T/HBJN 0005-2023 Non-painted rare earth low carbon steel wire

Scope

Main technical content: 1. **Steel grade and chemical composition**: The steel grade is named using a method similar to that of YB/T 5294-2009, where the steel wire designation is suffixed with "RE" to indicate the addition of rare earth elements to the low-carbon steel wire for anti-corrosion coating. The chemical composition range maximally reflects the principle of flexibility. It only emphasizes that the low-carbon steel wire for anti-corrosion coating must contain one or more of the rare earth elements La, Ce, and Y. 2. **Corrosion resistance evaluation**: Greater emphasis is placed on the actual corrosion resistance effect, with the corrosion resistance of Q235 steel serving as the benchmark. The evaluation is based on accelerated corrosion test results in the laboratory, and electrochemical testing is encouraged to meet the requirements of scientific data accumulation and innovation research. 3. **Production process and delivery status**: There are no additional restrictions on the production process. Steel can be manufactured using converter or electric arc furnaces, and external refining can be performed as needed to meet the flexibility requirements of steel mills. 4. **Mechanical and process performance**: The tensile properties of the material primarily comply with the requirements of GB 50017, GB 50011, and GB/T 19879, with reference to GB/T 701 standards, aiming to provide structural design and calculation guidance for steel structure designers. 5. **Corrosion resistance**: Corrosion resistance is an important property of rare earth weathering structural steel, which is critical to the service life of the steel. Corrosion resistance requirements are proposed, taking into account the process and equipment conditions of the vast majority of steel mills. A formula for relative corrosion rate is provided. The recommended test method is the 72-hour immersion test weight loss method in TB/T 2375-93, but this is not limited to this corrosion method.

Development Information

Related Standards