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Where is the advantage of ductile iron covers?

Ductile iron covers are mainly made of ductile iron out of the covers, the quality of this well covers the quality of the ball to the problem. Casting commonly used paint is rust-proof asphalt paint, of course, the surface of the ductile iron cover is also treated by spraying rust-proof asphalt paint. Ductile iron covers have an advantage that is due to ductile iron high strength, toughness, making the ductile castings than the same type of gray cast iron cover light 30% left.

Ductile iron covers Features:

Good toughness. Impact value and carbon steel in detail, gray iron material is more than 10 times.

Strong corrosion resistance. Spray corrosion test, ninety days of corrosion is only 1/40 of the steel, gray iron pipe is 1/10. Life is 2 times the gray iron pipe, 5 times the ordinary steel pipe.

Good plasticity. Elongation ≥ 7%, similar to high-carbon steel, and gray iron material elongation is zero.

high strength. Tensile strength ób ≥ 420MPa, yield strength ós ≥ 300MPa, and low carbon steel is the same, three times the gray iron material.

Ductile iron strength and cast steel strength is comparable, ductile iron has a higher yield strength, the yield strength of the lowest 40k, while the yield strength of cast steel is only 36k. In most municipal applications, such as water, salt water, steam, ductile iron corrosion resistance and oxidation resistance are more than cast steel, the main application areas: municipal roads, highways, communications, electricity, water, residential, schools And other parks.

Better anti-theft and security performance:

Ductile iron covers cover the tensile strength and pressure resistance and steel similar, it is also known as cast steel. Compared with the traditional gray cast iron its elongation greatly improved, with good toughness, not easy to damage, with a better than ordinary cast iron cover anti-theft performance, the overall performance is much better than ordinary cast iron covers.

No noise:

As a result of the use of noise to prevent the patent structure, the cover when the car without sound, no longer disturb the people.

Needless to say, ductile iron covers and other covers compared to the quality far beyond.


We are willing to have a dedicated cooperation with all the friends domestic and overseas to create a better future.



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