Intelligence – Insight – Ingenuity

Global Standards of Aluminium Alloys

Trying to figure out how aluminium specifications from different regions translate to the alloys used domestically can be confusing. There's no single, internationally accepted system for comparing the aluminium alloys used to make castings.

The UK standard, for instance, uses the LM prefix - referring to British Standard 1490.  Such standards specify the chemical constituents and trace elements of aluminium alloys.

The following global aluminium alloy conversion chart should help you to compare the different specifications of alloys between the UK and other countries such as Japan, France, Italy, Germany, and the United States.

UK

ISO

CEN

France

Germany

Italy

USA AA/ASTM

USA SAE

Japan

Australia

LM0

AI 99.5 - A5 - UNI 3950 150 - - -

LM2

AI-Si10Cu2Fe 46100 A-S9U3-Y4 - UNI 5076 384 383 ADC12 -

LM4

Al-Si5Cu3 45000 A-S5U3 G-AlSi6Cu4 (225) UNI 3052 319 326 AC2A AA303

LM5

Al-Mg5Si1

AI-Mg6

51400 A-G6 G-AlMg5 (244) UNI 3058 514 320 AC7A -

LM6

Al-Si12

AL-Si12Fe

44000 A-S13 G-ALSIL2 (230) UNI 4514 A4l3 - AC3A 88401 CC40I EA401

LM9

AI-Si10Mg 43000 A-S10G G-AISi10Mg (233) UNI 3049 A360 309 AC4A -

LM12

AI-Cu10Si2Mg - A-U10G - UNI 3041 222 34   -

LM13

AI-Si12Cu

AI-Si12CuFe

48000

A-S12UN

-

UNI 3050

336

321

AC8A

-

LM16

Al-S15Cu1 Mg

-

A-S4UG

-

UNI 3600

355

322

AC4D

AA 309

LM20

Al-Si12Cu

Al-Si12CuFe

44300

A-S12-Y4

G·AISl12(Cu) (231)

UNI 5079

A413

305

-

DA40

LM21

Al-Si6Cu4

45000

A-S5U2

G-A1Si6Cu4 (225)

UNI 7369/4

308

326

AC2A

-

LM22

AI-Si5Cu3

45400

A-S5U

G-AISl6Cu4 (225)

UNI 3052

319

326

AC2A

-

LM24

AI-Si8Cu3Fe

46000

A-S9U3A-Y4

G-A1S88Cu3 (226)

UNI 5075 UNI 3601

A380

306

AC4B

ADC10

CA313

BA323 AA32

LM25

AL-Si?Mg

42000

A-S7G

G•AISl7MG

UNI 3599

A356

323

AC4C

AA601 AC601 CC60I DA601

LM26

AL-Si9Cu3Mg

46000

A-S7U3G

-

UNI 3050

332

332

-

-

LM27

AL-Si5Cu3

46600

-

-

UNI 7369-79/6

-

-

AC2B

-

LM28

AI-Si19CuMgNi

-

-

-

UNI 6251

-

-

-

-

LM29

AI-Si23CuMgNI

-

-

-

UNI 6251

-

-

-

-

LM30

AI-Si17Cu4Mg

-

-

-

-

390

-

-

-

LM31

AI-Zn5Mg 71000 A-Z5G - UNI 3602 712 310 - -

 

properties And End Uses Of Major Casting Alloys

Whilst some alloys are best for certain casting processes, others have differentiating properties, making them more suitable for specific applications.

Click on any of the major alloys below to see detailed overviews to see their properties and possible end uses.

LM5

LM6

LM9

LM16

LM24

LM25

LM27

LM31

Click here to see our comparison table of the most common aluminium casting alloys.

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