Analysis and application of commonly used domestic and foreign materials for fasteners

Analysis of Common Materials and Applications of Fasteners at Home and Abroad

Introduction

Fasteners are the most basic and fundamental components in the manufacturing process. It is a physical engineering component known as an internal component.They are products used to connect various parts and components together and play a very important role in the performance and reliability of the product.The application of mechanical fastening technology enables the composite parts and systems to realize more complex loading conditions, which in turn improves the quality of the product while also significantly reducing its weight. Due to the great versatility and versatility of this component in applications, many materials are used to make it.

Common materials and applications at home and abroad

1、 Carbon steel

Carbon steel is the oldest and most popular fastener material worldwide. Carbon steel mainly uses 1022 low-carbon steel and alloy carbon structural steel, and is divided into low-carbon steel, medium-carbon steel and high-carbon steel according to the carbon content in steel. The comparison of the mechanical properties of low-carbon steel and alloy steel is shown in Table 1.

Table 1 Mechanical properties of low-carbon steel and alloy steel

2、 Stainless Steel

Stainless steel is a kind of low-carbon alloy steel. It is an integrated system composed of two crystallization elements: Fe-Cr.Because of its special physical and chemical properties, it is widely used not only in corrosion-resistant components but also in many fields. The general corrosion resistance of stainless steel is divided into three grades: 304, 316 and 18-8.The mechanical properties of the three grades are shown in Table 2.

Table 2 Mechanical properties of 304, 316 and 18-8 stainless steel

3、 Non-ferrous fasteners

Nonferrous metal fasteners are mainly composed of aluminum, magnesium, copper, titanium and other metals and their alloys, and are widely used for decoration and high-end construction. In particular, aluminum alloy fasteners have obvious use advantages in aerospace and aircraft fields.Aluminum alloy fasteners are divided into two categories: aluminum alloy die casting fasteners and aluminum alloy solid riveting fasteners. The comparison of properties between them is shown in Table 3.

Table 3 Comparison of properties between aluminum alloy die-cast fasteners and solid riveting fasteners

Application of Fasteners

Automobile industry

The main application products offasteners in the automotive industry are automotive pedals, door handles, brake cylinders, batteries, etc. It is often necessary to use high-strength and corrosion-resistant fasteners to ensure the reliability of cars.The commonly used materials are stainless steel and alloy steel.

Aerospace Industry

The main application of fasteners in the aerospace field is to fix the wings, fuselages and other parts of the aircraft.The space environment for aircraft is particularly harsh, and the fasteners used require high strength, light weight, corrosion and fatigue resistance. Aluminium alloy and titanium alloy fasteners are the main materials used.

In conclusion

Fasteners are the basic structure and components of machinery structures, and their properties and performance directly affect the performance and quality of the technology.The application of a variety of materials has enabled fasteners to meet all kinds of needs, and played an important role in the development of todays industry. Therefore, the research, analysis and selection of fastener materials are of great practical significance.

Fasteners are essential components in our daily life. They can be used to assemble different components together and to join dynamic parts in motion.

The materials used for fasteners can be divided into domestic and foreign materials. Domestic materials are usually cheaper than imported materials and are often used for low-cost parts. Common domestic materials for fasteners are carbon steel and stainless steel. Carbon steel is used for bolting and nutting which is economical and easy to work. It provides general durability, high strength and integrity when used in high strength applications. Stainless steel provides increased corrosion resistance and wear resistance for applications exposed to harsh environments.

Foreign materials are often more expensive but offer higher performance in terms of strength and durability. Common materials for foreign fasteners include titanium, aluminum and brass. Titanium is the most expensive among the three with the highest strength and corrosion resistance. This makes it ideal for high strength and anti-corrosion applications. Aluminum and brass have relatively lower strength than titanium, but they offer a good cost benefit due to its availability and good workability.

Based on the above analysis, different materials can be picked depending on application requirements. Carbon steel and stainless steel are usually chosen for general purpose applications, while titanium, aluminum, and brass are recommended for more specialized applications. No matter what material is picked, the right fasteners are critical to ensure safe operation and environmental protection.