What are the specific requirements for the treatment of high strength blackened bolts? Degreasing, derusting and cleaning shall be carried out for high strength blackened bolts before treatment. Incomplete cleaning will affect the blackening effect. It is recommended to use hydrochloric acid of more than 15% concentration for pickling. The treatment of high strength blackened [...]
Advantages of hot dip galvanized hexagon bolts: Low treatment cost: the cost of hot dip galvanizing antirust is lower than that of other coatings; Durable: in suburban environment, the standard thickness of hot-dip galvanizing antirust can be maintained for more than 50 years without repair; Hot dip galvanized bolt is also called hot-dip galvanizing and [...]
Featurers of high strength hot dip galvanized bolts High strength hot dip galvanized bolt is a typical anodic coating, which is mainly used to improve the corrosion resistance of the substrate. Because of its thin coating thickness, it is mainly used for surface anti-corrosion protection under general environmental conditions. After chromate passivation treatment, the corrosion [...]
Application advantages of high strength hot dip galvanized bolt High strength hot-dip galvanized bolts are widely used. Compared with other paint coatings, the cost of hot-dip galvanized bolts is very low, but they can also play the role of rust prevention and corrosion prevention, so they are welcomed by manufacturers and enterprises. Application advantages of [...]
How to clean high strength galvanized bolts? Generally, when high strength galvanized bolts are cutting and cold heading, there will be cooling oil on the outer surface of the fasteners, and there will be residual oil on the outer surface of the fasteners after quenching in the heat treatment oil, which will be attached on [...]
Characteristics of high strength bolts High strength bolts are made of high strength steel, or bolts that need to be applied with large preload, which can be called high strength bolts. High strength bolts are mostly used to connect bridges, rails, high pressure and ultra-high pressure equipment. The fracture of this kind of bolt is [...]
Today, We will introduce the classification of high strength bolts. According to the stress state, high strength bolts can be divided into friction type and pressure bearing type. In fact, there are differences in design and calculation methods. The ultimate bearing capacity of friction type high-strength bolts is the sliding between plates; The bearing capacity [...]
Treatment technology of Dacromet hexagon bolt Dacromet is a kind of inorganic conversion film containing zinc, aluminum and chromium, which is directly immersed in Dacromet treatment solution without electrodeposition, or adhered to the surface of workpiece by brush coating and electrostatic spraying, and then sintered. Dacromet hexagon bolt refers to the Dacromet plating on the [...]
Advantages and applications of high strength hot dip galvanized bolt The high-strength galvanized bolt is a method of immersing the bolt into the pre heated and melted zinc plating bath to form a layer of zinc coating on the surface of the workpiece after degreasing and derusting. High strength hot-dip galvanized bolt connection has the [...]
Appearance requirements for blackening of high strength bolts: 1. The appearance of blackening treatment is blue black or dark black. 2. The film crystallizes compactly and evenly, and the product has no bottom exposure, obvious color difference, whitening and other abnormal phenomena. If the blackening treatment of high strength blackened bolt is abnormal, the following [...]
Anti loosing method of outer hexagon bolt 1、 Permanent anti loosing method Spot welding, riveting, bonding, etc. This method mostly needs to crush the threaded fasteners during disassembly, which can not be reused. 2、 Friction anti loosing method This is one of the most widely used anti loosing methods. In this method, a positive pressure [...]
The processing technology of blackened hexagon bolt is divided into three kinds: low temperature blackening, high temperature blackening and optical extinction blackening. 1. Low temperature blackening The product quality of low temperature blackening process of hexagon bolt is better than that of the same industry, the blackening film of the processed workpiece is firm, the [...]
What are the hardness grade of hexagon socket bolts? The cylindrical head of the hexagon socket bolt is in the shape of hexagon socket. There are many kinds of hardness grades. Users can choose according to their different needs to ensure the tightening effect of the bolt. The hardness grade of hexagon socket bolt will [...]
Proper maintenance of high strength hexagon bolts? When high strength hexagon bolt is used, it needs to cooperate with the nut to play the role of fastening. If its packaging, transportation and storage methods are improper, it is easy to cause the thread to be crushed and the bolt surface to rust and corrode. Let's [...]
How to deal with the after-sale problems of high strength hexagon bolt? High strength hexagon bolt is made of high-strength steel. It is generally used in track, bridge and high-pressure equipment. In order to ensure its firmness, sometimes it needs to be prestressed before use. However, if the product has quality problems during use, it [...]
Anti corrosion treatment method of hexagon socket bolts surface In the production of hexagon socket bolts, one of the most important links is to carry out anti-corrosion treatment on the surface. You may ask "how to carry out anti-corrosion treatment?" in fact, different corrosion conditions lead to different anti-corrosion treatment methods. Today, we will briefly [...]
A325M heavy hex bolt specification: Heavy hex bolts: Standard: A325m Grade: 4.8/5.8/6.8/8.8/10.9/12.9; grade 2 / 5 / 8.0 Specification: m6-m24; 1 / 4inch-1inch Length: 10 mm-270 mm; 1 / 2 inch-10 inches Surface treatment: natural color, blackening, galvanizing, hot galvanizing, Dacromet Packing: 25kg per carton, in bulk, 36 cartons per pallet. Or according to customer [...]
Advantages of high strength galvanized bolt High strength galvanized bolt is galvanized, so what are its advantages? Hot dip galvanizing is also used to protect the surface of screws, bolts and nuts from corrosion. Hot dip galvanized screws have better corrosion resistance than electro galvanized screws. However, high cost and high strength structural bolts are [...]
The identification methods of high strength bolt are mainly seen in five aspects: 1. Look at the mark. Generally, there is a mark on the packing box of the bolt. It can be divided into three levels: 8.8, 10.9 and 12.9. Generally, there is no grade mark on the hexagonal plane of hexagon bolt, which [...]
High Tensile 10.9 Hex Bolts Weight and Size High Tensile 10.9 Hex Bolts Weight Chart MM THREADS AS PER IS 1363/67 APPROXIMATE WEIGHT IN KGS FOR 100 NOS LENGTH DIAMETER M 5 M 6 M 8 M 10 M 12 M 14 M 16 M 18 M 20 M 22 16 mm 0.448 0.743 1.590 [...]