What are the characteristics of 904L stainless steel plate

The characteristics of 904L stainless steel plate are strong corrosion resistance and mechanical properties.

and high density. 1. Strong corrosion resistance: 904L stainless steel plate is also called super austenitic stainless steel.

It is a stainless steel plate with a very low carbon content, even in dilute sulfuric acid.

It also has good corrosion resistance, and because 904L stainless steel plate contains high chromium-nickel-molybdenum content and the addition of copper, it can effectively reduce chloride-rich content.

sensitization to stress corrosion.

2. Mechanical properties: As mentioned above, 904L stainless steel plate is a highly alloyed austenitic stainless steel with very low carbon content, so the minimum value of the mechanical properties of 904L stainless steel plate alloy at room temperature can be reached as follows

3. High density: the high density of 904L stainless steel plate is relative to other austenitic stainless steels, the density of 904L stainless steel plate is, and the density of other stainless steels is as follows

Precautions for 904L stainless steel plate.

Welding: 904L stainless steel plate should be welded with small line energy, continuous and fast welding rate. 904L stainless steel plate, like other general stainless steels, the most commonly used welding method is manual arc welding or Sui gas shielded welding.

Processing: 904L stainless steel plate as a super austenitic stainless steel, in the process of machining is prone to sticky knife and work hardening, so it is recommended to use positive angle cemented carbide tools, vulcanized and chlorinated oil as cutting coolant.

Summary: 904L stainless steel plate has the characteristics of strong corrosion resistance, mechanical properties and high density, but the precautions of 904L stainless steel plate can not be ignored in the process of use, and the local temperature of 904L stainless steel plate should not exceed 10 0 when welding, so as not to lead to carbon agglomeration and intergranular corrosion.

904L (N08904, 14539) is a highly alloyed austenite so that it is quite resistant to severe corrosion. So it resists erosion:

It is not prone to erosion spots and cracks.

Resistant to particle erosion.

Good resistance to pressure. Common erosion.

904L stainless steel is an austenitic stainless steel with unstable low carbon content. This high-alloy stainless steel contains copper to improve its resistance to strongly reducing acids such as sulfuric acid. The steel grade is also resistant to stress corrosion cracking and crevice corrosion.

904L is a non-magnetic steel that provides good formability, toughness and weldability. 904L contains a large amount of *** components such as molybdenum and nickel. Today, most use 904L to replace the low-cost duplex stainless steel 2205.

904L is resistant to seawater and chlorine. The high-performance 904L is resistant to stress corrosion cracking due to the presence of nickel in its composition. In addition to this, the addition of copper also acts as a resistive blocker to block the corrosion of sulfuric acid and other reducing agents in a positive and gentle way.

Corrosion-resistant Super Austenitic 904L is among the Super austenitic grades with 6% molybdenum content and 316L austenitic grades. 904L is less nitric than 304L and 310L because of its lack of molybdenum. This grade is able to achieve maximum stress and corrosion resistance to cracking in a critical environment after cold working.

904L stainless steel plate is divided into: hot-rolled stainless steel plate, cold-rolled stainless steel plate, and finished rolled stainless steel plate. Super austenitic stainless steel (904L stainless steel plate) is a highly alloyed austenitic stainless steel with very low carbon content, with good corrosion resistance in dilute sulfuric acid, and is designed for harsh environments with corrosive conditions.

It has a high chromium content and sufficient nickel content, and the addition of copper makes it have a strong acid resistance, especially to chloride gap corrosion and stress corrosion chipping, it is not easy to appear corrosion spots and cracks, and its pitting resistance is slightly better than that of other steel grades, and it has good machinability and weldability, and can be used in pressure vessels.

Application performance of 904L stainless steel plate:

Welding performance. As with stainless steel in general, 904L can be welded in a variety of welding methods. The most commonly used welding methods are manual arc welding or inert gas shielded welding, where the electrode or wire metal is based on the composition of the base metal and has a higher purity, and the molybdenum content is required to be higher than that of the base metal.

There is generally no need to preheat before welding, but in the cold outdoor operation, in order to avoid the condensation of water vapor, the joint part or adjacent area can be evenly heated. Be careful not to exceed 100 degrees Celsius in the local temperature, so as not to cause carbon accumulation and intergranular corrosion. It is advisable to use small line energy, continuous and fast welding rate when welding.

After welding, there is generally no need for heat treatment, if heat treatment is required, it must be heated to 1100 1150 and then cooled quickly.

Machinability.

The machining characteristics of 904L are similar to those of other austenitic stainless steels, with a tendency to stick to the knife and work harden during the machining process. Positive carbide tools must be used, vulcanized and chlorinated oil should be used as cutting coolant, and the equipment and process should be based on the premise of reducing work hardening. During the cutting process, slow cutting speed and feed amount should be avoided.

1. Grade: 904L austenitic stainless steel.

Two: Chemical composition:

Carbon C: Manganese Mn: Silicon Si: Chromium Cr: Nickel Ni:

Phosphorus P: Sulfur S: Molybdenum Mo: Copper Cu:

Three: the scope of application, the field of application:

Petroleum and petrochemical equipment, such as reactors in petrochemical equipment, sulfuric acid storage and transportation equipment, such as heat exchangers, etc., flue gas desulfurization devices in power plants, the main parts of use are: tower body, flue, door panel, internal parts, spray system, etc., scrubbers and fans in organic acid treatment systems, seawater treatment devices, seawater heat exchangers, paper industry equipment, sulfuric acid, nitric acid equipment, acid production, pharmaceutical industry and other chemical equipment, pressure vessels, food equipment, pharmaceutical factories: centrifuges, reactors, etc., Plant Food:

Soy sauce tanks, cooking wine, salt tanks, equipment and dressings, against dilute sulfuric acid strong corrosive medium 904L is a matching steel grade.

Four: Physical properties:

Density:. Tensile strength: b 520mpa. Elongation: δ 35%.

Five: Overview. This steel thermoforming can be carried out at 1000-1150 degrees Celsius. The heat treatment process of the steel is 1100-1150 degrees Celsius, and it is quickly cooled after heating. Although this steel can be welded using a common welding process, the appropriate welding methods are manual arc welding and tungsten argon arc welding.

When manual arc welding is used to weld plates not more than 6 mm, the diameter of the electrode is not more than mm; When the plate thickness is greater than 6 mm, the diameter of the electrode is less than mm. When heat treatment is required after welding, it can be heated at 1075-1125 degrees Celsius and then cooled quickly. The filler metal used for tungsten argon arc welding can be used with the same material electrode, and the weld must be pickled and passivated after welding.

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The following is the material density and some performance data of 904L stainless steel 904L density:, melting point: 1300-1390, magnetic: no heat treatment: 1100-1150 between heat preservation for 1-2 hours, fast air cooling or water cooling.

Mechanical Properties: Tensile Strength: B 490MPa, Yield Strength B 215MPa: Elongation: δ 35%, Hardness: 70-90 (HRB).

As of January 7, 2020, 904L stainless steel pipe** is about 80 yuan a kilogram.

904L stainless steel plate has a wide range of uses, with good corrosion resistance, heat resistance, low temperature strength and mechanical properties; It has good heat workability such as stamping and bending, and there is no heat treatment hardening. It is widely used in household products, cabinets, indoor pipelines, water heaters, boilers, bathtubs, auto parts, medical appliances, building materials, chemicals, food industry, agriculture, and ship parts.