With the continuous increase of automobile exhaust standards,the traditional material HT250,ordinary ductile cast iron and vermicular graphite cast iron can no longer meet the requirements of high performance.In order to improve the service life, heat resistance and impact resistance of exhaust manifold.Liaoning Tengfei foundry develop  

new material High Silicon Ductile Iron to produce exhaust manifolds.

High silicon ductile iron as the preferred material for engine exhaust manifold in the United States,compared with other materials, high silicon ductile iron has many advantages, such as good high temperature strength, thermal fatigue, excellent oxidation resistance.However,It's not easy to produce in Chinese most factories,fortunately,our foundry  has enough experience to produce the High silicon ductile iron exhaust manifold.

If you as a new buyer have plans for exhaust manifolds in China recently,I am sure our valuable experience can provide good help for you,as follow:

The exhaust manifolds rough should have no dirt iron, no air holes, and no through-hole defects.If the surface of the exhaust manifold has extra material,we call it Metallic Projection in the form of fins.Our foundry must polish these parts and do the shot blasting again.

The sand holes and shrinkage are not allowed on the exhaust manifold surface,our foundry will communicate with customer in advance once the exhaust manifold has these issues,most customers will agree to use welding to repair these sand holes.Of course,doesn't include critical surfaces.

We also must clean the burrs on the edge of the machining surface.

In order to avoid rusting of the exhaust manifold during sea transportation,our foundry has strict packaging steps and procedures. After machining,our foundry will use anti-rust oil to protect the finished manifolds,and then separately pack them in plastic bags.

Finally, we will pack the exhaust manifolds into a non fumigated wooden box with a moisture-proof plastic bag.