Thailand Imposes Anti-Dumping Duties on China H-Section Steel
Thailand has officially imposed anti-dumping (AD) duties on hot-rolled structural H-section steel imported from China. The measure took effect on November 11, 2025, one day after the government’s announcement, and will remain in force for five years.
The decision follows a comprehensive trade investigation aimed at addressing unfair import pricing and protecting Thailand’s domestic steel industry from market injury.
Duty Rates for Chinese Producers
The Thai Ministry of Commerce confirmed varying duty rates for Chinese exporters.
Maanshan Iron & Steel Co., Ltd. faces a 30.86% duty rate.
Hebei Jinxi Section Steel Co., Ltd. and all other Chinese producers/exporters are subject to a 54.19% rate.
All duties are calculated based on the CIF (Cost, Insurance, and Freight) value, ensuring a standardized approach that reflects total import cost at the Thai border.
Covered Products and HS Codes
The duties apply to hot-rolled structural H-section steel used mainly in construction and infrastructure projects.
Affected products fall under HS codes 7216.33.11.000, 7216.33.19.000, and 7216.33.90.000.
Importers are advised to ensure correct HS code classification to avoid customs delays and compliance risks.
Background of the Investigation
The anti-dumping probe began on November 14, 2024, initiated by Siam Yamato Steel Co., Ltd., a leading Thai steel manufacturer. The company claimed that low-priced Chinese imports were causing material harm to local producers.
After months of reviewing trade data, cost structures, and market conditions, Thai authorities concluded that Chinese exporters had been dumping H-section steel at unfairly low prices. The decision aligns with WTO anti-dumping regulations and global trade standards.
Market Impact and Industry Outlook
Thailand’s construction and infrastructure sectors rely heavily on steel imports. However, the influx of low-cost Chinese steel has pressured domestic prices and profitability.
The new duties are expected to support local producers but may increase input costs for downstream industries, including building and engineering firms. Some construction companies might seek alternative suppliers in Japan, South Korea, or domestic sources to offset rising costs.
In the longer term, analysts expect greater market stability and fairer competition in Thailand’s steel sector.
Compliance Guidance for Importers
Importers and distributors should review their trade documentation and supplier contracts to ensure full compliance with the new AD measures.
All shipments arriving in Thailand after November 10, 2025, will be subject to these duties. Correct valuation and proper declaration are essential to prevent customs issues or penalties.
Businesses are advised to work closely with customs brokers and trade consultants to navigate tariff procedures effectively.
FAQS
1. When do the anti-dumping duties take effect?
The duties took effect on November 11, 2025, and will last for five years.
2. Which Chinese companies are affected?
Maanshan Iron & Steel Co., Ltd. faces a 30.86% duty, while Hebei Jinxi Section Steel Co., Ltd. and others face 54.19%.
3. What products are covered under the measure?
The duties apply to hot-rolled structural H-section steel under HS codes 7216.33.11.000, 7216.33.19.000, and 7216.33.90.000.
4. Why did Thailand impose these duties?
Thailand imposed the duties to counter unfair pricing practices and protect local manufacturers from market injury.
5. How will this affect importers and construction firms?
Importers may face higher costs, while domestic steelmakers are likely to benefit from improved price competitiveness.
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