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

Country

Specification

Designation

150

180

200

220

250

260

300

350

India

IS 210 1978

FG

150

--

200

--

250

--

300

350

United Kingdom

BS 1452 1990

Grade

150

180

200

220

250

--

300

350

USA

ANS/ASTM A48-83

Grade

20A

25A

30A

--

35A

40A

45A

50A

Germany

DIN 1691 1985

GG

15

--

20

--

25

--

30

35

France

NFA 32-101-1987

FGL

150

--

200

--

250

--

300

350

Italy

UNI 5007 1969

G

15

--

20

--

25

--

30

35

Japan

JIS G5501 1981

FC

150

--

200

--

250

--

300

250

Russia

GOST 1412 1979

Sch

15

18

20

--

25

--

30

35

International

ISO 185-1988

Grade

150

--

200

--

250

--

300

350

Hardness BHN



136-167


159-194


180-222


202-247

227-278


Production Process

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





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Do you want buy Gray Iron Casting Made in China? Supreme Machinery is definitely your good choice. We are known as one of the most competitive Gray Iron Casting Manufacturers and Suppliers in China. Customers are satisfied with our products and excellent service. We sincerely look forward to becoming your reliable long-term business partner! Any inquiries and problems please feel free to send emails to us and we will reply you soon.
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