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Stainless steel thick - walled pipes the role of C carbon, one of the main chemical elements

C is an industrial chemical in the main chemical composition of a kind of stainless steel, stainless steel and performance of the organization in the most extent, depends on the carbon content in steel and its distribution in the form of the influence of the carbon in the thick wall stainless steel pipe is particularly significant.Carbon in the stainless steel on its influence is mainly manifested in two aspects, 1. Carbon austenitic stainless steel is stable performance of the elements, and the degree of its role is very big (about 30 times of Ni), on the other hand, due to the affinity of C and Cr is large, complex carbide and Cr form another.

Cr is the element that forms ferrite, and its content is less than 0.08% in the absence of C. Chromic steel is ferrite tissue.When the chrome-containing steel is heated at a high C level, the austenitic structure of the chrome-containing steel is formed, which can be fully hardened.So we can conclude that C of thick wall tube of stainless steel influence is very strong, this is mainly embodied in the thick wall tube of stainless steel for the strength of the mechanical performance of the stainless steel pipe containing C increases, this is a C in one stainless steel pipe.

SO, from the perspective of the strength and corrosion resistance of stainless steel thick wall pipe, the role of C in stainless steel is relative.Knowing the rule, we can choose stainless steel thick wall pipe with different C content from different practical angles.Industry on the use of stainless steel is one of the most, the most commonly used of cr13 stainless steel 0 ~ 4 cr13 these five steel grade standard chrome gauge for 12 ~ 14%, is to put the carbon and chromium chemical reaction of chromium carbide factors into consideration before decision, its main is to consider is to make C combined with chromium as chromium carbide, chromium content is not less than 11.7% of solid solution a minimum chromium content.

Stainless steel has good corrosion resistance but low intensity, mostly used in manufacturing structure parts, due to high carbon and high strength can be obtained much used in the manufacture of spring, knives and other required high strength and abrasion resistance parts.And as in order to overcome the chromium nickel stainless steel intergranular corrosion, the carbon content of steel can be below 0.03%, or join a greater affinity than chromium and carbon element (titanium or niobium), make it not chromium carbide formation, such as high hardness and wear resistance becomes main requirements, we can increase the carbon content of steel properly increase the chromium content at the same time, both to meet the requirements of the hardness and wear resistance, and both - corrosion function, industry is used as the bearing, measuring tool and cutting stainless steel.Although the carbon content is as high as 0.85 ~ 0.95%, their chromium content is also increased correspondingly, so the requirement of corrosion resistance is guaranteed.Obtained in general, the current industrial applications of stainless steel and carbon content are relatively low, most of the stainless steel carbon content between 0.1 ~ 0.4%, acid-resistant steel is in the majority with 0.1 ~ 0.2% carbon.Stainless steel with a carbon content of more than 0.4% is only a small part of the total number of steel, because in most use conditions, stainless steel is mainly from the perspective of corrosion resistance.In addition, the lower carbon content is also due to certain process requirements, such as easy welding and cold deformation.Thick wall stainless steel pipe, large diameter thick wall stainless steel pipe.




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