High Quality 316L stainless steel Plate

316L is a stainless steel brand, AISI 316L is the corresponding American brand, SUS 316L is the corresponding Japanese brand. The unified digital code of China is S31603, the standard brand number is 022Cr17Ni12Mo2 (new brand), and the old brand number is 00Cr17Ni14Mo2, which means it mainly contains Cr, Ni and Mo, and the number means the approximate percentage. The national standard is GB/T 20878-2007 (current edition).

High Quality 316L stainless steel Plate


Chemical composition

Carbon C: 0.030 or less

Si Si: 1.00 or less

Manganese Mn: 2.00 or less

S: sulfur 0.030 or less

P P: 0.045 or less

Cr: 16.00 ~ 18.00

Ni: 10.00 ~ 14.00

Molybdenum Mo: 2.00 ~ 3.00


Corrosion Resistance

316L is widely used in the chemical industry because of its excellent corrosion resistance. It is also a derivative of 18-8 austenitic stainless steel, with 2 ~ 3% Mo elements added. On the basis of 316L, many kinds of steel are derived. For example, 316Ti is derived by adding a small amount of Ti, 316N is derived by adding a small amount of N, and 317L is derived by increasing Ni and Mo contents.


Most of the 316L on the market is produced according to American standard. For the sake of cost, steel mills generally put the Ni content of products as low as possible. According to the us standard, the Ni content of 316L is 10-14%, while the Japanese standard stipulates that the Ni content of 316L is 12-15%. According to the minimum standard, there is a 2% difference between American standard and Japanese standard in Ni content, which is quite huge in price. Therefore, customers still need to see clearly when buying 316L products, and the products should refer to ASTM or JIS standard.


With the Mo content of 316L, the steel has excellent pitting resistance and can be safely applied in environments containing Cl- and other halogen ions. Since 316L is mainly used for its chemical properties, steel mills have a lower requirement for surface inspection of 316L (compared with 304), and customers with higher requirements should strengthen the surface inspection.


Mechanical Properties 

Sigma b (MPa) : ≥480

Conditional yield strength sigma 0.2 (MPa) : ≥177

Elongation 5 (%) : ≥40

Reduction of area bits (%) : 60 or higher

Hardness: 187 hb or less; 90 HRB or less; 200 hv or less

Density: 7.98g/cm3;

Specific heat capacity ratio (20℃) : 0.502j /(g*K)

The difference discrimination


Currently, the two most commonly used stainless steels are 304,316 (or corresponding to 1.4308,1.4408 of the German/European standard). The main difference between 316 and 304 in chemical composition is that 316 contains Mo, and it is generally recognized that 316 has better corrosion resistance and is more resistant to corrosion than 304 in high temperature environment. Therefore, under high temperature environment, engineers usually choose 316 parts. But the so-called thing is not absolute, in the concentrated sulfuric acid environment, and then do not use 316 high temperature. Mechanical people have learned thread, remember that in order to prevent the thread bite at high temperatures, need to apply a black solid lubricant: molybdenum dissulfide (MoS2), from which two conclusions can be drawn: one: Mo is really a high-temperature material (know what crucible gold melting? Molybdenum crucible!) . Molybdenum reacts easily with high-priced sulfur ions to form sulfide. So no stainless steel is super resistant to corrosion. In the final analysis, stainless steel is a piece of impurities (but these impurities can be more corrosion resistant than steel) more steel, steel can react with other substances.

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