
mm
|
SHEETS
|
0.15 ~ 0.60
|
700 ~ 970
|
508 ~ 1050
|
|
|
COILS
|
0.15 ~ 0.60
|
700 ~ 970
|
|
5 ~ 12
|
406 / 508
|
STEEL TYPE :
|
Characteristics
|
MR
|
it contains few residual minor constituents and
has a good corrosion resistance so that it is
widely used for each application as containers.
|
L
|
it contains particularly few residual minor
constituents such as Cu, Ni, Cr, Mo, so that it
is suitable for the material of containers
required improved corrosion resistance.
|
R
|
it is aluminum killed steel, so that it is
suitable for the applications which bear deep
drawing or other working that is liable to
produce Lude's lines.
|
TEMPER DESIGNATION :
The temper designation gives a guide to the hardness (and
stiffness) of products. For Single Reduced products, the
softer tempers are normally produced from Batch Annealed
(BA) feed, while the harder tempers are offered only from
Continuous Annealed (CA) feed. Continuous Annealed (CA)
products normally have more consistent mechanical properties
throughout the length of coil than Batch Annealed (BA), due
to the nature of the process involed.
Designation
|
HR-30T Aim
|
Example of Usage
|
Single Reduced
|
T1BA
|
49 ± 3
|
soft for deep drawing
|
T2BA
|
53 ± 3
|
moderate drawing
|
T2.5BA
|
55 ± 3
|
pressings and general cans, available on enquiry
|
T3BA
|
57 ± 3
|
general purpose
|
T4CA
|
61 ± 3
|
moderate forming, fair degree of stiffness
|
T5CA
|
65 ± 3
|
increased stiffness to resist bucking
|
Double Reduced
|
DR-8
|
73 ± 3
|
small diameter round can bodies and ends
|
DR-9
|
76 ± 3
|
large diameter round can bodies and ends
|
DR-9M
|
77 ± 3
|
beer and carbonated beverage ends
|
DR-10
|
80 ± 3
|
beer and carbonated beverage ends
|
Notice : 1. the suffix CA means
Continuous Anneal. The CA tinplate has superior features due
to the greater rigidity, high corrosion resistance and
uniformity of mechanical properties and is idea for speedy
can making. 2. DR : base metal
produced by the double cold reduction process -- the base
metal has received a second major cold reduction following
annealing. Consequently, it offers greater rigidity and
strength than conventional base metal. 3.
Both CA and DR tinplate has the property of mechanical
direction. It is necessary to have the rolling direction of
tinplate parallel with the can circle.
|