What is high strength bolts ?

Date:

2019-05-19 19:00:25

Views:

713

Rating:

1Like 0Dislike

Share:

Table of contents:

Bolt is one of the most common metric fasteners. Its simple design allows you to combine items with different technical and operational characteristics. There are several classifications of bolt hardware, but in terms of the reliability of the most important separation according to the degree of resistance to physical loads. This property depends on functional stability and durability to the target design. Most attractive in this respect, high-strength bolts used in motor vehicles, industrial units and responsible building structures.

General information

the Use of high-strength bolts

The Foundation formed metal rod with a thread and a head, designed to capture the key of the correct size. Often use the elements with hexagon heads which are considered the most reliable. As the material is alloy carbon steel, able to withstand large structural loads. However, there are other brands of used alloys. These and other requirements to manufacture this products regulates GOST 52644. High strength bolts must conform to a specific class and reliability. For entry level items, for example, applies the marking of 8.8 for strength. This is a common type of fasteners, performed from hardened steel. In heavy loaded structures assumes the use of bolts, strength class which corresponds to the markings 10.9 and 12.9. A distinctive feature of this hardware can be called the ability not just to withstand a constant static load, and multiple cycles of Assembly and disassembly operations.

Operational characteristics

high Strength bolt

Compared to conventional fasteners high-strength products can be used not only under conditions of high mechanical loads, but under the heat and other negative influences. Paramount properties – fluidity and tensile strength. A balanced distribution of high-strength bolts through the sheathing or connection allows you to evenly distribute the load, thereby ensuring the reliability of the design. In the process of operation, the master calculates the nominal tensile strength, which is indicated in N/mm2. Minimum tensile strength will depend on the figures indicated in the marking. For example, 10h100 will result in 1000 N/mm2. Also the features of this type of fasteners include resistance to degradation by moisture, that is, protection against corrosion destruction.

Recommended

Staff evaluation: system and methods

Staff evaluation: system and methods

Personnel Assessment allows you to identify how competent the employees involved in the enterprise, and it is the performance of their work – the most significant factor affecting the efficiency of the company. To clarify the impact of performa...

How to start your own business: important aspects.

How to start your own business: important aspects.

Many people, tired of working for someone else, are increasingly thinking about how to start your own business. Someone wants to open a salon, someone store, and someone enough and vegetable stalls. Before you throw in the pool with his head, it is i...

business activities. its essence and basic functions

Business activities. its essence and basic functions

The Entrepreneurial activity of the citizen – is undertaken at your own risk and independent activity, which aims to systematically profit through the sale of works, goods, services, use of the property. The citizen engaged in such activities, ...

Dimensions products

Sizes of high-strength bolts

To specify parameters of the product uses a special marking-M16-48. It can have the following dimensions:

  • Length: 40-300 mm.
  • Diameter: 16-48 mm.
  • Thread Length: 6-18 mm.
  • Head Height: 8-24 mm.
  • Head Diameter: 19-53 mm.
  • Coating Thickness: 25-40 microns.

It is Important to emphasize that all of these dimensions are interrelated. That is, for example, at a certain length restricted to the thickness of the stud and the thread pitch. This is due to the fact that even the controlled tensioning of high strength bolts is not always possible to provide hardware moderate force, protecting it from disruptions and deformations.

Requirements for making connections

Mount high strength bolts

Mounting operations are performed only after a thorough analysis of the technical conditions of the target structure or operating mechanism. In particular, the choice of hardware on the dimensional characteristics of the pre-calculated coefficient of torsion, optimal mechanical properties and options auxiliary mounting hardware. Do not forget that high-strength bolts during installation to form a bunch of nuts and washers, which should correspond to the carrier core by the geometrical parameters.

In the implementation of the installation works the following operations are performed:

  • Preparation of hardware checking his condition.
  • Preparation work surfaces (cleaning, degreasing).
  • The Execution connections high-strength bolts using special tool. Allowed the use of manual keys or wrenches with optimum torque.
  • Control of the operation performed. Evaluation of reliability of the fastener, its geometrical accuracy and tensile strength.
  • Seal, sealing, and priming joints.

Scope of application high-strength bolts

This type of fastener is mainly used in heavy industry and construction. In industries such bolts used in the Assembly of vehicles, engineering units, specialized equipment, etc. with regard to the construction sector, in accordance with GOST, high strength bolts are recommended for use in buildings and structures, which take on temporary, permanent and special loads. For example, the hardware to connect the pieces of the designs that are in the processthe operation will be a seismic explosive and vibration fluctuations. On Wednesdays the use of a hard limitation. High strength alloy is successfully applied in the conditions of a temperature down to -60 °C when exposed to aggressive chemicals.

Types of high strength bolts

Conclusion

Create the optimal characteristics of the connection only when using the appropriate fasteners. Design of fasteners of increased strength, of course, improves the quality of the docking station, but it is necessary to choose the right type of thread, shape of head, size, etc. for Example, according to the same GOST, high strength bolts can have complete and incomplete thread. In the first case, the portion of the rod receives a “clean” surface, and the second – corrugated throughout its length. Therefore, the purpose of these bolts will be different. Attention should be paid and the methods of applying protective coatings. The main enemy of metal fasteners is rust and to best protect the structure from its distribution, you must initially choose products, past galvanizing or corrosion-resistant plating. This is mainly for use in the outer surfaces of the building structures and vehicles.


Article in other languages:

AR: https://tostpost.com/ar/business/17251-what-is-high-strength-bolts.html

BE: https://tostpost.com/be/b-znes/33233-shto-takoe-vysokatryvalyya-balty.html

DE: https://tostpost.com/de/business/32912-was-ist-der-hochfeste-schrauben.html

ES: https://tostpost.com/es/centro-de/32795-que-tal-tornillos-de-alta-resistencia.html

HI: https://tostpost.com/hi/business/18868-what-is-high-strength-bolts.html

JA: https://tostpost.com/ja/business/16917-what-is-high-strength-bolts.html

KK: https://tostpost.com/kk/biznes/33554-b-l-t-z-md-l-g-zho-ary-bolttar.html

PL: https://tostpost.com/pl/biznes/34609-co-to-jest-o-wysokiej-wytrzyma-o-ci-ruby.html

PT: https://tostpost.com/pt/neg-cios/34409-o-que-de-parafusos-de-alta-resist-ncia.html

TR: https://tostpost.com/tr/business/29992-nedir-y-ksek-mukavemetli-c-vata.html

UK: https://tostpost.com/uk/b-znes/33760-scho-take-visokom-cn-bolti.html

ZH: https://tostpost.com/zh/business/2623-what-is-high-strength-bolts.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

Comments (0)

This article has no comment, be the first!

Add comment

Related News

Barter transactions - barter is the direct operation. Barter agreement. Barter

Barter transactions - barter is the direct operation. Barter agreement. Barter

Quite often, the exchange of services or products realized by individuals and legal entities, without participation of funds. It's a barter deal. With the advent of network technology and modern vehicles, this system has become gl...

When high turnover plays into the hands of the leadership

When high turnover plays into the hands of the leadership

the image of the company, including as an employer, consists of a set of characteristics (turnover, productivity, profitability, economic stability), reflecting the success of the business. Effective method From what people say, w...

Project management - what is it? The pros and cons

Project management - what is it? The pros and cons

Project management – is an essential element of a modern system of management in Russia. Many domestic and foreign companies use project management to improve the quality of products and services, reduce costs, increase prof...

Public Debt Management

Public Debt Management

 public debt Management – the system of financial activities undertaken by the state for the purpose of repayment of borrowings and payment of income on these loans, changes in terms and conditions of the released loans...

Vegetable store as a business: plan, profitability, reviews

Vegetable store as a business: plan, profitability, reviews

For the Foundation of their business, an increasing number of people chooses the agricultural sector. In our country a lot of farmers engaged in cultivation of fruit and vegetables, and sells products while cleaning at competitive...

What is modernisation? Definition and main characteristics

What is modernisation? Definition and main characteristics

What is the modernization (modernisation)? The term is derived from the French word moderne, which means "modern", "modern". Modernization means the update process in accordance with the new modern requirements. Synonyms are to im...