Die Casting Aluminium Alloy ADC12:Specification,Application, Properties,etc.

aluminum alloy

ADC12 aluminium alloy is common in die casting industries, with outstanding mechanical properties and better corrosion resistance, is lightweight, reasonable, and has dimensional stability. So, what is aluminium alloy adc12? What’s the aluminium alloy using applications? Reading this article, you can learn more about aluminium alloy adc12.

Table of Contents

What is aluminum adc12?

ADC12 is a Japanese die-casting aluminum alloy grade, also known as No. 12 aluminum material, is an Al-Si-Cu system alloy, aluminum-silicon-copper alloy series ADC12 is one of the most commonly used die-casting alloys, castability and processability are very good, because of its alloy composition is more extensive, so most of the use of recycled aluminum manufacturing, Japan’s implementation of the standard: JIS H 5302-2000 “aluminum alloy die casting”.

ADC12 is equivalent to China’s domestic alloy code YL113. The alloy grade is YZAlSi11Cu3, the implementation of the standard GB/T 15115-2009. the United States alloy grade is 383.

Adc12 Aluminum Alloy Ingredients list

A00 aluminum ingot 15-20%, cooked aluminum 20%, raw aluminum 50-60%, primary silicon: 3-4%, others: 1-2%.

What is the current common grade of die casting aluminum alloys?

The current common grades of die-cast aluminum alloys are the grades under the standard of JIS and ANSI in Japan. For example, Al-Si-Cu series: ADC10, ADC12, Al-Si-Mg series: ADC3.
The corresponding ANSI grades are Al-Si-Cu series: A380, A383, Al-Si-Mg series: A360, while our national standard GB also has corresponding grades: Al-Si-Cu series: YL112, YL113, Al-Si-Mg series: YL101.
The following table is a compilation of the familiar die-casting grade series under each standard.

Alloys Series

GB

China Standard

ANSI

American National Standards Institute

SAE J452

American Society of Automotive Engineers

JIS

Japanese Industrial Standards

DIN

German Institute for Standardization

Al-Si-Mg

YL104

360

309

 

YL101

A360

309

ADC3

AlSi10Mg

Al-Si-Cu

YL112

A380

306

ADC10

AlSi8Cu3

 

YL113

A383

383

ADC12

 

A384

303

ADC12

Al-Si

YL102

A413

305

ADC1

AlSi12

 

C443

304

ADC7

Al-Mg

YL201

518

ADC5

AlMg9

Note: Note: Different Counties standards, Alloy trace element content is not the same, but there is an overlapping range of trace elements, and by adjusting the trace element fraction, can make the substitution. >ANSI standard, the A before the grade, is mainly used to distinguish the iron content. A series iron element fraction is generally 1.3. Without A series, it is generally 2.0. Other elements’ content is the same.

Reference of mechanical properties of common aluminum alloy materials for die casting

Reference on ASTMB85-7

Alloys Grades (=JIS)

Tensile strength

N/m㎡

Yield strength

N/m㎡

Extendibility

%

Shear strength

N/m㎡

Fatigue strength

N/m㎡

G8A(ADC5)

308.7

191.1

5

196

138.18

S12A(ADC4)

289.1

131.32

3.5

171.5

131.32

SG100A(ADC3)

318.5

166.6

3.5

176.4

124.46

SC84B(ADC10)

318.5

158.76

2.5

191.1

138.18

SC114A(ADC12)

328.3

166.6

2.5

196

138.18

Mechanical properties of aluminum adc12

Alloy

Tensile strength MPa

Endurance MPa

Elongation %

Average Value

σ

ASTM

Average Value

σ

ASTM

Average Value

σ

ADC12

228

41

310

154

14

150

1.4

0.8



ADC12 aluminum ingot chemical composition and mechanical properties control requirements

Elements and content (%) 

Si (9.6-12.0 )

 Cu (1.5-3.5)

 Fe (≤ 1.0) 

Mn (≤ 0.50 ) 

Mg (≤ 0.30) 

Zn (≤ 1.0) 

Ni (≤ 0.5)

 Sn (≤ 0.1) 

Mechanical properties:

 Tensile strength σb ≥ 230N/mm2, elongation δ ≥ 1% Brinell hardness HB ≥ 80, chemical elements in the furnace sample testing The chemical elements are tested in the furnace and can pour the ingots only after passing the test.

ADC12 VS ADC10 Physical Properties

Item

Die casting alloy

Specification-JIS

ADC10

ADC12

Specification-ALCOA

A380

A383

Tensile strength   ( kg/m㎡ )

33

33.6

Strength of fall ( kg/m㎡  )

16.2

16.8

Elongation ( % )

3.5

2.5

Shear strength ( kg/m㎡  )

19

20.3

Fatigue strength ( kg/m㎡  )

14

14

Impulse value ( kg/m㎡ )

Specific gravity (density) ( g/cm³)

2.76

2.7

Melting point ( ℃ )

590

580

Thermal conductivity ( cgs )

0.23

0.23

Burr’s hardness ( 10/500 )

80

85

Electrical conductivity (copper as standard)

23

23

ADC 12 Aluminum alloy dross removal, the refining treatment process

Dross removal


Aluminum alloy melting process, often due to the effective slag removal and purification, trace amounts of slag dissolved in the melt, thus making the surface of aluminum alloy produce snow spots, seriously affecting the quality of aluminum alloy if the slag removal is not clean, will cause slag and other defects, so that the castings scrap. Aluminum is a kind of active metal. Easy to produce aluminum oxide in the melting process. Some non-metal inclusions are also easy to enter the melt. Inclusions are very harmful to aluminum products. Removing inclusions becomes the main task of aluminum melt purification. In production practice, the common inclusions in aluminum alloy melt are A12O3, SiO2, MgO, and so on. Will cause the impurity of the metal liquid, the inclusions affect the fluidity of the melt, the coalescence of bubbles during solidification, and the degree of shrinkage and relaxation. As the density of fine oxide particles is similar to that of aluminum, they are generally suspended in the aluminum liquid. It is difficult to remove them by using the method of aluminum liquid resting. The removed oxide usually contains a lot of aluminum. Although the melt has many other uses, making aluminum less oxidized and removing oxidation inclusions are the main reasons for using the melt.
The principle of slagging in the melting furnace: the slagging agent (or slag remover) is scattered on the surface of the aluminum liquid to separate the slag from the water, and the separated slag is stripped out of the furnace because the slagging agent has Na3AlF6 (or K3SiF6), a salt that can strongly adsorb A12O3, and Na2SiF6 (or K2SiF6), which can react with A12O3 and aluminum as follows.
3Na2SiF6+ 2Al2O3= 2Na3AlF6+ 2AlF3↑+ 3SiO2
Na2SiF6= SiF4↑+ 2NaF6NaF + Al = 3Na + Na3AlF6
The first reaction can eat part of A12O3, the third reaction to make slag water separation, slag picking out of the furnace, to achieve the purpose of de-slagging, and generate Na3AlF6, there is a strong adsorption r-A12O3 role so that the slag and aluminum liquid to get separated. Aluminum alloy slag removal process, the purpose is to make the impurities into the aluminum liquid, oxide slag removed, often in the slag removal, slag contains aluminum liquid. Therefore, it is hoped that the slag contains as little aluminum liquid as possible and the slag to be picked up after frying ash again. The purpose of frying ash is to make the slag in the aluminum extrusion sink in the bottom of the frying pan so that the slag kneading is scattered in the upper part so that the slag ash and aluminum separation. To achieve this purpose is to choose a good slagging agent. The method of slag removal is based on the amount of aluminum in the melting furnace, according to the required ratio of uniform input slag remover, and stirring at a constant rate, and then pull out the filtered slag after 8-10min of resting, slagging requirements for aluminum liquid temperature 720-740 ℃. Experience shows that the slag remover made of slag is loose, not black. Grayish white is a better slag remover.

Refining

The chemical nature of aluminum is relatively active, so even if the hydrogen content in the alloy liquid is very low, a large amount of hydrogen will precipitate out when solidifying, forming defects such as pinholes and inclusions in the casting, thus seriously affecting the mechanical properties of aluminum alloy. Improving the melt quality of aluminum alloy and purifying the alloy liquid is one of the key issues of aluminum alloy melting. It is also an effective way to improve aluminum castings’ product quality and market competitiveness. With an unreasonable refining process, the alloy is not purified, and the casting is prone to porosity. Increasing the effect of gas removal is bound to increase the refining agent added. However, if too much is added, it will easily burn the oxidation of Mg, Al, and Ti, forming other elements and oxidation slag. Therefore, a key aluminum alloy refining process is essential.

Aluminum alloy die casting class, including adc12 aluminum application industries and fields

Application industries: Electronics, automobiles, motors, home appliances and some communication industries, etc. Some high-performance, high precision and toughness high-quality aluminum alloy products are also used in large aircraft, ships and other industries with high requirements.

1) In the construction industry, due to the stability of aluminum in the air and the excellent appearance of the anodic treatment, it is extensively used
2) In the aviation and defence industry, aluminum alloys are also used in large quantities;
3) In electric power transmission, aluminum cable with high-strength steel wire reinforcement is commonly used
4) Kitchen utensils were the earliest use of “aluminum” and still have a large market today.
5) Based on its chemical resistance, “aluminum” is particularly suitable for chemical manufacturing and storage components.
6) Aluminum has a high affinity for oxygen, so it is also used in large quantities as a deaerator for steel and iron.
7) Other: Aluminum is required in large quantities for automobile manufacturing, container transportation, daily necessities, household appliances, mechanical equipment, etc.

The advantages of ADC12 aluminum alloy

  • Excellent pressure resistance, thermal crack resistance and fluidity.
  • Has great tensile strength.
  • Relatively light weight.
  • Ability to resist thermal cracking and corrosion.
  • Good fillability and flowability.
  • Excellent surface finish properties.
  • Has strength at high temperatures.
  • High dimensional accuracy and dimensional stability.
  • Good machinability.
  • The best combination of casting, thermal and mechanical properties.

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