8620 Alloy Steel

8620 Alloy Steel

8620 Alloy Steel Investment Casting Process Foundry Product Description and Process 8620 Alloy Steel Investment Casting Process Foundry Production process: lost wax casting process (investment casting process) Weight range: from 0.01 kilograms to 50 kilograms Heat Treatment Process: normalizing,...

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8620 Alloy Steel Investment Casting Process Foundry

Product Description and Process

8620 Alloy Steel Investment Casting Process Foundry

Production process: lost wax casting process (investment casting process)

Weight range: from 0.01 kilograms to 50 kilograms

Heat Treatment Process: normalizing, annealing, tempering etc.

Machining process: CNC machine, machining center, lathe, mill machine, drill machine, etc.

Surface treatment process: Paint coating, electrophoretic paint coating, electrogalvanizing coating, black oxide coating, phosphate treatment, powder coating, etc.


Product Material and Uses

Normally produce with ASTM 4140 alloy steel, 4130 alloy steel, 8620 alloy steel, WCB, WCC, LCC Grade and other specified alloy material.

The alloy steel casting products are widely used for Auto-cars, trains, trucks, vehicle components, and mining machinery components, agricultural machinery parts, textile machinery parts, construction machinery parts, etc.


Lost Wax Investment Casting Process

In lost wax investment casting, a sacrificial detailed wax pattern of the desired finished part is created and mounted onto a wax "tree", which includes the metal delivery system (gates and risers). The tree is alternately dipped into a ceramic slurry and sprinkled with stucco material, and is allowed to dry. This process is repeated until a thick shell is created over the wax pattern. The wax pattern is melted out leaving a cavity in the shape of the pattern. The cavity is filled with molten metal. After solidification, the shell is broken away, the gating material removed, and the finished part remains.


Advantages of Investment Casting

INVESTMENT CASTING VS. SAND CASTING

Sand castings are made by creating a negative in a bed of sand to create the cavity for casting. A sand shell creates a rough exterior to castings.

Typical surface finish of sand castings are 250 Ra as cast, and need extensive work afterwards to create a surface finish that is acceptable in most applications. Sand castings can also not hold as tight of tolerances as Investment Castings, and will likely need more machining than an Investment Casting.

Investment casting uses a ceramic mold that can produce a much smoother finish, typically averaging 125 Ra surface finish as cast. Investment castings also greatly reduce the amount of machining that will be required after casting by holding a .005”/inch tolerance for the majority of applications.


Plain Carbon and Low Alloy Steel Investment Cast Compositions

Plain Carbon and Low Alloy Steel Chemistry

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Carbon

Manganese

Silicon

Chromium

Nickel

Molybdenum

Phosphorus

Sulfur

Other

1020 cast  Investment

0.15-

0.25

0.20-0.60

0.20-

0.60

0.25   Max

0.25   Max

0.25   Max

0.04   Max

0.045   Max

Cu   0.25 Max

1045 cast Investment

0.4   -0.5

0.50-0.90

0.20-

0.50

///

0.05   Max

0.06   Max

/

1050 cast  Investment

0.45   -0.55

0.70-1.00

0.20-

1.00

0.25   Max

0.25   Max

0.25   Max

0.04   Max

0.04   Max

Cu   0.25 Max

1095 cast Investment

0.9   -1.03

0.30-0.50

0.20-

1.00

0.25   Max

0.25   Max

0.1   Max

0.04   Max

0.05   Max

Cu   0.25 Max

4130 cast Investment

0.25   -0.35

0.40-0.70

0.20-

0.80

0.8-1.1

0.25   Max

0.15-0.25

0.04   Max

0.04   Max

Cu   0.25 Max

4140 cast Investment

0.35   -0.45

0.75-1.00

0.20-

0.80

0.8-1.1

0.25   Max

0.15-0.25

0.04   Max

0.04   Max

Cu   0.25 Max

4150 cast Investment

0.45   -0.55

0.75-1.00

0.20-

0.80

0.8-1.1

0.25   Max

0.15-0.25

0.04   Max

0.04   Max

/

4340 cast Investment

0.36-0.44

0.6-0.9

0.20-

0.80

0.7-0.9

1.65-2.00

0.2-0.3

0.04   Max

0.04   Max

Cu   0.35 Max

6150 cast Investment

0.45-0.55

0.65-0.95

0.20-

0.80

0.8-1.1

//

0.04   Max

0.04   Max

V   0.15 Min

8620cast Investment

0.15-0.25

0.65-0.95

0.28-

0.80

0.4-0.7

0.4-0.7

0.15-0.25

0.04   Max

0.04   Max

Cu   0.25 Max

8640cast Investment

0.35-0.45

0.7-1.05

0.20-

0.80

0.4-0.6

0.4-0.7

0.15-0.25

0.04   Max

0.04   Max

/

8650 cast Investment

0.45   -0.55

0.7-1.05

0.20-

0.80

0.4-0.6

0.4-0.7

0.15-0.25

0.04   Max

0.04   Max

/


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