LM Aluminium Casting Alloy LM0 to LM31 Data specifications (BS 1490:1970 naming), Chemical compositions tables, LM Aluminium Casting Alloy Naming Conversion UK (BS1490:1988) to UK (EN1706:1998) to USA (SAEJ)
Table 1 Aluminium Casting Alloy LM0 - LM31 Usage Spec Data listing Melting Point Range, Pouring Temperature & Shrinkage Allowance. , it cross-references both U.K./ISO/Imp system including the U.S.A. Aluminium casting alloy specifications. Be aware BS 1490:1970 specifying Aluminium casting alloy using the LM designation this has now been replaced by BS EN 1706 using a new numbering system. These Aluminium casting alloy can also be designated under ISO 3522
UK Casting Alloy No. (BS 1490:1970)
Melting
Point
Range
Pouring
Temperature
Shrinkage
Allowance
U.S.A
ASTMB85/AA
ISO 3522 - 1984
LM0
643~657°C
740°C
1.6% or 1/62
150
AL-99.5
LM2
525~570°C
615~700°C
1.3% or 1/75
384
AL-Si10CuFE
LM4
525~625°C
720°C
1.3% or 1/75
319
AL-Si5Cu3
LM5
580~642°C
700°C
1.3% or 1/75
514
AL-Mg5Si1 AL-Mg6 AL-Si12Fe
LM6
565~575°C
725°C
1.3% or 1/75
A413
LM9
550~575°C
725°C
1.3% or 1/75
A360
AL-Si10Si2Mg
LM12
525~625°C
710°C
1.3% or 1/75
222
AL-Cu10SiMg
LM13
525~560°C
710°C
1.3% or 1/75
336
AL-Si12CuFe
LM16
560~620°C
710°C
1.3% or 1/75
356
AL-Si5Cu1Mg
LM20
565~575°C
N/A
1.3% or 1/75
A413
AL-Si12CuFe
LM21
520~615°C
720°C
1.3% or 1/75
308
AL-Si6Cu4
LM22
525~625°C
720°C
1.3% or 1/75
319
AL-Si5Cu3
LM24
520~580°C
700°C
1.3% or 1/75
A380
AL-Si18Cu3Mg
LM25
550~615°C
710°C
1.3% or 1/75
A356.1
AL-Si7MgFe
LM26
520~580°C
700°C
1.3% or 1/75
332
AL-Si19Cu3Mg
LM27
525~605°C
710°C
1.3% or 1/75
U/K
AL-Si5Cu3
LM28
520~575°C
N/A
N/A
U/K
AL-S19CuMgNi
LM29
520~770°C
N/A
N/A
U/K
AL-Si23CuMgNi
LM30
505~650°C
N/A
N/A
390
AL-Si17Cu4Mg
LM31
570~615°C
N/A
1.3% or 1/75
712
AL-Zn5Mg
Table 2 Aluminium Casting Alloy LM0 to LM31 chemical compositions of CU, Mg, Si, Fe, Mn, Ni, Zn, Pb, Sn, Ti alloyed with the copper, the data comes from many references and is accumulated here.
UK Casting Alloy No. (BS 1490:1970)
Cu
Mg
Si
Fe
Mn
Ni
Zn
Pb
Sn
Ti
LM0
0.03
0.03
0.3
0.04
0.03
0.03
0.07
0.03
0.03
0
LM2
0.7~2.5
0.03
9.0~11.5
1.0
0.5
0.5
2.0
0.3
0.2
0.2
LM4
2.0~4.0
0.02
4.0~6.0
0.8
0.2~0.6
0.03
0.5
0.1
0.1
0.2
LM5
0.1
3.0~6.0
0.3
0.6
0.3~6.0
0.1
0.1
0.05
0.05
0.2
LM6
0.1
0.1
10.0~13.0
0.06
0.5
0.1
0.1
0.1
0.05
0.2
LM9
0.2
0.2~0.6
10.0~13.0
0.06
0.3~0.7
0.1
0.1
0.1
0.05
0.2
LM12
9.0~11.0
0.2~0.4
2.5
1.0
0.6
0.5
0.8
0.1
0.1
0.2
LM13
0.7~1.5
0.8~1.5
10.0~13.0
1.0
0.5
1.5
0.5
0.1
0.1
0.2
LM16
1.0~1.5
0.4~5.5
4.5~5.5
0.6
0.5
0.25
0.1
0.1
0.05
0.2
LM20
0.4
10.0~13.0
10.0~13.0
1.0
0.5
0.1
0.2
0.1
0.1
0.2
LM21
3.0~5.0
5.0~7.0
5.0~7.0
1.0
0.2~0.6
0.3
2.0
0.2
0.1
0.2
LM22
2.8~3.8
4.0~6.0
4.0~6.0
0.6
0.2~0.6
0.15
0.15
0.1
0.05
0.2
LM24
3.0~4.0
7.5~9.5
7.5~9.5
1.3
0.5
0.5
3.0
0.3
0.2
0.2
LM25
0.2
0.20~0.6
6.5~7.5
0.5
0.3
0.1
0.1
0.1
0.05
0.2
LM26
2.0~4.0
8.5~10.5
8.5~10.5
1.2
0.5
1.0
1.0
0.2
0.1
0.2
LM27
1.5~2.5
0.35
6.0~8.0
0.8
0.2~0.6
0.3
1.0
0.2
0.1
0.2
LM28
1.3~1.8
0.8~1.5
17~20
0.7
0.6
08~1.5
0.2
0.1
0.1
0.2
LM29
0.8~1.3
0.8~1.3
22.0~25.0
0.7
0.6
0.8~1.3
0.3
0.1
0.1
0.2
LM30
4.0~5.0
0.4~0.7
16.0~18.0
1.1
0.3
0.1
0.2
0.1
0.1
0.2
LM31
0.1
0.25
0.5
0.5
0.1
0.1
4.8~5.7
0.05
0.05
0.25
Table 3 Aluminium Casting Alloy Naming Conversion UK (BS 1490:1988) to UK (EN 1706:1998) to USA (SAEJ)
