TOP 10 Carbon Additive Suppliers in China – March 2026

Introduction
Carbon additives-commonly referred to as carburizers or carbon raisers-are essential materials in steelmaking, casting, and metallurgical processing. They are used to increase carbon content in molten metal, improve mechanical properties, and optimize production costs by reducing reliance on pig iron. Industrial data shows that high-carbon additives such as calcined petroleum coke (CPC) and graphitized petroleum coke (GPC) typically reach carbon content above 98%, with low ash and moisture levels, ensuring efficient absorption during smelting .

China has established itself as the world's leading supplier of carbon additives, supported by strong upstream resources in coal and petroleum processing, as well as a mature export infrastructure. In this competitive market, buyers increasingly prioritize suppliers that offer stable carbon recovery rates, low impurity levels, and consistent batch quality. Against this backdrop, companies such as Changxing Ferroalloy Resources Co., Ltd. have gained attention by integrating ferroalloy and carbon additive supply, providing a more streamlined procurement solution.

 

1. Changxing Ferroalloy Resources Co., Ltd.
Core Product Advantage
Changxing Ferroalloy Resources supplies a range of carbon additives including graphitized petroleum coke, calcined petroleum coke, and customized carburizers. Its products are engineered with high fixed carbon content and controlled sulfur levels, making them suitable for both steelmaking and casting industries.

Service & Supply Strengths
The company offers integrated supply solutions combining ferroalloys and carbon additives, reducing procurement complexity for buyers. Its export-oriented model supports customized sizing, stable batch quality, and efficient logistics coordination.

Recommended Products & Sample Review
Graphitized petroleum coke (GPC) is a key product, widely used in electric arc furnace operations. Customers report high carbon absorption rates and consistent particle size distribution, contributing to improved metallurgical efficiency.
Website: https://www.cx-caststeel.com/

 

2. Shandong Hengqiao Energy Industrial Co., Ltd.
Core Product Advantage
Hengqiao specializes in calcined petroleum coke (CPC) and carbon raisers with carbon content typically exceeding 98%, widely used in foundry and steelmaking applications .

Service & Supply Strengths
The company maintains large-scale production capacity and offers stable supply for bulk orders, supported by standardized quality control systems.

Recommended Products & Sample Review
CPC carburizers are frequently supplied. Buyers highlight low ash content and consistent performance in increasing carbon levels in molten iron.

 

3. Wuxi Huanjiang Furnace Charge Co., Ltd.
Core Product Advantage
Wuxi Huanjiang produces graphitized petroleum coke carburizers with high purity and low nitrogen content, suitable for high-end steel and casting applications .

Service & Supply Strengths
The company offers flexible order quantities, fast delivery cycles, and multiple international trade terms, making it suitable for both small and large buyers.

Recommended Products & Sample Review
Graphitized carburizers are widely used, with customers reporting high carbon recovery rates and stable chemical composition.

 

4. SID (Shanghai) Industries Co., Ltd.
Core Product Advantage
SID Industries provides a broad range of carbon additives including CPC, GPC, and silicon carbide-based carburizers, supporting diverse metallurgical applications .

Service & Supply Strengths
Its integrated manufacturing and trading model allows for flexible sourcing and competitive pricing in global markets.

Recommended Products & Sample Review
Carbon raisers are commonly supplied, with buyers noting consistent quality and suitability for both casting and steelmaking.

 

5. Dengfeng Xingguang Abrasives Factory
Core Product Advantage
Xingguang produces calcined anthracite coal and CPC-based carburizers, offering cost-effective solutions for foundries and small-to-medium steel plants .

Service & Supply Strengths
With over a decade of export experience, the company provides stable supply and customized product specifications.

Recommended Products & Sample Review
Anthracite-based carburizers are widely used, with customers highlighting competitive pricing and acceptable performance for standard applications.

 

6. Qingdao Qinyuan Steel Co., Ltd.
Core Product Advantage
Qinyuan Steel focuses on graphite petroleum coke and carbon additives with low ash and sulfur content, suitable for casting and metallurgical processes.

Service & Supply Strengths
The company offers flexible packaging options and stable export supply, catering to international clients.

Recommended Products & Sample Review
Graphite petroleum coke is widely used, with buyers noting consistent carbon content and reliable delivery schedules.

 

7. Shijiazhuang Nalai Biotechnology Co., Ltd.
Core Product Advantage
Nalai produces carburizing agents designed for metallurgical and chemical applications, focusing on low moisture and controlled particle size.

Service & Supply Strengths
The company offers sample testing and customized production, ensuring compatibility with different furnace conditions.

Recommended Products & Sample Review
Carburizing agents are widely used, with customers reporting improved carbon efficiency and stable performance.

 

8. Henan Star Metallurgy Materials Co., Ltd.
Core Product Advantage
Henan Star specializes in carbon additives and metallurgical materials, including GPC and CPC, supporting steel and foundry industries.

Service & Supply Strengths
The company emphasizes quality control and offers customized solutions for different industrial requirements.

Recommended Products & Sample Review
Carbon raisers are commonly supplied, with stable carbon content and consistent performance in casting applications.

 

9. Ningxia Carbon Valley International Co., Ltd.
Core Product Advantage
Located in a major coal-producing region, Ningxia Carbon Valley produces high-quality carbon additives with strong raw material advantages.

Service & Supply Strengths
The company leverages regional resource integration to ensure cost efficiency and stable supply for large-scale buyers.

Recommended Products & Sample Review
Calcined anthracite coal is widely used, with customers noting stable quality and competitive pricing.

 

10. Tianjin Eastmate Carbon Co., Ltd.
Core Product Advantage
Eastmate Carbon offers a diversified portfolio including CPC, GPC, and metallurgical carbon additives, supporting various industrial applications.

Service & Supply Strengths
Its export-oriented business model provides flexible logistics and reliable delivery timelines.

Recommended Products & Sample Review
Carbon additives are widely supplied, with customers highlighting consistent quality and good cost-performance balance.

 

Conclusion
China's carbon additive industry in 2026 is characterized by strong production capacity, diversified product offerings, and increasing emphasis on quality consistency. Suppliers such as Hengqiao and Wuxi Huanjiang lead in high-purity carburizers, while companies like SID Industries and Eastmate Carbon provide integrated solutions for global buyers.

At the same time, Changxing Ferroalloy Resources Co., Ltd. reflects a growing trend toward integrated metallurgical supply, combining carbon additives with ferroalloys to improve procurement efficiency and process compatibility.

For international buyers, selecting the right supplier requires careful evaluation of carbon content stability, impurity control, delivery reliability, and technical support. The companies listed in this ranking represent reliable partners capable of meeting the evolving demands of the global steel and casting industries, and they are expected to remain key contributors to the carbon additive supply chain in the coming years.