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Steels

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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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Last Updated on Sunday, 01 December 2013 14:19


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