double seal manhole cover ductile iron manhole cover
Ductile iron Manhole cover is one of the products of ductile iron.
Spherical graphite is obtained from nodular cast iron through
spheroidizing and inoculation treatment, which effectively improves
the mechanical properties of cast iron, especially the plasticity
and toughness, thus obtaining higher strength than carbon steel.
Ductile iron is a kind of high-strength cast iron material
developed in the 1950s. Its comprehensive performance is close to
that of steel. It is precisely based on its excellent performance
that it has been successfully used to cast some parts with complex
stress and high requirements for strength, toughness and wear
resistance. Ductile iron has rapidly developed into a very widely
used cast iron material, second only to gray cast iron. The
so-called "replacing steel with iron" mainly refers to nodular cast
iron.
NAME | SPECIFICATION | UNIT WEIGHT |
4'' DUCTILE
IRON | 840X840X100MM | 63KG/SET |
2 ''
DUCTILE IRON | 710X710X50MM | 43KG/SET |
GRAY IRON | 18''X24'' | 63KG/SET |
GRAY IRON | 15''X20'' | 8KG/SET |