Gray Iron Casting  Manufacturers, Traders, Suppliers

The GSL Metallhandelsgesellschaft ltd. is, ever since it’s foundation in 1990, an independent supplier for castings and forgings as well as for semi-finished products according to the customer’s specifications. Additionally to raw parts we deliver completely machined and surface treated (e.g. galvanization, anodization) casting and forging parts on demand.

NINGBO JH Metal Technology Co., Ltd. is located in Ningbo City, Yinzhou District, covering an area of 3500 square meters, which has a convenient traffic route, close to the Ningbo International Airport ,the deep-water harbor--Beilun port,and Shanghai and Hangzhou-Ningbo Expressway away The company is a manufacturing enterprise , producing machinery such as stamping parts, metal machined parts.Over the years our company has been committed to metal stamping，machineparts manufacturing and processing, with a wealth of development and manufacturing experience,and we have formed strong technical force,as wellas large-scale production. The company has import and export rights, and about 90% of the products areexported to the United States, Canada, Germany and other countries. The company currently has GB/T19001-2016/ISo 9001:2015, internationalauality manaaement svstem. the company regard the quality as life, with making experienced engineers and specially trained quality control staff check product quality. Adhering to the business development ideas," surviving by good faith, developing by creativity, expanding markets by good service", we sincerely welcome the domestic and international customers as our partners to work together and create brilliant futurel.

DIN EN ISO 50001,DIN EN ISO 9001:2015

Founded in 2010, Henan Golden Sun Precision Casting Co., Ltd. is located in Advanced Manufacturing Development Zone, Yanjin County, Xinxiang City, Henan Province, covering an area of 50,000 square meters, with 200 employees and an annual production capacity of 30,000 tons. The company has two production bases, a provincial high-performance low-stress machine tool castings engineering technology research center, a municipal cast iron alloy engineering technology research center. The company is mainly engaged in the research and development, production and sales of cast iron parts for CNC machine tools, engineering machinery castings, rail transportation castings, industrial robot castings, compressor castings, mining machinery castings, pumps and valves.
The company understands the way of enterprise development, decades as one day, always plowing in the high-end casting segments, with practical action to practice: quality, reputation, innovation, symbiosis, win-win, co-prosperity of the core values of the enterprise. The company is the director unit of China Foundry Association, the rotating chairman unit of China Foundry Association, the director unit of Henan Foundry Association, the member unit of China Foundry Association Machine Tool Casting Branch, China Foundry Industry Education and Training Base, etc. The company has been awarded the "National High-tech Casting Award". Leading Enterprise", "Henan Province Foundry Specialized Leading Enterprise", "China Foundry Industry Thousand Key Backbone Enterprises", "National Science and Technology Small and Medium-sized Enterprises ", "Specialized, Specialized and New Small and Medium-sized Enterprises in Henan Province", "Advanced Enterprise of Green Development in Henan Province", "Demonstration Enterprise of Green Casting in Henan Province", "Henan Province casting and forging industry comprehensive strength of the top 50 enterprises" and many other honorary titles.
The company always adheres to the concept of: focusing on quality, providing customers with high-quality products; focusing on demand, building a comfortable experience for customers; focusing on value, creating value-added services for customers, and constantly carry out service innovation. According to the market and customer demand, the company has built a number of resin sand flexibilization production line, which can produce various grades of gray cast iron parts and ductile iron parts from 300KG to 6000KG, and the products are directly or indirectly exported to the United States, Japan, Germany, Britain, Canada, South Korea, Spain, etc., and have been used for the production of German Dermagit, GROB, Japanese Okuma, Mazak, Murata, South Korea Dean, South Korea Wia, U.S. GE, Saikawa, and other countries. Weiya, GE, Westinghouse Brake, and many other Fortune 500 companies, industry leaders, and domestic head enterprises in niche areas to provide customized products and services.
In order to meet the diversified and individualized needs of customers from different dimensions and realize one-stop purchasing for customers, the company has also built an organic processing workshop with more than 30 sets of processing and testing equipments, such as vertical machining centers, horizontal machining centers, gantry machining centers, CNC gantry milling machines, gantry planers, CNC boring machines, CNC lathes, vertical lathes, drilling machines, wire-cutting machines, large-scale three-coordinate measuring machines (1800x3000x1400mm), and so on. More than 30 sets of processing and testing equipment.
Golden Sun people always insist that quality is the lifeblood of the enterprise, and attach great importance to the construction of management system, which has passed ISO9001:2015 international quality system certification, ISO14001:2015 environmental management system certification, ISO45001:2018 occupational health and safety management system certification, and has passed the TPG certification of American Society for Quality for many consecutive years. In practice, the company has also established 838 quality control process standards from the procurement of raw and auxiliary materials, process development, ingredient production, to testing and processing, packaging and transportation, etc., and strives to leave no doubtful point that may cause quality defects. In order to improve the efficiency of R&D and ensure the world-class quality, the company has also introduced Anycasting software, Huacasting CAE simulation casting software, and LIMS laboratory information management system, which realizes the casting simulation and the tracking and management of the material composition in the whole process from the raw materials into the factory to the finished products out of the warehouse. The chemical analysis laboratory and physical properties testing laboratory established by the company have direct reading spectrometer, carbon and silicon analyzer, metallurgical microscope (inverted/portable), universal material testing machine, high-frequency infrared carbon and sulfur analyzer, nitrogen and oxygen analyzer, high-temperature analyzer for sand, 3D size laser scanner, low-temperature impact tester, nondestructive testing instrument such as ultrasonic, magnetic particle, coloring and so on, and pre-furnace/post-furnace physicochemical analyzer and other equipments.
Customer satisfaction comes from the insight of innovation, enterprise development comes from the pursuit of innovation, the company always takes innovation as the entry point to create value for customers. The company's SiC synthetic cast iron process; nitrogen, niobium micro-alloyed high-strength cast iron process; heat insulation riser process; green metal material molding process; casting ceramic pipe pouring process and liquid iron filtration technology; -50 ℃ low-temperature impact of ductile iron and other technologies and more than 30 patents owned by the company to form the company's core technology group, to ensure that the enterprise's leading edge in the industry competition. The company developed the "high carbon equivalent nitrogen-containing high-end CNC machine tools gray cast iron parts" by the authoritative experts, reached the international leading level, has a strong industry promotion value.
Manufacturing industry is the foundation of the country, the tool of the country, the foundation of a strong country. And the foundry industry is the foundation of the development of the manufacturing industry, is an important guarantee for the innovative development of high-end technology and equipment, the Golden Sun people will always adhere to the innovation for development, green to protect the development of the development of the platform to win the development of the concept, and is willing to collaborate with the eight guests to develop and create value!

CHONGQING UNITED TECHNOLOGY, INC. (CUTI) was founded in 2002, over the past 21 years we have achieved great success in the field of aluminum alloy casting and machining products. Now we are serving several well-known customers in the world such as Polaris, Kawasaki, Parker, PSI, Tuff Torque, etc., with annual turnover of 40 million USD.
CUTI has an engineering team with over 20 years’ experience in the industry. Based on our strong capability and the reliability built up through long-term cooperation, we have also successfully developed and supplied ferrous metal casting, forging, powder metallurgy, MIM and other process types for our customers, providing them with satisfactory services in many aspects such as new supplier development, technical support, quality management, warehousing, etc.
WHY CUTI?
Professional Engineering Team
We have an engineering team with 20 engineers and technicians. Our professional engineering team is involved in the entire project development, providing technical support, establishing efficient and professional communication with customers.
Supplier Quality Management
With 20 years of experience working with global leading companies in various industries, we provide effective quality audits (VDA6.3, IATF16949, ISO9001) and improvements to suppliers to meet customer's requirements, follow APQP - PPAP process for new product development, problem solving in the form of 8D reports, and continuously help suppliers to improve their process control capabilities and quality performance.
Advanced laboratory
Our own laboratory equipped with advanced equipment from Zeiss, Olympus and Mitutoyo, with comprehensive product measuring and testing capabilities. We also established cooperation with third-party testing facilities to monitor product quality in all aspects.
Rapid on-site response
We have set up on-site quality inspectors at our major suppliers to monitor quality performance and production status in real time on a daily basis. Our team can be onsite in the factory within 12 hours after an issue has been identified and begin finding a solution.

SQM was founded in Shanghai in 2014 by Johnny Zhao. What began as a two-person startup has grown into a team of over 50 professionals, collaborating with +45 trusted suppliers across China. In 2024, SQM expanded into Europe with the establishment of SQM GmbH in Germany, strengthening our global presence.
We specialize in high-quality casting and forging components for industries such as agriculture, construction, truck & trailer, automotive, pump & valve, rail transportation, and energy. Our engineering and QC teams ensure technical excellence and strict quality compliance.
SQM is ISO 9001, TS16949, ISO 45001, and ISO 14001 certified, guaranteeing the highest quality, safety, and environmental standards. Trusted by over 130 manufacturers across Europe and North America, our turnover has grown from €17 million in 2023 to €21 million in 2024, reflecting our commitment to precision, reliability, and continuous growth.
Let’s build a long-term partnership—contact us to discuss your project needs today!

9001:2015 / 45001:2018 / 14001:2015