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Cast iron precision casting SEBON > Cast iron precision casting > Views

Nodular Iron Cast Precision Casting QT550-6

Nodular Iron Cast,Precision Casting QT550-6

Nodular Iron Cast Precision Casting QT550-6

Cast iron is an alloy mainly composed of carbon and silicon in general. Carbon content is of more than 2% of the iron-carbon alloys. Iron of higher carbon content is very crisp, and can not be forged, only steel or cast objects used. The carbon content of Industrial cast iron is generally 2% to 4%. In addition to carbon, the iron also contains 1% to 3% silicon, and manganese, phosphorus, sulfur and other elements. Alloy cast iron also contains nickel, chromium, molybdenum, aluminum, copper, boron, vanadium and other elements. Carbon, silicon are the main element that affect cast microstructure and properties . Divided into gray cast iron, white cast iron, spheroidal cast iron, vermicular cast iron, alloy cast iron.

Chemical composition unit of precision castings QT550-6

Symbol

max

QT550-6

3.4~3.9

2.6~3.0

0.1~0.4

≤0.06

≤0.03

0.025~0.06

0.02~0.04

Mechanical properties of precision castings QT550-6

Symbol

Yield point or proof stress

σb(MPa)

Tensile strength

σ0.2(MPa)

Elongation % min

According to the contract

Transverse Shrinkage

Z/%

Impact Toughness

KU2/J

HBS

QT550-6

≥379

≥550

≥6

187~255

Dimensional Tolerance of precision castings QT550-6

Casting

Dimensions(mm)

＞

25~40

＞

40~63

＞

63~100

＞100~160

＞

160~250

＞

250~400

＞

400~630

＞

630~1000

＞

1000~1600

＞16~2500

Sand Casting

Major unit

0.9

1.0

1.1

1.3

1.4

1.6

1.8

2.0

2.3

2.7

Minor unit

±1.8

2.0

2.2

2.5

2.8

3.1

3.5

4.0

4.5

5.0

Investment Casting

CT7

0.45

0.50

0.55

0.6

0.7

0.8

0.9

1.0

1.1

1.3

Nodular Iron Cast Precision Casting QT550-6 is mainly used in Auto machine manufacturing industries.Henan Sebon Industries Co., LTD is one of the leading casting company in China.We are a manufacturer for precision castings and produce castings for auto,moto,railway and shipping ,including construction machinery castings ,mining machinery castings and engineering machinery castings.We mainly use the two foundry technology ,sodium silicate investment casting process and silicon sol solution casting process.