Grey Iron Casting

Grey iron casting is a widely used metalworking process in which molten grey iron is poured into a mold to create components with specific shapes and properties. Grey iron, named for its characteristic gray-colored fracture surface, owes its appearance to the presence of flake graphite in its microstructure. This graphite provides unique benefits, such as excellent thermal conductivity, vibration damping, and machinability, making grey iron an ideal material for various industrial applications.

We specialize in the production of gray iron castings, delivering high-quality components for industries such as machinery manufacturing, automotive parts, pumps, and valves. With years of expertise and a fully integrated production line, we provide complete solutions from casting to finished components, ensuring reliability and consistency for our global clients.

Key Characteristics:
Product Range

Excellent Vibration Damping – Suitable for heavy-duty machinery and machine tools.
High Machinability – Graphite flakes provide smooth cutting and extended tool life.
Cost-Effective – Combines performance with production efficiency.
Stable Dimensions – Minimal deformation after solidification, ideal for precision parts.
Wear Resistance – Perfect for friction-intensive components like brake drums and guides.

Content:

Pump Bodies & Covers – Designed for water and chemical pumps with excellent wear resistance.
Valve Bodies – Reliable sealing and high pressure resistance for fluid control systems.
Machine Tool Beds – Superior vibration damping for stable machining performance.
Gearbox Housings – Strong and dimensionally accurate for transmission systems.
Automotive Brake Drums & Components – Excellent heat resistance and durability for safe braking.
General Structural Parts – Brackets, bases, housings, customized to customer drawings.

Case Studies

Content:

Grades: EN-GJL-200, EN-GJL-250, EN-GJL-300
Tensile Strength: 200–300 MPa
Compressive Strength: 600–1200 MPa
Hardness (HB): 150–230
Thermal Conductivity: 46–54 W/m·K
Dimensional Tolerance: ISO/GB standards or as per customer request

Gray Iron Material Grades
Country	Standard	Equivalent Grades of Grey Iron (Gray Cast Iron)
ISO	ISO 185	100	150	200	250	300	350	–
China	GB 9439	HT100	HT150	HT200	HT250	HT300	HT350	–
USA	ASTM A48	–	NO.20	NO.30	NO.35	NO.40	NO.50	NO.55
USA	ASTM A48	–	NO.25	NO.30	NO.35	NO.45	NO.50	NO.60
Germany	DIN 1691	GG10	GG15	GG20	GG25	GG30	GG35	GG40
Austria	DIN 1691	GG10	GG15	GG20	GG25	GG30	GG35	GG40
European	EN 1561	EN-GJL-100	EN-GJL-150	EN-GJL-200	EN-GJL-250	EN-GJL-300	EN-GJL-350
Japan	JIS G5501	FC100	FC150	FC200	FC250	FC300	FC350	–
Italy	UNI 5007	G10	G15	G20	G25	G30	G35	–
France	NF A32-101	–	FGL150	FGL200	FGL250	FGL300	FGL350	FGL400
UK	BS 1452	100	150	200	250	300	350	–
India	IS 210	–	FG150	FG200	FG260	FG300	FG350	FG400
Spain	UNF	–	FG15	FG20	FG25	FG30	FG35	–
Belgium	NBN 830-01	FGG10	FGG15	FGG20	FGG25	FGG30	FGG35	FGG40
Australia	AS 1830	–	T150	T220	T260	T300	T350	T400
Sweden	SS 14 01	O110	O115	O120	O125	O130	O135	O140
Norway	NS11 100	SJG100	SJG150	SJG200	SJG250	SJG300	SJG350	–

Capabilities & Facilities

Foundry Capacity

Equipped with medium-frequency induction furnaces, ensuring precise melting and stable composition control.

Molding Solutions

Ability to produce both small and large castings using green sand, resin sand, and shell molding technologies.

Machining Facilities

CNC machining centers, lathes, and milling machines guarantee tight tolerance and high surface quality.

Testing Equipment

Spectrometers, hardness testers, coordinate measuring machines (CMM), and non-destructive testing (NDT) instruments.

Production Scale

Annual capacity of thousands of tons, with flexible batch sizes from prototypes to mass production.

Logistics Support

Professional packaging and international shipping solutions tailored to customer needs.

Quality Assurance

Content:

ISO 9001 certified production system.
Every batch includes full chemical and mechanical property reports.
Support for third-party inspection (SGS, BV, etc.).
Batch traceability and strict internal quality audits.

Applications

Content:

Construction Machinery – Frames, housings, brackets.
Automotive Industry – Brake systems, engine-related castings.
Agricultural Equipment – Housings and transmission parts.
Pumps & Valves – Critical flow control components.
Machine Tools – Beds and structures requiring vibration damping.

Let’s Build Your Next Great Component

Contact Us

Whether you have a complete CAD model or are in the early stages of design, we can provide expert guidance on material selection, process optimization, and design for manufacturability to ensure your project’s success.

Grey Iron Casting