What is the hardness of steel and what is the hardness of steel?

Hardness is a performance indicator that measures the softness and hardness of a material.

The hardness of steel is 130 150hrc. The hardness of steel ranges from 130 to 150HRC, which here refers to its Brinell hardness, which is an important indicator. But if it is steel that has just left the factory, it has no hardness, and the HRC here is no hardness, which is lower than HRC20, and after modulation, its hardness can reach the standard range.

Notes:The maximum bearing capacity of trapezoidal miner steel is 310kN, so for safety reasons, the operation is not to exceed this force to prevent safety accidents. The miner's steel trapezoidal support supported with the semicircular bamboo back plate not only has a high utilization rate of the roadway section.

Moreover, the deformation and damage of the bracket is less, which not only improves the reuse rate of miner steel, but also reduces the maintenance cost of the roadway. The roadway support is trapezoidal, which can effectively maintain stability and ensure construction safety to the greatest extent.

The methods used to express the hardness of steel include Shore HS, Roches HRC, Vickers HV, Brinell HB, etc. Each representation method has a corresponding ** that can be checked. The higher the carbon content of steel, the greater the hardness (ignoring the weak influence of alloying elements) T12 steel contains carbon, 20 steel is yes, so the hardness is T12>65Mn>40cr>20 This is only applicable to steel with low alloy content, if the steel alloy content is very high, it is different.

The number that starts with T is carbon tool steel, and the number after T represents the thousandth of the carbon content. 20 steel is carbon structural steel, and the number represents a few parts per 10,000 of carbon content. 40cr, 65mn is low-alloy steel, and the previous number represents a few ten-thousandths of the carbon content.

The following symbol indicates that the steel contains about 1% of this element. If the number in front of the steel number is a single digit, it does not represent the fraction of a thousand of the carbon content, but a fraction of a thousand. The number after the alloying element represents the percentage of the element's content.

For example, 9cr18mo, which represents carbon, chromium 18%, molybdenum 1%.

Hope it helps, dear

There are Brinell (HB), Rockwell (HRC), Vickers (HV), Leeb (HL) hardness, etc., among which HB and HRC are more commonly used. HB has a wide range of applications, and HRC is suitable for materials with high surface hardness, such as heat treatment hardness, etc. The difference between the two is that the probe of the hardness tester is different, the probe of the Brinell hardness tester is a steel ball, while the probe of the Rockwell hardness tester is diamond.

Brinell hardness (HB) is generally used when materials are soft, such as non-ferrous metals, steel before heat treatment or annealing. Rockwell hardness (HRC) is generally used for materials with higher hardness, such as hardness after heat treatment.

Classified by high and low carbon content.

Low carbon steel: the carbon content is generally lower than the mass fraction);

Medium carbon steel: carbon content is generally mass fraction);

High carbon steel: the carbon content is generally higher than the mass fraction).

Classified by quality.

1) Ordinary steel (p,s.)

2) High-quality steel (P, S are high-grade high-quality steel (P, S

The hardness of steel ranges from 130 to 150HRC, and here it is Brinell hardness, which is an important indicator. However, if it is steel that has just left the factory, there is no hardness, and the HRC here is no hardness, which is lower than HRC20, and the hardness can reach the standard range after modulation.

Because there are also different types of steel, such as carbon steel. According to the use, there are tool steel or structural steel, etc., so the hardness is not the same. It can also be determined in combination with the smelting method or carbon content, so some hardness is relatively high, and some hardness is slightly lower.

The carbon content of low-carbon steel is less than that of carbon structural steel, and the carbon content is mostly below.

Medium carbon steel carbon content in carbon tool steel carbon content is generally in.

High-carbon steel has a carbon content greater than.

The carbon content of stainless spring steel is generally in, and the chromium content is greater than 13%.

The carbon content of rolling bearing stainless steel is generally 1%, and the chromium content is greater than 13%.

High-speed steel, also known as front steel, has a carbon content of generally containing tungsten, and the hardness can be maintained above HRC60 when working at 600 degrees Celsius.

Iron is harder because of its high carbon content.

Iron and steel are both iron-carbon alloys, and the higher the carbon content, the harder the texture, and the more brittle they are; The lower the carbon content, the better the toughness.

Iron-carbon alloy is a binary alloy composed of iron and carbon. Carbon steel and cast iron, the most widely used category of iron-based materials, are industrial iron-carbon alloy materials. The reason for the wide range of application of steel materials is, first of all, that the available components range widely, from nearly carbon-free industrial pure iron to cast iron with a carbon content of about 4%, and the phase structure and microstructure of the alloy have undergone great changes in this range; In addition, various thermal processing techniques, especially metal heat treatment technology, can be used to greatly change the structure and properties of a certain component alloy.