Bahan Konstruksi Industri (TKK-2238)

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Presentation transcript:

Bahan Konstruksi Industri (TKK-2238) 15/16 Semester genap Bahan Konstruksi Industri (TKK-2238) Instructor: Rama Oktavian Email: Oktavian.rama2@gmail.com Office Hr.: T. 11-12, Th. 08-10; 13-15, F. 08-10; 13-15

Bahan Konstruksi Aluminum and its alloys

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.

Bahan Konstruksi Aluminum and its alloys Mechanical properties

Bahan Konstruksi Aluminum and its alloys Mechanical properties

Bahan Konstruksi Aluminum and its alloys Corrosion resistance

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

Bahan Konstruksi Aluminum and its alloys Alloy designation system

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

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

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

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

Bahan Konstruksi Aluminum and its alloys

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)

Bahan Konstruksi Aluminum and its alloys Temperature effect

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.

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)

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