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ASTM599,ASTM A624,JIS G3303,JIS 3315,EN 10203,EN 10202,ISO11940 TINPLATE

  • ASTM599,ASTM A624,JIS G3303,JIS 3315,EN 10203,EN 10202,ISO11940 TINPLATE
  • ASTM599,ASTM A624,JIS G3303,JIS 3315,EN 10203,EN 10202,ISO11940 TINPLATE
  • ASTM599,ASTM A624,JIS G3303,JIS 3315,EN 10203,EN 10202,ISO11940 TINPLATE
  • ASTM599,ASTM A624,JIS G3303,JIS 3315,EN 10203,EN 10202,ISO11940 TINPLATE
  • ASTM599,ASTM A624,JIS G3303,JIS 3315,EN 10203,EN 10202,ISO11940 TINPLATE
  • ASTM599,ASTM A624,JIS G3303,JIS 3315,EN 10203,EN 10202,ISO11940 TINPLATE
  • ASTM599,ASTM A624,JIS G3303,JIS 3315,EN 10203,EN 10202,ISO11940 TINPLATE
  • ASTM599,ASTM A624,JIS G3303,JIS 3315,EN 10203,EN 10202,ISO11940 TINPLATE
  • ASTM599,ASTM A624,JIS G3303,JIS 3315,EN 10203,EN 10202,ISO11940 TINPLATE
Model No.︰-
Brand Name︰-
Country of Origin︰-
Unit Price︰US $ 1000 / MT
Minimum Order︰30 MT
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Product Description
The common knowledge of tinplate,
1. What is tinplate?
 Tinplate, its English abbreviation is SPTE and nicknamed “Ma Kou Tie” in China, refers to cold-rolled low-carbon steel plate or coil with commercial pure tin plated on both sides. It combines the strength and forming ability of steel with anti-corrosiveness, soldering ability and beautiful appearance of tin. Because of its special characters such as anti-corrosiveness, poison-less, high strength and good lengthening ability it is extensively used as packing material for food, beverage, oil, chemicals, coats, paints sprays, crowns and many other daily articles.
2.What is tin free steel?
  Tin free steel is also called “steel plate without tin”, its English abbreviation is TFS. It is a new kind of metal packing material invented to save cost and tin whose resource is limited and very precious and expensive. Comparing with tinplate, tin free steel is cheaper and has better adhesion for coating and painting, but it is not as good as tinplate in anti-corrosiveness and surface appearance. In addition, for the time being, it can only be welded by resistance welding or joining, but can not be welded with solder tin. Now it is mostly used for crowns and cans for storing light-acid foods. Its range of usage keeps on extending in present years.
Tin free steel is still a new product in China. The national standard for tin free steel has not been setup yet. Chinese manufacturers set up their own standards referring to international standards 《ISO11950-1995 for cold-rolled electrolytic chrome/oxidize chromed steel》and Japanese standards 《JISG3315-1987 tin free steel》.

3. Tinplate encyclopedia
The first tin (made of tinplate) used to contain and preserve food from decay was invented by British in 1800. At that time the method to produce tinplate is called “hot dip tin” process. Since 1920s the need for tin and manufacturing of tin have been developing continuously and quickly. Tins were hand-made until 1847 the American invented the first tin making machine. The invention of electric welder greatly increased the efficiency of tin making. Because tin (Sn) is very expensive and the source of tin is precious people began to manufacture tinplate with electrolytic plating process instead of “hot dip tin” process (which is very wasteful of this precious metal). With the increase efficiency of high-speed electric welder (reaching 1000tin/m), tin making technology has been developed tremendously since 1990s. Tin free steel appeared in the middle of 20th century to partially replace the use of tinplate.

4. Guide for Order
.Quality standards
The national standards for tinplate implemented at present is <<GB/T2520-2000 for cold-rolled electrolytic tinplate>> which is equal to <<ISO11949-1995 for cold-rolled electrolytic tinplate>>.
.Steel type of tinplate
Normally there are three steel types, refer to form 1.
Form 1 The chemical composition of steel base
Type Chemical element ( less than %)
C Si Mn S P Cu Ni Cr Mo
D 0.12 .0.030 0.60 0.05 0.020 0.20 0.15 0.10 0.05
L 0.13 .0.030 0.60 0.05 0.015 0.06 0.04 0.06 0.05
MR 0.13 .0.030 0.60 0.05 0.020 0.20 0.20 0.10 0.05
Remark:In Type D, the Al content is normally less than 0.020%
Among three steel types:
Type D is Al stable steel with excellent suitability for deep drawing;
Type L has low content of non-metal impurities and residual elements, for usage requiring high anti-corrosion.
Type MR has low content of non-metal impurities similar to that of Type L but the content of residual elements is not limited so strictly as that of Type L. It is extensively used as base material to produce tinplate for packing of food and other usages.

⑶. Classes of tinplate
There are two classes of tinplate: singled-cold-rolled tinplate and double-cold-reduced tinplate, refers to Form 2 and Form 3 for mechanic characters.
Form 2 mechanic characters of single-cold-rolled tin-plate
class Hardness of different thickness(HR30Tm)
Thickness ≤0.21mm 0.21mm< Thickness ≤0.28mm Thickness >0.28mm

Nominal
value
 

Average
scope
 

Nominal
value

Average
scope
 

Nominal
value

Average
scope
 

TH50+SE 53max ≤53 52max ≤52 51max ≤51
TH52+SE 53 ±4 52 ±4 51 ±4
TH55+SE 56 ±4 55 ±4 54 ±4
TH57+SE 58 ±4 57 ±4 56 ±4
TH61+SE 62 ±4 61 ±4 60 ±4
TH65+SE 65 ±4 65 ±4 64 ±4
Remark:HR30Tm means allowing printing marks on the back of the sample
*On some occasions, temper degrees of JIS standards is used to state the mechanics characters of single-cold-rolled tinplate,the related relationship with HR30T as follows:
Code     Aim hardness(HR30T)
T-1      49±3
T-2      53±3
T-2.5     55±3
T-3      57±3
T-4      61±3
T-5      65±3
T-6      70±3
Form 3 mechanic characters of double-cold- reduced tinplate
Class σ p0.2 average , N/mm 2
Nominal value
 
Average scope
T500+SE 550 480~620
T580+SE 580 510~650
T620+SE 620 550~690
T660+SE 660 590~730
T690+SE 690 6200~760
Remark: with daily check rebound test can be used.
* On some occasions, temper degrees of JIS standards is used to state the mechanic characters of double-cold rolled tinplate,the related relationship with HR30T as follows:
Code   Aim hardness (HR30T)  Aim durability (reference)
                 Rolling direction N/mm2
DR-8      73            56(550)
DR-9      76            63(660)
DR-9M     77             67(660)
DR-10     80             70(690)
⑷. Thickness of tinplate
The tin layer of tinplate is so thin that when calculating the thickness of tinplate it is always neglected and the thickness is actually the thickness of black plate. The thickness of common tin-plate ranges from 0.17mm to 0.55mm, for double cold-reduced tin-plate from 0.14mmto 0.29mm.
⑸.Surface state of tinplate
There are four kinds of surface appearance:
Bright rough  degree 0.13~0.33μm  mark:B
Stone rough  degree0.24~0.69μm  mark:R
Silver rough  degree0.77~1.27μm  mark:S
Dark rough  degree077~1.27μm  mark:M
(Tinplate with dark surface appearance has not been processed by soft melting.)
⑹. Coating weight
The code of coating weight refers to Form 4 and the coating weight tolerance refers to Form 5.
Form 4 code of coating weight and nominal coating weight of tinplate
Code of Coating weight Nominal Coating Weight of tinplate(single face)
g/㎡
Old code Code Quantity of tin-plating Nominal Coating Weight of
Tinplate(single face)
g/㎡
 
Old code
1.0/1.0 1.0/1.0 10#/10# 11.2/11.2 11.2/11.2 100#/100#
1.5/1.5 1.5/1.5   D5.6/2.8 5.6/2.8 50#/25#
2.0/2.0 2.0/2.0   D8.4/2.8 8.4/2.8 75#/25#
2.8/2.8 2.8/2.8 25#/25# D8.4/5.6 8.4/5.6 75#/50#
4.0/4.0 4.0/4.0   D11.2/2.8 11.2/2.8 100#/25#
5.0/5.0 5.0/5.0   D11.2/5.6 11.2/5.6 100#/50#
5.6/5.6 5.6/5.6 50#/50# D11.2/8.4 11.2/8.4 100#/75#
8.4/8.4 8.4/8.4 75#/75#      
Remark: Tinplate with special coating weight other than above mentioned can be provided according to agreement.
For tinplate with differential coating weight on both sides, the marking method will be decided by agreement. If not point out beforehand, the marking will be two parallel dark line on the thicker face.
Form 5 Tolerance of Coating Weight
Scope of coating weight(m)(single side))g/㎡ Tolerance of sample average coating weight to engineering coating weight(single face) g/㎡
1.0≤m<1.5 -0.25
1.5≤m<2.8 -0.30
2.8≤m<4.1 -0.35
4.1≤m<7.6 -0.50
7.6≤m<10.1 -0.65
m≥10.1 -0.90

⑺. Passivation process of tinplate:
In order to stabilize the surface state of tinplate, prevent the increase of oxidized tin formed on the surface, after electrolytic plating, the tinplate coil must undergo a process with electrized or not electrized chemical solvent, which is called passivation process. Except otherwise agreed with customers, cathode passivation process with Na2Cr2O7 solvent is used.
Oiling:
There is a very thin film of oil on the surface of tinplate, which is for the purpose of separating tinplate sheets easily. The oil commonly used is DOS.
Packing:
 Tinplate and tin free steel can be delivered in coil form or sheet form. The weight of the coil generally ranges from 6 tons to 12 tons per coil. The inner diameter of the coil can be either 420mm, 450mm or 508mm. The delivery weight of the coil is theoretically calculated. There is normally a small part of the coil that is not in accordance with the standard of first class product and can not be separated due to continuous production. So it is regulated by national standards that this small part of the coil shall not exceed 10 percent of the total weight of the coil.
 The delivery weight of tinplate, tin free steel in sheet form is also theoretically calculated. For those products planned to be used in a short period and have lower requirement for moisture resistance, simple water-proof packing is used. For those products requiring long-distance transfer and having high requirement for moisture resistance, a steel box packing shall be added.

Specifications︰GB/T1838-95
GB/T2520-2000 for cold-rolled electrolytic tinplate
ISO 11949-1995 for cold-rolled electrolytic tinplate
JIS G7123-2000 Cold-reduced blackplate in coil form for the production of tinplate or electrolytic chromium-chromium oxide-coated steel
JIS G3303
ASTM A 623
ASTM A624
ASTM A599
BS EN10202
DIN EN10203
DIN EN10205

AS 1517-Tinplate and Blackplate
Standard Met︰inplate, thin steel sheet with a coating of tin applied either by dipping in molten metal or by electrolytic deposition; almost all tinplate is now produced by the latter process. Tinplate made by this process is essentially a sandwich in which the central core is strip steel. This core is cleaned in a pickling solution and then fed through tanks containing electrolyte, where tin is deposited on both sides. As the strip passes between high-frequency electric induction coils, it is heated so that the tin coating melts and flows to form a lustrous coat.

Electrolytic Tinplate (ETP) is a thin, cold-rolled carbon steel sheet coated with tin. The steel substrate provides the necessary strength and formability for specialty fabrication. The alloy layer provides the bond between the steel and free tin layer. The free tin layer is not only responsible for the attractive bright finish and ease of solderability but is also non-toxic, a factor of vital importance in food packaging.

Tinplate’s corrosion resistance, light weight and malleability make it ideal for many precision end uses, including food packaging and consumer products. The special properties of tinplate and improved manufacturing technology is allowing for the utilization of tinplate in many new end products.
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