4140 Alloy Steel

4140 Alloy Steel

4140 Alloy Steel Custom Gear Investment Casting Parts Product Description and Process 4140 Alloy Steel Custom Gear Investment Casting Parts Production process: lost wax casting process (investment casting process) Weight range: from 0.01 kilograms to 50 kilograms Heat Treatment Process:...

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4140 Alloy Steel Custom Gear Investment Casting Parts

Product Description and Process

4140 Alloy Steel Custom Gear Investment Casting Parts

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.


What Is an Investment Casting?

Investment casting refers to the ceramics formed around the wax patterns to create a casing for molten metal to be poured. Once the wax models are created, they are melted onto a gate system, dipped into slurry and sand to form a layered casing, then replaced with the melted metals such as carbon steel, alloy steel, stainless steel, aluminum, copper, and much more.

Investment casting, often referred to as "lost-wax" casting, uses an expendable-mold process to achieve complex forms with exceptional surface qualities. It is a precision casting technique that can achieve exceptional accuracy for products both small and large, in a range of materials.

To create a mold, a wax pattern is dipped into ceramic material. Once the ceramic dries, it is placed in a kiln which hardens the ceramic and causes the wax center to melt and run out. Molten metal is then poured into the now-empty cavity, and once solid, the mold is broken to reveal the final cast metal object.

The process is derived from one of the oldest known metal-forming techniques. There is evidence that humans used it to make cast metal objects since before 4000 BC. Traditional lost-wax techniques, however, have been improved and refined through history to meet the demands of modern industrial production.

Understanding the investment casting process is valuable to understand how it differs from other methods.


Alloy Structural Carbon Steel Grade Standard

China
GB

Germany

France
NF

ISO Standard

Japan
JIS

Britain
BS

America

DIN

W-Nr.

ASTM/AISI

UNS

20Mn2

20Mn6

1.1169

20M5

22Mn6

SMn420

150M19

1320

-

30Mn2

30Mn5

1.1165

32M5

28Mn6

-

150M28

1330

G13300

35Mn2

36Mn5

1.1167

35M5

36Mn6

SMn433

150M36

1335

G13350

40Mn2

-

-

40M5

42Mn6

SMn438

-

1340

G13400

45Mn2

46Mn7

1.0912

45M5

-

SMn443

-

1345

G13450

20Cr

20Cr4

1.7027

18C3

20Cr4

SCr420

527A20

5120

G51200

40Cr

41Cr4

1.7035

42C4

41Cr4

SCr440

530A40
     530M40

5140

G51400

45Cr

-

-

45C4

-

SCr445

-

5145

G51450

50Cr

-

-

50C4

-

-

-

5150

G51500

20CrMo

20CrMo5

1.7264

18CD4

18CrMo4

SCM420

CDS12

4118

G41180

25CrMo

25CrMo4

1.7218

25CD4

-

-

-

-

-

35CrMo
     35CrMoV

34CrMo4

1.7220

35CD4

34CrMo4

SCM435

708A37
     CDS13

4135

G41350

42CrMo

42CrMo4

1.7225

42CD4

42CrMo4

SCM440

708M40

4140

G41400

25Cr2MoVA
     25Cr2Mo1VA

24CrMoV55

1.7733

-

-

-

-

-

-

38CrMo-
     Al

41Cr-
     AlMo7

1.8509

40CAD
     6.12

41Cr
     AlMo7

-

905M39

-

-

20CrNi
     40CrNi
     50CrNi

40NiCr6

1.5711

-

-

-

640M40

3140

G31400

20CrNiMo

21NiCrMo2

1.6523

20NCD2

21NiCr-Mo2

SNCM220

805M20

8620

G86200

40CrNiMo
     45CrNiMoVA

36CrNiMo4

1.6511

40NCD3

-

SNCM439

816M40

4340

G43400


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