The physical properties of the stainless steel and carbon steel data contrast

Nov 2


Allice S Lee

Allice S Lee

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Carbon steel slightly higher than the density of ferrite and martensite stainless steel body, and slightly lower than that of austenite size stainless...


Carbon steel slightly higher than the density of ferrite and martensite stainless steel body,The physical properties of the stainless steel and carbon steel data contrast Articles and slightly lower than that of austenite size stainless steel; Resistivity according to carbon steel, iron, grain size, shape and austenite martensite stainless steel increasing sorting; Linear expansion coefficient of the size of a similar sort, minimal austenite size highest stainless steel and carbon steel; Carbon steel pipe, iron, grain size and martensite stainless steel magnetic, austenite size non-magnetic stainless steel, but its cold hardening generated into austenite phase change will produce a magnetic, can be used heat treatment method to eliminate the martensite structure and restore its non-magnetic.


Compared with stainless steel and carbon steel, austenite size has the following features:

1) high electric Yin rate, which is about 5 times of carbon steel.

2) linear expansion coefficient, 40% larger than carbon steel, and with the increase of temperature, the linear expansion coefficient value also correspondingly improved.

3) low thermal conductivity, which is about 1/3 of the carbon steel.

Both stainless steel and heat resisting steel, austenite size the best comprehensive properties of steel plate, have enough strength, and has excellent plasticity and hardness is not high also, this is also one of the reasons they are widely used. Austenite stainless steel size with the vast majority of other similar metal materials, the tensile toughness to reduce slowly, there is no brittle transition temperature. So stainless steel at low temperature can keep enough plasticity and toughness.


The duplex stainless steel is in its solid quenching organization ferrite and austenite facies each half, general minimum phase content may be as high as 30%.

Due to the features of the two phase, with proper control of chemical composition and heat treatment process, make the DSS has both the advantages of ferritic stainless steel and austenitic stainless steel.


Compared with austenitic stainless steel, the advantage of duplex stainless steel is as follows:

1) the yield strength is more than twice as tall as ordinary austenitic stainless steel, and has enough plastic molding need toughness. Using the duplex stainless steel storage tank and pressure vessel wall thickness than the commonly used austenitic reduce 30-50%, reducing the cost.

2) has excellent resistance to stress corrosion cracking ability, even the lowest of duplex stainless steel alloy content than austenitic stainless steel has a higher resistance to stress corrosion cracking ability, especially in the environment of the chlorine ion. Stress corrosion is common austenitic stainless steel is difficult to solve the outstanding problems.

3) the most widely used in many medium of 2205 duplex stainless steel corrosion resistance is superior to the ordinary 316 l austenitic stainless steel, and super duplex stainless steel has high corrosion resistance, and then some medium, such as acetic acid, formic acid and so on can even replace austenitic stainless steel, high alloy and corrosion resistant alloy.

4) has a good resistance to local corrosion performance, compared to the alloy content quite austenitic stainless steel, its wear resistance corrosion and corrosion fatigue performance is better than that of austenitic stainless steel.

5), lower than the linear expansion coefficient of austenitic stainless steel and carbon steel, suitable for connecting with carbon steel, has important engineering significance, such as production of composite panels or lining, etc.

6) no matter under the condition of dynamic load and static load, than austenitic stainless steel has higher energy absorption capacity, the structure to cope with sudden accidents such as collision, explosion, etc., obvious advantages, duplex stainless steel has practical application value.

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