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1.the degree of tempering


Rolling type Withering degree Hardness range (HR30T) Use
One rolling T1 49±4 Deep-draw cans, cans, etc. that require high flexibility.
T1.5 51±4 Deep-draw cans, cans, etc. that require high flexibility.
T2 53±4 The deep draw of the general degree, the use of tough rice.
T2.5 55±4 General purpose. Both T2 drawability and T3 toughness.
T3 57±4 General purpose. Has a certain degree of toughness.
T3.5 59±4 It has strong toughness and is used for tanks or covers that require materials of between T3 and T4.
T4 61±4 It has strong toughness and is used for can body, upper and lower cover and crown cover.
T5 65±4 For applications requiring excellent buckling resistance, can body and upper and lower covers.
Secondary rolling DR7M 71±5 High-strength food cans, beverage cans and other high-intensity applications.
DR8 73±5 High-strength food cans, beverage cans and other high-intensity applications.
DR8M 73±5 High-strength food cans, beverage can bodies, screw caps and other high-intensity applications.
DR9 76±5 Screw caps and other high strength applications.
DR9M 77±5 Screw caps and other high strength applications.
DR10 80±5 High-strength applications such as pressing open the cover.


Note: Tinplate is used in a wide range of applications. The above table is for reference only.


2.the annealing method

(1) Annealing methods include continuous annealing and box annealing.
  When continuous annealing is specified, the code name "CA" is added after the tempering specification code, such as T4CA;
  When box annealing is specified, the code name "BA" will be added after the specification code specification, such as T1BA.
(2) Annealing code (BA or CA) is not clearly indicated unless otherwise specified.
(3) Soft materials (T1, T2, T2.5, T3 can now provide ultra-low carbon continuous annealing steel (IF steel), the material has excellent comprehensive performance, almost completely replace the original BA material.
  Please consult.


3.Tin plating specification


Tin plating type Nominal tin plating amount (g/㎡) Minimum average tin plating amount (g/㎡) Tin plating quantity
Equal thickness tin plating 1.1/ 1.1 0.90/0.90 10/10
2.8/2.8 2.45/2.45 25/25
5.6/5.6 5.05/5.05 50/50
8.4/8.4 7.55/7.55 75/75
11.2/11.2 10.1/10.1 100/100
Poor tin plating 1.1/2.8 0.90/2.45 10/25
2.8/5.6 2.45/5.05 25/50
2.8/8.4 2.45/7.55 25/75
2.8/11.2 2.45/10.1 25/100
5.6/8.4 5.05/7.55 50/75
5.6/11.2 5.05/10.1 50/100
8.4/11.2 7.55/10.1 75/100



(1) The amount of tin plating is determined according to the end use of the product. Tinplate with high tin plating is used for cans with high corrosion resistance or without coating. Tinplate with low tin plating is used for cans with low corrosion resistance requirements or after painting and printing.

(2) Differential Marking For the tinplate tinplate, in order to clarify the difference in tin plating, a white tinned tinned marking line is drawn on the edge of the strip, which we call “D-Mark”. In general, if the customer does not have special requirements, the marking line must be attached to the side of the thin tin plating amount, and the “tin”; D” is attached to the tin plating mark on the side of the marking line.
Such as:11.2/2.8D 2.8/1.1D

(3) Other forms of differential markings At the request of the customer, some are marking the pattern of a particular pattern on the entire surface. This type of logo is called "A-mark". Its marking line can be attached to a thin tinned surface or a thick tinned surface.
Such as: 11.2A/5.6 2.8A/11.2 Thick tinned products must use the logo (“D” or “A”), the request for cancellation of the mark is not acceptable.


4.Surface roughness specification


Surface specification Code Thickness (Ra value) Target range (μm) Features and Uses
Super glossy BE 0.10-0.20  The brightest surface.
Glossy B 0.20-0.35  Bright surface. General purpose.
Rough surface R1 0.35-0.50  Stone surface. The scars generated in printing and can making are not conspicuous.
Extremely rough R2 0.50-0.70  Rough stone surface.
Matte M 0.70-1.20  Fine sandblasted surface. For crown or DI cans (the tinplate is not reflowed).
Silver glossy S1 0.70-1.20  Fine sandblasted surface. Mainly used in art cans (only for soft melting Ukrainian iron).
Silk surface SA 1.80-3.00  Rough sandblasted surface. Mainly used in art cans (limited to soft melt tinplate).



5.Steel grade


TMBP only lists representative steel grades
Steel grade MR  It has few residual micro-tanning components and has excellent corrosion resistance, and is widely used in general applications.
L  Cu, Ni, Cr, Mo and other residual components are extremely rare, and are used as excellent corrosion-resistant cans.
D  Used for deep drawing or non-aging applications.



(1) Continuously cast aluminum killed steel is used unless otherwise specified.

(2) For other steel grades other than the above, please consult us.


6.Chemical treatment (passivation)


Processing specification Process Use
#311 Processing  Cathodic electrochemical passivation treatment of sodium dichromate  Mainly used for printing purposes, the most widely used.
#300 Processing  Sodium dichromate impregnation passivation treatment  A representative example is a horse mouth lice for DI cans, although it is also used in other uncoated foods (eg, mushrooms, etc.) but rarely.
#71 Processing  Chromic acid cathode electrochemical passivation treatment  It has excellent coating adhesion and is mainly used for printing purposes.



7.Oil type and amount of oil


Oil type Oil quantity
DOS (Dioctyl-Sebacate)  According to the application, the target center value can be 2 mg/㎡, 3 mg/㎡, 6 mg/㎡, or it can be increased or decreased according to the actual situation of the user.



8.Packaging form, Label and Service card



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