321H Stainless steel Pipe is a general purpose austenitic stainless steel that is stabilized against carbide precipitation and designed to work within the carbide precipitation temperature range 427 to 816°C (800 to 1500°F). It is non-magnetic in the annealed condition and can be hardened only by cold working. Titanium is added to the alloy's composition to suppress grain boundary chromium carbide precipitation and reduce susceptibility to intergranular corrosion.
321H Stainless steel Pipe is the higher carbon (0.04 - 0.10) version of the alloy. It was developed for enhanced creep resistance and for higher strength at temperatures above 1000oF (537°C). In most instances, the carbon content of the pipe enables dual certification.
Stainless Steel DIN 1.4541 / 1.4878 Seamless TubesStockist, SS UNS S32100 / S32109 Seamless Tubing, SS 321 Cold Drawn Tubes, SS 321H Seamless Tubes, SS 321 Seamless Tubing In India.
Production, Supply, Stock Range of Stainless Steel 321H Pipes and Stainless Steel 321H Tubes
Outside Diameter:6.00 mm OD up to 250 mm OD, Sizes up to 12” NB available Ex-stock, OD Size Steel Tubes available Ex-stock
Thickness Range:0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Type: Seamless / ERW / Welded / Fabricated / CDW
Form: Round Pipes/Tubes, Square Pipes/Tubes, Rectangular Pipe/Tubes, Coiled Tubes, "U” Shape, Pan Cake Coils, Hydraulic Tubes
Length: Single Random, Double Random & Required Length End: Plain End, Beveled End, Treaded
End Protection: Plastic Caps | Outside Finish: 2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Pipes, Finish as per customer Requirements
Delivery Condition: Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
Inspection, Test Reports: Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports
Packing: Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests
Specials: Sizes and Specifications other than above can be manufactured on request
Why Choose Prosaic Steel and Alloys for Stainless Steel 321, 321H, UNS S32100, UNS S32109, WNR 1.4541, WNR 1.4878 Pipes & Tubes?
321/321H Stainless Steel Pipes, 321/321H Stainless Steel Tubes Value Added Processing Services
Markings on the Stainless Steel 321, 321H, UNS S32100, UNS S32109, WNR 1.4541, WNR 1.4878 Seamless/Welded Pipes
The full identification of the Pipe should be continuously marked down its whole length, including:
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.
Typical compositional ranges for grade 321 stainless steels are given in table 1.
Table 1. Composition ranges for 321H grade stainless steel
Typical mechanical properties for grade 321 stainless steels are given in table 2.
Table 2. Mechanical properties of 321H 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|
|321H also has a requirement for a grain size of ASTM No 7 or coarser.|
Typical physical properties for annealed grade 321 stainless steels are given in table 3.
Table 3. Physical properties of 321H 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|
Approximate grade comparisons for 321H stainless steels are given in table 4.
Table 4. Grade specifications for 321H grade stainless steel
|Grade||UNS No||Old British||Euronorm||Swedish SS||Japanese JIS|
|321||S32100||321S31||58B, 58C||1.4541||X6CrNiTi18-10||2337||SUS 321|
|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.|
Corrosion Resistance of 321H Stainless Steel Pipes
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 321H Stainless Steel Pipes
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.
321H Stainless Steel Pipe Packing
321H Stainless Steel Seamless Pipes is sleeved into plastic bag individually, pieces wrapped with water-proof material, bundled with nylon rope. Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D. Great care is taken during operation and transportation. SS 321H ASTM A312 Seamless Pipe packing will be according to international standard in bundles strapped by strips then into containers to avoid any damage.
Delivery: Within 10-25 days or asap if we have enough stock
|Sr. No.||Product Description||Outside Diamter, OD (in mm)||Wall Thickness, WT (in mm)|
|1||321/321H Stainless Steel Round Pipe/Tube||6mm – 630mm||0.5mm-30mm|
|2||321/321H Stainless Steel Square Pipe/Tube||12.7mm* 12.7mm to 300mm* 300mm||0.5mm-30mm|
|3||321/321H Stainless Steel Rectangular Pipe/Tube||10*20mm to 100*200mm||0.5mm-30mm|
|4||321/321H Stainless Steel Colour Coated Pipe/Tube||6mm to 630mm||0.5mm-30mm|
|5||321/321H Stainless Steel Ornamental Tubes||12.7mm to 76.2mm||0.5mm-2.0mm|
|6||321/321H Stainless Steel Electropolished Pipes/Tubes||12.7mm to 250mm||0.5mm-30mm|
|7||321/321H Stainless Steel Slot Round Pipe/Tube||12.7mm to 76.2mm||0.5mm-2.0mm|
|8||321/321H Stainless Steel Triangle Tube||16mm to 85mm||0.5mm-3.0mm|
|9||321/321H Stainless Steel Hexagonal Tube||13mm to 85mm||0.5mm-2.0mm|
|10||321/321H Stainless Steel Handrail Tube||–||0.5mm-2.0mm|
|11||321/321H Stainless Steel U Shaped Tube||20mm to 200mm||0.5mm-2.0mm|
|12||321/321H Thin-Wall Stainless Steel Tube||22mm*0.7mm to 108mm*2.0mm||0.5mm-2.0mm|
|13||321/321H Inner/Outside Polished Stainless Steel Tube, Pipes||12.5mm to 203.2mm||1.0mm – 5mm|
|14||321/321H Stainless Steel Capillary Tube||0.28mm to 10mm||0.08mm – 1.2mm|
|15||321/321H Stainless Steel Seamless Tube||6mm to 430mm||0.8mm – 30mm|
We export 321H Stainless Steel Seamless Pipe to Saudi Arabia, Iran, Iraq, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen, Syria, israel, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Mayanmar, Taiwan, Cambodia, Argentina, Bolivia, Brazil, Chile, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Costa Rica, Puerto Rica, Trinidad And Tobago, Jamaica, Bahamas, Denmark, Russia, Norway, Germany, France, Italy, United Kingdom, Spain, Ukraine, Netherland, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Switzerland, Slovakia, Finland, Ireland, Croatia, Slovenia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Equatorial Guinea, The Republic Of Congo, Gabon, Europe, Africa, Asia, North America, South America, Middle East, Far East.etc.
Prosaic Steel and Alloys is a well known worldwide exporter of 321 Stainless Steel Seamless Pipes, Prosaic Steel and Alloys is committed to provide each and every customer with the highest standard of customer service. We deals in 321H Stainless Steel Seamless Pipes in India & Overseas, offering a wide range of 321 Stainless Steel Seamless Pipes.