Tinplate Specifications

November 20, 2025 Itinbox®

Tin Coating Weight Designation

Type	Designation of Coating Weight		Standard Tinming Volume		Minimum Average Tinning Volume
Equal tin content	GB; CNS; JIS	ASTM	g/m2	1b/BB	g/m2	1b/BB
	1.1/1.1	#10	1.1/1.1	0.05/0.05	0.9/0.9	0.04/0.04
	2.8/2.8	#25	2.8/2.8	0.125/0.125	2.45/2.45	0.11/0.11
	5.6/5.6	#50	5.6/5.6	0.25/0.25	5.05/5.05	0.23/0.23
	8.4/8.4	#75	8.4/8.4	0.375/0.375	7.55/7.55	0.35/0.35
	11.2/11.2	#100	11.2/11.2	0.50/0.50	10.1/10.1	0.45/0.45
Variable tin content	5.6/2.8	#50/25	5.6/2.8	0.25/0.125	5.05/2.45	0.23/0.11
	8.4/2.8	#75/25	8.4/2.8	0.375/0.125	7.55/2.45	0.35/0.11
	8.4/5.6	#75/50	8.4/5.6	0.375/0.25	7.55/5.05	0.35/0.23
	11.2/2.8	#100/25	11.2/2.8	0.50/0.125	10.1/2.45	0.45/0.11
	11.2/5.6	#100/50	11.2/5.6	0.50/0.25	10.1/5.05	0.45/0.23
	11.2/8.4	#100/75	11.2/8.4	0.50/0.375	10.1/7.55	0.45/0.35

1. Indication of differing tin plating quantities on both sides: D-mark and A-mark can be used to distinguish tin plating quantities on both sides according to customer requirements.

A. On the side with higher tin plating quantity, parallel lines are used to indicate the entire surface (A-mark).
B. On the side with lower tin plating, white lines are marked 3mm from the edge (D-mark).

2. For tin content exceeding #100 or below #10, please inquire.

Surface Finish

Finished products	Sign	Category	Description
One cold rolling	B	Polished finish	A glossy surface obtained by subjecting the tin-plated layer to a fusion treatment on a base film with a fine-grained, smooth surface.
One cold rolling	R	Rough surface finish	A glossy surface obtained by subjecting a tin-plated layer to a fusion treatment on a film with a directional grinding stone pattern surface.
One cold rolling	S	Silver surface finish	Apply a molten tin coating to create a glossy surface on film stock with a coarse, misty, non-glossy surface.
One cold rolling	M	Dull surface finish	A matte surface obtained by electroplating tin onto a matte-finished substrate without subsequent annealing.
Double cold rolling	R	Rough surface finish	A glossy surface obtained by subjecting a tin-plated layer to a fusion treatment on a film with a directional grinding stone pattern surface.

Differential Markings

Type	Designation	Differential Markings
Type	Designation	Parallel Lines Heavy Side	Edge line mark light side
DifferentiallyCoated	5.6/2.8(#50/25)	1/2apart	A line is marked on the top side within 3mm of an edge
	8.4/2.8(#75/25)	1apart
	11.2/2.8(#100/25)	1,1/2apart
	8.4/5.6(#75/50)	1-1/2repeat
	11.2/5.6(#100/50)	1,1/2T/2repeat
	11.2/8.4(#100/75)	1,1/2Trepeat

Size

Type	Thicknessmm	Width mm	Lengthmm	Weight T	Diametermm
Sheet	0.14-0.60	457-1016	457-1175	一	一
Coil	0.14-0.60	457-1016	一	Max10.5	406 419 508

Steel Type

Steel Type	Descrip tion
MR	Low residual carbonyl content with excellent corrosion resistance, typically used for general purposes such as containers.
L	Copper, nickel, chromium, molybdenum, and other residual elements are present in extremely low quantities, making it suitable for food containers requiring superior corrosion resistance.
D	Aluminum-deoxidized mild steel, suitable for deep drawing or preventing the occurrence of Luder’s Line.

Temper

Designation		Rockuell HardnessScale(HR-30T)	Appliance
One rolling	T1	49±4	Deep-drawn tanks or nozzles requiring special processing characteristics.
	T2	53±4	Medium-depth deep-drawn cans, such as small square cans and oval cans.
	T2.5	55±4	Hardness between T2 and T3, such as small can bodies or lids.
	T3; T3CA	57±4	Standard empty cans with can lids or crown caps.
	T4CA	61±4	Containers or crown caps requiring slightly higher hardness specifications than T3.
	T5CA	65±4	For large tank bodies or tank lids, and containers with high internal pressure.
Double rolling	DR-8	73±5	Beer and carbonated beverage cans.
	DR-9	76±5	The body or top and bottom covers of large tanks.
	DR-9M	77±5	Lids for beer and carbonated beverages.
	DR-10	80±5	Lids for beer and carbonated beverages.

Note:

(1) Specification CA denotes continuously annealed tinplate, characterized by high hardness, uniform mechanical properties, and superior corrosion resistance, making it ideal for can forming.

(2) DR-8, DR-9, DR-9M, and DR-10 are tinplate sheets rolled to extreme thinness while maintaining strength after undergoing annealing treatment.

(3) Due to the mechanical directionality inherent in continuously annealed and DR tinplate, the rolling direction must be parallel to the circumference of the empty can when used for can body manufacturing.

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Packaging Horizons

Tin Coating Weight Designation

Surface Finish

Differential Markings

Size

Steel Type

Temper

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