Steels Designations – Here the AISI Standards
The AISI standard is one of the most popular methods of designation in the field of stainless steel. AISI stands for American Iron and Steel Institute; the latter is an association of North American steel producers. In today’s post we want to learn more about this designation system that allows the identification of types of […]
How to Prevent Localised Corrosion of Stainless Steel?
After talking about general corrosion in our previous blog post, today we would like to focus on another type of corrosion. In the specific, we shall treat, about localised corrosion. What is localised corrosion? Contrary to general corrosion, the localised corrosion only occur on certain parts of the metal surface. So, only locally. This corrosion […]
What Is the Annealing Treatment for Austenitic Steels?
Heat-treated steel is subject to more or less complex cycles of heating, maintaining and cooling to defined temperatures. After talking in the previous posts of steel hardening, today we will examine another heat treatment: the annealing. What is the annealing heat-treatment for stainless steels? The process of annealing (intended for austenitic steel, both stainless and […]
What Are the Tempering and Hardening of Hardened Steel?
The hardened steel has low resistance, in addition to an high hardness. Therefore, the hardened steel would be too fragile for most uses. What should you do? Tempering of hardened steel After hardening, it is essential to use the tempering treatment, as it is fundamental to undo any tensions and fragility. How does this kind […]
What Is the Hardening Heat-Treatment Process of Steels?
Hardening heat-treatment process is carried out on different types of metal alloys, especially steel. This treatment is fundamental to increase the hardness of the steel itself. What are the hardening heat treatment phases? To be considered hardenable, the steel must contain a good percentage of carbon and certain alloy elements, such as chromium, nickel and […]
Silicon, Titanium and Vanadium. How Do They Affect Properties of Steel?
How do the properties of steel change when certain chemicals are added during their preparation? Titanium, silicon and vanadium are just a few of these elements we will cover today. Silicon: a semiconductor Silicon (Si) is a tetravalent metalloid and semiconductor. This element is always associated with iron and is used as a constituent in […]
Microscopic Failure Mechanisms of Metals – Fractures
Today we talk about the microscopic failure mechanisms of metals. Specifically, we focus on the fractures and consequently on the crack propagation. What is a fracture? And how does it takes place? A fracture is the separation of an object or a material into two or more pieces under the action of stress. But specifically […]
Fasteners. Loading, Toughness and Hardness Tests
Today in our post we want to talk about the testing methods required by ISO 898-1 for connecting elements. In particular, we will to focus on loading, toughness and hardness tests. Loading test for screws and finished studs This type of test consists of two main actions: Toughness test of screw head The toughness test […]
What Are the National and International Standard-Setting Bodies?
Today we talk about the existing standard-setting bodies. But first, we want make some premise about standardisations and unifications. What are the difference between standardisations and unifications? First of all, standardisations are actions to establish and enforce rules, to put a specific field of activity in order. Secondly, the unifications are forms of standardisation. These […]
Hydraulic Crimping Tools 12 – What to Pay Attention?
As promised in the post on Tuesday, today we want to give you some useful information regarding manual hydraulic crimping tools. In particular, some warnins to watch out for. How to use the Hydraulic Crimping Tools? In this post we want to suggest some tricks for using the hydraulic crimping tool. First, this tool must […]