Hengong Precision | 18-670mm Cast Iron Bars (Round/Square/Rectangular)

2026-02-05

About Hengong Precision & Our Cast Iron Bars

Hengong Precision Equipment – Empowering Smarter Manufacturing Since 2012.As a factory-direct China exporter, we specialize in high-quality grey and ductile cast iron bars for global engineering, machining and heavy equipment production.Our cast iron bars range from 18-670mm in diameter, available in round, square, rectangular, semi-circular and custom shapes. We hold ISO 9001 certification, full production traceability and 20+ advanced testing systems to meet global industrial standards.One-stop custom machining (CNC/precision/OEM) and on-time delivery are our core strengths.

Casting Process – The Foundation of Stable Quality

We use advanced continuous casting for all our cast iron bars, ensuring uniform material density and zero internal defects.

Our standard casting process:

Molten iron enters a water-cooled crystallizer through a gate, forming a solidified shell on the surface. The unsolidified core is continuously pulled out by a traction device, with fresh molten iron replenishing the system until the billet is complete.This process guarantees consistent mechanical properties across the entire bar – critical for precision machining and engineering equipment applications.

Full Grade Range & 18-670mm Custom Sizes

We supply a complete line of grey and ductile cast iron grades, all customizable to your 2D/3D drawings for engineering equipment and custom machining needs.

Grey Cast Iron Bars (Wear Resistance & Machinability)

EN-GJL-200/250/300 | GG20/GG25/GG30 | G1/G2 | FCD200/250/300 Our 18-670mm square grey cast iron bar with full traceability is a great choice for fixed engineering equipment components.

Ductile Cast Iron Bars (High Tensile & Impact Resistance)

EN-GJS-400-18/450-10/500-07/600-03 | GGG40/GGG50/GGG60 | 60-40-18/65-45-12/70-50-05/80-55-06 | FCD400/450/500/600 Our 18-670mm round ductile cast iron bar (ISO 9001 certified) is ideal for high-load machining and heavy-duty equipment parts.

Advantages: continuous cast iron vs. forged steel

Faster machining speeds for improved productivity
Better surface finish
Minimized deburring
Enhanced wear resistance
Weight is 8% lighter
Machining allowance is reduced by 20%-30%
Cutting tool is saved by 45%-60%.
Reduce overall costs by 30%-45%

Quality Assurance – ISO 9001, Traceability & 20+ Testing Systems

Quality is non-negotiable at Hengong Precision. All our cast iron bars meet strict global standards with three core guarantees:

✅ ISO 9001 Certified: Full compliance with international quality management systems for all production stages.

✅ Full Traceability: Each batch has a unique production code – track smelting, casting, testing and shipping data for the entire product lifecycle.

✅ 20+ Advanced Testing Systems: Spectrometry, hardness testing, tensile testing, ultrasonic flaw detection and dimensional measurement before delivery.

Custom Machining Services – One-Stop Solution

We offer in-house precision machining for all cast iron bars, eliminating the need for third-party suppliers and reducing your production costs.Our machining capabilities cover all your needs:

CNC machined components
Precision machined metal parts
OEM machined parts
Custom cast iron bar processing
Custom cutting for 18-670mm cast iron bars

Export & Procurement Terms – Factory Direct & Flexible

As an experienced exporter, we provide hassle-free global procurement with factory-direct pricing and flexible terms:

🔹Lead Time: 14 working days (in-stock)on-time delivery guaranteed.

🔹 Packaging: Seaworthy rust-proof wooden boxes/seaworthy packaging – perfect for ocean shipping.

🔹 Shipping: FOB China ports | CIF/CFR to your nearest port (global coverage).

Get Your Custom Cast Iron Bar Quote Today

Hengong Precision is your reliable partner for 18-670mm cast iron bar for engineering equipment, custom machining and global export.We offer free grade selection consultation, free sample testing and professional technical support for all orders.Contact our team now for a detailed quote – we respond within 24 hours!