Gray Iron Casting

Ningbo Supreme Machinery Co., Ltd is a professional gray Iron casting manufacturer and supplier in China.

We have been in this line for more than 25 years, products are mainly exported to USA, Australia, Germany, Italy, Japan, South Africa, etc.

What Is Gray Iron casting

The Chemical Composition of Grey Cast Iron

Carbon, silicon and manganese in cast iron are the elements that mediate the texture. Phosphorus is the element used for control. Sulfur is the element that should be restricted. Currently, the chemical composition of grey cast iron is generally ranges from wC=2.7%~3.6%，wSi=1.0%~2.5%，wMn=0.5%~1.3%，wP≤0.3%，wS≤0.15%.

The texture of Grey Cast Iron

Grey cast iron is cast iron formed when both the first stage and the second stage graphitization process are fully performed. Its microstructure is characterized by the distribution of flake graphite on various matrix structures. Due to the different extent of graphitization in the third stage, grey cast iron with three different matrix structures can be obtained:

a) iron wire cast iron; 

b) pearlite grey cast iron; 

c) iron-body pearlite grey cast iron

Advantages of Gray Iron Casting

Property: Gray cast iron has excellent cutting and machining performance, casting performance, magnetic permeability, good wear resistance, high compressive strength but with low toughness, no forgeability, poor weldability.

Gray Iron Casting Application

1. It is used to manufacture some simple castings that only bear light loads, such as covers, trays, oil pans, handwheels, hand frames, bottom plates, handles and ingot molds, blast furnace counterweights in steel processing equipment, heavy steel hammers, etc.

2. Suitable for manufacturing track plates, cylinder liners, pump bodies, valve bodies, gear boxes, gears, scribing plates, machine bed, column, cylinder and piston (steam) oil piston rings, pistons, etc.

3. It is suitable for the manufacture of castings that are subject to high exaggeration stress and require high airtightness, such as heavy machine bed, gears, cams, large engine crankshafts, cylinder blocks, high pressure cylinders, and rolling mill stands.

4. It is used to manufacture large-sized machines such as lathes, punching machines and other heavy machinery, rolling skateboards, rollers, coking columns, cylinder mixer rings, support wheel seats, etc.

GRADES AND SPECIFICATION FOR CAST (GREY) IRON

Production Process

Sand Casting, Automatic Molding, Shell Molding, Green Sand Casting, Resin Sand Casting