PRECISION CASTING SOLUTIONS
PRECISION CASTING
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Hainan Sehy International Trading Co., Ltd.

We are a professional manufacturer specializing in high-quality customized solutions. We are committed to transforming customers' unique ideas into excellent products.  Through meticulous craftsmanship, scientific and rigorous management, and a customer-oriented service philosophy, we aim to be your most trustworthy partner. Our mission is "Prosper your business, enhance our reputation", achieving mutual growth and a win-win situation with customers.
 One-stop manufacturer & trader with independent factory.
 Integrated industry and trade enterprise for design, production and sales.
 Professional manufacturer with strong export capability. 
Company Products

Featured Products

The main material grades are HT200, HT250, HT300, QT400, QT450, QT500, etc. The products are sold well all over the country and widely used in automotive, electric power, shipbuilding, railway, transportation and other fields.
 
Company Products
Featured Products


We are a professional manufacturer specializing in high-quality customized solutions. We are committed to transforming customers' unique ideas into excellent products.
 
Company Technological
Our Technological Advantages
The company boasts modern production, processing, and testing equipment, along with strong technical 
capabilities and advanced  manufacturing processes, ensuring both high production efficiency and product precision.
Our Services

Services Tailored to You

SEHY is China Automotive Casting Manufacturer for Precision Engine Components

Dedicated customer service team, with quick response within 24 hoursProvide clear product warranty policies and technical support
Committed to establishing long-term cooperative relationships and growing together.
Order      Provide Samples    Dimension Inspection    Drawing Confirmation    Pattern Making    Molding    Machining
Order      Dimension Inspection     Pattern Making     Molding    Machining
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What Our Customers Are Saying About Us

Customer-centered, provide high-quality services throughout the process.

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Cast iron is an iron-carbon alloy renowned for its excellent castability, wear resistance, and vibration damping. It is widely used to produce engine flywheels, exhaust manifolds, pistons, and machinery bases. Common types include gray iron, known for damping and machinability, and ductile iron, such as Ductile Iron 450, which offers higher strength and toughness. The process involves precision sand casting, melting, pouring, controlled cooling, machining, and surface treatment. High-quality cast iron parts deliver durability, thermal stability, and cost-effectiveness, making them essential across commercial vehicles, construction equipment, and industrial machinery. Choosing a reliable foundry ensures consistent quality, accurate dimensions, and long service life.

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Cast iron is an iron-carbon alloy renowned for its excellent castability, wear resistance, and vibration damping. It is widely used to produce engine flywheels, exhaust manifolds, pistons, and machinery bases. Common types include gray iron, known for damping and machinability, and ductile iron, such as Ductile Iron 450, which offers higher strength and toughness. The process involves precision sand casting, melting, pouring, controlled cooling, machining, and surface treatment. High-quality cast iron parts deliver durability, thermal stability, and cost-effectiveness, making them essential across commercial vehicles, construction equipment, and industrial machinery. Choosing a reliable foundry ensures consistent quality, accurate dimensions, and long service life.

The marine exhaust manifold is an essential high-temperature component for marine diesel engines, working under severe conditions of high temperature, vibration and salty humid marine atmosphere. Our manifolds are cast from Si‑Mo ductile iron featuring excellent thermal fatigue and oxidation resistance. We offer two tooling solutions: one‑time tooling for sample orders and permanent tooling for mass production. Each casting goes through stress-relief heat treatment, CNC machining and strict air tightness inspection. Customization is available according to samples, 2D drawings or 3D CAD files. We support small-batch sample orders with preferential prices for larger follow-up orders, providing dependable replacement spare parts for ship engines.

About aftermarket exhaust manifolds for Mitsubishi Fuso trucks. Made of ductile cast iron, they offer excellent heat and crack resistance. Optimized runners cut exhaust backpressure to preserve engine power. Manufactured to OEM standards with leak testing, the manifolds fit directly without modification. They are a cost-effective replacement for Fuso Canter and Super Great models, with custom casting available for global buyers.

Tel/Wechat: +86-15553231983
Whatsapp: +8616658585017
E-mail: sehy@sehymachine.com
Add: 1st Floor, Building 4#, Xindao Street, Yazhou District, Sanya City, Hainan Province (Sanya Yazhou Town Creative Industry Park, Plot A23-4/2) (Centralized Office Area)

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