News
-
DUPLEX STAINLESS STEEL WELDING — WHY IS IT SO CRITICAL?
Duplex stainless steel gets its unique combination of strength, toughness and corrosion resistance from its two-phase microstructure: austenite + ferrite. Welding changes the thermal balance, so controlling the welding procedure is essential to preserve the required properties. 1. PHASE BALANCE M...Read more -
Titanium Weld Colour Inspection
A Simple Visual Indicator of Weld Quality Titanium welding demands exceptional shielding. Even slight oxygen contamination during welding can change the weld colour and significantly affect mechanical properties, corrosion resistance, and fatigue performance. The attached Titanium Weld Colour Ins...Read more -
GMAW Shielding Gases
Understanding shielding gas selection is an important part of welding quality. In GMAW (Gas Metal Arc Welding), the shielding gas depends mainly on the welding process and base material. ♦ MIG – Metal Inert Gas Uses inert gases such as: ※ 100% Argon (Ar) – Aluminium and non-ferrous alloys ※ Heli...Read more -
SELF-SHIELDED vs GAS-SHIELDED FCAW — WHAT’S THE DIFFERENCE?
Both use a flux-cored wire, but the shielding method is different. • SELF-SHIELDED FCAW (FCAW-S) The flux inside the wire generates the shielding gases and slag. √ No external shielding gas √ Excellent for field/outdoor welding √ More tolerant of windy conditions √ Good portability » More fumes/s...Read more -
SMAW ELECTRODE SELECTION FOR DIFFERENT STAINLESS-STEEL GRADES
Choosing the correct SMAW electrode isn’t simply about matching the stainless-steel grade. You also need to consider chemical composition, service temperature, corrosion environment, mechanical properties, dissimilar-metal welding and the qualified WPS. ♦ COMMON ELECTRODE SELECTIONS Stainle...Read more -
TYPES OF FLUXES IN SAW — KNOW YOUR FLUX!
In Submerged Arc Welding (SAW), flux covers the arc and molten weld pool, providing shielding while also influencing arc stability, slag formation, weld-metal chemistry and mechanical properties. 1 . FUSED FLUX Melted → cooled → crushed • Good chemical uniformity • Generally low moisture absorpti...Read more -
CARBON STEEL ELECTRODES — WHICH SMAW ELECTRODE SHOULD YOU CHOOSE?
Different carbon-steel electrodes are designed for different combinations of penetration, strength, welding position, deposition rate, arc characteristics and service requirements. ♦ COMMON SMAW ELECTRODES ♠ E6010 — Deep Penetration • Cellulosic coating • Excellent for root passes • All-position ...Read more -
Welding Hot Cracks
Welding Hot Cracks Hot cracks (also called solidification or liquation cracking) are among the most dangerous welding defects. They form at high temperatures, near the solidus, when the weld is still partially molten and extremely brittle. ♦ Where do they occur? ·Weld Metal → Solidification crack...Read more -
Understanding GMAW (MIG) Wire Coding: The Key to Selecting the Right Filler Metal ⚙️
Understanding GMAW (MIG) Wire Coding: The Key to Selecting the Right Filler Metal Choosing the correct welding wire is not just about diameter—it’s about understanding the wire designation and selecting the right filler metal for the application. A proper wire selection directly impacts weld qua...Read more -
6 Major Welding Processes Explained – Which One Should You Choose
Not every welding process is suitable for every job. Selecting the right process depends on the material, thickness, productivity, weld quality, and application. Know the 6 Major Welding Processes: √ SMAW (Shielded Metal Arc Welding) ♦ Portable and economical ♦ Best for maintenance, construction,...Read more -
5 Critical Welding & Metallurgy Topics — Mechanical QA/QC
5 Critical Welding & Metallurgy Topics — Mechanical QA/QC 1. Austenitic SS — Sensitization & IGC Mechanism: Exposure to approximately 500–800°C promotes Cr₂₃C₆ chromium-carbide precipitation at grain boundaries. This produces a Cr-depleted zone adjacent to the grain boundary, reducing pas...Read more -
Types of Welding Defects
1) Crack: Crack is the most serious weld defect. They will eventually cause a weld to fail and welding contractors go to great lengths to avoid them. Welds are under continual internal stress from fatigue, bending, flexing and expansion/contraction and cracking occurs when the internal stresses e...Read more