Stainless Steel 321 Seamless Tube

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Neeka Tubes is a global manufacturer & supplier of Stainless Steel 321 Seamless Tubing, offering high-quality solutions for industrial applications. UNS S32100 Seamless Tubing is a titanium-stabilized austenitic stainless steel with excellent resistance to oxidation and intergranular corrosion. Designed for high-temperature environments, it provides durability, strength and superior performance in harsh conditions.

Seamless Tubing SS 321 has Nickel, ranging from 9% to 12%, Chromium, which is between 17 to 19% and titanium of 4(C+N) to give the best corrosion resistance. With a tensile strength of 515 MPa and yield strength of 205 MPa, it offers high mechanical stability. The tubing has 40% elongation and its Rockwell hardness is 95HRB while the Brinell hardness is 217HB, thus making it suitable for various applications.

SS 321 Seamless Tubes, ASTM A213 TP 321 SS Seamless Tubes Suppliers, SS UNS S32100 Seamless Tubing, SS 321 Seamless Tube, SS UNS S32100

321 stainless steel tube.
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Features of Stainless Steel 321 Seamless Tubing

Features of Stainless Steel 321 Seamless Tubing

  • Excellent Heat Resistance: Our stainless steel 321 seamless tubes withstands high temperature without losing or wrapping strength. It performs well in industrial heating systems and high temperature applications.
  • Superior Corrosion Resistance: These tubes don’t rust, oxidize or get damaged by chemicals. They are strong and dependable even in humid or slightly acidic conditions so it can be used in a wide range of industries.
  • High Strength & Durability:  321 seamless tubes are strong and built to last. They handle pressure, stress, and mechanical wear ensuring reliable performance in demanding applications.
  • Better Weldability: It’s easy to weld and join these tubes. Quickly, smooth, strong welds form that keep the tube’s integrity over time and make sure the connections are safe.
  • Long Service Life: Stainless steel 321 tubes will work well for years. As they are resistant to heat, corrosion and wear, they need less maintenance and replacement which saves time and money.
Our UNS S32100 tubing is widely used in aerospace, heat exchangers, petrochemical plants and power generation industries due to its high resistance to high-pressure and high-temperature environments. We offer tubes in the range of 6.35 mm OD to 101.6 mm OD, with a gauge of 25 SWG–10 SWG, an outer diameter of 3.00 mm–219.10 mm, and a wall thickness of 0.40 mm–12.70 mm, with lengths up to 30 meters or custom-cut sizes. Also, our tubes adhere to ASTM A213 / ASTM SA213 specifications, ensuring high-quality standards.  

Most Common Types of Stainless Steel 321 Seamless Tubing

304

SS 321 Seamless Tube

304-round

321 SS Round Tube

square-tube

SS 321 square Tube

rectangular

SS 321 Rectangular Tube

ss-welded-coil

SS 321 Welded Steel Coil Tube

Stainless steel capillary tubes used for precision applications.

321 Stainless Steel Capillary Tube

Polished stainless steel tubes with a smooth surface finish.

Stainless Steel 321 Polished Tube

Cold-drawn seamless stainless steel pipe for precision engineering applications.

Stainless Steel 321 Cold Drawn Seamless Tube

Stainless Steel 321 Seamless Tubing Specifications

Tube Range6.35 mm OD To 101.6 mm OD
Gauge25 SWG – 10 SWG
Outer Diameter3.00 mm – 219.10 mm
Wall Thickness0.40 mm – 12.70 mm
Schedules5, 10S, 10, 30, 40S, 40, 80, 80S, XS, 160, XXH
LengthUp to 30 meters, Custom Cut Lengths
SpecificationsASTM A213 / ASTM SA213
TypesRound, Square, Rectangle, Coil, “U” Shape, Hydraulic & Honed Tubes
Looking For Fastest Delivery of 321 Stainless Steel Seamless Tubing in Mumbai? Find Your Sizes and Thickness of SS 321 Seamless Tube in Our Ready Stock.
Element SS 321 SS 321H
Ni 09 – 12 09 – 12
N 0.10 0.10
Cr 17 – 19 17 – 19
C 0.08 max 0.04 – 0.08
Si 1 max 0.75 max
Mn 2 max 2 max
P 0.040 max 0.045 max
S 0.030 max 0.03 max
Ti 4(C+N) 0.70 max
Grade 321 321H
Tensile Strength (MPa) min 515 515
Yield Strength 0.2% Proof (MPa) min 205 205
Elongation (% in 50mm) min 40 40
Hardness
Rockwell B (HR B) max 95 95
Brinell (HB) max 217 217
STANDARD UNS WERKSTOFF NR.
SS 321 S32100 1.4541
SS 321H S32109 1.4878

Contact Neeka tubes today for a best offer & competitive quotation Of Stainless Steel 321 Seamless Tubing
Please Call on +91 7700067892 or drop an E-Mail : sales@neekatubes.net

Stainless Steel 321 Seamless Tubing Dimensions In MM

Nominal Pipe SizeOutside Diameter (mm)Nominal Wall Thickness Schedule
NPSDNODSCH5sSCHl0sSCH 10SCH 20SCH 30SCH40sSCH STDSCH 40SCH 60SCH80sSCH XSSCH 80SCH 100SCH 120SCH 140SCH 160SCH XXS
1/8610.3 1.24   1.731.731.73 2.412.412.41     
1/4813.7 1.65   2.242.242.24 3.023.023.02     
3/81017.1 1.65   2.312,312.31 3.203.203.20     
1/21521.31.652.11   2.772.772.77 3.733.733.73   4.787.47
3/42026.71.652.11   2.872.872.87 3.913.913.91   5.567.82
12533.41.652.77   3.383.383.38 4.554.554.55   6.359.09
1 1/43242.21.652.77   3.563.563,56 4.854.854.85   6.359.70
1 1/24048.31.652.77   3.683.683.68 5.085.085.08   7.1410.15
25060.31.652.77   3.913.913.91 5.545.545.54   8.7411.07
2 1/265732.113.05   5.165.165.16 7.017.017.01   9.5314.02
38088.92.113.05   5.495.495.49 7.627.627.62   11.1315.24
3 1/290101.62.113.05   5.745.745.74 8.088.088.08     
4100114.32.113.05   6.026.026.02 8.568.568.56 11.13 13.4917.12
5125141.32.773.40   6.556.556.55 9.539,539.53 12.70 15.8819.05
6150168.32.773.40   7.117.117.11 10.9710.9710.97 14.27 18.2621.95
8200219.12.773.76 6.357.048.188.188.1810.3112.7012.7012.7015.0918.2620.6223.0122.23
10250273.13.404.19 6.357.809.279.279.2712.7012.7012.7015.0918.2621.4425.4028.5825.40
12300323.93.964.57 6.358.389.539.5310.3114.2712.7012.7017.4821.4425.4028.5833.3225.40
14350355.63.964.786.357.929.53 9.5311.1315.09 12.7019.0523.8327.7931.7535.71 
16400406.44.194.786.357.929.53 9.5312.70i6.66 12.7021.4426.1930.9636.5340.49 
18450457.24.194.786.357.9211.13 9.5314.2719.05 12.7023.8329.3634.9339,6745.24 
205005084.785.546.359.5312.70 9.5315.0920.62 12.7026.1932.5438.1044.4550.01 
22 5594.785.546.359.5312.70 9.53 22.23 12.7028.5834.9341.2847.6353.98 
246006105.546.356.359.5314.27 9.5317.4824.61 12.7030.9638.8946.0252.3759.54 
26 660  7.9212.70  9.53   12.70      
28700711  7.9212.7015.88 9.53   12.70      
30 7626.357.927.9212.7015.88 9.53   12.70      
32800813  7.9212.7015.88 9.5317.48  12.70      
34 884  7.9212.7015.88 9.5317.48  12.70      
36900914  7.9212.7015.88 9.5319.05  12.70      
38 965      9.53   12.70      
4010001016     9.53 12.70         
42 1067   12.7015.88 9.5319.05  12.70      
4411001118      9.53   12.70      
46 1168      9.53   12.70      
4812001219      9.53  12.70       
52 1321                 
561422                  
601524                  

SS 321 Seamless Tubing Thickness Chart

NPS
(DN)		WEIGHT
LB/FT
(KG/M)		SCHOutside Diameter
IN
(Milimeter)		IDWT
IN
(Milimeter)
32
(800)		84.085
(126.032)		.0.0.032.00
(813)		.0.0.00.025
(6.035)
32
(800)		95.028
(141.09)		.0.0.032.00
(813)		.0.0.00.0281
(7.014)
32
(800)		105.069
(157.025)		1032.00
(813)		.0.0.00.0312
(7.092)
32
(800)		116.041
(173.035)		.0.0.032.00
(813)		.0.0.00.0344
(8.074)
32
(800)		126.078
(188.083)		.0.0.032.00
(813)		STD0.0375
(9.053)
32
(800)		137.012
(204.009)		.0.0.032.00
(813)		.0.0.00.0406
(10.031)
32
(800)		147.078
(220.01)		.0.0.032.00
(813)		.0.0.00.0438
(11.013)
32
(800)		158.008
(235.029)		.0.0.032.00
(813)		.0.0.00.0469
(11.091)
32
(800)		168.037
(250.065)		2032.00
(813)		XS0.05
(12.07)
32
(800)		188.087
(281.009)		.0.0.032.00
(813)		.0.0.00.0562
(14.027)
32
(800)		209.062
(312.017)		3032.00
(813)		.0.0.00.0625
(15.088)
32
(800)		230.029
(342.094)		4032.00
(813)		.0.0.00.0688
(17.048)
32
(800)		250.055
(373.00)		.0.0.032.00
(813)		.0.0.00.075
(19.005)
32
(800)		270.072
(402.094)		.0.0.032.00
(813)		.0.0.00.0812
(20.062)
32
(800)		291.014
(433.052)		.0.0.032.00
(813)		.0.0.00.0875
(22.023)
32
(800)		311.047
(463.078)		.0.0.032.00
(813)		.0.0.00.0938
(23.083)
32
(800)		331.039
(493.035)		.0.0.032.00
(813)		.0.0.01.00
(25.04)
32
(800)		351.023
(522.08)		.0.0.032.00
(813)		.0.0.01.0062
(26.097)
32
(800)		371.031
(552.088)		.0.0.032.00
(813)		.0.0.01.0125
(28.058)
32
(800)		391.03
(582.064)		.0.0.032.00
(813)		.0.0.01.0188
(30.018)
32
(800)		410.09
(611.072)		.0.0.032.00
(813)		.0.0.01.025
(31.075)
34
(850)		90.02
(134.031)		.0.0.034.00
(864)		.0.0.00.025
(6.035)
34
(850)		101.029
(150.088)		.0.0.034.00
(864)		.0.0.00.0281
(7.014)
34
(850)		112.036
(167.021)		1034.00
(864)		.0.0.00.0312
(7.092)
34
(850)		123.077
(184.034)		.0.0.034.00
(864)		.0.0.00.0344
(8.074)
34
(850)		134.079
(200.082)		.0.0.034.00
(864)		STD0.0375
(9.053)
34
(850)		145.08
(217.006)		.0.0.034.00
(864)		.0.0.00.0406
(10.031)
34
(850)		157.014
(234.01)		.0.0.034.00
(864)		.0.0.00.0438
(11.013)
34
(850)		168.011
(250.027)		.0.0.034.00
(864)		.0.0.00.0469
(11.091)
34
(850)		179.006
(266.063)		2034.00
(864)		XS0.05
(12.07)
34
(850)		200.089
(299.004)		.0.0.034.00
(864)		.0.0.00.0562
(14.027)
34
(850)		222.099
(332.014)		3034.00
(864)		.0.0.00.0625
(15.088)
34
(850)		245.00
(364.092)		4034.00
(864)		.0.0.00.0688
(17.048)
34
(850)		266.058
(396.096)		.0.0.034.00
(864)		.0.0.00.075
(19.005)
34
(850)		288.008
(428.088)		.0.0.034.00
(864)		.0.0.00.0812
(20.062)
34
(850)		309.084
(461.048)		.0.0.034.00
(864)		.0.0.00.0875
(22.023)
34
(850)		331.052
(493.075)		.0.0.034.00
(864)		.0.0.00.0938
(23.083)
34
(850)		352.077
(525.03)		.0.0.034.00
(864)		.0.0.01.00
(25.04)
34
(850)		373.094
(556.073)		.0.0.034.00
(864)		.0.0.01.0062
(26.097)
34
(850)		395.036
(588.083)		.0.0.034.00
(864)		.0.0.01.0125
(28.058)
34
(850)		416.07
(620.06)		.0.0.034.00
(864)		.0.0.01.0188
(30.018)
34
(850)		437.062
(651.065)		.0.0.034.00
(864)		.0.0.01.025
(31.075)
36
(900)		95.054
(142.014)		.0.0.036.00
(914)		.0.0.00.025
(6.035)
36
(900)		107.03
(159.068)		.0.0.036.00
(914)		.0.0.00.0281
(7.014)
36
(900)		119.003
(176.097)		1036.00
(914)		.0.0.00.0312
(7.092)
36
(900)		131.012
(195.012)		.0.0.036.00
(914)		.0.0.00.0344
(8.074)
36
(900)		142.081
(212.057)		.0.0.036.00
(914)		STD0.0375
(9.053)
36
(900)		154.048
(229.077)		.0.0.036.00
(914)		.0.0.00.0406
(10.031)
36
(900)		166.051
(247.082)		.0.0.036.00
(914)		.0.0.00.0438
(11.013)
36
(900)		178.014
(264.096)		.0.0.036.00
(914)		.0.0.00.0469
(11.091)
36
(900)		189.075
(282.029)		2036.00
(914)		XS0.05
(12.07)
36
(900)		212.09
(316.063)		.0.0.036.00
(914)		.0.0.00.0562
(14.027)
36
(900)		236.035
(351.073)		3036.00
(914)		.0.0.00.0625
(15.088)
36
(900)		259.071
(386.047)		.0.0.036.00
(914)		.0.0.00.0688
(17.048)
36
(900)		282.062
(420.045)		4036.00
(914)		.0.0.00.075
(19.005)
36
(900)		305.044
(454.03)		.0.0.036.00
(914)		.0.0.00.0812
(20.062)
36
(900)		328.055
(488.089)		.0.0.036.00
(914)		.0.0.00.0875
(22.023)
36
(900)		351.057
(523.014)		.0.0.036.00
(914)		.0.0.00.0938
(23.083)
36
(900)		374.015
(556.062)		.0.0.036.00
(914)		.0.0.01.00
(25.04)
36
(900)		396.064
(589.098)		.0.0.036.00
(914)		.0.0.01.0062
(26.097)
36
(900)		419.042
(624.007)		.0.0.036.00
(914)		.0.0.01.0125
(28.058)
36
(900)		442.01
(657.081)		.0.0.036.00
(914)		.0.0.01.0188
(30.018)
36
(900)		464.035
(690.08)		.0.0.036.00
(914)		.0.0.01.025
(31.075)
38
(950)		125.07
(186.094)		.0.0.038.00
(965)		.0.0.00.0312
(7.092)
38
(950)		138.047
(206.011)		.0.0.038.00
(965)		.0.0.00.0344
(8.074)
38
(950)		150.083
(224.056)		.0.0.038.00
(965)		STD0.0375
(9.053)
38
(950)		163.016
(242.074)		.0.0.038.00
(965)		.0.0.00.0406
(10.031)
38
(950)		175.087
(261.082)		.0.0.038.00
(965)		.0.0.00.0438
(11.013)
38
(950)		188.017
(279.094)		.0.0.038.00
(965)		.0.0.00.0469
(11.091)
38
(950)		200.044
(298.026)		.0.0.038.00
(965)		XS0.05
(12.07)
38
(950)		224.092
(334.058)		.0.0.038.00
(965)		.0.0.00.0562
(14.027)
38
(950)		249.071
(371.07)		.0.0.038.00
(965)		.0.0.00.0625
(15.088)
38
(950)		274.042
(408.046)		.0.0.038.00
(965)		.0.0.00.0688
(17.048)
38
(950)		298.065
(444.041)		.0.0.038.00
(965)		.0.0.00.075
(19.005)
38
(950)		322.08
(480.024)		.0.0.038.00
(965)		.0.0.00.0812
(20.062)
38
(950)		347.026
(516.085)		.0.0.038.00
(965)		.0.0.00.0875
(22.023)
38
(950)		371.063
(553.011)		.0.0.038.00
(965)		.0.0.00.0938
(23.083)
38
(950)		395.053
(588.057)		.0.0.038.00
(965)		.0.0.01.00
(25.04)
38
(950)		419.035
(623.09)		.0.0.038.00
(965)		.0.0.01.0062
(26.097)
38
(950)		443.047
(660.001)		.0.0.038.00
(965)		.0.0.01.0125
(28.058)
38
(950)		467.05
(695.077)		.0.0.038.00
(965)		.0.0.01.0188
(30.018)
38
(950)		491.007
(730.074)		.0.0.038.00
(965)		.0.0.01.025
(31.075)

SS 321 Seamless Tubing Packing & Marking

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Packaging & Marking

Our team efficiently packed the SS 321 Seamless Tubes in wooden crates, bubble wraps and plastic covers to avoid any damage.

Every tube is marked with size, grade, specifications and heat number to ease identification in case of any confusion. Delivery is carried out efficiently across the world through reliable shipping channels. Products are packed in standard packaging or customized according to the client’s requirements.

Quality Tests & Certifications

To ensure the highest standards, ASTM A213 TP321 SS Seamless Tubes undergo stringent quality tests, including hardness testing, mechanical testing, hydrostatic testing, PMI testing and intergranular corrosion testing. We offer Mill Test Certificates (MTC), EN 10204 3.1/3.2 and third-party inspection reports for the assurance of product quality.

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