Question 2: Which high-strength bolts are made of high-strength materials? Yu Wenlong, a fastener consultant, thinks that the screws, nuts and washers of high-strength bolts are made of high-strength steel, such as 45 steel, 40 boron steel, 20 manganese titanium boron steel, 35CrMoA and so on. Yu Wenlong, a fastener consultant, thinks that alloy steels are commonly used for high-strength bolts, such as B7 and B7M in the American standard of 30CrMoA 35CrMoA 42CrMoA, and these are chromium-molybdenum steels, and of course there are stainless steels, such as B8M, A4-80, B8, A2-80 and carbon steel.
Yu Wenlong, a fastener consultant, thinks it's best to look up relevant information yourself. Everything I got online was fake. If you don't know what you pretend to know, it will hurt you directly. The light products are unqualified, and the heavy ones will be fined. Of course, Yu Wenlong, the fastener consultant, thinks that if you have the strength, it is also a good choice to ask the fastener consultant to refer to your technology, grasp the development direction of the enterprise, locate products and customers.
Question 3: What is the strength grade of the screw? The strength of the screw is divided into grades above 10, such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9.
Among them, bolts of grade 8.8 and above are made of low-carbon alloy steel or medium-carbon steel and subjected to heat treatment (quenching and tempering treatment), which are generally called high-strength bolts, and the rest are generally called ordinary bolts.
The bolt performance grade label consists of two parts of numbers, which respectively represent the nominal tensile strength and yield ratio of bolt materials. ?
Question 4: How to choose high-strength bolts 1? The maximum tensile strength of high strength bolts is closely related to quenching treatment. It is generally difficult to meet the material requirements of 10.9S high-strength bolts after 40Cr quenching treatment. In less strict inspection, the maximum tensile strength of materials can be judged according to the surface hardness after quenching. In addition to the different properties during treatment, the delayed fracture properties of high-strength bolts of different materials are also different under high stress.
2。 40Cr high-strength bolts are mainly used in bolted spherical joint space grids, and their design strength is generally 390 MPa (D >: =30mm) or 430MPa(d Question 5: Which high-strength bolts are made of high-strength materials? Yu Wenlong, a fastener consultant, believes that the screws, nuts and washers of high-strength bolts are made of high-strength steel, such as No.45 steel, No.40 boron steel, No.20 manganese titanium boron steel, 35CrMoA and so on. Yu Wenlong, a fastener consultant, thinks that alloy steels are commonly used for high-strength bolts, such as B7 and B7M in the American standard of 30CrMoA 35CrMoA 42CrMoA, and these are chromium-molybdenum steels, and of course there are stainless steels, such as B8M, A4-80, B8, A2-80 and carbon steel.
Yu Wenlong, a fastener consultant, has been engaged in the screw industry for more than ten years, and has been engaged in technology, quality inspection, quality assurance, procurement, business and other work in the screw industry, and has accumulated rich industry experience and a large number of technical data, customer data and supplier data. Fastener consultant Yu Wenlong provides paid consulting services, such as standard consulting, customer-oriented consulting, product positioning consulting, supplier information consulting, business development consulting, and paid consulting and consulting services for all related matters in the screw industry.
Yu Wenlong, a fastener consultant, thinks it's best to look up relevant information yourself. Everything I got online was fake. If you don't know what you pretend to know, it will hurt you directly. The light products are unqualified, and the heavy ones will be fined. Of course, Yu Wenlong, the fastener consultant, thinks that if you have the strength, it is also a good choice to ask the fastener consultant to refer to your technology, grasp the development direction of the enterprise, locate products and customers.
Question 6: What is the best material for10.9 grade bolts? 10.9 grade high-strength bolts use stainless steel wires, such as 45 # steel. When the screw is heat treated, it is hardened by C 1035. This hardening method can generally reach the high strength of 22-32 hours RC.
The steel wire used for high-strength bolts is 45 # steel. When the screw is hardened by C 1035 during heat treatment, the high strength of RC can generally reach 22-32 hours. For high-strength bolts, it can be said that it is our company's flagship product, and the technical requirements are very good in design, production links, wire selection and so on. Its purpose is to make customers feel comfortable when using this screw.
Question 7: What material is used for high temperature resistant bolts? 35CrMo .
35CrMo is the specification number of alloy structural steel (alloy quenched and tempered steel), which is mainly used to manufacture important parts in various machines subjected to impact, bending and torsion and high load.
Manufacturing use
It is used to manufacture important parts in various machines that are subjected to impact, bending and high load, such as herringbone gears of rolling mills, crankshafts, hammer rods, connecting rods, fasteners, main shafts and axles of steam turbines, transmission parts of engines, large motor shafts, perforators in petroleum machinery, bolts for boilers with working temperatures below 400 degrees Celsius, nuts with working temperatures below 565,438+00 degrees Celsius, and high-pressure seamless thick-walled conduits in chemical machinery. It can also be used to manufacture high-load transmission shafts, turbine engine rotors, large-section gears and support shafts (diameter less than 500MM) instead of 40CrNi. Process equipment, materials, pipelines, welding materials, etc.
Used as an important structural part working under high load, such as the transmission parts of vehicles and engines; Rotor, main shaft, heavy-duty transmission shaft and large-section parts of turbogenerator.
Question 8: What is the material of 8:M8 high-strength zinc screw? What is the material of m8 high strength zinc screw? Yu Wenlong, a fastener consultant, thinks that the key to m8 high-strength zinc screw depends on how high and high-strength screw you are. If it's only 8.8-grade high-strength screws, 35# steel will do. Yu Wenlong, a fastener consultant, thinks it's best to look up relevant information yourself. Everything I got online was fake. If you don't know how to pretend, you can answer casually. It is simply false or deceptive, which will directly mislead you and even hurt you. The light products are unqualified, and the heavy ones will be fined. Of course, Yu Wenlong, the fastener consultant, thinks that if you have the strength, it is also a good choice to ask the fastener consultant to refer to your technology, grasp the development direction of the enterprise, locate products and customers.
Question 9: What is the material of 8.8 grade high strength bolt? Grade 8.8 is a steel grade, and many materials can reach this steel grade after heat treatment. Commonly used are 45# steel and 35CrMo steel.
Question: 10: 12.9 grade high-strength bolt, what material is better? Yu Wenlong, a fastener consultant, thinks that 42CrMo material is better for 12.9 grade high-strength bolts, and 35CrMo is also acceptable. Yu Wenlong, a fastener consultant, thinks it's best to look up relevant information yourself. Everything I got online was fake. If you don't know how to pretend, you can answer casually. It is simply false or deceptive, which will directly mislead you and even hurt you. Of course, Yu Wenlong, the fastener consultant, thinks that if you have the strength, it is also a good choice to ask the fastener consultant to refer to your technology, grasp the development direction of the enterprise, locate products and customers.
How to do a good job in screw and nut factory? Yu Wenlong, a fastener consultant, believes that the screw and nut factory wants to do a good job. First, we should locate customers and products, and also make screws and nuts. Because customer orientation is different and the product targets are different, the sales price of the same screw and nut is several times different. Fastener consultant Yu Wenlong believes that the second is to do a good job in sales. As long as the boss knows how to share profits, there will be a large number of talents to join, and talents will have sales. The third is to save costs, mainly to reduce procurement costs, reduce sales costs and reduce production costs. The fourth is to hire fastener consultants.