October 29, 2026
Call for industry to support common alloy for beverage can body and ends
Rewritten Summary: China’s Beverage Can Sector Pursues Unified Alloy for Greener Recycling and Lightweighting
China’s aluminium beverage can industry is developing a new aluminium alloy to simplify circular recycling and advance the sector’s green transition, according to Huang Ruiyin, chief researcher at the Chinalco Materials Application Research Institute based in Beijing.
Currently, beverage can bodies are typically made from 3104 alloy while can ends use 5182 alloy — two materials with distinct compositions and properties that complicate closed-loop recycling. The ongoing research targets a new end alloy with a chemical makeup close to that of can body stock, aiming to enable a single 3104-type alloy for entire cans. Huang noted this design would retain strong service performance, meet recycling requirements, and deliver a lower total societal cost than the existing 5182 alloy, adding that the whole industry chain must collaborate to roll out this “uni-alloy” solution.
Market scale and output
Huang shared 2025 industry data showing continued demand growth in China:
- Global aluminium can stock consumption surpassed 8 million tonnes, including 6 million tonnes of body stock and roughly 2 million tonnes of end and pull-tab stock.
- China produced 2.4 million tonnes of beverage can aluminium alloy last year, with domestic demand accounting for around half: 800,000 tonnes of body stock and 400,000 tonnes of end stock.
- Domestic manufacturers turned out 75 billion can bodies and 150 billion can ends to meet market needs.
Higher scrap use for lower carbon footprint
Raising recycled scrap content is a key pathway to decarbonisation, as remelted scrap consumes only 5% of the energy and generates only 5% of the carbon footprint of primary aluminium ingots. However, this requires alloy formulations with higher impurity tolerance, strict melt quality control, and the development of pre-treatment systems paired with dual-chamber furnace technology.
Elevated scrap input also raises iron (Fe) levels. Huang explained that the ratios of iron, manganese and silicon strongly influence second-phase formation, so the final alloy composition must maximise α-phase fraction to support second-phase fragmentation. Process-wise, dual-chamber furnace melting cuts oxidation loss to below 1%, while inline degassing and filtration keep slag and hydrogen content in check.
Advanced domestic manufacturing capabilities
China’s major canstock producers — Chinalco, Nanshan, Zhongfu, Xiangyu, Hongfa and Yongjie — are generally equipped with state-of-the-art melting and casting facilities, ensuring high melt quality and mature scrap recycling capacity.
- On hot rolling lines, thickness tolerance is within ±20 μm for 5182 alloy and ±10 μm for 3104 alloy. Automatic temperature control limits coil-wide temperature variation to within ±10°C during stable rolling, and some mills deploy online surface inspection systems for real-time quality monitoring.
- On cold rolling lines, mass-flow thickness control keeps deviation within ±3 μm. Standard can body gauge has fallen to 0.240 mm, with export-grade products reaching 0.235 mm.
Lightweighting and performance improvements
Beyond alloy development, the industry is advancing lightweighting through process and design optimisation:
- Better melt quality, tighter thickness tolerance and improved strip profile reduce earing during cupping. Secondary forming of can bottoms creates reinforcing ribs that allow further gauge reduction.
- Beverage end stock has reached 0.208 mm in standard gauge, with some products as thin as 0.203 mm. Revised end profile designs can enable further thinning.
- After baking, the material achieves a yield strength of 330–360 MPa, improving strength retention after the baking process and reducing pressure-resistance degradation.
Industry outlook
Aluminium’s excellent sealing performance, high thermal conductivity and infinite recyclability give it strong competitive edges in metal packaging, with promising growth prospects. He called for joint efforts from upstream and downstream enterprises to continuously drive aluminium packaging toward lightweight and green development.