316L stainless steel plate is a kind of alloy metal steel. 316L stainless steel plate according to the test :316L stainless steel due to the addition of Mo, corrosion resistance, especially excellent pitting resistance; High temperature strength is also very good; Excellent work hardening (weak magnetic properties after machining); Non-magnetic in solid solution. 316L stainless steel grade :00Cr17Ni14Mo2 The new national standard grade is :022Cr17Ni12Mo2
intro
1, summary: Add Mo(2~3%), excellent pitting resistance, high temperature creep strength.
2. Features
1) Cold rolled product appearance good gloss, beautiful;
2) Due to the addition of Mo, corrosion resistance, especially excellent pitting resistance;
3) Excellent high temperature strength; From "I want stainless steel."
4) Excellent work hardening (weak magnetism after processing)
5) Solid solution state non-magnetic;
6) Relative to 304 stainless steel, the price is higher.
3, the scope of application: pipeline, heat exchanger, food industry, chemical industry, etc.
4, chemical composition %
C 0.03 or less
Si 1.00 or less
Mn 2.00 or less
P 0.035 or less
S 0.03 or less
Ni: 10.0 to 14.0
Cr: 16.0 to 18.0
Mo: 2.0 to 3.0
5. Heat treatment
Melting point :1375~1450℃;
Solution treatment :1010~1150℃.
7. Use status
1) Annealing solution state:
NO.1, 2b, N0.4,HL and other surface states
Steel plate introduction
Product name :316L stainless steel plate According to the test :316L stainless steel due to the addition of Mo, corrosion resistance, especially excellent pitting resistance; High temperature strength is also very good; Excellent work hardening (weak magnetic properties after machining); Non-magnetic in solid solution. 316L stainless steel grade :00Cr17Ni14Mo2 The new national standard grade is :022Cr17Ni12Mo2
316L stainless steel chemical composition
C≤ 0.03Si ≤ 1.00Mn ≤ 2.00P ≤ 0.035S ≤ 0.03Ni: 10.0-14.0Cr: 16.0-18.0Mo :2.0-3.0
Mechanical property
Tensile strength (Mpa) 620 MIN
Yield strength (Mpa) 310 MIN
Elongation (%) 30 MIN
The area was reduced by (%) 40 MIN
Density of 316L stainless steel
8.03g /cm3, austenitic stainless steel is generally used this value
316L Chromium content (%) 16--18.
1. Characteristics: Due to the addition of Mo, its corrosion resistance, atmospheric corrosion resistance and high temperature strength is particularly good, can be used under harsh conditions; Excellent work hardening (non-magnetic); Excellent high temperature strength; Non-magnetic in solid solution; Cold rolling product appearance good gloss, beautiful; Relative to 304L stainless steel, the price is higher.
2. Use: seawater equipment, chemical, dye, paper, oxalic acid, fertilizer and other production equipment; Photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts
410
1. Characteristics: As a representative of martensitic steel, although the strength is high, it is not suitable for use in a harsh corrosive environment; Its workability is good, according to the heat treatment surface hardening (magnetic).
2. Uses: cutting edge, mechanical parts, petroleum refining device, bolt, nut, pump rod, 1 type tableware (cutlery and fork).
Corrosion cause
Stainless steel surface deposit containing other metal elements of dust or alien metal particles of the attachment, in the humid air, the attachment and stainless steel condensate between the two into a microbattery, causing an electrochemical reaction, the protective film is damaged, called electrochemical corrosion. 2. The surface of stainless steel adheres to organic juice (such as melons and vegetables, noodle soup, sputum, etc.), which constitutes organic acid in the case of water oxygen, and the organic acid corrods the metal surface for a long time. 3. Stainless steel surface adhesion containing acid, alkali, salt substances (such as alkaline water, lime water splash on the decoration wall), causing local corrosion. 4. In polluted air (such as the atmosphere containing a large number of sulfides, carbon oxide, nitrogen oxide), in case of condensation, sulfuric acid, nitric acid, acetic acid liquid point is formed, causing chemical corrosion. The above conditions can cause the damage of the stainless steel surface protective film and lead to corrosion
Cause of rust
When the surface of stainless steel appears brown spots, people are surprised :" stainless steel will not rust, rust is not stainless steel, may be a problem with steel." In fact, this is a lack of understanding of stainless steel, a one-sided wrong view. Stainless steel also rusts under certain conditions.
Stainless steel has the ability to resist atmospheric oxidation, that is, no rust, but also has the ability to resist corrosion in the medium containing acid, alkali and salt, that is, corrosion resistance. However, the size of its corrosion resistance is changed with the chemical composition of the steel itself, the use conditions of the mutual state and the type of environmental media. Such as 304, in a dry and clean atmosphere, there is absolutely excellent corrosion resistance, but if it is moved to the seaside area, in the sea fog containing a lot of salt, it will soon rust, and 316 stainless steel is good. Therefore, not any kind of stainless steel, at any time can resist corrosion, does not rust.
Stainless steel is formed by its surface a layer of extremely thin and solid fine stable chromium-rich oxide film (protective film). Prevent oxygen atoms from continuing to penetrate and continue to oxidize, and obtain corrosion resistance. Once for some reason, this film is constantly destroyed, the oxygen atoms in the air or liquid will continue to be resolved out, forming loose iron oxide, and the metal surface will be constantly corroded.
distinction 316L and 304L
Now the two most commonly used stainless steel 304,316L (or corresponding to the German/European standard 1.4308,1.4408), 316L and 304 in the chemical composition of the most important difference is that 316L contains Mo, and it is generally recognized that 316L corrosion resistance is better than 304 in high temperature environment more corrosion resistance. Therefore, in high temperature environments, engineers generally choose 316L material parts. But the so-called thing is not absolute, in the concentrated sulfuric acid environment, then the high temperature must not use 316L! Or this is gonna be a big deal. Mechanical people have learned thread, remember in order to prevent thread bite at high temperatures, need to apply a black solid lubricant: molybdenum disulfide (MoS2), from which it draws 2 conclusions is not :[1]Mo is indeed a high-temperature material (know what crucible gold melts with? Molybdenum crucible!) . [2] Molybdenum readily reacts with high sulfur ions to form sulfide. So no stainless steel is super resistant to corrosion. In the end, 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.
sort
316L stainless steel is divided into bright stainless steel plate, polished stainless steel plate, precision stainless steel plate, 2b stainless steel plate, 8k stainless steel plate, 6k stainless steel plate, ba stainless steel plate, mirror stainless steel plate, ultra-thin stainless steel plate, medium thick stainless steel plate, thick stainless steel plate, super thick stainless steel plate.
