Forward Look at the GB/T 20118-2025 Standard: Compliance Adjustment of 8MM Galvanized Alloy Steel Wire Rope and Industry Opportunities

The 8MM galvanized alloy steel wire rope, as a universal product in the field of metal processing, enjoys a prominent position in infrastructure construction, elevators, wind power auxiliary systems, etc., due to its moderate specifications, excellent anti-corrosion performance, and wide adaptability. Recently, driven by fluctuations in raw material prices, the anticipation of new national standards, and technological upgrades, this product has presented new characteristics in terms of cost structure, performance standards, and market application, becoming a focus category in the industry.
In terms of cost structure, the fluctuation of zinc ingot prices is the core factor affecting the pricing of the 8MM galvanized alloy steel wire rope. According to data, the hot-dip galvanizing process requires 50 to 65 kilograms of zinc ingots for each ton of wire rope production. Every time the zinc price breaks through the 25,000 yuan/ton threshold, the zinc material cost alone for each ton of product increases by 125 to 160 yuan. Currently, the domestic dependence on zinc concentrate is 52.1%, and the reduction in production by international mines and changes in shipping costs may trigger price fluctuations. Coupled with the impact of the联动 price of wire rod raw materials, the profit margin of the industry is further compressed. To cope with the cost pressure, leading enterprises mostly sign long-term contracts to lock in more than 60% of the wire rod usage, or use hedging tools to hedge against zinc price risks. Small and medium-sized enterprises, due to their spot purchasing model, have more significant cost sensitivity.
The technological upgrade focuses on the coating process and structural optimization, promoting the iterative improvement of product performance. Major enterprises have gradually adopted the Galfan (zinc 5% aluminum rare earth alloy) coating process, which has been applied to the 8MM specification. After the salt spray test, the lifespan has exceeded 3,000 hours, and the anti-corrosion performance has increased by 2.3 times compared to traditional galvanized coatings. It can be adapted to humid and light marine environments. Some high-end models have optimized the 8×7 + FC fiber core structure, balancing flexibility and tensile strength. The tensile strength is approaching the 1960 MPa level, and the breaking tensile force has increased by more than 15% compared to ordinary models. They are gradually entering the auxiliary tension cable scenarios of small and medium-sized wind power equipment. The zinc-aluminum-magnesium alloy coating technology developed by Hebei Iron and Steel Group has a "self-healing" function. The 8MM specification products are replacing traditional materials for river management.
At the standard and specification level, the upcoming new national standard GB/T 20118-2025 has become a benchmark for industry adjustment. This standard will officially come into effect on March 1, 2026, integrating multiple old standards and adding 10 new types of steel wire ropes. It clearly stipulates the requirements for the tensile strength level of 2060 MPa and the zinc layer adhesion test. For the 8MM specification, the new standard strengthens the quantitative indicators of twist distance, rope end processing standards, and the uniformity control of zinc layer thickness, forcing enterprises to upgrade their production and testing equipment. Products that do not meet the standards will gradually be eliminated, and the average compliance cost of the industry will increase by about 10%.
The market application presents a differentiated pattern of "stable at the lower end, growth at the higher end". Routine maintenance and supporting procurement in the infrastructure and elevator industries support the basic sales volume, while the incremental demand in the wind power and small-scale marine engineering sectors drive the growth of high-end coating products. Downstream enterprises, to avoid risks, mostly take advantage of the transitional period of the new national standards to prioritize the purchase of compliant products, and at the same time, through long-term agreements, they lock in costs. In the future, with the popularization of digital twin production lines and the application of short-process hydrogen metallurgy technology, 8MM galvanized alloy steel wire ropes will not only improve the consistency of batches but also reduce carbon emissions, further adapting to the lightweight and high-reliability requirements in multiple fields. The industry concentration is expected to continue to increase as standards upgrade.