BIG Co., Ltd
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BIG Co., Ltd
Specialized in ASTM, ASME, EN/DIN, and GB standard alloy pipes and round bars. Trusted by global clients for over 10 years.
Explore Products
BIG Co., Ltd, located in Beijing, China — just 180km from Xingang Port — is a specialized supplier of high-quality alloy steel products. With over 10 years of experience, we have built strong partnerships with domestic and international clients across industries such as oil & gas, bridge construction, pipeline engineering, and structural steelwork.
Our expertise lies in precision manufacturing and strict quality control, ensuring every product meets ASTM, ASME, EN/DIN, and GB standards. We are committed to delivering reliable, durable, and high-performance alloy steel solutions tailored to your project needs.
We offer a comprehensive range of alloy steel pipes and round bars meeting international standards. All products are manufactured with precision and undergo rigorous quality testing.
Chromium-molybdenum alloy steel pipe ideal for high-stress environments. Commonly used in aerospace and automotive applications.
ASTM Standard
High-strength alloy pipe with excellent toughness and fatigue resistance. Suitable for oil drilling and heavy machinery.
ASTM/ASME
Precision-engineered seamless and welded alloy pipes compliant with ASTM and ASME standards for industrial use.
ASTM/ASME
EN/DIN compliant alloy pipes designed for structural and mechanical applications across Europe and beyond.
EN/DIN
Chinese national standard (GB) alloy pipes widely used in domestic infrastructure and export projects.
GB Standard
High-strength alloy round bar with excellent weldability and machinability. Ideal for shafts and gears.
ASTM/AISI
Precision round bars in various alloy grades, meeting ASTM and AISI specifications for industrial use.
ASTM/AISI
European standard alloy round bars suitable for mechanical engineering and structural applications.
EN/DIN
Chinese GB standard alloy round bars used in construction, machinery, and automotive industries.
GB Standard
Custom machining services including deep-hole drilling, boring, honing, and oil tool fabrication.
Custom ServiceAll products meet ASTM, ASME, EN/DIN, and GB standards with full traceability and certification.
Advanced cold-drawn and seamless production techniques ensure dimensional accuracy and surface finish.
Over a decade of serving clients in oil & gas, construction, and industrial sectors worldwide.
Each batch undergoes rigorous testing for tensile strength, hardness, and chemical composition.
We offer custom sizes, machining, and packaging to meet your project-specific requirements.
Strategic location near Xingang Port ensures fast and secure global shipping.
Alloy steel pipes offer superior strength, corrosion resistance, and performance under high pressure and temperature. Ideal for critical industrial applications.
Published: Apr 27, 2017Proper storage, coating, and handling techniques can extend the life of seamless steel pipes and maintain their structural integrity.
Published: Apr 24, 2017For inquiries, quotes, or technical support, please reach out through the official website.
Email: wen@cn-big.com
Phone: +86 010 5246 1208
Fax: +86 010 5140 6975
Address: Tongzhou District, Beijing, China
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