Alloy 321 (UNS S32100) is a titanium stabilized austenitic stainless steel with good general corrosion resistance. It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 –1500°F (427– 816°C).

Strip, Coil, Foil, Wire, UNS S32100, AMS 5510

APPLICATIONS

Aircraft collector rings, exhaust stacks, carburetor air intensifier tubes, exhaust manifolds, flexible couplings, jet engine parts, mufflers, pressure vessels, tubing, fasteners, flexible metal hose and bellows

DESCRIPTION

Type 321 is an austenitic chromium-nickel stainless steel containing Titanium which is recommended for parts fabricated by welding which cannot subsequently be annealed. Type 321 is a stabilized austenitic stainless steel similar to type 304 but with a titanium addition. This titanium addition reduces or prevents carbide precipitation during welding and in 800 - 1500 °F (427 - 816 °C) service. It also improves the elevated temperature properties of the alloy. Type 321 provides excellent resistance to oxidation and corrosion and possesses good creep strength.

GRADES 321 AND 347 ARE THE BASIC AUSTENITIC 18/8 STEEL (GRADE 304) STABILIZED BY TITANIUM (321) OR NIOBIUM (347) ADDITIONS. THESE GRADES ARE USED BECAUSE THEY ARE NOT SENSITIVE TO INTERGRANULAR CORROSION AFTER HEATING WITHIN THE CARBIDE PRECIPITATION RANGE OF 425-850 °C. GRADE 321 IS THE GRADE OF CHOICE FOR APPLICATIONS IN THE TEMPERATURE RANGE OF UP TO ABOUT 900 °C, COMBINING HIGH STRENGTH, RESISTANCE TO SCALING AND PHASE STABILITY WITH RESISTANCE TO SUBSEQUENT AQUEOUS CORROSION.

GRADE 321H IS A MODIFICATION OF 321 WITH HIGHER CARBON CONTENT, TO PROVIDE IMPROVED HIGH-TEMPERATURE STRENGTH.

A LIMITATION WITH 321 IS THAT TITANIUM DOES NOT TRANSFER WELL ACROSS A HIGH-TEMPERATURE ARC, SO IT IS NOT RECOMMENDED AS A WELDING CONSUMABLE. IN THIS CASE GRADE 347 IS PREFERRED - THE NIOBIUM PERFORMS THE SAME CARBIDE STABILIZATION TASK BUT CAN BE TRANSFERRED ACROSS A WELDING ARC. GRADE 347 IS, THEREFORE, THE STANDARD CONSUMABLE FOR WELDING 321. GRADE 347 IS ONLY OCCASIONALLY USED AS PARENT PLATE MATERIAL.

LIKE OTHER AUSTENITIC GRADES, 321 AND 347 HAVE EXCELLENT FORMING AND WELDING CHARACTERISTICS, ARE READILY BRAKE OR ROLL-FORMED AND HAVE OUTSTANDING WELDING CHARACTERISTICS. POST-WELD ANNEALING IS NOT REQUIRED. THEY ALSO HAVE EXCELLENT TOUGHNESS, EVEN DOWN TO CRYOGENIC TEMPERATURES. GRADE 321 DOES NOT POLISH WELL, SO IS NOT RECOMMENDED FOR DECORATIVE APPLICATIONS.

GRADE 304L IS MORE READILY AVAILABLE IN MOST PRODUCT FORMS, AND SO IS GENERALLY USED IN PREFERENCE TO 321 IF THE REQUIREMENT IS SIMPLY FOR RESISTANCE TO INTERGRANULAR CORROSION AFTER WELDING. HOWEVER, 304L HAS LOWER HOT STRENGTH THAN 321 AND SO IS NOT THE BEST CHOICE IF THE REQUIREMENT IS RESISTANCE TO AN OPERATING ENVIRONMENT OVER ABOUT 500 °C

CHEMISTRY TYPICAL

Carbon: 0.08 max
Manganese: 2.00 max
Silicon: 0.75 max
Chromium: 17.00-19.00
Nickel: 9.00-12.00
Molybdenum: 0.75 max
Phosphorus: 0.045 max
Sulfur: .030 max
Copper: 0.75 max
Nitrogen: .010 max
Titanium: 5x (Carbon+ Nitrogen) min-0.70 max
Iron: Balance

PHYSICAL PROPERTIES

Density: 0.29 lbs/in3 9.01 g/cm3

Electrical Resistivity: microhm-in (microhm-cm): 68 °F (20 °C): 28.4 (72)

Specific Heat: BTU/lb/°F (kJ/kg•K):
32 - 212 °F (0 - 100 °C): 0.12 (0.50)

Thermal Conductivity: BTU/hr/ft2/ft/°F (W/m•K):
At 212 °F (100 °C): 9.3 (16.0)
At 932 °F (500 °C): 12.8 (22.0)

Mean Coefficient of Thermal Expansion: in/in/°F (µm/m•K)
32 - 212 °F (0 - 100 °C): 9.2 x 10·6 (16.6)
32 - 600 °F (0- 315 °C): 9.5 x 10·6 (17.1)
32 - 1000 °F (0 - 538 °C): 10.3 x 10·6 (18.5)
32 - 1200 °F (0 - 649 °C): 10.7 x 10·6 (19.3)
32 - 1500 °F (0 - 873 °C): 11.2 x 10·6 (20.2)

Modulus of Elasticity: ksi (MPa)
28 x 103 (193 x 103) in tension
11 .2 x 103 (78 x 103) in torsion

Magnetic Permeability: H = 200 Oersteds: Annealed < 1.02 max
Melting Range: 2500 - 2550 °F (1371 - 1400 °C)

If you need product information or price, please fill in your contact information in the form below, we will usually contact you within 12 hours. You could also email me info@lyapm.com to get prompt reply.

1. Stock view

   

2. Processing and Technology for heating processing

Cutting processing      Quenching              Tempering                  Annealing

       

3. Quality testing

1.      Inspection Institution

Shanghai Fuda Testing Technology Group Co., LTD. Nanjing Branch  

Focus on analysis, testing, testing, r & D four service areas. Analysis fields include component analysis, formula analysis, failure analysis, structure analysis, methodology development and validation, raw material quality control/evaluation, consistency evaluation, feature analysis and other directions; The testing field involves physical and chemical properties testing, toxic and harmful substances testing, flame retardant performance testing, reliability testing and other directions; The testing field involves energy spectrum, electron microscope, spectrum, chromatography, mass spectrometry and other directions; The r&d field involves formula development, formula upgrading, formula customisation, cooperative research and development and other directions.

Beijing Zhongke Chemical Technology Research Institute 

It is a chemical technology research institution based on scientific research and testing. They adhere to paying equal attention to basic research and applied research, and combining applied research and technology transformation, developing into a comprehensive research institute characterised by "task-oriented disciplines". Approved by the relevant national departments, the company has become a third-party analysis and testing technology service unit, and has obtained CMA qualification certification. It has carried out research and development and design, analysis and testing, test and verification, generic processing, information and intellectual property services, providing public services for innovation of technology-based enterprises. Supported by the government innovation Fund, the institute has been awarded as a national high-tech enterprise.

   

2.Inspection Machining

     

   Metal composition testing machine                      Computerised Materials Torsion Testing Machine                Metal bar composite rod bending tensile strength testing machine

       3. Material test certificate

     4. Packaging 

    In the steel export activities, we also need to pack the steel to prevent the steel from being scattered in the transportation process. In the hoisting process, it is necessary to lift the steel. So steel is very necessary in the export process. Below is the picture of packaging：

According to the requirements of the state of steel materials, the use of binding, bare, frame, pallet.

Packing standard: according to the following national standard requirements (the parts beyond the requirements will be specified separately)

GB／T191 packaging-pictorial marking for handling of goods

GB／T4857 (all parts) basic test for transport packages

GB／T4879 rustproof packaging

GB／T5048 damp-proof packing

GB／T7350water-proof packing

GB／T8166 Package cushioning design

GB/T4892-1996  Hard straight square transport packaging size series

GB/T13201-91 Cylinder transport package size series

 GB/T16471-1996Design and make the size limit of transport package 

5. Logistic

       

1. Company profile

Luoyue Precision Metal established in 2018, is a leading Stockists and global distributor for Metal Raw Materials like Steel/Aluminum/ Stainless steel/Copper/ Nickel Rods, Bars, Plates, Sheets,Pipes, fittings, fasteners, Inconel alloys, Wire and Wire-Mesh to customers from aerospace, automotive, electronics, precision manufacturing, ordnance, marine, shipbuilding, oil & gas, power plant and construction.

The company has a high-precision, high-efficiency modern processing site, CNC machine tools and complete testing and inspection technology, and introduces international advanced technologies.

           2. Certificates. (Business certificate/ISO9001/Trading certificate/SGS/FormE)

                  .      

          3. Our customers 

                 Customer visits 

           4. Past Inquiry

                  .     

   1.Customer Rating

       

FAQ
1. Q: Are you a manufacturer?  
 A:No, we are not manufacturers. We have our own warehouse and our own company. I believe we will be the most suitable supplier for you.  
2. Could we visit your factory?  
 A: Sure, we welcome you to visit the factory , check our production lines and know more about our strength and quality.  
3. Q: Do you have quality control system?  
 A: Yes, we have ISO, BV, SGS certifications and our own quality control laboratory.  
4. Q: Can you arrange the shipment for us?  
 A: Yes, we have designated sea freight and railway freight forwarders with decades of experiences and we get the best  price with earliest vessel and professional service.
5. Q: How long is the delivery time?  
 A: Generally it is 7 days if we have the exact goods in our stock. If not, it will take around 15-20 days to get goods ready for delivery.  
6. Q: Can I get some samples?  
 A: We are glad to provide free samples to you, but we do not offer the freight.  
7. Q: What is your after-sale service?  
 A: We provide after-sale service and offer 100% guarantee on our products.  
8. Q: What is your MOQ?  
 A: 2 Tons  

Contact us