Breakthrough in lightweight tin can components, strength maintained, and raw material cost reduced by 15%

Faced with complex tinplate prices and norms on increased low-carbon control, Chinese experts in metal packaging got an important technological breakthrough! A specialized Chinese factory​ based on Foshan, Guangdong Province, announced the successful R&D and mass production of “high-strength lightweight Tin Can Components”!

A partnership with upstream steel mills, this lightweight components uses double-reduced tinplate (DR) and special structural design to result in tin consumption per body component of approx 15% lower than conventional components, but can achieve equivalent body compressive strength and seal performance can provide considerable cost-saving benefits to downstream food, chemical, and tea packing enterprises.

Rising raw material costs = Rise in technological innovation! From 2023 to 2024, although tin prices fell back, the fluctuation of tinplate substrate prices led to raw materials accounting for 60%-70% of the total production cost of tin can components. Industry data indicates that although the average thickness of domestic cans remained at the range of 0.16mm-0.28mm, the thickness of the cans has shifted to the range of 0.12mm-0.15mm according to advanced manufacturers abroad. Compared with these, the thickness of can body brought about more than a 30% higher raw material cost for domestic manufacturers. In this case, “Lightweight” is a powerful way that domestic factories do to control costs!It’s not just a case of “thinner = cheaper = use less material”: DR材 can be made 30% harder and with higher tensile strength through a secondary cold reduction process and a real-world application of this technology saw our 0.20mm thick can body made from DR材 cold-rolled to 0.17mm with no losses in structure coming from stacking and transport,” said the Technical Director of a Chinese tin can factory based in Foshan, “simply decreasing the thickness to 0.17mm creates weak can bodies and weld fractures; the material inside the process is distinguished by a hardness and strength of approximately 30% more than what we might have gotten conventionally.”

Behind The Winning Cost Reduction of 15% in Raw Material

It sounds quite simple, but what the R&D team has come up with is truly a combination of science and mechanics, with cost reductions promised to be gained in three areas:

Changed Base Material: By using high-strength DR材 in 0.12mm-0.15mm, you’re directly consuming less steel per square inch. Some research in the industry has shown that the material removed by thinning the can is theoretically enough for a 20%-plus reduction in materials costs, and the factories we know of are playing it safe with a 15% reduction in mass production.

Redesign of Structure: They changed the angle and orientation of the reinforcing beads on can-ends and used a computer to do it, changing the material consumption in some detailed and interesting ways while remaining structurally rigid through applied mechanical principles.

Adapted Welding Process: Burn-throughs are the main worry with thin materials, and the factory used lasers and other micro-plasma welding processes to reduce the material wasted right at the weld-joint to less than half that seen with traditional resistance welding.

What Come After? Food and Chemical Packaging Take the Plunge

Lightweighting tin can components are extremely cost-effective, with one larger-scale foodcompany being potentially able to save over RMB 100 million a year with a 15% raw material cost reduction overall when looking at its use of roughly 100 million standard three-piece cans a year. The factory is just now looking at first applications with a view to using the technology in the food processing and chemicals sectors, where there are likely to be considerable cost improvements available:

Repackaging of Food: High-temperature sterilised cans for material like tomato paste, cannedmeat: the higher DR strength compensates for lower pressure resistance from the thinning.

Chemical Can Packaging: Paint cans and canisters for chemicals whose weight savings in turn have implications for upfront can-sourcing and also transportation costs.

Premium Packaging: The beauty of the tea and mooncake tins all comes in outward appearance, so the factory thins the metal inside, not out, and replaces its component can-production systems with itself charged with all the “graft” of external cappings of gold and whatnot and probably charges as much or more in the end!

Industry Direction: The Unnecessary Changes from “Manufactur-ic” to Smart Manufacturing

According to an expert from the Metal Container Committee of the China Packaging Federation, every move in this direction is necessary and now a trend. When the girl with the wool finally starts to sample factories making thin-walled tin can components297, the light-would-be sapsucking dogma of belabored total mean weight differences and tallying device statistics is over.

On things such as importing things to Europe and, having stuffed that monster little in there, exporting other things from China back to the EU, environmental policies such as the EU’s current Carbon Border Adjustment Mechanism (CBAM), which will tax imports to offset “carbon footprint pollution” create an obvious driving financial motive for its use. In the next three years, the tin factories of China capable of producing high-strength, thin-wall tin can components295 will be far ahead of the rest of the industry in bringing them to Europe. Basically CBAM, and clever plants such as ORG and CPMC have been rolling out 0.14mm-0.15mm DR mass production, implying China has officially joined the world of gram-weight competition.