How Molybdenum, Nitrogen and Nickel Affects Steel Properties?
After speaking about aluminum, manganese, chromium and copper, in today post we will further focus our attention on three other alloying elements (molybdenum, nitrogen and nickel). And, most importantly, how each of them influences steel properties. Molybdenum: a transition metal Molybdenum (symbol Mo) is considered a transition metal thanks to its atomic number 42 on […]
How Do the Alloying Elements Affect Properties of Steels?
Aluminum, chromium, manganese, molybdenum. What is the role of the alloying elements on the properties of steels? When and why are they used? Aluminum and Chromium. Why are they used? ALUMINUM During the preparation of the steel, aluminum (Al) is used both as of the metal grain, for all those fine-grained steels. CHROMIUM Chromium (Cr), […]
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 […]
What Are the Different Tensile Tests for Fasteners?
Today, in our post we want to talk about the testing methods required by standard 898-1 for fasteners. In particular, today we want to focus on all the tensile tests. Tensile tests with oblique support of finished screw This type of test is intended to determine simultaneously: Moreover, we report that the testing with oblique […]
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 […]
How to Make a Correct Designation System for Fasteners?
The “UNI 3740-1 – 1999 – Threaded steel connection elements. Technical requirements. General information.” standards, in addition to specifying the general requirements for steel nuts, bolts and studs, also identifies a system for the designation of fasteners. Furthermore, the “UNI ISO 1891:2014 – Fasteners – Terminology” provides translation guidance for terms and nomenclature commonly used […]
What Are the Solutions to the Connecting Problems?
As mentioned in the post last week, after seeing together what are the functions of the mechanical connections. Today we will talk about the solutions of connecting problems. What are those factors? Thanks to a methodical analysis of the factors will be easier to find a suitable solution to the connecting problem. But we analyze […]
What Are The Functions of Mechanical Connections?
Today, on our post we want to talk about the basic mechanical functions and not just them. But how are they classified? And what functions they perform the mechanical connections? The elementary mechanical functions We can identify in a specific mechanism many different elementary mechanical parts. Therefore, every element is classified according to the specific […]
How Are Dimensions of Technical Drawings Classified?
Today, our post concerns an important technical topic: the dimensions of technical drawings. First, we will analyze briefly the designation criteria and disposition of dimensions. then, we will focus specifically on their classification. What are the criteria for designation of dimensions of technical drawings? These dimensions are the numeric values for a measurements. These can […]
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 […]