Material
L. M. Chart
| Aluminium Alloy and its Approximate Equivalents | ||||||||
|---|---|---|---|---|---|---|---|---|
| UK/INDIA | ISO | EN AC- | FRANCE | GERMANY | ITALY UNI | USA AA/ASTM | USA SAE | JAPAN |
| LM 0 | Al 99.5 | - | A5 | - | 3950 | 150 | - | - |
| LM 2 | Al-Si10Cu2Fe | 46 100 | A-S9U3-Y4 | - | 5076 | 384 | 383 | ADC 12 |
| LM 4 | Al-Si5Cu3 | 45 200 | A-S5U3 | G-AlSi6Cu4 (225) | 3052 | 319 | 326 | AC 2A |
| LM 5 | Al-Mg5Sil - AlMg6 | 51 300 | AG6 | G-AlMg5 (244) | 3058 | 514 | 320 | AC 7A |
| LM 6 | Al-Si12 - Al-Si12Fe | 44 100 | AS 13 | G-AlSi12 (230) | 4514 | A413 | - | AC 3A |
| LM 9 | Al-Si10Mg | 43 100 | A-S10G | G-AlSi10Mg (233) | 3049 | A360 | 309 | AC 4A |
| LM 12 | Al-Cu10Si2Mg | - | A-U10G | - | 3041 | 222 | 34 | - |
| LM 13 | Al-Si12Cu - Al-Si12CuFe | 48 000 | A-S12UN | - | 3050 | 336 | 321 | AC 8A |
| LM 16 | Al-Si5Cu1Mg | 45 300 | A-S4UG | - | 3600 | 355 | 322 | AC 4D |
| LM 20 | Al-Si12Cu - Al-Si12CuFe | 47 000 | A-S12-Y4 | G-AlSi12(Cu) (231) | 5079 | A413 | 305 | - |
| LM 21 | Al-Si6Cu4 | 45 000 | A-S5U2 | G-AlSi6Cu4 (225) | 7369/4 | 308 | 326 | AC 2A |
| LM 22 | Al-Si5Cu3 | 45 400 | A-S5U | G-AlSi6Cu4 (225) | 3052 | 319 | 326 | AC 2A |
| LM 24 | Al-Si8Cu3Fe | 46 500 | A-S9U3A-Y4 | G-AlSi8Cu3 (226) | 5075 | A380 | 306 | AC 4B |
| LM 25 | Al-Si7Mg | 42 000 | A-S7G | G-AlSi7Mg | 3601 | A356 | 323 | ADC10 |
| LM 26 | Al-Si9Cu3Mg- | - | A-S7U3G | - | 3599 | 332 | 332 | AC 4C |
| LM 27 | Al-Si7Cu2Mn0.5 | 46 600 | - | - | 3050 | - | - | - |
| LM 28 | Al-Si19CuMgNi | - | - | - | 7369 | - | - | AC 2B |
| LM 29 | Al-Si23CuMgNi | - | - | - | 6251 | - | - | - |
| LM 30 | Al-Si17Cu4Mg | - | - | - | 6251 | 390 | - | - |
| LM 31 | Al-Zn5 | 71 000 | A-Z5G | - | 3602 | 712 | 310 | - |
| Aluminum Alloy and its Recommended end use | |
|---|---|
| LM 0 | Alloy suitable for Sand Casting, components for Electrical, Chemical and Food Processing Industries. |
| LM 2 | One of the two most widely used alloys for all types of die-castings. |
| LM 4 | The most versatile of the alloys, has very good casting characteristics and isused for a very wide range of applications. |
| Strength and Hardness can be gratelyincresed by Heat Treatment. | |
| LM 5 | Suitable for Sand and Chill Castings requiring maximul corrosion resistance i.e.castings of marine application. |
| LM 6 | Suitable for large, intricate and thin walled castings in all types of moulds, also used where corrosion resistance or ductility is required. |
| LM 9 | Used for allplications especially low pressure die casting requiring the characteristics of LM 6 with higher tensile strength after heat treatment. |
| LM 12 | Mainly used for sand and chill castings requiring high strength and shock resistance. Requires special foundry techniques and heat treatment. |
| LM 13 | Mainly used for piston and applications where thermal stresses are more. This alloy can witstand higher termperatures and loads.It has good wear resistance properties and machinability. Requires heat treatment. |
| LM 16 | Suitable where high mechanical properties are desired in fairly intricate sand and chill castings. Requires heat treatment. |
| LM 20 | Mainly used for pressure die casting. Similar to LM 6 but with better machinability and hardness. |
| LM 21 | Generally similar to LM 4M in character and application but better machinability and proof strength. |
| LM 22 | Used for chill castings requiring good foundry characteristics and good ductility. Requires heat treatment. |
| LM 24 | Suitable for large, intricate and thin walled castings in all types of moulds, also used where corrosion resistance or ductity is required. |
| LM 25 | Suitable where good corrosion resistance combined with thermal properties are required. Strength is attained by heat treatment. |
| LM 26 | Mainly used for pistons as alternate to LM 13. |
| LM 27 | A versatile sand and chill cast alloy introduced as an alternative to LM 4 and LM 21. |
| LM 28 | Piston alloy with lower coefficient of thermal expansion than LM 13. This alloy use requires special foundry technique. |
| LM 29 | Same characteristics as LM 28 but with still lower coefficient of thermal expansion than LM 28. |
| LM 30 | For unlined die cast cylinder blocks with low expansion and excellent wear resistance. |
| LM 31 | very good shock resistance and is suitable for shock resisting components. It is used for general engineering castings, particularly large sand castings. |
| Chemical Composition of Alloys (As per BS 1490:1988 Std.) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | Cu | Mg | Si | Fe | Mn | Ni | Zn | Pb | Sn | Ti | Additional Elements | Others |
| LM 0 | 0.03 | 0.03 | 0.3 | 0.4 | 0.03 | 0.03 | 0.07 | 0.03 | 0.03 | - | Al 99.50 min | - |
| LM 2 | 0.7-2.5 | 0.3 | 9.0-11.5 | 1 | 0.5 | 0.5 | 2 | 0.3 | 0.2 | 0.2 | - | 0.5 |
| LM 4 | 2.0-4.0 | 0.2 | 4.0-6.0 | 0.8 | 0.2-0.6 | 0.3 | 0.5 | 0.1 | 0.1 | 0.2 | - | 0.2 |
| LM 5 | 0.1 | 3.0-6.0 | 0.3 | 0.6 | 0.3-0.7 | 0.1 | 0.1 | 0.05 | 0.05 | 0.2 | - | 0.2 |
| LM 6 | 0.1 | 0.1 | 10.0-13.0 | 0.6 | 0.5 | 0.1 | 0.1 | 0.1 | 0.05 | 0.2 | - | 0.2 |
| LM 9 | 0.2 | 0.2-0.6 | 10.0-13.0 | 0.6 | 0.3-0.7 | 0.1 | 0.1 | 0.1 | 0.05 | 0.2 | - | - |
| LM 12 | 9.0-11.0 | 0.2-0.4 | 2.5 | 1 | 0.6 | 0.5 | 0.8 | 0.1 | 0.1 | 0.2 | - | 0.2 |
| LM 13 | 0.7-1.5 | 0.8-1.5 | 10.5-13.0 | 1 | 0.5 | 1.5 | 0.5 | 0.1 | 0.1 | 0.2 | - | - |
| LM 16 | 1.0-1.5 | 0.4-0.6 | 4.5-5.5 | 0.6 | 0.5 | 0.25 | 0.1 | 0.1 | 0.05 | 0.2 | - | - |
| LM 20 | 0.4 | 0.2 | 10.0-13.0 | 1 | 0.5 | 0.1 | 0.2 | 0.1 | 0.1 | 0.2 | - | - |
| LM 21 | 3.0-5.0 | 0.1-0.3 | 5.0-7.0 | 1 | 0.2-0.6 | 0.3 | 2 | 0.2 | 0.1 | 0.2 | - | - |
| LM 22 | 2.8-3.8 | 0.05 | 4.0-6.0 | 0.6 | 0.2-0.6 | 0.15 | 0.15 | 0.1 | 0.05 | 0.2 | - | - |
| LM 24 | 3.0-4.0 | 0.3 | 7.5-9.5 | 1.3 | 0.5 | 0.5 | 3 | 0.3 | 0.2 | 0.2 | - | - |
| LM 25 | 0.2 | 0.2-0.6 | 6.5-7.5 | 0.5 | 0.3 | 0.1 | 0.1 | 0.1 | 0.05 | 0.2 | - | - |
| LM 26 | 2.0-4.0 | 0.5-1.5 | 8.5-10.5 | 1.2 | 0.5 | 1 | 1 | 0.2 | 0.1 | 0.2 | - | - |
| LM 27 | 1.5-2.5 | 0.35 | 6.0-8.0 | 0.8 | 0.2-0.6 | 0.3 | 1 | 0.2 | 0.1 | 0.2 | - | - |
| LM 28 | 1.3-1.8 | 0.8-1.5 | 17.0-20.0 | 0.7 | 0.6 | 0.8-1.5 | 0.2 | 0.1 | 0.1 | 0.2 | - | - |
| LM 29 | 0.8-1.3 | 0.8-1.3 | 22.0-25.0 | 0.7 | 0.6 | 0.8-1.3 | 0.2 | 0.1 | 0.1 | 0.2 | - | - |
| LM 30 | 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 | - | - |
| LM 31 | 0.1 | 0.5-0.75 | 0.25 | 0.5 | 0.1 | 0.1 | 4.8-5.7 | 0.05 | 0.05 | 0.2 | - | - |