The difference between carbon steel pipe and ordinary steel pipe

Different in nature 1. Carbon steel pipe: It is made of steel ingot or solid round steel through perforation, and then hot rolled, cold rolled or cold drawn. 2. Stainless steel pipe: It is a hollow long round steel. 3. Seamless steel pipe: a steel pipe made of a single piece of metal with no seams on the surface. Different characteristics 1. Carbon steel pipe: Carbon steel pipe is divided into two types: hot-rolled and cold-rolled (drawn) steel pipes. Hot-rolled carbon steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes. 2. Stainless steel pipe: Among the stainless steel pipe standards, Brinell hardness is the most widely used, and the hardness of the material is often expressed by the indentation diameter, which is intuitive and convenient. But it is not suitable for steel pipes of harder or thinner steel. 3. Seamless steel pipes: According to the production method, seamless pipes are divided into hot-rolled pipes, cold-rolled pipes,

Which is better, carbon steel or steel pipe

A steel pipe is a steel material with a hollow section whose length is much greater than its diameter or circumference. According to the cross-sectional shape, it is divided into circular, square, rectangular and special-shaped steel pipes; According to the material, it is divided into carbon structural steel pipe, low alloy structural steel pipe, alloy steel pipe and composite steel pipe; According to the purpose, it is divided into steel pipes for pipelines, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment, etc.; According to the production process, it is divided into seamless steel pipe and welded steel pipe. Among them, seamless steel pipe is divided into hot rolling and cold rolling (drawing), and welded steel pipe is divided into straight seam welded steel pipe and spiral seam welded steel pipe. The steel pipe is used to transfer fluid and powder, exchange heat and produce mechanical parts and containers, what's more it's a kind of economical steel. Using steel pipes to manufacture building structure grids, pillars and mechanical supports can reduce weight, save 20-40% of metal, and realize factory-like mechanized construction. The use of steel pipes to manufacture highway bridges can not only save steel and simplify construction, but also greatly reduce the area of the protective layer, saving investment and maintenance costs.

Which is better, carbon steel or stainless steel?

In general, carbon steel has no special alloying elements added, while stainless steel has a high alloy content added for rust resistance. These two steels have different uses and cannot be compared. Carbon steel is generally stronger than stainless steel but is prone to rust. The characteristics of stainless steel: the thin and dense chromium-rich oxide film on the surface of stainless steel makes stainless steel water pipes have good corrosion resistance in all water qualities including soft water, even if they are used underground. Stainless steel can work safely for a long time at a temperature of -270°C ~ 400°C, no matter at high temperature or low temperature, it will not be harmful. Carbon steel is an iron-carbon alloy with a carbon content Wc less than 2.11%. Also called carbon steel. It also contains small amounts of silicon, manganese, sulfur and phosphorus. 1. Different corrosion resistance Although iron exists in both carbon steel and stainless steel, and iron is relatively easy to oxidize, so the corrosion resistance of welding iron materials is relatively poor, but in addition to iron, stainless steel also adds chromium, which can effectively Increase the corrosion resistance of the material, so in comparison, the corrosion resistance of stainless steel is stronger. 2. Different ductility

Types of carbon steel:

1. Carbon structural steel Features: low price, excellent process performance (such as weldability and cold formability). Application: general engineering structures and general mechanical parts. The difference between ordinary carbon steel and stainless steel Ordinary carbon steel, also known as iron-carbon alloy, is divided into low carbon steel (to be called wrought iron), medium carbon steel and cast iron according to the level of carbon content. Generally, those with a carbon content of less than 0.2% are called low-carbon steel, commonly known as wrought iron or pure iron; those with a carbon content of 0.2-1.7% are called steel; those with a content of more than 1.7% are called pig iron. The chromium content in steel is more than 12.5%, and the steel with high resistance to external medium (acid, alkali salt) corrosion is called stainless steel. According to the structure of the steel, stainless steel can be divided into martensitic, ferritic, austenitic, ferritic-austenitic, and precipitation hardening stainless steels. According to the national standard GB3280-92, there are 55 regulations in total. . In our daily life, we have more contact with austenitic stainless steel (some people call it nickel stainless steel) and martensitic stainless steel (some people call it "stainless iron", but it is unscientific, easy to misunde

What are the factors affecting carbon steel?

What are the factors affecting carbon steel? Carbon steel is an iron-carbon alloy with a carbon content of 0.0218% to 2.11%. Also called carbon steel. Generally also contain a small amount of silicon, manganese, sulfur, phosphorus. Generally, the higher the carbon content in carbon steel, the greater the hardness and the higher the strength, but the lower the plasticity. Influencing factors: 1. Manganese: about 0.25%~0.80%. Solid solution strengthening; removal of FeO to reduce the brittleness of steel; synthesis of MnS with sulfide, which can reduce the harmful effect of sulfur. beneficial. 2. Silicon: about 0.10%~0.40%, solid solution strengthening; except for the adverse effects of FeO on steel quality, it is beneficial. 3. Sulfur: FeS and Fe form a low-melting-point eutectic (melting point is 985°C), which causes steel to become brittle and crack during thermal processing at 1000-1250°C, "hot brittle". harmful. 4. Phosphorus: Increases strength and hardness, but reduces plasticity and toughness, making it "cold and brittle". harmful. Lihua was found in 1986 and has become a leading carbon steel manufacturer of houseware & small furniture now. Our product categories i

Types of carbon steel:

1. Carbon structural steel Features: low price, excellent process performance (such as weldability and cold formability). Application: general engineering structures and general mechanical parts. For example, Q235 can be used to make bolts, nuts, pins, hooks and less important mechanical parts, as well as rebar, section steel and steel bars in building structures. 2. High quality carbon structural steel Application: Non-alloy steels for manufacturing important mechanical parts are generally used after heat treatment. Commonly used steel grades and uses: 08F, low mass fraction of carbon, good plasticity, low strength, used for stamping parts such as automobile and instrument housing; 20. Good plasticity and weldability, used for parts with low strength requirements and carburized parts, such as machine covers, welding containers, small shafts, nuts, washers and carburized gears, etc.; 45, 40Mn, good comprehensive mechanical properties after quenching and tempering, used for mechanical parts with large force, such as gears, connecting rods, machine tool spindles, etc.; 60, 65Mn steel has high strength; used in the manufacture of various springs, locomotive rims, and low-speed wheels.

Classification of carbon steel:

Classification of carbon steel: (1) According to the purpose, carbon steel can be divided into three types: carbon structural steel, carbon tool steel and free-cutting structural steel, and carbon structural steel is divided into engineering construction steel and machine manufacturing structural steel; (2) According to the smelting method, it can be divided into open-hearth steel and converter steel; (3) According to the deoxidation method, it can be divided into boiling steel (F), killed steel (Z), semi-killed steel (b) and special killed steel (TZ); (4) According to the carbon content, carbon steel can be divided into low carbon steel (WC ≤ 0.25%), medium carbon steel (WC0.25%-0.6%) and high carbon steel (WC>0.6%); (5) According to the quality of steel, carbon steel can be divided into ordinary carbon steel (higher phosphorus and sulfur content), high-quality carbon steel (lower phosphorus and sulfur content) and advanced high-quality steel (lower phosphorus and sulfur content) ) and super high-quality steel. Lihua was found in 1986 and has become a leading carbon steel manufacturer of houseware & small furniture now. Our product categories include: Living Room Furniture, Home Office Furniture, Bathroom Houseware, Bedroom Furniture, Kitchen Furniture. Main products include Housewa

Which is better, particleboard or density board? (two)

First, the main advantages of surface density board: 1. Density board is easy to be painted. All kinds of paints and paints can be evenly coated on the density board, which is the first choice for paint effect. 2. Density board is a beautiful decorative board. 3. All kinds of veneer, tape film, veneer, light metal sheet, melamine board and other materials can be pasted on the surface of MDF. 4. After punching and drilling, the hard density board can also be made into a sound-absorbing board, which is used in building decoration projects. 5. The physical performance is excellent, the material is uniform, and there is no dehydration problem. Second, the main advantages of particleboard: A. It has good sound absorption and sound insulation properties; particleboard is heat-insulating and sound-absorbing; B. The interior is granular with a cross-staggered structure, the performance of each part is basically the same, and the lateral load-bearing capacity is good; C. Particleboard has smooth surface, realistic texture, uniform bulk density, small thickness error, pollution resistance, aging resistance, beautiful appearance, and can be used for variou

Which is better, particleboard or density board? (one)

Particleboard and MDF are more and more widely used in the furniture industry. When choosing particleboard or MDF, many people consider which is better, particleboard or MDF. Today, the editor will introduce particleboard and density board to you from the performance characteristics and characteristics of density board. Particleboard and MDF are more and more widely used in the furniture industry. When choosing particleboard or MDF, many people consider which is better, particleboard or MDF. Today, the editor will introduce particleboard and density board to you from the performance characteristics and characteristics of density board. Density board performance characteristics: The surface of density board is smooth and flat, the material is fine and dense, the performance is stable, the edge is firm, and the surface of the board is very decorative. However, the moisture resistance of the density board is poor, and in contrast, the nail holding power of the density board is worse than that of the particle board. If the screw becomes loose after tightening, it is difficult to fix it again because the strength of the density board is not high. Our products include: Multipurpose Storage Racks, Assembled Coffee Tables, Side Tables, Computer Tables, Tables, Chairs, Dining Tables, 3-Tier Shelves, 4-Tier Shelves, 5-Tier Shelves, Wall-Mounted Shelves, Tissue Cartridges, Storage baskets, baskets, laundry racks, etc.Living Room Furnitu

The difference between density board and particle board (two)

In real life, particleboard and MDF are often confused because they are both made of wood and fiber wood. So what are the differences between density board and particle board? Which one is more environmentally friendly? 1. The scope of application is different Due to the uniform and fine internal structure of MDF, in the furniture industry, it is widely used to replace wood processing flowers and carving products, such as European furniture door panels, hats, decorative columns, etc. Particleboard is widely used in the panel furniture industry due to its resistance to bending and deformation, high strength-to-weight ratio, good nail-holding power, and low formaldehyde content. 2. Different materials MDF uses the sawdust at the end of the forestry industry, and the material itself does not have a fiber structure at all. The layered sawdust used in particleboard retains the fibrous structure, and is specially machined from unfinished tree branches, not leftovers. 3. Different structure Particleboard is a multi-layer structure, the surface is equivalent to density board, and the density is good; the interior is layered wood chips that retain the fiber structure, and the layer structure is maintained by a specific process, which is close to the structur

The difference between density board and particle board (one)

In real life, particleboard and MDF are often confused because they are both made of wood and fiber wood. So what are the differences between density board and particle board? Which one is more environmentally friendly? The differences mainly include the following aspects: 1. The production process is different Particleboard is a wood-based panel made of wood or other wood and fiber materials that are glued together under pressure and heat; MDF is made by crushing wood and fiber materials in water and then using adhesive made. 2. The appearance is different The material cross-section of particleboard is three layers, the outer two layers are fine particles, and the middle layer has larger particles; density board is also called fiberboard, and its cross-section has the same color and particle size distribution. 3. Different characteristics Particleboard has better moisture resistance, water absorption expansion rate, and nail holding power; density board has poor moisture resistance, but has better shaping ability, and the base material of pvc adsorption door panels is mostly density board. 4. The processing technology is different

Do you know the production process of particleboard?

The production method of particleboard is divided into flat pressing method for intermittent production and extrusion method and rolling method for continuous production according to its slab forming and hot pressing process equipment. In actual production, the flat pressing method is mainly used. Hot pressing is a key process in particleboard production. Its function is to solidify the rubber in the slab, and to consolidate the loose slab into a board with a specified thickness after pressing. The process requirements are: ① Appropriate moisture content. When the water content of the surface layer is 18-20%, it is beneficial to improve the bending strength, tensile strength and surface finish, and reduce the possibility of bubbling and delamination of the slab during pressure relief. The moisture content of the core layer should be appropriately lower than that of the skin layer to maintain proper in-plane tensile strength. ②Appropriate hot pressing pressure. Pressure can affect the contact area between the shavings, the thickness deviation of the board and the degree of transfer of glue between the shavings. According to the different density requirements of the product, the hot pressing pressure is generally 1.2 to 1.4 MPa. ③ appropriate temperature. Excessive temperature will not only decompose the urea-formaldehyde resin, but also cause the slab to be partially cured in advance when the temperature is raised, resulting in waste products.

How to judge the quality of particleboard?

1. From the appearance point of view, look at the size and shape of the sawdust particles in the center of the cross section. The length is generally 5-10MM in length. If it is too long, the structure is loose, and if it is too short, the deformation resistance is poor, and the so-called static bending strength does not meet the standard; 2. The moisture resistance of wood-based panels depends on its density and moisture-proof agent. No matter how good the moisture-proof performance is when immersed in water, moisture-proof refers to moisture-proof, not waterproof, so it must be distinguished in future use. In the northern region, including The moisture content of North China, Northwest and Northeast panels should generally be controlled at 8-10%; the southern area including coastal areas should be controlled between 9-14%, otherwise the panels will easily absorb moisture and deform. 3. In terms of surface flatness and smoothness, it usually needs to be polished with about 200# sandpaper before leaving the factory. Generally, it is better to be finer up and down. Hang glue. Our products include: Multipurpose Storage Racks, Assembled Coffee Tables, Side Tables, Computer Tables, Tables, Chairs, Dining Tables, 3-Tier Shelves, 4-Tier Shelves, 5-Tier Shelves, Wall-Mounted Shelves, Tissue Cartridges, Storage baskets, baskets, laundry racks, etc.Living Room Furniture, Home Office Furniture, Bathroom Houseware, Bedroom Furniture are our main product categories.

Classification of particleboard(two)

Particleboard is divided into three types according to the product: low density (0.25-0.45 g/cm3), medium density (0.45-0.60 g/cm3), and high density (0.60-1.3 g/cm3), but most of them are usually produced with a density of 0.60 ~ 0.70 g/cm3 particleboard. According to the slab structure, it is divided into three types: single-layer, three-layer (including multi-layer), and gradient. According to the water resistance, it is divided into indoor water resistance and outdoor water resistance. According to the arrangement of the shavings in the slab, there are two types: directional type and random type. In addition, there are various particle boards made of non-wood materials such as cotton stalks, hemp stalks, bagasse, rice husks, etc., as well as cement wood wool boards and cement particle boards made of inorganic adhesive materials. There are many specifications of particleboard, and the thickness ranges from 1.6 mm to 75 mm, with 19 mm as the standard thickness. When evaluating the quality of particleboard, the physical properties often considered are density, moisture content, water absorption, thickness expansion rate, etc., and mechanical properties include static bending strength, vertical board surface tensile strength (internal bonding strength), nail-holding force elasticity Modulus and rigidity modulus, etc., the process properties include machinability, gluing, paint finishing, etc. For special-purpose particleboard, the electrical, acoustic, thermal and anti-corrosion, fire-retardant, flame-re

Classification of particleboard(one)

Particleboard is also called particle board. Various branches, small-diameter wood, fast-growing wood, sawdust, etc. are cut into pieces of a certain size. After drying, they are mixed with glue, hardener, waterproofing agent, etc., and pressed at a certain temperature and pressure. A wood-based panel with uneven particle arrangement. Although particle board is also called particle board, it is not the same board as solid wood particle board. Solid wood particle board is only similar in processing technology to particle board, but its quality is much higher than that of particle board. A. According to the purpose: Class A particleboard; Class B particleboard B. According to the particleboard structure: single-layer structure particleboard; three-layer structure particleboard; gradient structure particleboard; oriented strand board; waffle particleboard; molded particleboard. C. According to the manufacturing method: flat-pressed particleboard; extruded particleboard. According to the raw materials used: wood particle board; bagasse particle board; flax particle board; cotton stalk particle board; bamboo particle board, etc.; cement particle board; gypsum particle board. D. According to the surface condition: 1. Unfinished particleboard: sanded particleboard; unsanded particleboard. 2. Veneer particleboard: impregnated

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