| Quotation | According To Your Drawings or Samples. (Size, Material, Thickness, Processing Content And Required Technology, etc.) |
| Tolerance | +/-0.005 - 0.01mm (Customizable) |
| Surface Roughness | Ra0.2 - Ra3.2 (Customizable) |
| Materials Available | Aluminum, Copper, Brass, Stainless Steel, Titanium, Iron, Plastic, Acrylic, PE, PVC, ABS, POM, PTFE etc. |
| Surface Treatment | Polishing, Surface Chamfering, Hardening and Tempering, Nickel plating, Chrome plating, zinc plating, Laser engraving, Sandblasting, Passivating, Clear Anodized, Color Anodized, Sandblast Anodized, Chemical Film, Brushing, etc. |
| Processing | Hot/Cold forging, Heat treatment, CNC Turning, Milling, Drilling and Tapping, Surface Treatment, Laser Cutting, Stamping, Die Casting, Injection Molding, etc. |
| Testing Equipment | Coordinate Measuring Machine (CMM) / Vernier Caliper/ / Automatic Height Gauge /Hardness Tester /Surface Roughness Teste/Run-out Instrument/Optical Projector, Micrometer/ Salt spray testing machine |
| Drawing Formats | PRO/E, Auto CAD, Solid Works , UG, CAD / CAM / CAE, PDF |
| Our Advantages | 1.) 24 hours online service & quickly quote and delivery. 2.) 100% quality inspection (with Quality Inspection Report) before delivery. All our products are manufactured under ISO 9001:2015. 3.) A strong, professional and reliable technical team with 16+ years of manufacturing experience. 4.) We have stable supply chain partners, including raw material suppliers, bearing suppliers, forging plants, surface treatment plants, etc. 5.) We can provide customized assembly services for those customers who have assembly needs. |
What is SS321 Steel Flange?
SS321 steel flange is a type of stainless steel flange that contains a high amount of chromium and nickel, along with titanium as a stabilizing element. This alloy is a modified version of SS304 steel, with the addition of titanium providing better resistance to intergranular corrosion and high-temperature strength.
Chemical Composition of SS321 Steel
The chemical composition of SS321 steel includes:
Chromium (Cr): 17-19%
Nickel (Ni): 9-12%
Manganese (Mn): 2%
Silicon (Si): 1%
Carbon (C): 0.08%
Phosphorus (P): 0.045%
Sulfur (S): 0.03%
Titanium (Ti): 5x(C+N) min to 0.70% max
Properties of SS321 Steel Flange
SS321 steel flanges offer several beneficial properties, including:
Excellent corrosion resistance in high-temperature environments
High-temperature strength and stability
Resistance to intergranular corrosion
Good weldability and formability
Resistance to scaling and crevice corrosion
Low thermal expansion coefficient
Good oxidation resistance
Types of SS321 Steel Flange
There are various types of SS321 steel flanges, including:
Weld Neck Flange: used in high-pressure, high-temperature applications
Slip-On Flange: used in low-pressure applications
Blind Flange: used to seal off the end of a pipe
Socket Weld Flange: used for small-diameter pipes
Threaded Flange: used for low-pressure, non-critical applications
Manufacturing Process of SS321 Steel Flange
The manufacturing process of SS321 steel flanges includes:
Melting of raw materials (steel, nickel, chromium, titanium, etc.) in a furnace
Casting the molten metal into a mold of the desired shape
Heat treatment to improve strength and corrosion resistance
Machining to achieve the final dimensions and surface finish
Applications of SS321 Steel Flange
SS321 steel flanges are used in various industries, including:
Chemical and petrochemical
Power generation
Oil and gas
Food and beverage
Pharmaceutical
Water treatment
They are commonly used in high-temperature and high-pressure environments where corrosion resistance is critical.
Advantages of SS321 Steel Flange
Some advantages of SS321 steel flanges include:
Excellent corrosion resistance in high-temperature environments
High-temperature strength and stability
Resistance to intergranular corrosion
Good weldability and formability
Resistance to scaling and crevice corrosion
Low thermal expansion coefficient
Good oxidation resistance
Comparison with Other Stainless Steel Flanges
Compared to other stainless steel flanges, SS321 offers better resistance to intergranular corrosion and higher-temperature strength. It is also more expensive than some other stainless steel alloys, such as SS304 and SS316.
Maintenance and Care of SS321 Steel Flange
To maintain the performance and longevity of SS321 steel flanges, it is important to:
Keep them clean and free from contaminants
Inspect them regularly for signs of corrosion or damage
Use compatible materials and tools for installation and maintenance
Use proper welding techniques to avoid damaging the flange or causing stress corrosion cracking
Common Issues with SS321 Steel Flange
Some common issues that can arise with SS321 steel flanges include:
Stress corrosion cracking: caused by the combination of tensile stress and a corrosive environment
Intergranular corrosion: caused by sensitization of the metal due to improper welding or heat treatment
Crevice corrosion: caused by the presence of stagnant water or other fluids in crevices or gaps in the flange
Scaling: caused by exposure to high temperatures, leading to the formation of oxide layers on the surface of the metal
How to Select the Right SS321 Steel Flange
When selecting an SS321 steel flange, it is important to consider factors such as:
The temperature and pressure of the system
The size and type of pipes being connected
The required corrosion resistance and strength
The installation and maintenance requirements
The cost and availability of the flange
Cost of SS321 Steel Flange
The cost of SS321 steel flanges can vary depending on factors such as the size, type, and quantity needed, as well as market demand and availability. Generally, SS321 steel flanges are more expensive than other stainless steel alloys due to their higher corrosion resistance and strength.
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