【Graphite Electrodes】 Rebar Standard Transition Benefits for Graphite Electrodes

The new national standard for rebar, GB 1499.2-2024, will be officially implemented on September 25, 2024. The main changes are as follows:

Key Changes and Implications of the New GB 1499.2-2024 Standard for Hot-Rolled Ribbed Steel Bars

Ⅰ. Stricter Weight Tolerance Requirements:

1. For 6-12mm diameter steel bars, the allowable deviation is ±5.5%.

2. For 14-20mm diameter steel bars, the allowable deviation is ±4.5%.

3. For 22-50mm diameter steel bars, the allowable deviation is ±3.5%.

4. Implications: This change will require manufacturers to improve their production processes and quality control capabilities.

Ⅱ. Mandatory Ladle Refining for High-Strength Grades:

1. For high-strength steel grades such as HRB500E, HRBF600E, and HRB600, the use of ladle refining is mandatory.

2. Implications: This will lead to an increase in production costs.

Ⅲ. New Fatigue Performance Requirements:

1. Particularly applicable to projects like high-rise buildings and bridges.

2. Implications: Ensures better durability and performance under cyclic loading.

Ⅳ. Updated Sampling and Testing Procedures:

1. Includes the addition of reverse bending tests for "E" grade steel bars.

2. Implications: These changes will improve the accuracy and reliability of quality inspections, but may also increase testing costs for manufacturers.

Expected Impact:

· Short-term: Steel mills may face increased costs (around 20 RMB) and pressure to adjust market inventories.

· Long-term: The new standard will drive the industry towards higher quality development, promoting the advancement and application of higher strength steel products.

Implications for Graphite Electrodes:

Currently, the production of high-strength steel bars in many key domestic steel mills accounts for more than 50% of their output. With the mandatory use of ladle refining for high-strength steel grades like HRB500E, HRBF600E, and HRB600, the demand for UHP400-450 grade Graphite electrodes will be driven.

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