Good toughness. Impact value and carbon steel in detail, gray iron material is more than 10 times.
Strong corrosion resistance. Water corrosion test, ninety days of corrosion is only 1/40 of the steel, gray iron pipe is 1/10. Life is gray iron pipe 2 times, 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, 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.
1, the use of the market environment difference
Stainless steel covers are now widely seen in the market a product, mainly used in pedestrian street, pedestrian street, shopping malls, office buildings around the location.
Cast iron covers are mainly used in the main road, we are driving, often in the middle of the road to see the covers, such covers are generally cast iron covers
2, the difference between raw materials
Stainless steel covers for the production of raw materials for the stainless steel plate, is thunder stainless steel production of stainless steel covers, the need to cut the stainless steel plate cut into the size of the customer requirements for bending, welding and other processes.
The raw material of the cast iron covers is pig iron, which is mainly made by casting pig iron as raw material and directly poured into a well after remelting. This kind of covers are stainless steel is not produced.
3, the difference between the style
The shape of the stainless steel covers is mainly square.
The shape of the cast iron covers is mainly round.
4, advantages and disadvantages
The advantages of stainless steel covers are aesthetically pleasing, simple and quick installation, high anti-theft performance, no corrosion, pitting, corrosion or wear, the highest strength among the three.
The shortcomings of stainless steel covers are mainly bearing weight is limited.
The advantages of cast iron covers are mainly toughness, with high compressive capacity.
Cast iron covers the main shortcomings of the demolition of the inconvenience, anti-theft problem has been unable to completely solve; again covers when the vehicle is prone to beating, sound, noise at night, affecting the lives of residents.