Shandong Kuaima  Steel Co., Ltd.



special size 304L stainless steel sheet annealing



special size 304L stainless steel sheet annealing

  1. 304L stainless steel sheet contains much less carbon than 304. 304L is more resistant to pitting than 304 in welded joints or other treatments.
  2. 304L is more resistant to corrosion, 304L contains less carbon.
  3. 304 is widely used, has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; stamping and bending and other hot workability, no heat treatment hardening phenomenon (non-magnetic, use temperature -196 ° C ~ 800 ° C).
  4. 304L after welding or stress relief, its excellent resistance to grain boundary corrosion; in the absence of heat treatment, can also maintain good corrosion resistance, the use of temperature -196 ° C-800 ° C.
  5. Stainless steel sheet is divided into two kinds of hot-rolled and cold-rolled by the method, including thin cold plate of thickness 0.02-4mm and medium thick plate of 4.5-100mm.
  6. Stainless steel corrosion resistance mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and internal organization, the main role is played by the element chromium. Chromium has high chemical stability and can form a passivation film on the steel surface, which isolates the metal from the outside world, protects the steel plate from oxidation and increases the corrosion resistance of the plate. After the passivation film is destroyed, the corrosion resistance decreases.

National standard properties:

  • Tensile strength(Mpa) 520
  • Yield strength(Mpa) 205-210
  • Elongation(%) 40%
  • Hardness HB187 HRB90 HV200

304 stainless steel density 7.93 g/cm3 austenitic stainless steel are generally used this value 304 chromium content (%) 17.00-19.00, nickel content (%) 8.00-10.00, 304 is equivalent to China's 0Cr19Ni9 (0Cr18Ni9) stainless steel

304 stainless steel is a general-purpose stainless steel material, rust resistance than the 200 series of stainless steel material is stronger. It is also better in terms of high temperature resistance.

304 stainless steel has excellent stainless corrosion resistance and better resistance to intergranular corrosion.

For oxidizing acid, it is concluded in the experiment: concentration ≤ 65% of the boiling temperature below the nitric acid, 304 stainless steel has a strong resistance to corrosion. To alkali solutions and most organic and inorganic acids also have good corrosion resistance.

General characteristics:

  1. 304 stainless steel sheet has beautiful surface and diversified use possibilities
  2. Good corrosion resistance, longer lasting than ordinary steel with good corrosion resistance
  3. High strength, so the possibility of using thin plates is high
  4. High temperature oxidation resistance and high strength, so it can resist fire
  5. Normal temperature processing,that is easy plastic processing
  6. Easy and simple maintenance because surface treatment is not necessary
  7. High cleanliness and finish
  8. Good welding performance

Wire drawing performance:

First, dry grinding brushed

The most common on the market are long wire and short wire, 304 stainless steel plate after processing such surface, showing good decorative effect, can meet the requirements of general decorative materials. Generally speaking, 304 series stainless steel can be in a grinding will form a good effect. Due to the low cost of such processing equipment, simple operation, low processing costs, wide range of applications, to become a processing center must choose equipment. So most processing centers can provide long and short filament abrasive plate, of which 304 steel accounts for more than 80%.

Second, oil grinding wire drawing

304 family stainless steel after oil grinding reflects the perfect decorative effect, widely used in elevators, home appliances and other decorative panels. Cold-rolled 304 stainless steel can generally achieve good results after a grinding process, there are some processing centers in the market can provide hot-rolled stainless steel oil grinding process, the effect and cold-rolled oil grinding is not comparable. Oil brushing also has a long wire and short wire. Elevator decoration generally choose long wire, and all kinds of small appliances, kitchenware and other two kinds of grain are available.

Difference between 316 and 304:

The two most commonly used stainless steel 304, 316 (or corresponding to the German / European standard 1.4308,1.4408), 316 and 304 in the chemical composition of the most important difference is that 316 contains Mo, and generally recognized, 316 corrosion resistance is better than 304 in high-temperature environment more corrosion-resistant. So in high-temperature environment, engineers will generally choose 316 material parts. But the so-called thing is not absolute, in the concentrated sulfuric acid environment, and then the high temperature do not use 316! Learn mechanical people have learned thread, remember in order to prevent thread galling at high temperatures, need to apply a black solid lubricant: molybdenum disulfide (MoS2), from which 2 conclusions are not: [1] Mo is indeed a high temperature-resistant substances (know what crucible gold melting? Molybdenum crucible!) . [2]: Molybdenum can easily react with high-valent sulfur ions to generate sulfides. So there is no stainless steel is super invincible corrosion resistance. In the end, stainless steel is a piece of impurities (but these impurities can be more resistant to corrosion than steel ^ ^) more steel, is steel can react with other substances.

Grade Density:

Steel Grade












Corrosion resistance:

The corrosion resistance of stainless steel plate mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, manganese, etc.) and internal organizational structure, the main role is played by the element chromium.

Chromium has a high chemical stability, can form a passivation film on the surface of the steel, so that the metal and the outside world isolated, to protect the steel plate from oxidation, increase the corrosion resistance of the steel plate. After the passivation film is destroyed, the corrosion resistance decreases.

It is required to withstand the corrosion of various acids, such as: oxalic acid, sulfuric acid-iron sulfate, nitric acid, nitric acid-hydrofluoric acid, sulfuric acid-copper sulfate, phosphoric acid, formic acid and acetic acid.

Widely used in: chemical, food, medicine, paper, petroleum, atomic energy, construction, kitchenware, tableware, vehicles, household appliances, etc.


304 is widely used in household products (1 and 2 types of tableware), cabinets, indoor piping, water heaters, boilers, bathtubs, auto parts, medical appliances, building materials, chemicals, food industry, agriculture, and ship parts.

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