Tailor-made within the following
||0.17mm to 0.60mm
||600mm to 965mm
|Cut Lengths -
||450mm to 1100mm
Tolerances as per IS 1993 : 2006 (ISO 1111-1 : 1983
Available in batch annealed condition in 4 categories of temper
classification as per IS 1993 : 2006 (ISO
1111-1 : 1983)
||Rockwell Hardness (HR 30T)
|Both Tinplate and TFS are available in
the following finishes:
Stone = 0.45+/-0.1 Micron CLA
MAtt = 1.0+/-0.2 Micron CLA
Single Reduced Electrolytic Tinplate is available
either equally coated or differentially coated in the following grades
Coating Mass (gm/sqm)
Avg Coating Weight (gm/sqm)
Open Top Sanitary Cans (OTSC)
TCIL pioneered the introduction of OTS Tinplate
years ago, and continues to be the domestic source for the entire range of OTS products be
it A10, A12, A2½, No.1 Tall and many others, matching both industry and customers'
specification. Certified by CFTRI, a leading research centre in food technology, TCIL has
emerged to be a major supplier of Tinplates for OTS products, a differentially coated ETP,
available in both Single/Double reduced forms, ideally suited for packaging processed food
like mango pulp, baked beans, pineapple rings, fruits and juices, mushroom, fish, meat,
ISV = 20 micrograms max.
Tin Grain Size = ASTM 9 or less numerically.
Note: Above coating properties
are guaranteed on the heavier coated side.
Tolerances in coating weights are the same as
given for Single Reduced Tinplates.
As per BIS specification (IS 1993:
marking system consists of parallel lines about one mm wide, the distance between the
lines indicating the coating masses. Coating-wise line spacing given on Tinplate sheets is
||25 alternating with 12.5
||37.5 alternating with 12.5
Tin Free Steel
Post-liberalization days have witnessed a boom
especially in the soft drinks and beer markets in India. Backward integration of our TFS
line with the Cold Rolling Mill and TATA STEEL's Hot Strip Mill has given us the advantage
to cater to a wide spectrum of superior quality TFS requirement of the market.
Tin Free Steel is an electrolytic chrome plated
steel consisting of a thin layer of chromium and a layer of chromium oxide deposited on
the steel base which gives it a beautiful, lustrous metallic finish on both sides. TFS
offers outstanding corrosion resistance, lacquer adhesion as well as printability. No
wonder it's an economical and high quality replacement for Tinplate, especially for the
screw and crown cap market. Tin Free Steel (single/double reduced) is available in the
same range of dimensions/ temper/ mechanical properties and oil film.
|Cr in Chromium Oxide
||7 to 22 mg/sq.m/side
||30 to 130 mg/sq.m
Additional features of TFS
Filiform rust resistance - The
filiform rust progressing as a filament externally beneath the enamel from scratches and
similar defects under atmospheric corrosion. TFS has a better under film corrosion
resistance than Electrolytic Tinplate
Sulphur Blackening Resistance -
The metallic chromium in TFS has excellent sulphide resistance property when canning
protein-rich foodstuff. TFS compensates for the expensive sulphur resistant lacquer, which
would have been necessary for ETP
Coating - Unlike ETP, the
coating in TFS is not amphoteric. Alkaline products such as detergents and dispersion
colours can be packed in TFS with advantage.
Reduced Tinplate Sheets
As early as in 1985, TCIL initiated a project to
keep pace with global developments in consultation with some of the leading Can
fabricators to evaluate the suitability of Double Reduced (DR) Tinplate as the packaging
material for 15 kg Cans. TCIL has set up a 2-stand DCR mill backed up by the
state-of-the-art technology obtained from SMS Germany and UEC, USA for the manufacture of
DR Tinplate for the first time in the country.
What are double reduced sheets?
Double Reduced material is normally
thinner but stronger than conventional Single Reduced material. After an initial cold
reduction and annealing instead of temper rolling, the steel is given a second cold
reduction with lubrication, which gives work hardening effect and imparts additional
strength to Double Reduced material.
Today TCIL is also capable of supplying
excellent quality of thin strip DR for Instant Coffee packaging and other OTS products in
the range of 0.17 mm, 0.19 mm and 0.21mm respectively. In fact, DR Tinplate can be a very
cost effective replacement of Single Reduced Tinplate in almost all applications.
Salient Features of DR Tinplate
The salient feature of DR Tinplate is the
combination of higher strength and sufficient ductility, which enables much thinner
Tinplate to be used, compared to Single Reduced Tinplate resulting in Substantial economic
According to the steel chemistry and
annealing process, the second reduction can be between 30% and 40%, thereby producing
strengths upto 700 N/mm2, whereas single reduced material has strength less than 450
Soft Double Reduced Tinplate
Soft DR ETP is Double Reduced (DR48)
material with temper T65+/-3 and all other parameters same as 0.19 mm/0.20 mm Single
Reduced Tinplate It is produced from 2mm HR coil unlike 0.19mm/0.20mm SR material, which
is produced from 1.6mm/1.8mm HR coil. The Soft DR will be available in 0.18mm-0.22mm
thickness with a brighter finish compared to 0.19mm SR. For this added advantage given by
the Soft DR, there is no difference in price vis-à-vis 0.19mm/0.20mm SR.
Reason for introducing Soft DR
TCIL is currently supplying
.19mmxT61/0.20mm spec. ETP to its customers. This spec. is produced from 1.6mm/1.8mm HRC
which is very difficult to procure reason being, yield in making 1.6mm/1.8mm HRC is very
low and does not justify realization from the customer, which invariably leads to poor
compliance in all sizes including 0.19mm/0.20mm T61 made from 1.6mm/1.8mm HRC at our end.
To counter this problem TCIL has developed Soft DR (DR48) produced from 2mm HRC which is
easily available and can be used in place of 0.19mm /0.20mm SR, only difference being its
Temper is T65 which does not have any problem at the customers end for T61 application.
Soft DR is already being used by all
leading fabricators in India and has been a great success with respect to its performance
and compliance at our end.
Scope of Soft DR in Future
In the coming days there is going to be major
problem in supplying .19mm SR tinplate as supply of corresponding 1.6mm/1.8mm HRC raw
material is going to be much more scarce than before. Then Soft DR will be looked upon as
the lifeguard for 0.19mm and 0.20 mm Tinplate. Therefore in the near future the Soft DR is
going to witness its increasing importance and high demand.
Double Reduced (DR) Electrolytic
Tinplates are available in the same range of thickness, width, cut lengths, finish, tin
coating, passivation and oil film as Single Reduced Tinplates. DR Tinplate combines the
advantages of low weight and high strength.
3.5 - 6.5 mg/sq.m of chromium per side
(with 311 treatment) unless otherwise specified.
5 -12 mg./sq.m of DOS (total for both
Double Reduced Tinplates are available in
the following grades:
Properties of Double Reduced Tinplate
||Hardness AIM 30RT
||0.20% proof stress AIM (MPa)
|DR480 (Soft DR)
||65 + 3/- 3
||480 + 70/- 70
||Moderate strength & stiffness
||73 + 3/- 3
||550 + 70/- 70
||High strength & stiffness
||76 + 3/- 3
||620 + 70/- 70
||Maximum strength & stiffness
Baby Food, Milk Powder, Coffee Tins, 15
kg. Oil cans, etc.
DR Tinplate for Oil cans
DR Tinplate is produced for the oil can
size sector in the following sizes, thickness and tempers:
||0.21 mm as against 0.29 mm for Single
Reduced OC Tinplate.
||895 mm x 660 mm, 900 mm x 660 mm, 905
mm x 660 mm for the body and 764 mm x 1015 mm for the top/bottom sizes.
||Compared to Single Reduced Tinplate in
0.28 mm, the yield of 15 kg. Container in DR quality of 0.21 mm thickness will increase by
25% to 27%
||0.20 - 0.30
||A luster surface
provided by a flow-brightened tin coating on a smoothly grindstone finished steel base.
||0.30 - 0.50
surface provided by a flow-brightened tin coating on a steel base characterized by a
directional grindstone pattern.
||Super Stone Finish
||0.50 - 0.70
||0.80 - 1.20
||A luster surface
provided by a flow-brightened tin coating on a coarse dull finish steel base.
||0.80 - 1.20
||A dull surface provided
by an unmelted coating generally on dull finished steel base.