1. Bahan Konstruksi Industri (TKK-2238)
15/16 Semester genap
Bahan Konstruksi Industri (TKK-2238)
Instructor: Rama Oktavian
Office Hr.: T , Th ; 13-15, F ; 13-15

2. Bahan Konstruksi
Aluminum and its alloys

3. Bahan Konstruksi Aluminum and its alloys
The main criteria in the selection of aluminum and its alloys for chemical plants are corrosion resistance, ease of fabrication and price
High-quality aluminum grades are used for chemical and process plant
applications.

4. Bahan Konstruksi
Aluminum and its alloys
Mechanical properties

5. Bahan Konstruksi
Aluminum and its alloys
Mechanical properties

6. Bahan Konstruksi
Aluminum and its alloys
Corrosion resistance

7. Bahan Konstruksi Aluminum and its alloys
Alloy designation system-wrought alloys - The four digit system for wrought alloy identification.
This system is administered by the Aluminium Association (AA), Washington USA

8. Bahan Konstruksi
Aluminum and its alloys
Alloy designation system

9. Bahan Konstruksi Aluminum and its alloys Alloy designation system
1XXX Group
The second digit indicates modifications in impurity limits or alloying elements. For example, 1145 indicates aluminium of 99,45% minimum purity with the second digit 1 indicating special control of Iron and Silicon

10. Bahan Konstruksi Aluminum and its alloys Alloy designation system
2XXX to 8XXX Group

11. Bahan Konstruksi Aluminum and its alloys
Aluminum of Commercial 99%Minimum Aluminum Purity
used widely for chemical and process plant applications where its resistance to corrosion and high thermal conductivity are desirable

12. Bahan Konstruksi
Aluminum and its alloys

13. Bahan Konstruksi
Aluminum and its alloys

14. Bahan Konstruksi
Aluminum and its alloys

15. Bahan Konstruksi
Aluminum and its alloys

16. Bahan Konstruksi
Aluminum and its alloys

17. Bahan Konstruksi
Aluminum and its alloys

18. Bahan Konstruksi
Aluminum and its alloys

19. Bahan Konstruksi
Aluminum and its alloys

20. Bahan Konstruksi
Aluminum and its alloys

21. Bahan Konstruksi
Aluminum and its alloys

22. Bahan Konstruksi
Aluminum and its alloys

23. Bahan Konstruksi
Aluminum and its alloys

24. Bahan Konstruksi
Aluminum and its alloys

25. Bahan Konstruksi
Aluminum and its alloys

26. Bahan Konstruksi Aluminum and its alloys Temperature effect
Tensile strength diminishes rapidly with increasing temperature above 200°C. The high-magnesium alloys N5, N6 and N8 should not be used above 65°C because higher temperatures make them susceptible to stress corrosion cracking.
The most popular alloy for cryogenic applications is 4.5% magnesium alloy (N8)

27. Bahan Konstruksi
Aluminum and its alloys
Temperature effect

28. Bahan Konstruksi Aluminum and its alloys Corrosion resistance
Aluminum is suitable for contact with cold dilute sulfuric acid solutions. As the H2SO4 concentration increases, rates of attack also increase.

29. Bahan Konstruksi Aluminum and its alloys Corrosion resistance
Aluminum and stainless steel are used almost interchangeably for any strength of nitric acid. Higher rates of aluminum corrosion occur up to about 80%nitric acid (HNO3)

30. Thank You !