There are 10 kinds of heat treatment methods for American hexagon socket bolts 1. Normalizing: the steel or steel parts are heated to the appropriate temperature above the critical point AC3 or ACM for a certain time and then cooled in air to obtain pearlite structure. 2. Annealing: the hypoeutectoid steel workpiece is heated to [...]
Heat treatment high strength fasteners should be quenched and tempered according to the technical requirements. The purpose of heat treatment quenching and tempering is to improve the comprehensive mechanical properties of fasteners, so as to meet the tensile strength value and yield ratio specified by the product. Heat treatment process has a crucial impact on [...]
Heavy duty hexagon bolt: 1. Standard: A325M 2. Grade: 4.8 / 5.8 / 6.8 / 8.8 / 10.9 / 12.9 , grade 2 / 5 / 8 3. Specification: m6-m24, 1 / 4 inch-1 inch 4. Length: 10mm-270mm, 1 / 2 inch-10 inches 5. Surface treatment: natural color, blackening, galvanizing, hot galvanizing, Dacromet 6. Packing: [...]
As for the process of high strength blackening bolt, it is a blackening treatment process at room temperature, which can be divided into the following procedures. The first step is to clean the surface of high strength bolts. After that, the degreasing process is started. The high strength bolt must be completely immersed in the [...]
The following problems should be paid attention to in the construction of high strength bolts: (1) Surface rust, oil stain, burr and weld bead on bolt hole wall shall be cleaned. (2) After treatment, the contact friction surface shall meet the requirements of anti scratch coefficient. The high-strength bolts used shall be matched with nuts [...]
Dacromet bolt coating- apply coating (colored coating, Dacromet) on the workpiece as required, with appearance of silver, black or color, and salt spray test for more than 240 hours. Dacromet: the appearance of Dacromet coating is uniform silver gray. The coating contains 80% thin zinc sheet and aluminum sheet, and the rest is chromate. It [...]
The manufacturing process of stainless steel hexagon bolts is as follows: Normalizing: the screw is heated to the appropriate temperature above the critical point AC3 or ACM for a certain time and then cooled in air to obtain pearlite structure. Annealing: the hypoeutectoid screw is heated to 20-40 ℃ above AC3 and cooled slowly in [...]
As one of the most widely used connection methods in wind power equipment, high-strength wind power bolt and nut connection has the advantages of simple construction, disassembly and replacement, good stress and fatigue resistance. The domestic high strength bolt connection construction method generally adopts the torque method. At present, most of the domestic mainstream wind [...]
The blackening treatment of high strength bolts mainly requires the appearance, including the following points: 1. The appearance of blackening treatment is blue black or dark black. 2. The crystal of the film is compact and uniform, and the product has no exposed bottom, no obvious color difference, no whitening and other abnormal phenomena. If [...]
The installation and use of hexagon head bolts are directly related to the quality and service life of fasteners, and the safety of bolts is the primary consideration. The main factors affecting the hexagon head bolt: the selection of material, thickness of steel plate, processing and cutting, surface coating and installation of steel structure shall [...]
The hot-dip galvanized hexagon screw is to place the bolt in the high-temperature zinc solution of 600 ℃ so that its surface is coated with a dark gray surface. The advantages of hot-dip galvanized hexagon screw are strong adhesion of zinc coating, thick coating and strong corrosion resistance. Hot dip galvanized bolts are used for [...]
Production process of high strength black bolt: Rack mounting → oil removal by boiling alkali solution → water cleaning → rust removal by hydrochloric acid solution → water cleaning → boiling water heating → oxidation → water cleaning → saponification → water cleaning → self drying → hot oil soaking → oil control → inspection [...]
From the following three aspects, the difference between high strength hexagon bolt and ordinary bolts is introduced. In terms of strength grade High strength hexagon bolts are widely used. The strength grades of 8.8s and 10.9s are commonly used, of which 10.9 is the most. The strength grade of ordinary bolts is lower, generally 4.4, [...]
As a small hardware component, high strength hexagon socket bolt is widely used, ranging from a small electronic product and mechanical equipment to automobiles, airplanes, ships, etc., which need to move to high-strength hexagon bolts. In addition, the high-strength hexagon bolt is applied to the following industries: electronic industry, electrical industry, electrical industry, power industry, [...]
When drawing the Thread Hole of Heavy Hex Bolt, use two thick solid lines, close the end with a triangle (also thick solid line), then offset two thin solid lines (offset distance is thread depth) outwards, and close the front of the triangle with a thin solid line. In addition, the following three points should [...]
In the work, we can often see the hot dip galvanized hexagon bolt, because it has many advantages, making it popular with customers, and rapid development in the market. Generally speaking, the top surface of the head of the hot-dip galvanized hexagon bolt is marked with convex or concave characters, or the side of the [...]
Bolt Classification Knowledge This time Fastener Bolt Exporter talks about bolt information other than threads. There are many types of bolts, and there are probably several classification methods: classification by the head of the bolt; classification by the material; classification by the performance level; classification by the connection force method. The first category is classified [...]
Galvanized Steel Hex Bolts and Nuts DIN933 Product Name Hexagon Bolt Material stainless steel/carbon steel Size Dia.:5mm~20mm,1/4″~9/16″;:L:8mm~200mm,5/16″~8″ Standard DIN GB ISO JIS BA ANSI Grade 4.8 6.8 8.8 10.9 12.9 Finish plain, zinc plated, black oxide, black phosphated Thread standard Used building industry machinery Galvanized Steel Hex Bolts and Nuts DIN933 FAQ 1.Why [...]
Product name DIN 6914 Heavy Hex Bolt Black Finish Standard DIN 6914 Material Carbon Steel, Alloy Steel, Stainless Steel etc. Size M12-M42 Class Gr.10.9 Surface Treatment Plain, Black Oxide, Zinc Plated(Yellow), H. D. G. etc. Delivery Lead Time Generally 30-45 workdays Certificate ISO9001:2008 Package 25kgs per BOX, 36 boxes per Pallet Sample FREE SAMPLE will [...]
Stud Bolt Size Range From M1.6 up to M52 Material Code: Carbon steel , Alloy steel, Stainless steel ASTM A193/A194 Coating Blackening, H.D.G., Water-based Epoxy, HDPE, Fluorocarbon Coating, XYLAN Threaded type UNC, Metric, BSW Standard ANSI/ASME , JIS, EN, DIN, BS,GB, SH, HG ETC. Packaging: Plywood Cases or per customer’ s requirement Quality High Level [...]