Effect of Heat Input on the Tensile Strength and Hardness of Weld Metal Using ER410H as Filler Metal Without Heat Treatment

DOI

10.2991/978-94-6463-364-1_77How to use a DOI?

Keywords

weldmetal; TIG; GTAW; martensitic; heat input; tensile; hardness

Abstract

In the oil and gas exploration industry, martensitic stainless-steel (MSS) pipes are commonly employed for its corrosion and abrasion resistance. Binding materials with a thickness of less than 6 mm is typically accomplished using a TIG welding procedure with ER410H as the filler material. It is believed that the effect of heat on the mechanical properties of weld metal is proportional to the amount of heat input applied. To the best of our knowledge, no research has been conducted on the extent of change in the mechanical properties of weld metal when ER410H is used as a filler material. Therefore, the purpose of this research is to assess the effect of heat input on the mechanical properties of weld metal employing ER410H as a filler material. TIG welding was employed as the welding procedure. Variation of heat input was carried out by varying the welding current. The specimen is weld metal measures 300 mm in length and 6 mm in thickness. The welding process is carried out conventionally, that is, without prior or subsequent heat treatment. Tensile and hardness tests were then carried out on the specimens. According to the test results, the maximum average hardness was 389.8 HV at the average heat input, current, and voltage were 2.1 kJ/min, 110 A, and 15.5 V, respectively. Meanwhile, the lowest average hardness was 370.5 HV at the average heat input, current, and voltage were 1.9 kJ/min, 90 A, and 13.3 V, respectively. The highest average tensile strength was 90.9 kgf/mm² at the average heat input, current, voltage were 2.1 kJ/mm, 110 A, and 15.5 V, respectively. Meanwhile, the lowest average tensile strength was 79.0 kgf/mm² at the average heat input, current, and voltage were 1.9 kJ/mm, 90 A, 13.3 V, respectively. It was concluded that the greater the heat input, the higher the tensile strength and the hardness of weld metal. The increase is caused by the fact that the martensitic material relatively cools down quickly, so it is easier to produce a martensite phase during welding.

Copyright

© 2024 The Author(s)

Open Access

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TY  - CONF
AU  - Usman Usman
AU  - Syukran Syukran
AU  - Azwinurc Azwinure
AU  - Teuku Rachmad Saputra
PY  - 2024
DA  - 2024/02/17
TI  - Effect of Heat Input on the Tensile Strength and Hardness of Weld Metal Using ER410H as Filler Metal Without Heat Treatment
BT  - Proceedings of the International Conference on Applied Science and Technology on Engineering Science 2023 (iCAST-ES 2023)
PB  - Atlantis Press
SP  - 858
EP  - 868
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-364-1_77
DO  - 10.2991/978-94-6463-364-1_77
ID  - Usman2024
ER  -