exporter of all 321 Stainless Steel Pipes Tubes | Suppliers 321 Stainless Steel Pipes Tubes Exporters Traders and Manufacturers of Seamless Welded Erw Fabricated Pipes Tubes Tubing India

stainless steel pipes, stainless steel tubes, steel flanges, steel butt weldings, steel pipe fittings
321 Stainless Steel Pipes Tubes
321 Stainless Steel Pipes Tubes Tubing 321 Stainless Steel Pipes Tubes Tubing
sheet plate flanges pipe tube tubing flange coil strip pipie nipple fasteners bolts nuts screws fittings elbow pipefitting sheetmetal metal supply 321 Stainless Steel Pipes Tubes Tubing 321 Stainless Steel Pipes Tubes Tubing
321 Stainless Steel Pipes Tubes Tubing sheet plate flanges pipe tube tubing flange coil strip pipie nipple fasteners bolts nuts screws fittings elbow pipefitting sheetmetal metal supply
321 Stainless Steel Pipes Tubes Tubing 321 Stainless Steel Pipes Tubes Tubing
321 Stainless Steel Pipes Tubes Tubing 321 Stainless Steel Pipes Tubes Tubing
321 Stainless Steel Pipes Tubes Tubing 321 Stainless Steel Pipes Tubes Tubing 321 Stainless Steel Pipes Tubes Tubing
321 Stainless Steel Pipes Tubes Tubing 321 Stainless Steel Pipes Tubes Tubing

321 Stainless Steel Pipes Tubes Tubing

321 Stainless Steel Pipes Tubes Tubing 321 Stainless Steel Pipes Tubes Tubing


321 Stainless Steel Pipes Tubes Tubing

 

321 Stainless Steel Pipes Tubes Tubing
321 Stainless Steel Pipes Tubes Tubing
321 Stainless Steel Pipes Tubes Tubing
321 Stainless Steel Pipes Tubes Tubing

Suppliers Exporters Traders Manufacturers India

Suppliers Exporters Traders Manufacturers India

Suppliers Exporters Traders Manufacturers India

Stainless & Duplex Steel
321 Stainless Steel Pipes Tubes Tubing
Steel Tubes India is a highly acclaimed manufacturer and exporter of 321 Stainless Steel Pipes Tubes | Suppliers 321 Stainless Steel Pipes Tubes Exporters 321 Stainless Steel Pipes Tubes Traders and Manufacturers of 321 Stainless Steel Pipes Tubes India
We Export : Western Australia , Queensland, New South Wales, South Australia, Victoria, Australian Capital Territory, Tasmania, Northern Territory, Ontario, British Columbia, Yukon Territory, Alberta, Manitoba, Saskatchewan, Newfoundland, Prince Edward Island, New Brunswick, Nova Scotia, Eastern Cape, Gauteng, Kwazulu-Natal, Western Cape, England, Scotland, Wales, Northern Ireland, Lagos, Abuja Capital Territory, Vadodara, Mumbai, Chennai, New Delhi, Mahape, Gurgaon, Noida, Bangalore, Coimbatore, Cochin, Ash Sharqiyah, Ar Riyad, Makkah, Dhahran , Riyadh, Jiddah, Jeddah, Masqat, Kwazulu-Natal, Gauteng, Western Cape, Free State, Eastern Cape, Alberta, Saskatchewan, British Columbia, Newfoundland, New Brunswick, Manitoba, Ontario, Nova Scotia, Quebec, Calgary, Edmonton, Vancouver, Toronto, Birmingham, Brentford, Manchester, Bristol, Sheffield, Milton Keynes, London, Poplar, Edinburgh, Thames Ditton
Send Enquiry

Stainless Steel Pipes & Tubes

Grades: Type 304 | Type 304L | Type 304H | Type 316 | Type 316L | Type 316H | Type 317L | Type 321 | Type 347  | Type 410 | Type 904L | UNS 32750 Duplex |

321 Stainless Steel Pipes and Tubes

Type 321 is a standard austenitic 18/8 chromium nickel alloy with the addition of Titanium making it an excellent choice in elevated temperature environments.

The titanium stabilises the material removing its susceptibility to the effects of intergranular corrosion. 321 is therefore the stainless steel material of choice for applications in working environments up to 9000 C.

A drawback of Type 321 is that the titanium does not transfer well across a high temperature arc, so it is not recommended as a welding consumable. 

In such instances, 347 is the preferred choice as the Niobium performs the same function as Titanium but can be still transferred across a high temperature arc. Type 347 is therefore the consumable of choice for welding Grade 321. 

The steel has excellent forming and welding qualities and excellent toughness even at cryogenic temperatures. If you are looking for a stainless steel to provide resistance to intergranular corrosion, 304L is the normal choice as it is a more commonly used and supplied steel.

However, 321 is a much better option in operating temperature environments in excess of 5000 C and therefore have its own merits. 

Note that Type 321 does not polish well so it is not practical to use this material as cosmetic architectural feature.

Product Range

Specifications: ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790
Sizes (Seamless): 1/2" NB - 24" NB
Sizes (ERW): 1/2" NB - 24" NB
Sizes (EFW): 6" NB - 100" NB  

Wall Thickness available:
Schedule 5S - Schedule XXS (heavier on request)

Other Materials Testing:

NACE MR0175, H2 SERVICE, OXYGEN SERVICE, CRYO SERVICE, etc.

Dimensions:


All Pipes is manufactured and inspected/tested to the relevant standards including ASTM, ASME and API etc.

Send Enquiry



Background of 321 Stainless Steel Pipes and Tubes

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 425-8500C. Grade 321 is the grade of choice for applications in the temperature range of up to about 9000C, combining high strength, resistance to scaling and phase stability with resistance to subsequent aqueous corrosion.

Grade 321H is a modification of 321 with a 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 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 5000C.

Send Enquiry



Composition of 321 Stainless Steel Pipes and Tubes
Typical compositional ranges for grade 321 stainless steels are given in table 1.

Table 1. Composition ranges for 321 grade stainless steel

Grade C Mn Si P S Cr Mo Ni N Other
321 min.
max
-
0.08
2.00 0.75 0.045 0.030 17.0
19.0
- 9.0
12.0
0.10 Ti=5(C+N)
0.70
321H min.
max
0.04
0.10
2.00 0.75 0.045 0.030 17.0
19.0
- 9.0
12.0
- Ti=4(C+N)
0.70
347 min.
max
0.08 2.00 0.75 0.045 0.030 17.0
19.0
- 9.0
13.0
- Nb=10(C+N)
1.0

Mechanical Properties of 321 Stainless Steel Pipes and Tubes
Typical mechanical properties for grade 321 stainless steels are given in table 2.

Table 2. Mechanical properties of 321 grade stainless steel

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
321 515 205 40 95 217
321H 515 205 40 95 217
347 515 205 40 92 201
321H also has a requirement for a grain size of ASTM No 7 or coarser.
Send Enquiry

Physical Properties of 321 Stainless Steel Pipes and Tubes
Typical physical properties for annealed grade 321 stainless steels are given in table 3.

Table 3. Physical properties of 321 grade stainless steel in the annealed condition

Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (m/m/0C) Thermal Conductivity (W/m.K) Specific Heat 0-1000C (J/kg.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
321 8027 193 16.6 17.2 18.6 16.1 22.2 500 720

Grade Specification Comparison of 321 Stainless Steel Pipes and Tubes
Approximate grade comparisons for 321 stainless steels are given in table 4.
Table 4. Grade specifications for 321 grade stainless steel

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
321 S32100 321S31 58B, 58C 1.4541 X6CrNiTi18-10 2337 SUS 321
321H S32109 321S51 - 1.4878 X10CrNiTi18-10 - SUS 321H
347 S34700 347S31 58G 1.4550 X6CrNiNb18-10 2338 SUS 347
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.
Send Enquiry

Corrosion Resistance of 321 Stainless Steel Pipes and Tubes

Equivalent to Grade 304 in the annealed condition and superior if a weldment in these grades has not been post-weld annealed or if the application involves service in the 425-9000C range. Subject to pitting and crevice corrosion in warm chloride environments, and to stress corrosion cracking above about 600C. Considered resistant to potable water with up to about 200mg/L chlorides at ambient temperatures, reducing to about 150mg/L at 600C.
.
Heat Treatment of 321 Stainless Steel Pipes and Tubes

Solution Treatment (Annealing) - heat to 950-11200C and cool rapidly for maximum corrosion resistance.
Stabilising - heat to 870-9000C for 1 hour per 25mm of thickness and air cool. Stabilisation is recommended for most severe service conditions (above 4250C) and particularly for material annealed at the upper side of the annealing temperature range.

Stress Relief - Heat to 7000C for 1 to 2 hours and air cool. These grades cannot be hardened by thermal treatment.

 

Stainless Steel Pipes Tubes
Stainless Steel SS Seamless Pipe
Stainless Steel SS Seamless Tube
Stainless Steel SS Welded Pipe
Stainless Steel SS Saw Pipe Tube
Stainless Steel SS Round Pipe Tube
Stainless Steel SS Dom Pipe Tube
Stainless Steel SS Erw Pipe Tube
Stainless Steel SS Line Pipe Tube
Stainless Steel SS Hollow Pipe Tube

ASTM / ASME SA 312 GR. TP 304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316TI, 316H, 316LN, 317, 317L, 321, 321H, 347, 347H, 904L.

ASTM / ASME SA 358 CL 1 & CL 3 GR . 304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316H, 321, 321H, 47.

 
Duplex Steel Pipes And Tubes
Duplex Steel Pipes Tubes
Duplex Steel Seamless Pipe
Duplex Steel Seamless Tube
Duplex Steel Welded Pipe Tube
Duplex Steel Saw Pipe Tube
Duplex Steel Round Pipe Tube
Duplex Steel Dom Pipe Tube
Duplex Steel Erw Pipe Tube
Duplex Steel Line Pipe Tube
Duplex Steel Hollow Pipe Tube

ASTM / ASME SA 790 UNS NO S 31803, S 32205, S 32550, S 32750, S 32760.

PRODUCTS LIST :
  • Seamless Pipes Tubes Tubing
  • Dom Pipes Tubes Tubing
  • Saw Pipes Tubes Tubing
  • Line Pipes Tubes Tubing
  • Hollow Pipes Tubes Tubing
  • Rectangular Pipes Tubes Tubing
  • Round Pipes Tubes Tubing
  • Square Pipes Tubes Tubing
  • Water Pipes Tubes Tubing
  • Steel Casing Pipes Tubes Tubing
  • Sewage Pipes Tubes Tubing
  • Structural Steel Pipes Tubes Tubing
  • Industrial Steel Pipes Tubes Tubing
  • Steel Scaffolding Pipes Tubes Tubing
  • Oil & Gas Pipes Tubes Tubing
  • Erw Pipes Tubes Tubing
  • Ibr Pipes Tubes Tubing
  • Boiler Pipes Tubes Tubing
  • Saw Pipes Tubes Tubing
  • Welded Pipes Tubes Tubing
  • Rectangular Pipes Tubes Tubing
  • Square Pipes Tubes Tubing
  • Fabricated Pipes Tubes Tubing
  • Galvanized Pipes Tubes Tubing
  • Coating Pipes Tubes Tubing
  • Large Diameter Pipes Tubes Tubing
  • Nace Pipes Tubes Tubing
  • Low Alloy Steel Pipes Tubes Tubing
  • Polish Pipes Tubes Tubing
  • Alloy 20 Pipes Tubes Tubing
  • Monel Pipes Tubes Tubing
  • Inconel Pipes Tubes Tubing
  • Nickel Pipes Tubes Tubing
  • Cupro Nickel Pipes Tubes Tubing
  • Hastelloy Pipes Tubes Tubing
  • Mild Steel Pipes Tubes Tubing
  • Titanium Pipes Tubes Tubing
  • Ss Stainless Steel Pipes Tubes Tubing
  • Brass Pipes Tubes Tubing
  • Copper Pipes Tubes Tubing
  • Cast Iron Carbon Steel Pipes Tubes Tubing
  • Low Temperature Carbon Steel Pipes Tubes Tubing
  • Carbon Steel Pipes Tubes Tubing
  • Nickel Alloy Pipes Tubes Tubing
  • Nickel Pipes Tubes Tubing
  • Copper Nickel Pipes Tubes Tubing
  • Alloy Steel Pipes Tubes Tubing
  • Super Duplex Steel Pipes Tubes Tubing
  • Duplex Steel Pipes Tubes Tubing
 
Send Enquiry
321 Stainless Steel Pipes Tubes Tubing
 
321 Stainless Steel Pipes Tubes Tubing
   

Home | About Us | Products | Quality | Inquiry Form | Contact  

exporter of all 321 Stainless Steel Pipes Tubes | Suppliers 321 Stainless Steel Pipes Tubes Exporters Traders and Manufacturers of Seamless Welded Erw Fabricated Pipes Tubes Tubing India