T/CI 017-2021 Rare earth weather-resistant steel highway guardrail

Scope

Scope: This document specifies the terms and definitions, classification and designations, product specifications, processing techniques, technical requirements, test methods, design, construction, and acceptance, inspection rules, as well as marking, packaging, transportation, and storage for highway guardrails made of rare earth weathering steel. This document applies to highway guardrails manufactured using rare earth weathering steel. Main technical content: 3.1 Class I rare earth weathering steel: On the basis of Q235 plain carbon steel in GB/T 700 or Q355 low-alloy high-strength steel in GB/T 1591, by adding a small amount of rare earth elements, a dense and stable oxide protective layer is formed on the metal substrate, which greatly improves the atmospheric corrosion resistance of the steel. 3.2 Class II rare earth weathering steel: On the basis of traditional weathering steel, by adding a small amount of rare earth elements (rare earth elements), the content of alloy elements such as Cu, Cr, and Ni can be appropriately reduced, and a dense and stable oxide protective layer is formed on the metal substrate, ensuring that the atmospheric corrosion resistance of the steel still meets the requirements. 3.3 Highway guardrails made of rare earth weathering steel: A kind of wave-shaped steel guardrails for highways, which are processed and formed using Class I rare earth weathering steel (3.1) and/or Class II rare earth weathering steel (3.2). 4. Classification and designations 5. Product specifications 6. Processing techniques 7. Technical requirements 8. Test methods 9. Design, construction, and quality acceptance 10. Inspection rules 11. Marking, packaging, transportation, and storage

Development Information

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