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Auto Parts Casting Grey Cast Iron Transmission Housing OEM Casting Foundry

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Auto Parts Casting Grey Cast Iron Transmission Housing OEM Casting Foundry

Auto Parts Casting Grey Cast Iron Transmission Housing OEM Casting Foundry
Auto Parts Casting Grey Cast Iron Transmission Housing OEM Casting Foundry Auto Parts Casting Grey Cast Iron Transmission Housing OEM Casting Foundry

Large Image :  Auto Parts Casting Grey Cast Iron Transmission Housing OEM Casting Foundry

Product Details:

Place of Origin: China
Brand Name: non-standard
Certification: ISO9001;TS16949
Model Number: custom-built

Payment & Shipping Terms:

Minimum Order Quantity: 1 Ton
Price: quote according to different drawing technique requirements
Packaging Details: Plywood crate + VCI Anti-Rust Bag
Delivery Time: within 60 days
Payment Terms: T/T, L/C
Supply Ability: 300 Tons every month
Detailed Product Description
Material: HT200; GG20 Process: Green Sand Casting Process
Machining: CNC Machining Surface: Anti-Rust Oil
Used For: Autocar Industry Packing: Crate
High Light:

gray cast iron

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grays casting

Auto Parts Casting Grey Cast Iron Transmission Housing OEM Casting Foundry

 

 

Product Description and Process
 
1.Transmission Housing Part Grey Cast Iron Parts OEM Casting Foundry Sand Castings
 
2. Production process: green sand molding, pre-coated sand molding and resin sand molding which can produce iron castings from 50 gram to 2000 kilograms
 
3. Machining process: CNC machine, machining center, lathe, mill machine, drill machine, etc.
 
4. Surface treatment process: paint coating, electrophoretic coating, electrogalvanizing coating, black oxide coating, phosphate coating, powder coating, etc.
 
Product Material and Uses


1. Normally produce with gray iron HT200, HT250, Ductile Iron 65-45-12, 60-40-18, 80-55-06, 80-60-03, etc.
2. The ductile 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, valves and pump parts, etc.

 

What is the Microstructure of Grey Cast Iron

 

Grey iron has graphite flakes entwined with the rest of the structure. Unhardened grey iron is “fragile” compared to other cast metals. The graphite flakes create areas of weakness in the metal where fractures can begin that will split the metal. This propensity to fracture is why grey iron has low tensile and impact strength. Yet the graphite flakes are what create great wear resistance because as friction occurs the graphite acts as a lubricant. The graphite structure also has great vibration dampening properties because the structure created by the graphite flakes helps cancel out vibrations.

 

Classification of Grey Iron Classes

 

In the United States, the classification for grey iron is usually set using the ASTM International standard A48. ASTM A247 is also commonly used to describe the graphite structure. Grey iron is grouped into classes which correspond with its minimum tensile strength in thousands of pounds per square inch (ksi); (i.e. class 20 grey iron has a minimum tensile strength of 20,000 psi (140 MPa)). Other ASTM standards that deal with gray iron include ASTM A126, ASTM A278, and ASTM A319.

Class 20 grey iron has a ferrite matrix and a high carbon equivalent. Higher strength gray irons, up to class 40, have lower carbon equivalents and a pearlite matrix. To get grey iron above class 40 requires alloying to provide solid solution strengthening. Grey iron can also be heat treated which modifies the matrix giving the cast iron greater strength. Class 80 is the highest class available for grey iron and it makes the iron have high tensile strength but low impact resistance because class 80 parts are more brittle.



  
Properties of ASTM A48 Classes of gray iron

 

Class Tensile
strength (ksi)
Compressive
strength (ksi)
Tensile modulus,
E (Mpsi)
20 22 83 10
30 31 109 14
40 57 140 18
60 62.5 187.5 21

 
 
Properties of SAE J431 grades of gray iron

 

Grade Brinell hardness t/h† Description
G1800 120–187 135 Ferritic-pearlitic
G2500 170–229 135 Pearlitic-ferritic
G3000 187–241 150 Pearlitic
G3500 207–255 165 Pearlitic
G4000 217–269 175 Pearlitic
†t/h = tensile strength/hardness

 
 

 

 

 

Auto Parts Casting Grey Cast Iron Transmission Housing OEM Casting Foundry 0

 
Grey Iron Castings Hardness

 

Gray Iron Grade Hardness Grade

Hardness Range
HB

Metallography
HT100 H145 ≤170 Ferrite
HT150 H175 150~200 Ferrite + Pearlite
HT200 H195 170~220 Pearlite
HT250 H215 190~240 Pearlite
HT300 H235 210~260 Pearlite(Inoculated Cast Iron)
HT350 H255 230~280 Pearlite(Inoculated Cast Iron)

 
 
What is the Composition of Gray Cast Iron?
 
Just like all cast iron parts, the primary component of Grey Iron is going to be the iron (no surprise there, right?). Just like most other cast irons, it also has 2.5–4.0% carbon and 1–3% silicon. If you look at Chart 2 you will notice that the composition of the iron is very close to other common cast parts, but with a little more phosphorus.

 

Iron Family Gray Ductile CGI Malleable White
Carbon 2.5-4.2 3.0-4.0 2.5-4.0 2.2-2.8 1.8-3.6
Silicon 1.0-3.0 1.8-3.0 1.5-3.0 1.2-1.9 0.5-2.0
Manganese 0.15-1.0 0.1-1.0 0.10-1.0 0.15-1.2 0.15-0.8
Sulfur 0.02-0.25 0.01-0.03 0.01-0.03 0.02-0.2 0.02-0.2
Phosphorus 0.02-1.0 0.01-0.1 0.01-0.1 0.02-0.2 0.02-0.2

 

Grey Cast Iron Property and Chemical Composition

Gray Iron Casting, no any standard mentioned the chemistry composition, so we only suggest the following chemistry based on actual production.
 

Grade

Wall Thickness
/mm

C Si Mn

P

S

HT100 3.4~3.9 2.1~2.6 0.5~0.8 0.3 0.15
HT150

<30
30~50
>50

3.3~3.5
3.2~3.5
3.2~3.5

2.0~2.4
1.9~2.3
1.8~2.2

0.5~0.8
0.5~0.8
0.6~0.9

0.2
0.2
0.2

0.12
0.12
0.12

HT200

<30
30~50
>50

3.2~3.5
3.1~3.4
3.0~3.3

1.6~2.0
1.5~1.8
1.4~1.6

1.7~0.9
0.8~1.0
0.8~1.0

0.15
0.15
0.15

0.12
0.12
0.12

HT250

<30
30~50
>50

3.0~3.3
2.9~3.2
2.8~3.1

1.4~1.7
1.3~1.6
1.2~1.5

0.8~1.0
0.9~1.1
1.0~1.2

0.15
0.15
0.15

0.12
0.12
0.12

HT300

<30
30~50
>50

2.9~3.2
2.9~3.2
2.8~3.1

1.4~1.7
1.2~1.5
1.1~1.4

0.8~1.0
0.9~1.1
1.0~1.2

0.15
0.15
0.15

0.10
0.10
0.10

 
 

Contact Details
Zhengzhou Yu-Long Machinery Equipment Co., Ltd.

Contact Person: Mr. James Wang

Tel: +86 13213152686

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