Magnetic Particle Testing (MT) Methods
Here’s a detailed explanation of Magnetic Particle Testing (MT) methods for metal components: 1. Basic Principle Ferromagnetic Materials Only: Works on iron, nickel, cobalt, and their alloys. Magnetic Flux Leakage: When the component is magnetized, surface/near-surface defects disrupt magnetic field lines, creating “flux leakage.” Particle Accumulation: Magnetic particles (dry powder or wet suspension) cling to flux leakage zones, […]
What Is Sand Blasting?
Sand Blasting is the process of smoothing a surface with abrasive materials, like sand, ceramic grit, or aluminum oxide. The abrasive materials are pushed out at a high velocity with compressed air. Historical Context The origins of sand blasting trace back to 1870, when Benjamin Chew Tilghman patented the process. Since then, the technique […]
Factors That Can Affect a Charpy Impact Test
Yield Strength In general, as a material’s yield strength increases, its impact energy will decrease. In other words, materials with higher yield strength will generally have lower toughness. Materials that can plastically deform before ultimate failure are considered to be tougher. Notch The V-notch specimen is used when the material is brittle and a U-notch specimen is […]
Carbon Steel vs. Alloy Steel in CNC Machining
Carbon and alloy steels are two (2) of the most used types of steels in CNC machining. But do you know their primary differences? We’ve listed some of the most common differences between them so you become aware of how you can use them differently and similarly. They differ in composition. Alloy steel usually has […]
Rust-preventive Packaging Methods for Metal Parts
Here are common rust-preventive packaging methods for metal parts: VCI (Vapor Corrosion Inhibitor) Packaging: Method: Uses paper, film, foam, or chips infused with volatile corrosion inhibitors that vaporize and form a protective molecular layer on metal surfaces. Benefits: Contact-free protection (no oily residue), easy to use, effective for complex shapes and cavities, reusable if resealed, clean removal […]
Benefits of Utilizing CNC Machining for Steel
CNC machining offers several advantages when working with steel. Precision is a key benefit, as computer-controlled machining ensures accuracy in intricate designs and tight tolerances. This results in high-quality, consistent components. The versatility of CNC machining allows for the production of complex and customized steel parts, meeting diverse industrial requirements. Efficiency is another notable advantage, […]
Drawbacks & Limitations of Galvanizing
Initial Cost & Equipment Requirements Setting up a galvanizing facility does not come cheap. Equipment such as hot-dip tanks and heat systems comes with a higher upfront cost. Environmental & Health Concerns Some galvanizing processes emit toxic gases, which are not only harmful to the environment, but to workers as well. Some processes also […]
International Standards Governing Metal Surface Roughness
Here’s an overview of the key international standards governing metal surface roughness, with a focus on ISO and ASME standards: Core International Standards ISO 21920 Series (Geometrical Product Specifications – Surface texture: Profile method): ISO 21920-1:2021: Defines terms, parameters, and general rules for specifying surface texture using the profile method. Replaces parts of the older ISO 1302. […]
Powder Coating Process
Here’s a detailed breakdown of the Powder Coating Process, covering the key stages: 1. Pre-Treatment (Cleaning & Surface Preparation) Degreasing: Removes oils, grease, and contaminants using alkaline cleaners or solvents. Rinsing: Thorough water rinse to remove cleaning residues. Derusting/Descaling: Eliminates rust/scale via abrasive blasting (sand/grit) or acid etching (e.g., phosphoric acid). Conversion Coating: Applies a chemical layer (e.g., iron phosphate for steel, chromium/chrome-free for […]
Advantages of Galvanizing
Corrosion Protection & Sacrificial Security Zinc creates a strong outer barrier that blocks air and water from reaching the steel or iron. Even if the surface gets scratched, the zinc corrodes first. This sacrificial action helps the steel stay strong underneath, even when the coating is damaged. Long Lifespan Galvanized coatings can last for […]
