2218 2618 2618A Aluminum Forgings Forged Product Parts

• Customization: Available
• Processing Object: Metal
• Molding Style: Hot Forging
• Model NO.: 2218 2618 2618A
• Application: Aviation
• Material: Aluminium
• Heat Treatment: Quenching
• Surface Treatment: Zinc/Chrome Plating, Anodizing
• Forging Tolerance: +/-0.2mm
• Standard: ANSI
• Certification: CE, ISO 9001:2008
• Service: OEM ODM
• Transport Package: Export Standard Wooden Pallet or as Your Requsts
• Specification: According to Customer Requirement
• Trademark: Chalco Aluminum
• Origin: Henan China
• HS Code: 7218100000
• Production Capacity: 5000pieces/Month

Product Description

2218 is suitable for forging piston of aircraft engine and diesel engine, cylinder head of aircraft engine, impeller of jet engine and compressor ring.

2618 is a kind of heat-resistant and deformed aluminium alloy which can be strengthened by heat treatment. Its working temperature can be up to 250 ºC. It is used to manufacture long-term working supersonic aircraft structural parts, such as fuselage and wing skin frame, tail wing, parts and components of low-speed aircraft whose working temperature is not higher than 150 ºC, and parts of jet engine whose working temperature is not higher than 250 ºC.

2618A is an Al-Cu-Mg-Fe-Ni series heat-resistant forging aluminium alloy, which can be strengthened by heat treatment. The chemical composition of the alloy is similar to that of 2A70 alloy, and its properties are similar to that of 2A70 alloy. It has high heat resistance and good cold and hot working performance. The corrosion resistance of the alloy is obviously improved after solution treatment and artificial aging, but there is a tendency of intergranular corrosion. Its weldability is medium and its machinability is good.

2618A aluminium alloy is used to manufacture piston of internal combustion engine and complex forgings working at 200-250 ºC, such as compressor impeller, blower impeller, tire mould, high temperature working parts of aircraft engine, etc.

The Brinell hardness of 2618A alloy forgings is 115HBW under T61 condition.

Chemical Composition of 2218 2618 2618A

Alloy

Si

Fe

Cu

Mn

Mg

Cr

Ni

Zn

Ti

Zr

Others

Al

Each

Total

2218

0.9

1.0

3.5~4.5

0.2

0.2~1.8

0.1

1.7~2.3

0.25

~

~

0.05

0.15

Rest

2618A

0.15~0.25

0.9~1.4

1.8~2.7

0.25

1.2~1.8

~

0.8~1.4

0.15

0.20

~

0.05

0.15

Rest

2618

0.10~0.25

0.9~1.4

1.8~2.7

0.25

1.2~1.8

~

0.8~1.4

0.15

0.2

~

0.05

0.15

Rest

 

Room Temperature Tensile Properties of 2618A Aluminum Alloy Forgings in T61 State
Type	Specs/mm	Direction	Tension strength Rm/MPa	Prescribed plastic elongation strength  Rp0.2/MPa	Elongation A (%)
Die forgings	Thickness≤100		400	310	4
			380	290	4
Flat forging	≤50	Portrait	400	325	7
		Long transverse	380	290	5
		Short transverse	360	290	4
	51-76	Portrait	400	315	7
		Long transverse	380	290	5
		Short transverse	360	290	4
	77--100	Portrait	385	310	7
		Long transverse	365	275	5
		Short transverse	350	270	4
Rolling ring	Thickness≤63	Tangential direction	380	285	6
		Axial direction	380	285	5

When 2618A aluminium alloy is treated by solid solution heat treatment, the heating temperature of solid solution should be strictly controlled. When the temperature reaches the upper limit, the grain size of aluminium alloy will grow easily, and it is close to the dangerous temperature of overheating of aluminium alloy.
The temperature of the cooling medium has an effect on the mechanical properties and hardness of the alloy, and the water temperature should not be higher than 40 ºC during quenching.
2618A aluminium alloy has good technological plasticity under reheating condition. It can be used to manufacture various free forgings and die forgings by hammer forging and hydraulic press. Forging temperature is 450-350 ºC.
 

Type	Alloy	Projected area(m2)Or weight(kg)	Temper	Standard
Free forgings	5 series	≤3000kg	O,F	GBn223     ASTMB247
	2,6,7 series	≤3000kg	T6,T4,O,F
Mould forgings	5 series	≤2.5m2	O,F
	2,6,7 series	≤2.5m2	T6,T4,O,F