Stainless Steel 321 Welded Tube

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Neeka Tubes is a global manufacturer of Stainless Steel 321 Welded Tubing, offering premium-quality tubing solutions for various industries. UNS S32100 Welded Tubes are known for their excellent resistance to oxidation and corrosion at high temperatures. These tubes contain titanium, making them ideal for applications requiring high strength, durability and resistance to intergranular corrosion.

Our ASTM A249 Stainless Steel 321 Welded Tubes have a balanced composition of 17-19% chromium, 9-12% nickel and titanium stabilizers for superior performance. They have a density of 7.92 g/cm³, a melting range of 1398-1446°C and an elongation of 40%. These tubes exhibit 515 MPa tensile strength, 205 MPa yield strength and 217 Brinell hardness. We have sizes ranging from 6.35 mm O.D to 114.3 mm O.D, with thicknesses between 0.8 mm to 12.7 mm and lengths up to 26 meters. Our tubes adhere to ASTM A249 / ASTM SA249 standards.

Premium Grade SS 321 Welded Tubes, Best Deals On SS 321 Welded Tubes Price, SS 321 Welded Tubes Chart, SS 321 Welded Tubes Sizes, ASTM A312 SS 321 Welded Pipes Suppliers.

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Benefits of Stainless Steel 321 Welded Tubing

  • High Heat Resistance – Withstands temperatures up to 900°C without scaling.
  • Superior Corrosion Resistance – Resists oxidation, pitting and intergranular corrosion.
  • Excellent Weldability – Easy to fabricate and weld without carbide precipitation.
  • High Mechanical Strength – Retains strength and toughness under high-stress conditions.
  • Long Service Life – Offers durability and longevity in demanding environments.

Stainless Steel 321 Welded Tubes are widely used in aerospace, chemical processing, petroleum refining and heat exchanger systems. They are ideal for boilers, exhaust manifolds, thermal processing equipment and power plants. Their ability to withstand high temperatures makes them suitable for furnace parts and expansion joints.

Most Common Types of SS 321 Welded Tubing

SS 321 Welded Pipe

321 SS Welded Square Tube

SS 321 Welded Round Tube

SS 321 Welded Rectangular Tube

SS 321 Custom Welded Tube

321 Stainless Steel ERW Tube

SS 321 Polished Welded Tube

SS 321 Welded Cold Drawn Tube

SS 321 Welded Tubing Specifications

Standard SpecificationASTM /ASME A269, A249 /SA269, SA249
Manufacturing TypeERW / Welded / Fabricated / CDW / DOM / CEW / 100% X Ray Welded
Delivery ConditionAnnealed and Pickled (AP), Polished, Bright Annealed (BA), Cold Drawn, MF
Surface FinishBA, 2B, No.4, No.1, No.3, No.8, 8K, HL, 2D, 1D, Mirror Polished, 180G, 320G, 400G Satin/ Hairline, 400G, 500G, 600G or 800G Mirror finish ASME SA249 Standard Tubing or Custom Finish as per customer’s specification
Outside Diameter (OD)6 to 304.8 mm
Wall Thickness Range0.5 to 6 mm
StandardSUS, JIS, AISI, ASTM, GB, DIN, EN
Value Added Services
  • Cutting
  • Beveling
  • Threading
  • Polishing (Electro & Commercial)
  • Draw & Expansion as per required Size & Length
  • Destructive and Non Destructive
  • Ultrasonic Testing
  • Annealed & Pickled Bending
Processing ServiceBending, Welding, Decoiling, Punching, Cutting, Moulding
TechniqueWelded Austenitic Steel Cold drawn, Cold rolled, Hot rolled, Extrusion Tube
Tolerance
  • Outer Diameter: +/- 0.2mm
  • Thickness: +/- 10% OR as customer request
  • Length: +/- 10mm
Test Certificate
  • DFARS compliant
  • EN 10204/3.1B, EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
  • 100% Radiography Test Report
  • Raw Materials Certificate
  • Third Party Inspection Report
  • Fumigation Certificates
  • Heat Treatment Charts
  • HS Code Commercial Invoice
  • Form A for Generalized System of Preferences (GSP)
  • Manufacturer Test Certificate
  • Moisture testing
  • Surface roughness measurement
  • Laboratory Test Certificate from Govt. Approved Lab
PackagingPacked in PE Fabric Bundles or ply wooden box wrapped in plastic or Standard seaworthy export packing or as per customers’ request
SS 321 Welded Tubes Dimensions, 321 Stainless Steel Tube Suppliers, TP321 Welded Tubes, Stainless Steel 321 Welded Tubes
Nickel Molybdenum Chromium Iron Tungsten Cobalt Manganese Vanadium Silicon Phosphorus Sulfur Carbon
99.0% min. 0.25% max. 0.40% max. 0.35% max. 0.15% max. 0.35% max. 0.35% max. 0.35% max. 0.35% max. 0.35% max. 0.35% max. 0.01% max.
Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %
STANDARDWERKSTOFF NR.UNSJISBSGOSTAFNOREN
SS 3211.4301S30400SUS 304304S3108Х18Н10Z7CN18‐09X5CrNi18-10

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SS 321 Welded Tubing Dimensions

OD inches Ave. Wall inches D/t Ratio ID inches Tube Cross Sectional Area (in2) Internal Area (in2)
0.250 0.020 12.50 0.210 0.0145 0.0346
0.250 0.028 8.93 0.194 0.0195 0.0296
0.250 0.035 7.14 0.180 0.0236 0.0254
0.250 0.049 5.10 0.152 0.0309 0.0181
0.250 0.065 3.85 0.120 0.0378 0.0113
0.375 0.020 18.75 0.335 0.0223 0.0881
0.375 0.028 13.39 0.319 0.0305 0.0799
0.375 0.035 10.71 0.305 0.0374 0.0731
0.375 0.049 7.65 0.277 0.0502 0.0603
0.375 0.065 5.77 0.245 0.0633 0.0471
0.500 0.020 25.00 0.460 0.0302 0.1662
0.500 0.028 17.86 0.444 0.0415 0.1548
0.500 0.035 14.29 0.430 0.0511 0.1452
0.500 0.049 10.20 0.402 0.0694 0.1269
0.500 0.065 7.69 0.370 0.0888 0.1075
0.500 0.083 6.02 0.334 0.1087 0.0876
0.625 0.020 31.25 0.585 0.0380 0.2688
0.625 0.028 22.32 0.569 0.0525 0.2543
0.625 0.035 17.86 0.555 0.0649 0.2419
0.625 0.049 12.76 0.527 0.0887 0.2181
0.625 0.065 9.62 0.495 0.1144 0.1924
0.625 0.083 7.53 0.459 0.1413 0.1655
0.625 0.095 6.58 0.435 0.1582 0.1486
0.625 0.109 5.73 0.407 0.1767 0.1301
0.750 0.028 26.79 0.694 0.0635 0.3783
0.750 0.035 21.43 0.680 0.0786 0.3632
0.750 0.049 15.31 0.652 0.1079 0.3339
0.750 0.065 11.54 0.620 0.1399 0.3019
0.750 0.083 9.04 0.584 0.1739 0.2679
0.750 0.095 7.89 0.560 0.1955 0.2463
0.750 0.109 6.88 0.532 0.2195 0.2223
0.750 0.120 6.25 0.510 0.2375 0.2043
0.875 0.020 43.75 0.835 0.0537 0.5476
0.875 0.028 31.25 0.819 0.0745 0.5268
0.875 0.035 25.00 0.805 0.0924 0.5090
0.875 0.049 17.86 0.777 0.1272 0.4742
0.875 0.065 13.46 0.745 0.1654 0.4359
0.875 0.083 10.54 0.709 0.2065 0.3948
0.875 0.095 9.21 0.685 0.2328 0.3685
0.875 0.109 8.03 0.657 0.2623 0.3390
0.875 0.120 7.29 0.635 0.2846 0.3167
1.000 0.028 35.71 0.944 0.0855 0.6999
1.000 0.035 28.57 0.930 0.1061 0.6793
1.000 0.049 20.41 0.902 0.1464 0.6390
1.000 0.065 15.38 0.870 0.1909 0.5945
1.000 0.083 12.05 0.834 0.2391 0.5463
1.000 0.095 10.53 0.810 0.2701 0.5153
1.000 0.109 9.17 0.782 0.3051 0.4803
1.000 0.120 8.33 0.760 0.3318 0.4536
1.000 0.134 7.46 0.732 0.3646 0.4208
1.250 0.035 35.71 1.180 0.1336 1.0936
1.250 0.049 25.51 1.152 0.1849 1.0423
1.250 0.065 19.23 1.120 0.2420 0.9852
1.250 0.083 15.06 1.084 0.3043 0.9229
1.250 0.095 13.16 1.060 0.3447 0.8825
1.250 0.109 11.47 1.032 0.3907 0.8365
1.250 0.120 10.42 1.010 0.4260 0.8012
1.250 0.134 9.33 0.982 0.4698 0.7574
1.500 0.035 42.86 1.430 0.1611 1.6061
1.500 0.049 30.61 1.402 0.2234 1.5438
1.500 0.065 23.08 1.370 0.2930 1.4741
1.500 0.083 18.07 1.334 0.3695 1.3977
1.500 0.095 15.79 1.310 0.4193 1.3478
1.500 0.109 13.76 1.282 0.4763 1.2908
1.500 0.120 12.50 1.260 0.5202 1.2469
1.500 0.134 11.19 1.232 0.5750 1.1921
1.500 0.148 10.14 1.204 0.6286 1.1385
1.750 0.035 50.00 1.680 0.1886 2.2167
1.750 0.049 40.82 1.902 0.3003 2.8413
1.750 0.065 26.92 1.620 0.3441 2.0612
1.750 0.083 21.08 1.584 0.4347 1.9706
1.750 0.095 18.42 1.560 0.4939 1.9113
1.750 0.109 16.06 1.532 0.5619 1.8433
1.750 0.120 14.58 1.510 0.6145 1.7908
1.750 0.134 13.06 1.482 0.6803 1.7250
1.750 0.148 11.82 1.454 0.7449 1.6604
1.750 0.165 10.61 1.420 0.8216 1.5837
2.000 0.035 57.14 1.930 0.2161 2.9255
2.000 0.049 40.82 1.902 0.3003 2.8413
2.000 0.065 30.77 1.870 0.3951 2.7465
2.000 0.083 24.10 1.834 0.4999 2.6417
2.000 0.095 21.05 1.810 0.5685 2.5730
2.000 0.109 18.35 1.782 0.6475 2.4941
2.000 0.120 16.67 1.760 0.7087 2.4328
2.000 0.134 14.93 1.732 0.7855 2.3561
2.000 0.148 13.51 1.704 0.8611 2.2805
2.000 0.165 12.12 1.670 0.9512 2.1904

SS 321 Welded Tubing Weight Chart

Diameter Outside- A x material- thickness t (mm) Weight kg/meter Diameter Outside- A x thickness- stärke t (mm) Weight kg/meter
12×2 0,51 57×3 4,11
17×1,5 0,77 63,5×2 2,36
17×2 0,93 70×1,5 2,61
18×1 0,43 70×2 3,45
18×1,5 0,63 70×3 5,11
18×2 0,81 75×2 3,71
20×1 0,48 76,1×1,6 3,03
20×1,5 0,70 76,1×2 3,76
20×2 0,91 76,1×2,6 4,85
14×1 0,33 60,3×2 2,96
14×1,5 0,48 60,3×2,6 3,81
15×1 0,36 60,3×2,9 4,23
15×1,5 0,51 60,3×3 4,37
15×2 0,66 60,3×3,3 4,71
16×1 0,38 60,3×3,6 5,18
16×1,5 0,55 60,3×4 5,72
16×2 0,71 60,3×5 7,02
17×1 0,60 63,5×1,5 2,36
10×1 0,23 54×2 2,64
10×1,5 0,32 55×2 2,69
12×1 0,28 57×1,5 2,11
20×3 1,30 76,1×3 5,39
21,3×1 0,80 76,1×3,7 6,72
21,3×1,5 0,98 80×1,5 2,99
21,3×2,6 1,23 80×2 3,96
22×1 0,53 80×3 5,87
6×1 0,13 53×1,5 1,96
8×1 0,18 54×1,5 2,00
13×1 0,30 60,3×1 1,51
13×1,5 0,44 60,3×1,5 2,24
12×1,5 0,40 57×2 2,79
22×1,5 0,78 80×4 7,72
23×2 1,07 84×2 4,17
24×1 0,86 85×2 4,22
24×1,5 0,58 88,9×2 4,41
25×1 0,61 88,9×2,6 5,70
25×1,5 0,90 88,9×3 6,55
25×2 1,17 88,9×3,1 6,65
25×2,5 1,43 88,9×4 8,63

SS 321 Welded Tubing Packing & Marking

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Marking Details and packaging

To ensure damage-free transportation, ASTM A249 Stainless Steel 321 Welded Tubes are packed in wooden cases, plastic wrapping and bundles with proper end caps. Each tube is marked with grade, size, heat number and standards for complete traceability. We guarantee timely delivery to meet customer requirements efficiently.

Certifications

Our SS 321 welded tubing undergoes hydrostatic testing, PMI testing, ultrasonic testing and mechanical property analysis to ensure top-notch quality. We provide Mill Test Certificates (MTC), EN 10204 3.1/3.2 certification and third-party inspection reports for quality assurance.

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Industrial Application of SS 321 Welded Tubing

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