321 Stainless Steel

321 Stainless Steel

321 stainless steel is an austenitic stainless steel with excellent corrosion resistance, high temperature resistance, weldability and processability. At high temperatures, its oxidation resistance and corrosion resistance are better than ordinary austenitic stainless steel. Proper annealing treatment can eliminate the stress of the material, improve its plasticity and toughness, thereby improving its processing performance and mechanical properties.

UNS S32100
EN 1.4541

Our warehouse has a large number of stock to provide you with a variety of products in different sizes, and can also customize the size according to your needs

Bar: 0.5~600mm Diameter
Coil: 0.5~150mm Thick
Plate: 0.5~200mm Thick
Pipe: 6~630mm External Diameter; 0.5~40mm Wall Tick
Available in specific sizes

321 Stainless Steel Bar/Rod
321 Stainless Steel Pipe/Tube
321 Stainless Steel Seamless Pipe
321 Stainless Steel Welded Pipe
321 Stainless Steel Coil/Strip
321 Stainless Steel Plate/Sheet
321 Stainless Steel Hot Rolled Plate
321 Stainless Steel Cold Rolled Plate
321 Stainless Steel Wire
321 Stainless Steel Fitting (Flange, Elbow, Tee…)
321 Stainless Steel Profile (Angle, Channel, H/I Beam…)
321 Stainless Steel Customize

Available, welcome to consult

A) Packaging Details: Standard export seaworthy packing or as required.
B) Delivery Time: 30-50 days, 7 days for stock goods.
C) Loading Port: Shanghai, Tianjin, Qingdao.
D) Offer Ability: 5000MT/Per Month.
E) MOQ: 1 Pcs.

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321 Stainless Steel Supplier Provides Rich Forms

Gnee is a leading ISO certified 321 stainless steel supplier, manufacturer, exporter, manufacturer, wholesaler, distributor in China. We offer superior quality 321 stainless steel and manufactured as per industry standards. Our stainless steel is available in a variety of grades and sizes and can be customized to your exact requirements. Gnee is your reliable partner to meet your steel and stainless steel needs, welcome to contact us!

Product Name321 Stainless Steel
Rich FormsPlate, pipe, bar, coil, profiles, strip, fittings, flange
Typical ASTM StandardsASTM A240/A240M
ASTM A312/A312M
ASTM A213/A213M
ASTM A249/A249M
Surface Treatment2B, 2D, BA, No.1, No.3, No.4, No.6, No.7, No.8, HL (Hairline), SB (Scotch-Brite), 6k, 8k, 12k, LASER, EMBOSSED
Customized ServicesSupport customization
Processing ServicesCutting, bending/forming, welding, hole processing/grooving, surface treatment, custom processing, etc.
ApplicationAerospace industry
Heat exchangers
High-temperature applications
Pharmaceutical industry
Power generation
Refining industry
Furnace components
Exhaust systems
Welded equipment
Cryogenic applications
Structural applications
Boiler tubes
Heat treatment equipment
Automotive industry
Petrochemical industry
Architectural applications
304LThe requirement is for resistance to intergranular corrosion, not for high-temperature strength
3CR12Only a mild “high temperature” environment is present… up to about 600 °C.
304HOnly a mild “high temperature” environment is present… up to about 800 °C.
310The temperature of the operating environment is up to about 1100 °C – too high for 321 or 321H.
The temperature of the operating environment is up to about 1150 °C- too high for 321 or 321H.
Parameters Of 321 Stainless Steel
ElementComposition (%)
Carbon (C)0.08 max
Silicon (Si)0.75 max
Manganese (Mn)2.00 max
Phosphorus (P)0.045 max
Sulfur (S)0.030 max
Chromium (Cr)17.0 – 19.0
Nickel (Ni)9.0 – 12.0
Titanium (Ti)5 × C min, 0.70 max
Tensile Strength515 – 730 MPa
Yield Strength205 – 275 MPa
Elongation40% min
Modulus of Elasticity193 GPa
Poisson’s Ratio0.3
Hardness (Rockwell B)95 max
Density7.92 g/cm³
Melting Range1398-1446°C
Thermal Conductivity16.3 W/m·K
Electrical Resistivity0.75 μΩ·m
Magnetic PropertiesNonmagnetic
Coefficient of Expansion16.5 μm/m·K
Why Choose Gnee 321 Stainless Steel Company?

Gnee, as a Chinese stainless steel supplier with 15 years of history, exports to 60+ countries. We provide various shapes of stainless steel, including plates, coils, pipes, bars, and fittings. Gnee is committed to providing comprehensive stainless steel solutions, with excellent after-sales service, we support customization and ensure product quality.

In addition, our stainless steel has been successfully exported to more than 60 countries such as Singapore, Malaysia, The United Arab Emirates, Oman, Turkey, Nigeria, Egypt, Kuwait, Indonesia, Qatar, and Kenya. Many regular customers come to visit our company and factory and make multiple orders.

What Services Does Gnee Provide?

Gnee can provide the following measurement services for stainless steel:

Dimensional Measurement: Measure dimensional parameters such as length, width and thickness by measuring instruments to ensure that the stainless steel is qualified and meets the design requirements.
Surface Measurement: Measure parameters such as flatness, bumpiness and surface roughness of the stainless steel surface to help ensure that the quality and surface condition of the stainless steel meets the requirements.
Thickness Measurement: Use thickness gauges to accurately measure the thickness of the stainless steel to ensure it meets the design requirements.
Material Measurement: Use material analysis instruments to measure the chemical composition and mechanical properties of the stainless steel to ensure that the quality and properties of the stainless steel meet the requirements.
Bending And Deformation Measurements: Use tools such as bending gauges and displacement sensors to measure and monitor the degree of bending and deformation of stainless steel to ensure that it is within the allowable range.

Ask Measurement service

Gnee can customize the size and shape of your stainless steel for your specific project needs. Custom design of stainless steel is carried out by a team of professional engineers and designers. Based on the project requirements and constraints, they will use calculation and simulation tools combined with experience and technical knowledge to optimize the stainless steel design to meet the specific needs of your different projects

● Adjustment of the thickness, width and length of stainless steel based on load calculations and strength requirements for structural design.
● The shape of the stainless steel can be designed according to the demand characteristics.
● If the convenience of installation and maintenance is considered, we can also add openings and passages for easy access and operation in the design for areas that require frequent maintenance.

Ask Customized Services

Sourcing Gnee stainless steel can provide the following further processing services. We can customize to meet the specific needs of our customers for different projects.

Cutting Service: Stainless steel can be custom cut to obtain the desired shape and size according to the customer’s needs. For example, flame cutting, plasma cutting, laser cutting, etc., can cut stainless steel into desired plates, blocks, shaped pieces, etc.
Bending & Forming: Stainless steel is bent and formed by applying stress and appropriate processes to obtain the desired shape.
Welding Services: Stainless steel can be subjected to various types of welding services, including manual arc welding, gas-shielded welding, laser welding, etc.
Hole Turning And Machining: Stainless steel is turned and holes are machined through the use of machining equipment. These processes produce smooth surfaces, precise holes and threads to meet specific assembly requirements.
Surface Treatments: Surface treatments can be applied to improve the corrosion resistance and aesthetics of the stainless steel. This includes methods such as painting, hot dip galvanizing, and electroplating to add a protective layer and provide corrosion resistance.

Ask Deep Processing Services

Gnee stainless steel can provide testing and the following third-party inspection services. These third-party testing services provide independent and objective verification of stainless steel’s compliance with relevant standards and regulations.

Mechanical Property Testing: Used to determine whether the strength, toughness, ductility and other mechanical properties of stainless steel meet the specified requirements.
Chemical Composition Analysis: Quantitative determination of elements on stainless steel samples through spectral analysis, atomic absorption spectroscopy, inductive coupling and other technologies.
Corrosion Performance Test: Common corrosion performance test methods include salt spray corrosion test, acid-base corrosion test and electrochemical corrosion test.
Tensile Strength Test: Through the tensile test, the parameters such as yield strength, tensile strength and breaking strength of stainless steel during the tensile process are measured.
Non-Destructive Testing: Non-destructive testing is used to evaluate hidden defects, cracks and looseness in stainless steel materials. Common methods include ultrasonic testing, magnetic particle testing, eddy current testing, and radiographic testing.
Pressure Test: By exposing stainless steel products to a specific pressure, it is tested whether there are problems such as leakage or deformation to ensure that its pressure resistance meets the requirements.
Surface Quality Test: Used to evaluate the surface flatness, smoothness and oxide layer of stainless steel products.
Welding Performance Test: Check the appearance, mechanical properties and metallographic microstructure of the weld to ensure that the quality of the stainless steel welded joint meets the requirements.
Metallographic Inspection: Through metallographic inspection, the structure, grain size, non-metallic inclusions, etc. of stainless steel are checked to evaluate its quality and performance.

Ask Testing Services
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