Which is better, FRP or stainless steel?

Are you talking about a water tank? If you talk about drinking water, you still choose stainless steel water tank, FRP water tank is suitable for fire water, stainless steel material is more expensive than FRP water tank material.

"FRP" and "stainless steel" are two completely different materials, the former is a non-metallic composite material, while the main component of the latter is metallic iron. Both have their own strengths and are used in different occasions, so it is impossible to simply compare which one is better.

Look at the use in**.

As a plastic product, FRP has excellent corrosion resistance, and high lightweight material characteristics, insulation, and no electromagnetic properties. However, the resistance to natural aging and high temperatures is poor.

Stainless steel has good corrosion resistance, high temperature resistance and mechanical properties.

It has a wide range of uses.

Therefore, whether FRP and stainless steel are good depends on the use of **. For example, the bracket of the radar can be made of stainless steel, but the radome can never be made of stainless steel, and the use of fiberglass is not a big problem.

FRP does not belong to metal, it is made of chemical fiber mesh and epoxy resin cementing agent multi-layer bonding, with greater toughness, certain corrosion resistance, and long life.

However, the mechanical strength of FRP is far less than that of stainless steel, and it is more afraid of sharp weapon scratches. FRP and stainless steel have their own characteristics, and they should be selected according to their characteristics.

1. Low modulus of elasticity

The modulus of elasticity of FRP is twice as large as that of wood, but it is 10 times smaller than that of steel (e=, so it often feels that it lacks rigidity and is prone to deformation in the product structure.

It can be made into a thin shell structure, a sandwich structure, or made up for by high-modulus fibers or stiffeners.

2. Long temperature resistance is poor

Generally, FRP can not be used for a long time at high temperatures, and the strength of general-purpose polyester FRP is significantly reduced above 50, and it is generally only used below 100; The general-purpose epoxy FRP is above 60, and the strength is significantly reduced. However, it is possible to choose a high-temperature resistant resin that makes long-term operating temperatures between 200 and 300 possible.

3. Aging phenomenon

Aging is a common defect of plastics, and FRP is no exception, which can easily lead to performance degradation under the action of ultraviolet rays, sand, rain and snow, chemical media, mechanical stress, etc.

4. Low shear strength

The interlaminar shear strength is borne by the resin, so it is very low. The interlayer adhesion can be improved by selecting the process, using coupling agents, etc., and the most important thing is to avoid interlayer shearing as much as possible when designing the product.

FRP Usage:

FRP is a composite material that has developed rapidly in the past 50 years. 70% of the production of fiberglass is used to make fiberglass. FRP has a high hardness and is much lighter than steel. It is used as a fuel tank and pipe in jet aircraft, which can reduce the weight of the aircraft.

FRP is easy to process, stainless and rotten, and does not need to be painted. China has widely used FRP to manufacture various small motorboats, lifeboats, yachts, and automobile manufacturing, saving a lot of steel. Because FRP is a composite material, its performance is very wide adaptable, so its market development prospects are very broad.

.Disadvantages: Low modulus of elasticity The modulus of elasticity of FRP is twice as large as that of wood, but it is more elastic than steel (e= It can be made into a thin shell structure, a sandwich structure, and can also be compensated by high-modulus fibers or stiffeners. Poor long-term temperature resistance.

The stainless steel and glass health conditions are as follows:

1. The glass cup is a little healthier than the stainless steel thermos cup. Stainless steel corrodes and has heavy metal residues.

2. The glass will never have impurities dissolved into the water. Stainless steel is an alloy product, and the trace metal elements contained in it are different according to different uses, such as nickel, chromium, carbon, manganese, silicon, aluminum, etc.

3. But from another point of view, the iron element of the stainless steel cup is beneficial to the human body, and the iron element is the metal element that the human body must ingest daily. This is also the same reason why the pot for stir-frying is good for iron pots. But the texture and quality of stainless steel cups are uneven, and I can't guarantee that the stainless steel cups you use are of high quality.

Stainless steel cups are alloy products, and improper use will release the heavy metal substances contained in them, which is harmful to health. In daily use, it is not a big problem to pour ordinary water in a stainless steel cup, but do not fill acidic drinks, such as juice, coffee, carbonated drinks, etc., because it is easy to precipitate heavy metal substances, so it is not safe to drink ordinary water even if it is used again.

How to choose a thermos flask?

1. Pour boiling water into the thermos cup and tighten the cork or cup lid clockwise for 2 3 minutes and then touch the outer surface of the cup body with your hands, if the cup (pot) body has obvious heating phenomenon, especially the lower part of the cup body is heated, it means that the product has lost the vacuum degree and can not achieve a good thermal insulation effect, and the lower part of the insulated cup is always cool. Myth: Some people use their ears to hear whether there is a sizzling sound to determine its thermal insulation performance, and the ears cannot hear whether it is vacuum.

2. After adding water to the cup (pot), tighten the cork or lid in the clockwise direction, and place the cup (pot) flat on the table, so that there should be no water seeping; The screw-in and screw-out of the cup (pot) lid and cup mouth should be flexible and there should be no gap. Fill a glass of water and turn upside down.

Four or five minutes, or a few hard shakes, can be used to verify whether there is a water leak.

Hello, stainless steel is an alloy material made by alloying elements such as iron, chromium, nickel, molybdenum, etc. In general, the quality of stainless steel mainly depends on factors such as its composition and production process.

Common types of stainless steel are: 301 stainless steel, 304 stainless steel, 316 stainless steel, etc. 304 stainless steel is widely used in family kitchens, hotels, medical and health care, chemical industry and other fields because of its excellent corrosion resistance and mechanical properties.

In addition, there are some types of stainless steel, such as 316L ultra-low carbon stainless steel, 2205 duplex stainless steel, etc., which are suitable for specific related fields.

Therefore, the choice of stainless steel grade depends on factors such as its suitability for different application areas and use environments.

Sell scrap and go to the scrap house, I'll come to your problem].

304 is a versatile stainless steel that is widely used in equipment and parts that require good overall properties (corrosion resistance and formability).

301 stainless steel exhibits significant work hardening upon deformation and is used in a variety of applications where high strength is required.

302 Stainless Zhibi Steel is essentially a variant of 304 stainless steel with a higher carbon content, which can be obtained by cold rolling.

302B is a stainless steel with a high silicon content, which has high resistance to high-temperature oxidation.

303 and 303SE are free-cutting stainless steels containing sulphur and selenium respectively, and are used where easy machinability and high brightness are the main requirements. 303se stainless steel is also used in the manufacture of parts that require hot heading, as it has good thermal workability under these conditions.

304L is a variant of 304 stainless steel with a lower carbon content and is used in applications where welding is required. The lower carbon content minimizes the precipitation of carbides in the heat-affected zone close to the weld, which can lead to intergranular corrosion (weld erosion) in stainless steel in certain environments.

304N is a nitrogen-containing stainless steel, and nitrogen is added to improve the strength of the high steel per acre.

305 and 384 stainless steels contain high nickel and have a low work hardening rate, making them suitable for a wide range of applications where cold formability is required.

308 stainless steel is used to make welding rods.

and 330 stainless steel, the nickel and chromium content are higher than that of Haoxiaohong, in order to improve the oxidation resistance and creep strength of the steel at high temperatures. 30S5 and 310S are variants of 309 and 310 stainless steel, but with a lower carbon content to minimize carbide precipitation near the weld. 330 stainless steel has a particularly high resistance to carburizing and thermal shock

Type 316 and 317 stainless steels contain aluminum, which greatly outperforms 304 stainless steel in marine and chemical industry environments. Among them, the 316 stainless steel variants include low-carbon stainless steel 316L, nitrogen-containing high-strength stainless steel 316N, and high-sulfur free-cutting stainless steel 316F.

and 348 are stainless steel stabilized with titanium, niobium plus tantalum and niobium respectively, which are suitable for use as welding components at high temperatures.

1. Plastic steel and FRP each have their own advantages, and FRP is mostly used in machinery manufacturing, vehicles, ships and other industrial fields; In furniture decoration, plastic steel profiles are mostly used.

2. About FRP.

FRP generally refers to the matrix of glass fiber reinforced unsaturated polyester, epoxy resin and phenolic resin. Due to the different types of resins used, it is known as polyester FRP, epoxy FRP and phenolic FRP. Its characteristics are:

Light and hard, non-conductive, stable performance, high mechanical strength, less utilization, corrosion resistance. It can be used instead of steel to make machine parts and shells of automobiles and ships.

3. About plastic steel.

Plastic steel profile is referred to as plastic steel, and the main chemical composition is PVC, so it is also called PVC profile. It is a new type of building material that is widely used, because of its physical properties such as rigidity, elasticity, corrosion resistance, and excellent aging resistance, it is usually used as a good substitute for copper, zinc, aluminum and other non-ferrous metals.

It is mainly used in the application of push-pull, swing doors and windows, guardrails, pipes and ceiling materials in housing construction, and is also widely used in automobile engine protection plates through new technological processes, which is not only light in weight, but also has good toughness and excellent properties of rigidity.

Summary. The best stainless steel is 316 stainless steel: because it contains 10 nickel, it is more durable and corrosion-resistant, and it is commonly known as medical stainless steel, which will not precipitate metal ions during use.

The best stainless steel is that, and the best stainless steel is 316 stainless steel: because it contains 10 nickel, it is more durable and corrosion-resistant, and it is commonly known as medical stainless steel, which will not precipitate metal ions during use.

316 stainless steel, due to the addition of MO, has particularly good corrosion resistance, atmospheric corrosion resistance and high temperature strength, and can be used under harsh conditions; Excellent work hardening (non-magnetic). seawater utilization equipment, chemical, dyes, papermaking, oxalic acid, fertilizer and other production equipment; Photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts. 316 Stainless Steel Chemical Composition:

c,si,mn,p,s,,stainless steel mechanical properties,tensile strength (mpa) 620min,yield strength (mpa)310min,elongation (%)30min,area reduction (%)40min,density of 316 stainless steel, austenitic stainless steel generally uses this value.

304 stainless steel is better than 410 stainless steel.

304 stainless steel, i.e. 18 8 stainless steel. The GB grade is 0Cr18Ni9. The high temperature resistance is also relatively good, and it can reach 1000-1200 degrees.

304 stainless steel has excellent stainless corrosion resistance and good intergranular corrosion resistance. For oxidizing acids, it was found in experiments that 304 stainless steel has strong corrosion resistance in nitric acid below the boiling temperature of concentration 65.

It also has good corrosion resistance to alkaline solutions and most organic acids and inorganic acids.

The advantages of 304 stainless steel are mainly manifested in:

1. The surface is beautiful and the use possibilities are diversified.

2. It has good corrosion resistance and is more durable than ordinary steel.

3. Good corrosion resistance.

4. High strength, so the possibility of using thin plate is large.

5. High temperature oxidation resistance and high strength, so it can resist fire.

6. Normal temperature processing, that is, easy plastic processing.

7. Because there is no surface treatment, it is simple and easy to maintain.

8. Clean and high finish.

9. Good welding performance.

304 stainless steel is mostly used in household products: tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs, auto parts (windshield wipers, mufflers, molded products), medical appliances, building materials, chemicals, food industry, agriculture, ship parts, etc.