The new version of the national standard for steel rebar GB 1499.2-2024 "steel for reinforced concrete part 2: hot rolled ribbed steel bars" will be officially implemented on September 25, 2024
In the short term, the implementation of the new standard has a marginal impact on the cost of rebar production and trading, but in the long term it reflects the overall guiding ideology of the policy end to improve the quality of domestic products and to promote steel enterprises to the middle and high end of the industrial chain.
I. Major changes in the new standard: quality improvement and process innovation
The implementation of the GB 1499.2-2024 standard has brought about a number of important changes, which are designed to improve the quality of rebar products and bring China's rebar standards in line with international standards. The following are four key changes:
1. The new standard significantly tightens the weight tolerance limits for rebar. Specifically, the allowable deviation for 6-12 mm diameter rebar is ±5.5%, 14-20 mm is +4.5%, and 22-50 mm is +3.5%. This change will directly affect the production accuracy of rebar, requiring manufacturers to improve the level of production processes and quality control capabilities.
2. For high-strength rebar grades such as HRB500E, HRBF600E and HRB600, the new standard mandates the use of ladle refining process. This requirement will significantly improve the quality and performance stability of these high-strength steel bars, and further promote the industry to the direction of high-strength steel development.
3. For specific application scenarios, the new standard introduces fatigue performance requirements. This change will improve the service life and safety of rebar under dynamic loads, especially for bridges, high-rise buildings and other projects with high requirements for fatigue performance.
4. The standard updates sampling methods and testing procedures, including the addition of a reverse bending test for "E" grade rebar. These changes will improve the accuracy and reliability of quality testing, but may also increase the cost of testing for manufacturers.
Second, the impact on production costs
The implementation of the new standard will be conducive to the head of the thread production enterprises to upgrade product quality, increase market competitiveness, but also bring marginal production costs: according to research, the head of the steel production enterprises in line with the new standard product production costs will increase by about 20 yuan / ton.
Third, the market impact
The new standard will promote the development and application of higher strength steel products. For example, 650 MPa ultra-high-strength seismic steel bars may receive more attention. This shift will lead to changes in product mix and market demand, which may favor those steel mills that can produce advanced materials.
As standards are raised, market demand for high-quality rebar will increase. Materials that meet the new standards may command a price premium, which will incentivize companies to improve product quality.
Post time: Jul-16-2024
