Jiangsu Zhonggongte Metallurgical Technology Co., Ltd.
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Heat-resistant steel 321H/S32169/1.4940 Stainless steel plate/tube/roll
321H stainless steel is a high carbon austenitic stainless steel with excellent corrosion resistance, high temperature strength and good structural stability. Its chemical composition includes carbon (C) 0.04~0.10%, manganese (Mn) ≤2.00%, silicon (Si) ≤0.75%, chromium (Cr) 17.0~19.0%, nickel (Ni) 9~12.0%, phosphorus (P) ≤0.045%, sulfur (S) ≤0.03%, titanium (Ti) 4*(C+N)~0.70%.
| C | Mn | Si | Cr | Ni | P | S |
| 0.04~0.10% | ≤2.00% | ≤0.75% | 17.0~19.0% | 9~12.0% | ≤0.045% | ≤0.03% |
Features
The main characteristics of 321H stainless steel include:
Corrosion resistance: It exhibits good corrosion resistance in oxidizing media, especially suitable for environments with anti-granular corrosion.
High temperature strength: Due to its high carbon content, 321H stainless steel exhibits excellent creep resistance and rupture strength at high temperatures, and is suitable for high temperature working environments.
Organization stability: Titanium is added as a stabilizing element to effectively prevent carbide precipitation and intergranular corrosion, and no annealing is required after welding.
Application areas 321H stainless steel is widely used in many fields, including:
Chemical and petrochemical equipment: used to manufacture storage tanks, pipelines, heat exchangers and chemical reactors, etc.
Petroleum and natural gas industry: commonly used in high-temperature processing equipment in refineries, such as boiler parts, super heater pipelines, etc.
Power plants: used for boiler parts, super heater pipelines, etc.
Aerospace, automotive industry: and food processing and pharmaceutical equipment that requires high-temperature sterilization.
Manufacturing process 321H stainless steel manufacturing processes include hot working and cold working:
Hot working: including forging, hot rolling, hot extrusion, etc., the heating temperature is usually between 1150°C and 1250°C, the holding time is usually 30 minutes to 2 hours, and the cooling method can be air cooling or furnace cooling.
Cold processing: including cold rolling, cold drawing, cold forging, etc. During the process, it is necessary to control the deformation, use lubricants and take appropriate cooling measures.
1. Construction industry
As a high-strength metal material, stainless steel coils have the characteristics of high temperature resistance, acid and alkali resistance, anti-corrosion, and earthquake resistance, so they are widely used in the construction industry. Such as exterior wall panels, roofs, doors, windows, railings, decorative panels, etc., not only have a beautiful appearance, but also have good durability and corrosion resistance, giving the building a longer service life.
2. Home appliances
Stainless steel coil materials can be used to produce home appliances, such as refrigerators, washing machines, etc. Stainless steel materials have good corrosion resistance and easy cleaning, so they can effectively protect electrical products from corrosion and maintain a long service life. At the same time, its material is smooth and beautiful, and it can also improve the appearance of home appliances.
3. Automobile and aviation manufacturing
The automotive and aviation industries have put forward higher requirements for metal materials, which require excellent corrosion resistance, wear resistance, high strength and other properties. In addition to its application in automobile exterior and interior decoration, stainless steel materials are also widely used in braking systems, exhaust systems, engine exhaust gas treatment systems and other fields, which can effectively extend the service life of motorcycles, cars, airplanes and other transportation vehicles.
4. Light industrial manufacturing
Stainless steel coils are also used in light industrial manufacturing, such as manufacturing toys, watches, daily necessities, etc. Due to the smooth surface and easy cleaning of stainless steel, these products are more fashionable, clean and high-end, and are welcomed by consumers.
Stainless steel hot rolled coil: thickness 0.1-14mm, width 1000 or 1219 or 1500 or 1800 or 2000mm (including burrs)
Stainless steel cold rolled coil: thickness 0.3-3.0, width 1000 or 1219 or 1500 (including burrs)
surface group
NO.1, 2B, 2D, 3#, 4#, HL, BA
surface description
N0.1 After hot rolling, it undergoes heat treatment and pickling.
2B After cold rolling, heat treatment, pickling or similar treatment, and finally smoothing to obtain appropriate gloss.
2D cold rolling followed by heat treatment, pickling or similar treatment or matte surface.
3# Products ground with 100~200# grinding belt.
4# products ground with 150~180# grinding belt.
HL is polished with abrasive materials of appropriate particle size to give the surface a continuous grinding pattern.
