Home / Stainless Steel Products / SS 321/321H Tubes
For use in marine and automotive applications, our Stainless Steel 321 Electropolish Tubes are 100 % stainless steel and are available with varying tensions. Stainless Steel 321H Rectangular Tubes is often used in Chemical and petrochemical process equipment, pulp and paper manufacturing and condensers in fossil and nuclear fueled power generation stations. SS 321 Square Tubes is molybdenum bearing grade austenitic stainless steel that provides improved corrosion resistance over 304L and 316L stainless steels. Stainless Steel 321H Round Tube does not perform well in chloride solutions, even in small concentrations, or in sulfuric acid service. In order to provide optimum resistance in SS 321 ERW Tubes to intergranular corrosion and to polythionic acid stress corrosion cracking in service temperatures at 1500°-1650°F an air cool may be used. This titanium addition in Stainless Steel 321H EFW Tubes reduces or prevents carbide precipitation during welding and in the 800°-1500°F service conditions.
Stainless Steel 321 Welded Tubes was developed for use in the chromium carbide precipitation range of 1800 – 1500°F (427 – 816°C) where un-stabilized alloys such as 304 are subject to intergranular attack. Stainless Steel 321H Seamless Tubes is stabilized against chromium carbide formation by the addition of titanium. We are among renowned production house for SS 321 Tubes, which 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.
Equivalent Grades for 321/321H Stainless Steel Tubes
Grade | North America | France | European | Japan | Russia | European | Italy | Austria | Sweden |
UNS | AFNOR | W.N. | JIS | GOST | EN | UNI | ONORM | SIS | |
SS 321 | S32100 | – | 1.4541 | SUS 321 | – | X6CrNiTi18-10 | – | – | – |
321/321H SS Welded Tube Chemical Composition
Grade | C | Mn | Si | P | S | Cr | N | Ni | Tie |
SS TP 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
Stainless Steel 321/321H Seamless Tubes Mechanical Properties
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
NOTE : OTHER SIZES AND GRADES ARE AVAILABLE UPON REQUEST
SS 321/321H Seamless Tubes are available in different grades and standards. Some of the standard features
these are made available in include
Specifications : ASTM A/ASME SA213/A249/A269
Dimensions : ASTM, ASME and API
Size : 1/8″NB TO 30″NB IN
SS Tubes : 1/2″ NB – 16″ NB
SS ERW Tubes : 1/2″ NB – 24″ NB
SS EFW Tubes : 6″ NB – 100″ NB
Specialized in : Large Diameter Size
Schedule : SCH20, SCH30, SCh30, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160,
XXS
Form : Round, Square, Rectangular, Hydraulic Etc
Length : Single Random, Double Random & Cut Length
End : Plain End, Beveled End, Treaded
Type : Seamless / ERW / Welded / Fabricated / LSAW Tubes
MOST SEARCHED PRODUCTS
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