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.

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

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