Welding Metallurgy

Carbon Equivalent, Preheat, Heat Input, Hydrogen Cracking, Hot Cracking, Microstructure, Alloying Elements, Heat Treatment, P91/P92, Stainless Steel types, Carbon Steel types

Steel Microstructure Phases Explained: Ferrite, Pearlite, Bainite & Martensite

Understanding the Foundation of Steel Performance Introduction Steel is not simply ‘steel.’ Its performance characteristics—strength, ductility, toughness, and durability—are fundamentally determined by its microstructure. This microstructure, in turn, is governed by two critical factors: carbon content and heat treatment processes. Understanding steel microstructure phases is essential for engineers, metallurgists, and fabricators who need to select […]

Simulation Heat Treatment Requirement as per ASME

In pressure vessel fabrication, heat treatment plays a critical role in ensuring material strength, toughness, and overall reliability. When dealing with dish heads and shell plates, engineers often encounter the requirement of Simulation Heat Treatment (SHT) on test coupons to verify compliance with ASME Section VIII Division 1 and Division 2. Understanding how and when

Heat Treatment for Fabricators: What You Need to Know

“In the world of metals, it’s not just what you’re made of—but how you’re treated that defines your strength.” Heat treatment is a critical metallurgical process used across a wide range of industries—from automotive and aerospace to construction and manufacturing. It involves controlled heating and cooling of metals to alter their physical and mechanical properties

Complete Guide to Welding Duplex Stainless Steels (P No. 10H)

Introduction With increasing demand in the Oil & Gas, water purification, and chemical processing industries, Duplex Stainless Steels (DSS) have become essential materials. Their exceptional corrosion resistance, mechanical strength, and toughness make them ideal for high-performance applications.However, welding DSS is not difficult—but it is different. This article combines practical industry guidance and technical depth to

Fractography in Metals a Professional Guide

Fractography is the study of fracture surfaces of materials, especially metals, to determine the causes and mechanisms of failure. This technique plays a pivotal role in metallurgy, materials science, and engineering failure investigations. By examining the surface of broken components using tools like Scanning Electron Microscopy (SEM) or low-magnification stereo-microscopy, engineers can uncover deep insights

What is carbon steel and Its types

Iron and carbon are the most abundant materials present in steel. Pure iron is not particularly strong or hard on its own, so it is the addition of carbon/other alloying elements that gives steel its increased strength. We will discuss carbon steel types in this article. Carbon steel is a steel with carbon content from

What is stainless steel and its types

Stainless steel also known as inox, corrosion-resistant steel(CRES), and rustless steel, is an alloy of iron which is resistant to corrosion and rust. It contains iron with chromium, nickel and other elements like molybdenum, carbon, manganese and nitrogen depending on specific grade. Stainless steel’s corrosion resistant property results from presence of chromium 10.5 % or

Ferrite Testing – Why It Matters in Stainless Steel Welding

Ferrite testing, also known as a ferritescope test, is a fast and non-destructive inspection technique used to measure delta ferrite levels in austenitic stainless steel and duplex stainless steel materials. Maintaining the correct ferrite content is crucial for ensuring corrosion resistance, durability, and preventing cracks in the material. Exceeding the maximum allowable ferrite content can

Effect of Alloying Elements on the Properties of Steel

Steel, a fundamental material in modern industrial applications, owes its versatility and performance to the careful inclusion of various alloying elements. Alloying elements are introduced to steel to alter its properties, enhancing its strength, durability, corrosion resistance, and other crucial characteristics. Steels are manufactured by combining iron with carbon, a process integral to steelmaking. The

Hydrogen Cracking in Steel Welding – Explained for Engineers

Hydrogen cracking, also known as hydrogen-induced cracking or HIC, is a common concern in various industries, particularly in the field of metalworking, welding, and construction. This phenomenon occurs when hydrogen atoms infiltrate the microstructure of a metal, causing it to become brittle and prone to cracking. Understanding the common causes and effective cures for hydrogen