welding joints

Types of welding joints and welding symbols in pipe and plate

The welding symbols standard There are 2 major welding standards recognized in the welding industry. The first one is European Standard (EN 2553 – Welded – Brazed and Soldered Joints – Symbolic Representation on Drawings) and the second is American Standard (AWS A2.4 – Standard Symbols For Welding, Brazing and Nondestructive Examination). Different jobs require different types of welding joints, as in different applications it will need to stand up to different needs and forces. There are basically five types of welding joints to bring the two metal parts together.   Basic Welding Symbol in American standard (AWS-A2.4-2012), there is a distinction between the terms of weld symbol and welding symbol. The weld symbol indicates the type of weld and, when used, is a part of the welding symbol. In the present system, the joint is the basis of reference. The arrow side is the side of the joint to[…]

Read more
what is Heat affected zone

what is Heat Affected Zone – HAZ in welding?

Base metal vs HAZ Metals in welding results can be categorized into 3 parts, namely: base metal (initial workpiece), heat affected zone (heat affected area) and weld metal (weld metal). The base metal is a base metal part where heat and welding temperature do not cause changes in the structure or properties of the metal. The heat affected zone (HAZ) is a base metal that is adjacent to the weld metal which undergoes a thermal cycle of heating and cooling during the welding process so that this area is the most critical of the welded joint. Weld metal is a part of metal which at the time of welding melts and then freezes, the composition of the weld metal consists of the parent metal component and the added material from the electrode. The heat affected zone is formed during welding and includes the area of the material next to the[…]

Read more
carbon equivalent ce calculator

carbon equivalent formula and ce calculator

Why carbon content is important? The most widely used metal material in the industry is carbon steel and its alloys. Carbon steel is compounded based on carbon content and alloying elements. carbon content is one of the elements with the most influence on the nature or characteristics of a metal. The more carbon content, the metal becomes stronger and harder. however, hard material has brittle characteristics or is less resilient and increases the likelihood of cracking in the weld joint area. Explanations of the carbon equivalent One of the biggest problems in the welding technology of high-strength fine-grained steels is cold cracking. In general, the cold cracking tendency of micro-alloyed fine-grained steels is low. However, if higher carbon contents are present, there may be hydrogen-favored cold cracking in the heat affected zone. Since other alloying elements promote cold cracking in addition to carbon, carbon equivalents are often used to estimate[…]

Read more

Weldability of steel and its carbon content

Which materials are weldable? Since the possibility of welding and welding safety can be strongly influenced by machines and aids, the consideration of the basic weldability of a substance is usually most important. It may happen that a substance that is not suitable for fusion welding, can be very well suited for a pressure welding. The weldability can therefore always be evaluated only in relation to a welding process . Weldability of components The weldability of components is decided on the basis of three criteria. Weldability is the ability of the fabric to be inseparably linked to the same or different fabric when using a welding technique. The possibility of welding refers to adequate equipment for carrying out the planned welding process, ie it is aimed at a suitable workplace. Welding reliability weighs the likelihood of deformation or other errors due to welding influences. Which properties should a weldable material[…]

Read more