Skripsi

ANALISA DISTORSI PADA SAMBUNGAN LAS SS400 DAN SS304 DENGAN SAMBUNGAN LAS TEE JOINT

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Two types of industrial metallic materials commonly used are SS400, which is a low-carbon steel with moderate strength, and SS304, which is an austenitic stainless steel characterized by high corrosion resistance and lower thermal conductivity. This study aims to analyze the magnitude of distortion, hardness distribution, and microstructural changes in dissimilar welded joints between SS400 and SS304 produced using the Shielded Metal Arc Welding (SMAW) process. The research was conducted using SS400 as the main plate with a thickness of 8 mm and SS304 as the vertical plate with thickness variations of 4 mm, 8 mm, and 12 mm. Welding was performed using an E309-16L electrode with a welding current of 130 A and a voltage of 20 V. The experimental results indicate that the distortion value decreases with increasing SS304 thickness. Distortion is influenced by differences in thermal and mechanical properties during the heating and cooling cycles. This phenomenon is supported by microstructural changes occurring in the heat-affected zone (HAZ). Such conditions increase the tendency for angular distortion, particularly in plates with lower stiffness. Microstructural observations in the HAZ reveal the formation of bainite and partial martensite, which is reflected by higher Vickers hardness (VHN) values in the HAZ compared to the weld metal. This condition leads to significant differences in thermal expansion and contraction among the HAZ, weld metal, and base metal. Furthermore, the increase in hardness and the reduction in ductility due to bainite formation make the SS400 HAZ less capable of accommodating plastic deformation

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Detail Information

Series Title

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Call Number

T1913872025

Publisher

Indralaya : Prodi Teknik Mesin, Fakultas Teknik Universitas Sriwijaya., 2025

Collation

xvi, 107 hlm.; ilus.; 29 cm

Language

Indonesia

ISBN/ISSN

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Classification

671.520 7

Content Type

Text

Media Type

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Carrier Type

-

Edition

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Subject(s)

pengelasan
Prodi Teknik Mesin

Specific Detail Info

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Statement of Responsibility

TUTI

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