Is the Omega constellation strap 904L?

1: brand: 904L austenitic stainless steel.

Two: chemical composition:

C: ≤ 0.02？ Manganese Mn: ≤ 2.00? Silicon Si: ≤ 1.00? Chromium Cr: 19.0 ~ 23.0? Nickel: 23.0 ~ 28.0

Phosphorus P: ≤ 0.045? Sulfur s: ≤ 0.035? Mo: 4.0 ~ 5.0? Copper Cu: 1.0 ~ 2.0

Three. Scope of application Application field:

Petrochemical equipment, such as reactors in petrochemical equipment, sulfuric acid storage and transportation equipment, such as heat exchangers, flue gas desulfurization devices in power plants, are mainly used in towers, flues, baffles, absorber internals and spray systems in organic acid treatment systems, scrubbers and fans, seawater treatment devices, seawater heat exchangers, paper industry equipment, sulfuric acid and nitric acid equipment, acid production, pharmaceutical industry and other chemical equipment. Pharmaceutical factory: centrifuges, reactors, etc. Plant food: soy sauce cans, cooking wine, salt cans, equipment and dressings, which are suitable for 904L, a medium with strong corrosiveness to dilute sulfuric acid.

Four: physical properties:

Density: 8.24 g/cm3. Tensile strength: σb≥520Mpa. Elongation: δ≥35%.

V. Overview

The hot forming of this steel can be carried out at 1000- 1 150 degrees Celsius. The heat treatment process of this steel is1100-1150℃, and it is cooled rapidly after heating. Although this kind of steel can be welded by general welding technology, the suitable welding methods for zui are manual arc welding and argon tungsten arc welding. When manual arc welding is used to weld plates not greater than 6 mm, the diameter of covered electrode is not greater than 2.5mm；; When the plate thickness is greater than 6 mm, the covered electrode diameter is less than 3.2 mm. When heat treatment is needed after welding, 1075- 1 125℃ can be used for heat treatment, and then rapid cooling can be performed. When welding with TIG, the filler metal can be made of the same material, covered electrode. After welding, the weld must be pickled and passivated.