What Is Tinplate? A Complete Guide to Tin-Coated Steel for Packaging & Industrial Use

Published on: July 14, 2026
huaxiaometal

Tinplate (tin-coated steel) combines steel strength with tin corrosion resistance. Learn ETP vs HDT, temper grades, coating weights, food safety standards, and 8 industry applications in this complete guide.

Quick Answer: What Is Tinplate?

Tinplate is a thin steel sheet coated with a layer of tin on both surfaces, combining the mechanical strength of steel with the corrosion resistance and food-contact safety of tin. It is the dominant material for food cans, beverage containers, aerosol cans, and chemical packaging worldwide — accounting for 62% of all metal packaging. Manufactured through either electrolytic deposition (ETP) or hot-dip process (HDT), tinplate offers excellent formability, weldability, printability, and a 92% recycling rate that aligns with 2026 PPWR sustainability requirements.

Last updated: July 2026 | Reviewed by Huaxiao Metal Quality Team | ISO 9001 & SGS Certified

See our full tinplate product specifications →

What Is Tinplate? — Encyclopedia Definition

Tinplate (also known as tin-coated steel or tinned steel) is a low-carbon steel sheet coated with a thin layer of pure tin on both surfaces. The tin coating forms a metallurgical bond with the steel substrate through an Fe-Sn intermetallic alloy layer at the interface, creating a composite material that inherits the structural strength and formability of steel while gaining the corrosion resistance, non-toxicity, and aesthetic qualities of tin.

The standard tinplate structure consists of five distinct layers from the interior to the exterior:

Steel base — Low-carbon cold-rolled steel (typically 0.03–0.13% C), providing mechanical strength, ductility, and formability
Fe-Sn alloy layer — Intermetallic compound (FeSn₂) formed during tin coating, typically 0.05–0.15 g/m², creating the bond between steel and tin
Pure tin coating — The primary protective layer, ranging from 1.0 to 11.2 g/m² per side depending on coating class (#25 to #100)
Passive film — Chromate or alternative passivation layer (~5–15 mg/m² Cr), preventing tin oxidation and sulfide staining
Oil film — Thin lubricating layer (~2–8 mg/m² DOS oil), facilitating handling and forming operations

This five-layer architecture gives tinplate its unique combination of properties: steel’s structural integrity for can-making, tin’s electrochemical protection against corrosion, and the passive film’s resistance to atmospheric tarnishing.

ETP vs HDT: Two Manufacturing Methods Compared

Tinplate is produced through two distinct manufacturing processes, each yielding products with different characteristics:

Electrolytic Tinplate (ETP) — The dominant method, accounting for over 95% of global tinplate production. In ETP, the steel strip passes through an electrolytic cell where tin is deposited from a stannous sulfate or stannous chloride bath. The coating weight is precisely controlled (0.5–11.2 g/m² per side), enabling differential coating (different tin weights on each surface — e.g., #100 inside / #25 outside for acidic food cans).

Hot-Dipped Tinplate (HDT) — The traditional method where the steel strip is immersed in molten tin at ~232°C. HDT produces a heavier and less uniform coating (typically 11.2–22.4 g/m² per side), resulting in a distinctive bright spangled surface. HDT is now used primarily for specialty applications requiring maximum corrosion resistance.

Parameter	ETP (Electrolytic Tinplate)	HDT (Hot-Dipped Tinplate)
Coating weight range	0.5–11.2 g/m² per side	11.2–22.4 g/m² per side
Coating uniformity	Excellent — ±5% tolerance	Moderate — ±15% tolerance
Differential coating	Yes — different weight per side	No — same weight both sides
Surface finish options	Bright, Stone, Silver, Matte	Bright spangle only
Cost (per ton, FOB Shanghai)	~$850–1,100	~$1,100–1,350
Global production share	>95%	<5%
Typical applications	Food cans, beverage cans, aerosol, general packaging	Heavy-duty chemical containers, specialty decorative items
Standards	ASTM A624/A624M, EN 10203, JIS G3303	ASTM A626, BS 2956

For detailed BA vs CA annealing differences within ETP, see our BA vs CA Tinplate comparison guide →

6 Core Properties of Tinplate — Why It Dominates Metal Packaging

Tinplate’s market dominance comes from six synergistic properties that no single alternative material can match simultaneously:

Corrosion Resistance — The tin coating acts as a sacrificial barrier. In acidic environments (pH 3–4.5), tin protects steel through electrochemical cathodic protection, preventing iron dissolution and hydrogen swelling in food cans. Coating class #50 provides >2-year shelf life for general food; #75–#100 for acidic fruits and tomato products.
Food Safety — Tin is listed in FDA 21 CFR 175.300 as a safe food-contact metal. Migration limits: Pb ≤0.5 ppm, Cd ≤0.1 ppm, Sn ≤100 ppm (far below toxicity threshold). Modern tinplate uses Cr₃⁺ passivation (PFAS-free), meeting 2026 PPWR requirements for PVC-free, BPA-free, and PFAS-free packaging materials.
Formability — BA tinplate (T1–T5 temper) offers excellent deep-drawing capability for 2-piece cans (DRD/DWI process). CA tinplate (DR8/DR9, TH550–TH660) provides consistent hardness for high-speed 3-piece can welding lines (>200 cans/min). Rockwell HR30T hardness range: 49 (T1) to 73 (T5/DR9).
Weldability — The thin tin coating (≤11.2 g/m²) allows resistance welding (solder side seam) without removing the tin layer. This enables 3-piece can manufacturing at speeds up to 400 cans/min on high-speed welders.
Printability — Tinplate’s smooth surface accepts offset lithography, UV curing, and direct printing with excellent ink adhesion. Bright and Stone finishes provide optimal substrates for 4–6 color commercial printing on can bodies and lids.
Barrier Properties — Steel provides 100% oxygen barrier and 100% light barrier (vs. PET’s 15–20% oxygen transmission and zero light barrier). Tinplate cans achieve 2–5 year shelf life without refrigeration — unmatched by plastic or glass alternatives.

See our tinplate classification and temper grade specifications →

Tinplate Specification Quick Reference Table

Common tinplate specifications ordered by international buyers:

Parameter	Typical Range	Notes
Thickness	0.13–0.50 mm	Food can body: 0.20–0.30 mm; Lid: 0.18–0.22 mm; Aerosol: 0.30–0.40 mm
Width	600–1,200 mm	Standard coil width; slit to customer requirement
Coating class (ASTM)	#25, #50, #75, #100	Nominal tin weight per side: 2.8/5.6/8.4/11.2 g/m²
Temper grade (BA)	T1, T2, T3, T4, T5	HR30T: 49/53/57/61/65 — increasing hardness
Temper grade (CA)	DR8, DR9, TH550, TH620, TH660	DR8=HR30T 63; DR9=HR30T 70; TH550=HR30T 55
Surface finish	Bright, Stone, Silver, Matte	Bright=high gloss for printing; Stone=diffuse gloss; Matte=no gloss for non-printed
Passivation	Cr³⁺ (5–15 mg/m²) or alternative	Cr³⁺ preferred for 2026 PPWR compliance; Cr⁶⁺ prohibited
Oil film	DOS 2–8 mg/m²	Di-octyl sebacate for lubrication during forming

8 Major Application Industries for Tinplate

Tinplate serves eight primary industry sectors, each with specific grade and coating requirements:

Industry	Products	Typical Specs	Market Share
Food Canning	Fruit, vegetable, meat, seafood, pet food cans	T3/T4 BA, #50–#100 differential, Bright/Stone	48%
Beverage	Carbonated drinks, juice, energy drink cans	T2.5/T3 BA, #25–#50, Bright	15%
Aerosol	Deodorant, hair spray, insecticide, paint cans	TH660/DR9, #50, Stone/Matte	10%
Chemical/Industrial	Paint, solvent, grease, oil containers	T4/T5 BA or TH660, #50–#75, Matte	8%
Electronics	Battery cases, component shielding, EMI cans	T3 BA, #25, Bright	5%
Decorative/Gift	Cookie tins, tea boxes, holiday gift containers	T2/T3 BA, #25, Bright + printed	6%
Pharmaceutical	Medicine tubes, ointment containers, cap seals	T3 BA, #50, Bright	4%
EV Battery	Prismatic battery cases, thermal management shells	T4/T5, #50, Matte	4% (growing)

See our full application matrix with grade recommendations →

ASTM, EN, and JIS Standards for Tinplate

Tinplate specifications are governed by three major standard systems. Below is a quick reference for cross-referencing between them:

Attribute	ASTM (US)	EN (EU)	JIS (Japan)
General tinplate spec	A624 / A624M (ETP single-reduced)	EN 10203	JIS G3303 (ETP)
Double-reduced spec	A626 / A626M (DR tinplate)	EN 10203 (DR section)	JIS G3316 (DR tinplate)
Hot-dipped spec	A626 (HDT reference)	—	JIS G3303 Type HDT
Coating class names	#25, #50, #75, #100, #125	E2.8, E5.6, E8.4, E11.2	1.0, 1.5, 2.0, 2.8 (g/m² per side)
Temper designation	T1–T5 (BA); DR8/DR9 (CA)	TH550–TH660 + DR550–DR660	T-1 to T-5; DR-8, DR-9
Hardness test	Rockwell HR30T	Rockwell HR30T	Rockwell HR30T
Food safety	FDA 21 CFR 175.300	EU 1935/2004/EC + LFGB	Japan Food Sanitation Act
Thickness tolerance	±0.01 mm (for ≤0.30 mm)	±8% of nominal	±0.01 mm (for ≤0.30 mm)

For compliance details including 2026 PPWR requirements, see our 2026 Tinplate Compliance Guide →

Where to Source Tinplate — Huaxiao Metal's Supply Advantage

When sourcing tinplate for your production line, the supplier’s quality assurance capabilities are as important as the product specifications. Here’s what Huaxiao Metal provides with every order:

Mill Test Certificate (MTC) per EN 10204 3.1 — documenting chemical composition, mechanical properties, coating weight, temper grade, and surface finish for every coil
SGS third-party inspection — available for order-specific verification of FDA/EU compliance parameters (Pb, Cd, Sn migration testing)
ISO 9001:2015 certified quality management system covering incoming steel inspection, plating process control, and final product testing
Full specification range — BA and CA tinplate in all temper grades (T1–T5, DR8/DR9, TH550–TH660), all coating classes (#25–#100), and all surface finishes (Bright, Stone, Silver, Matte)
Flexible packaging — coils (600–1200 mm width) or sheets (cut to customer dimensions), with VCI anti-corrosion packaging for long-distance shipping
Export experience — 500+ tons delivered to 27 countries since 2018, with established logistics to North America, Europe, Middle East, and Southeast Asia

Frequently Asked Questions

What is tinplate made of?

Tinplate is made of a low-carbon steel sheet (typically 0.03–0.13% carbon) coated with a thin layer of pure tin on both surfaces. The tin coating forms a metallurgical bond with the steel through an Fe-Sn₂ intermetallic alloy layer at the interface. The complete structure consists of 5 layers: steel base → Fe-Sn alloy layer → pure tin coating → chromate passive film → oil film. The steel provides structural strength and formability, while the tin provides corrosion resistance and food-contact safety.

Is tinplate food safe?

Yes, tinplate is food safe and approved by major regulatory bodies worldwide. The FDA lists tin as a safe food-contact metal under 21 CFR 175.300, with strict migration limits: lead ≤0.5 ppm, cadmium ≤0.1 ppm, and tin ≤100 ppm (far below the toxicity threshold of 200+ ppm). The EU regulates tinplate under 1935/2004/EC, and Germany’s LFGB standard applies additional testing. Modern tinplate uses Cr³⁺ passivation (PFAS-free), which is compliant with 2026 PPWR requirements for PVC-free, BPA-free, and PFAS-free packaging.

Can tinplate rust?

Tinplate resists rust through electrochemical cathodic protection — the tin coating is more noble than steel, so it sacrificially protects exposed steel at scratches or edges. In dry atmospheric conditions, tinplate shows no rust for years. In humid or acidic environments, the protection duration depends on coating weight: #25 (2.8 g/m²) lasts ~1–2 years in urban settings; #50 (5.6 g/m²) lasts ~2–4 years; #75 (8.4 g/m²) lasts ~4–7 years in coastal conditions. For acidic food cans, differential coating (#100 inside / #25 outside) plus interior organic lacquer provides >2-year shelf life with zero corrosion.

What thickness of tinplate is used for cans?

The typical tinplate thickness for food cans ranges from 0.20 to 0.30 mm. Specifically: 2-piece DRD/DWI can bodies use 0.20–0.24 mm (T3/T4 temper for deep drawing); 3-piece welded can bodies use 0.25–0.30 mm (DR8/TH550 for high-speed welding); can lids and ends use 0.18–0.22 mm (T4/T5 for easy-open score lines); aerosol cans use 0.30–0.40 mm (TH660 for pressure resistance up to 12 bar). Decorative gift tins use thinner gauges of 0.22–0.28 mm with T2/T3 temper for intricate embossing.

How is tinplate manufactured?

Tinplate is manufactured through a two-step process: (1) Steel base production — hot-rolled steel is cold-rolled to target thickness (0.13–0.50 mm), then annealed (either batch annealing BA or continuous annealing CA) to achieve the desired temper grade. (2) Tin coating application — for ETP (95%+ of global production), the steel strip passes through an electrolytic plating cell where tin is deposited from a stannous sulfate or chloride bath at 0.5–11.2 g/m² per side. For HDT (<5%), the strip is immersed in molten tin at ~232°C, producing heavier coatings of 11.2–22.4 g/m² per side. After plating, the strip receives passivation (Cr³⁺ film), oiling (DOS), and surface finish treatment (melting/reflow for Bright, or controlled cooling for Stone/Matte).

Need a Tinplate Quotation with Full MTC?

Get factory-direct pricing with complete Mill Test Certificate documentation. Our quality team reviews every order to ensure ASTM/EN/JIS specification compliance and FDA/EU food safety standards.