Cast Iron ASTM A48 Grade 20 25 Gg20 Sae G3000 Grey Iron Casting Foundry

Cast Iron ASTM A48 Grade 20 25 Gg20 Sae G3000 Grey Iron Casting Foundry

Product Description and Process cast iron astm a48 grade 20 25 gg20 sae g3000 grey iron casting foundry Production process: green sand molding, pre-coated sand molding and resin sand molding which can produce iron castings from 50 gram to 2000 kilograms Machining process: CNC machine, machining...

Product Details

Product Description and Process

cast iron astm a48 grade 20 25 gg20 sae g3000 grey iron casting foundry

 

Production process: green sand molding, pre-coated sand molding and resin sand molding which can produce iron castings from 50 gram to 2000 kilograms

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

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

 

Product Material and Uses

Normally produce with gray iron HT200, HT250, ductile iron 65-45-12, 60-40-18, 80-55-06, 80-60-03, etc.

The grey/gray iron casting products are widely used for Auto-cars, trains, trucks, vehicle components, mining machinery components, agricultural machinery parts, textile machinery parts, construction machinery parts, etc.

 

Gray Iron Specifications:

Gray Iron has a dense gray structure and offers excellent machinability. Grades 25, 30, 35 and 40 can fill specific requirements for hardness and wear, and heat treatments can yield even higher mechanical properties. Popular applications for gray iron include diesel and gasoline engine blocks and cylinder liners, and structural machine components where vibration dampening is required.

Specifying Body

Spec. No.

Use

Grade or Class

Min. Tensile Strength (PSI)

Other Requirements

ASTM

A126

Valves, flanges and pipe fittings

A

21000

.15% S. Max.
.75% P Max

B

31000

C

41000

ASTM

A48

Castings intended for general engineering use where strength is a major consideration

25

25000

1. Test bar size shall be related in cooling to the critical section of the casting and so specified.
2. At least two test bars shall be cast and prepared for each casting lot, the lot size being designated.
3. Test bars shall be cast in dry silica sand molds similar to that in which the castings are poured.
4. Tension tests shall be under true axial loading.

30 35

30000 35000

40

40000

 

 

 

 

 

Brinell Hardness

Micro-structure

ASTM SAE

A159 J431

Cast in sand molds for the automobile, truck, tractor, and allied industries

G2500

 

170-229

Ferritic-Pearlitic

G3000

187-241

Pearlitic

G3500

207-255

Pearlitic

G4000

217-269

Pearlitic

ASTM

A278

Pressure containing parts for use up to 650ºF

25

 

Castings for intended use above 450ºF should be stress relieved.

30

35


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