The magnitude relationship between the tensile tensile and compressive strength of mild steel

The tensile and compressive strength of mild steel is approximately equal, and the torsional strength is smaller (about 3 times the root number). Cast iron is different in that it has the largest compressive strength, while others are much smaller.

The annealed structure of mild steel is ferrite and a small amount of pearlite, which has low strength and hardness, and good plasticity and toughness. Therefore, its cold formability is good, and it can be cold formed by crimping, bending, stamping and other methods. This steel also has good weldability.

Steel with a carbon content ranging from low carbon is susceptible to a variety of machining such as forging, welding and cutting.

Mild steelThe formula for yield torque is, re=fe so.

When the curve reaches point d, the deformation increases significantly at the uneven or defective part of the material where the specimen is relatively weak, and the effective cross-section decreases sharply, resulting in necking. Thereafter, the axial orientation of the specimen.

The deformation is mainly concentrated in the necking, and the specimen is finally pulled off at the necking.

When the applied torque does not exceed the elastic range, the deformation is elastic and the bright MN curve is a straight line. When the shear stress at the edge.

When the shear yield limit is reached, the corresponding torque is MP. The stresses on the cross-section are distributed in a linear pattern, and the shear stress on the surface is the largest. <>

After exceeding the elastic range, the specimen begins to yield. The yield process is gradually carried out from the surface to the center of the circle, at this time the MN curve begins to bend, the plastic region of the cross-section gradually expands to the center of the circle, the stress on the cross-section is no longer a linear distribution After the overall yield of the specimen, a yield plateau appears on the MN curve, and the minimum yield torque indicated by the active pointer is recorded as ms.

After exceeding the elastic range, the specimen begins to yield. The yield process is gradually carried out from the surface to the center of the circle, at this time, the mn, curve begins to bend, the plastic zone of the cross-section gradually expands to the center of the circle, the stress on the cross-section is no longer a linear distribution after the overall yield of the specimen, the yield platform appears on the mn, curve, and the minimum cavity silver yield torque indicated by the active pointer is recorded as ms.

When the curve reaches point d, the deformation increases significantly in a certain part of the specimen that is relatively weak, and the effective cross-section decreases sharply, resulting in necking. Thereafter, the axial orientation of the specimen.

The deformation is mainly concentrated in the necking, and the specimen is finally pulled off at the necking. Wu Xian Banquet.

Introduction to torsional yield torque

When the applied torque does not exceed the elastic range, the deformation is elastic, and the mn, curve is a straight line. When the shear stress at the edge.

When the shear yield limit is reached, the corresponding torque is MP. The stresses on the cross-section are distributed in a linear pattern, and the shear stress on the surface is the largest.

In the yield phase AB, the specimen begins to yield after exceeding the elastic range. The yield process is gradually carried out from the surface to the center of the circle, at this time, the mn, curve begins to bend, the plastic zone of the cross-section gradually expands to the center of the circle, the stress on the cross-section is no longer a linear distribution after the overall yield of the sample, the mn, the yield platform appears on the curve, and the minimum yield torque indicated by the active pointer is recorded as ms.

When the applied torque does not exceed the elastic range, the deformation is elastic, and the mn, vertical curve is a straight line. When the shear stress at the edge reaches the shear yield limit, the corresponding torque is MP. The stresses on the cross-section are distributed in a linear pattern, and the shear stress on the surface is the largest.

After the yield stage, the Mn curve begins to rise again, indicating that the material has regained its ability to resist deformation, that is, the torque of the material must continue to increase in order to continue to deform. Mild steel

There is a long strengthening phase, but there is no neck contraction until it breaks.

Medium carbon steelCompressive strengthfor 735MPa,Medium carbon steel has stronger and harder strength than low carbon steel.

High, and crack plasticity and toughness are lower than low carbon steel, can be used without heat treatment, directly use hot rolled materials, cold drawn materials, can also be used after heat treatment, quenched, tempered medium carbon steel has good comprehensive mechanical properties, so the rotten source is done in the medium strength level of hunger balance of various uses, medium carbon steel is the most widely used, in addition to as a building material, but also a large number of manufacturing a variety of mechanical parts.

Characteristics of medium carbon steel

High-strength medium carbon quenched and tempered steel, with a certain plasticity, toughness and strength, good machinability, good comprehensive mechanical properties after quenching and tempering treatment, poor hardenability, easy to produce cracks, low welding performance, need to be well preheated before welding, and heat treatment is required after welding.

Medium carbon steel is mainly used to make higher strength moving parts, such as air compressors.

Pistons for pumps, impellers for steam turbines, shafts, worms, gears for heavy machinery, wear-resistant parts on the surface, crankshafts.

Machine tool spindles, rollers, fitter tools, etc.

Hello dear, I'm glad to serve you, and will try to help you answer it!The tensile strength of low-carbon steel is better than that of high-carbon steel, high-carbon steel is hard and brittle, and often uses the base of the machine to play the light or rails, etc., low-carbon steel is hard and tough, and the strength of low-carbon steel is stronger than that of high-carbon steel in front of the hall. The difference between the two different materials of high-carbon steel and low-carbon steel is still relatively obvious, first of all, from the perspective of carbon content, the content of high-carbon steel is between, and the content of low-carbon steel is generally less.

Secondly, from the perspective of hardness, high-carbon steel is relatively hard, while low-carbon steel has a relatively low degree of hardness, so it is also softer, and there is another scientific name called soft steel. I hope I can help you, if you don't know anything, you can continue to ask, no need to end the consultation, I will answer for you as soon as possible, if you feel satisfied pro can help give a 5-star like, your satisfaction is my biggest motivation, thank you!

Summary. In order to improve the properties of steel, on the basis of smelting carbon steel, some alloying elements are added to make steel, such as chromium steel, manganese steel, chromium-manganese steel, chromium-nickel steel, etc. According to the total content of its alloying elements, it can be divided into:

1. Low-alloy steel - the total content of alloying elements is 5%. 2. Medium alloy steel - the total content of alloying elements is 5% to 10%. 3. High-alloy steel - 10%.

According to the different added elements and the appropriate processing technology, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, and non-magnetic can be obtained.

Hello, I'm an Internet expert, Night Rain.

Carbon is the most important factor in the mechanical performance of jujube code sensitive steel, with the increase of carbon content, the hardness increases, and the plasticity and toughness decrease. When the carbon content increases, the strength decreases.

In order to improve the properties of steel, on the basis of smelting carbon steel, some alloying elements are added to make steel, such as chromium steel, manganese steel, chromium-manganese steel, chromium-nickel steel, etc. According to the total content of its alloying elements, it can be divided into: 1. Low-alloy steel - the total content of alloying elements is 5%.

2. Medium alloy steel - the total content of alloying elements is 5% to 10%. 3. High-alloy steel - 10%. According to the different added elements and the appropriate processing technology, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, and non-magnetic can be obtained.

The general tensile strength of carbon steel is 235MPa.

Compared with other steel types, carbon steel is the earliest used, with low cost, wide performance range, and the largest amount. It is suitable for water, steam, air, hydrogen, ammonia, nitrogen and petroleum products with nominal pressure pn and temperature of -30-425. Commonly used grades are WC1, WCB, ZG25 and high-quality steel and low-alloy structural steel 16Mn.

In the annealed or hot-rolled state, with the increase of carbon content, the strength and hardness of the steel increase, while the plasticity and impact toughness decrease, and the weldability and cold bending become worse. Therefore, the steel used in engineering structures often limits the carbon content, and the residual elements and impurity elements in carbon steel, such as manganese, silicon, nickel, phosphorus, sulfur, oxygen, nitrogen, etc., also have an impact on the properties of carbon steel. These influences sometimes reinforce each other, and sometimes cancel each other out.

Dear, I am glad to answer for you: Is the tensile strength of high-strength steel plate higher than that of low-carbon steelAnswer: The tensile strength of high-strength steel plate is higher than that of low-carbon Qinggang, and the tensile strength of high-strength steel plate is generally more than 600MPa, which is 2 3 times that of low-carbon steel, so it is called high-strength steel plate.

It is a flat steel made by pouring molten steel, cooling it, and pressing it. It is flat, rectangular and can be rolled directly or sheared from wide steel strips. Steel plates are divided according to thickness.