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How Hard is Ductile Iron Round Square Manhole Cover?

Manhole covers are an indispensable product in our life today, and manhole covers are needed in many places such as residential areas, roads and greening, but many people do not understand it well. I doubt the difficulty. Supports cars and people. let’s find out

Ductile iron manhole covers must meet the hardness requirements for performance to be met, and the appropriate hardness requirements can guarantee the use of ductile iron manhole covers. Relatively high hardness manhole covers are difficult to crack and have increased load-bearing capacity.


The ability of ductile iron manhole covers to deform or crack at low covered area is tested during production depending on the head shape by the total static load method. Coverage dates and load size are different. Hardnesses include Brinell Hardness, Rockwell Hardness, Vickers Hardness and Microhardness and are used to manufacture a variety of manhole covers.

1. Ductile iron manhole covers are relatively cheap in construction cost, resulting in material savings and lower investment. When using a large span and heavy load, the price is lower than cast iron. Theft and breakage can be saved

2. Hot-dip galvanized surface treatment: It has strong anti-corrosion and anti-rust function. Steel mesh gutter cover is connected to the frame by hinges, anti-theft, safe and easy to open.


3. The ductile iron manhole cover has a beautiful appearance, a variety of styles, simple lines and silver appearance, even if used on the road, it will not affect the overall use effect.

4. We have many types of Ductile Iron Manhole Cover, which can meet the needs of different environments, loads, spans and shapes, and also can be customized according to the sizes and shapes provided by customers.


5. Good drainage effect, leakage area is 83.3%, more than double that of cast iron.

6.The use of high-strength carbon steel results in high-strength steel gratings for use in long-span, high-load environments such as docks and airports.
Professional custom manhole cover for 20 years, please contact us if you need it.

Post time: Aug-02-2022