1.4404 Stainless Steel Sheet/Plate/Tube

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1.4404 chemical constituents
X2CrNiMo17-12-2/X2CrNiMO1810 stainless steel
Material number: 1.4404
Standard: DIN 17400
Characteristics and applications: X2CrNiMo17-12-2 stainless steel, German DIN standard stainless steel.
Chemical composition:
Carbon C: less than 0.03
Silicon Si: less than 1
Mn Mn: less than 2
Phosphorus P: less than 0.045
Sulfur S: less than 0.030
Chromium Cr:16.50~18.50
Molybdenum Mo:2.00-2.50
Nickel Ni:11.00-14.00
1.4404 stainless steel round steel plate classification:
1.4404 stainless steel Roundness - smooth surface and treated by quasi rolling.
1.4404 stainless steel black bar - Surface Black rough, directly hot rolled.
1.4404 hot rolled stainless steel round steel - conventional diameter 5.5- 250mm.
1.4404 forged stainless steel round steel - conventional diameter 50- 250mm.
1.4404 cold drawn stainless steel round steel - conventional diameter 3mm- 100mm.
1.4404 steel plate martensitic stainless steel -- 1.4404 bright side -- 10-20mm*1500*6000
1.4404 plate - austenitic stainless steel - 1.4404 mirror - including thick plate and thin plate
1.4404 fine plate -- ferritic stainless steel -- 1.44042B surface -- positive and negative tolerances at 0.01-0.02
1.4404 thin plate - bainitic stainless steel - 1.4404 fog surface - 0.1-1mm*1219*c
1.4404 coil plate -- duplex stainless steel -- 1.4404 original surface -- 1-10mm*1219*c
1.4404 thick plate -- super stainless steel -- 1.4404 grinding surface -- 20-30mm*1500*6000
1.4404 non standard special products can be produced / processed according to customer requirements.
Stainless steel is a high alloy steel with chromium, nickel, molybdenum and other alloy elements with more than 60% iron as the base.
When chromium content in steel is more than 12%, steel is not easy to corrode and rust in air and dilute nitric acid. The reason is that chromium and oxygen in the air form a very tight chromium oxide film on the surface of steel, which protects the steel from corrosion. Chromium content in stainless steel generally exceeds 14%, but stainless steel is not rust free. In coastal areas or some places with serious air pollution, there may be some rust spots on the surface of stainless steel exposed to the atmosphere when the chloride ion content in the air is high, but these rust spots are limited to the surface and will not corrode the internal matrix of stainless steel.
Stainless steel is classified according to its organization. There are mainly four kinds of stainless steel.
1. Austrian steel: corrosion resistance, good weldability and plasticity, but slightly low strength, often used in the manufacture of chemical containers and pipes, such as 304, 316 stainless steel, non-magnetic.
2. Ferritic steel: corrosion resistance, slightly higher strength, often used in the manufacture of chemical equipment, tableware and building decorative components, such as 430 stainless steel, magnetic.
3, martensitic steel: corrosion resistance, high hardness, commonly used in wear resistant parts, magnetic.
4. Bidirectional stainless steel (Austrian + ferrite): It is a new type of stainless steel developed in modern times. It has excellent corrosion resistance and high price. It is mainly used in chemical equipment and has magnetism.
Why is stainless steel resistant to oxidation and acid-alkali corrosion in air? This is because stainless steel contains not only iron, but also chromium and nickel with strong corrosion resistance. The content of chromium is generally over 13%, and the content of nickel is about 10%. For example, there is a kind of stainless steel which contains elements other than iron as follows:
Cr (CR) 17% ~ 19%; Ni (Ni) 8% ~ 11%;
C (c) is less than 0.14%; Si (SI) is less than 0.80%; Mn (MN) is less than 2%;
P (phosphorus) is less than 0.035%; S (sulfur) is less than 0.03%
Stainless Steel Surface and Character
The surface brightness and flatness of 2B is better than 2D then theough a special surface treatment to improve its mechanical properties,2B could nearly Satisfy comprehensive uses
Cold rolled, bright annealed and skin-passed, the product have excellent brightness and food reflexivity like mirrorm kitchen 
apparatus, omament etc.
The product have excellent brightness and prefer reflexivity can be the mirror.
Polished with abrasive belt of trit#150#320 on the NO.4 finish and has 
continuous streaks, mainly used as buildings omaments elevators, 
door of building, frontal plate etc.
Polished with abrasive belt of git#100#200#,have better brightness with 
discontinuous coarse stria used as inner and external omaments for building,
electrical appliances and kitchen utensils etc.
Polished with abrasive belt of grit#150#180,have better brightness with 
discontinuous coarse stria, but thinner than NO.3, are used as bathtub 
buildings inner and extemal omaments electrical appliances kitchen
utensils and food processing