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Stainless Steel 321 Tube

The austenitic grade stainless steel used in the 321 Stainless Steel Tube. It has similar qualities to 304 grade stainless steel, but its chemical makeup has a higher proportion of carbon and titanium. The ASTM A213 TP321 material is very resistant to oxidation and corrosion. They are recognised for having exceptional durability that can withstand cryogenic temperatures. The SA213 TP321 material is also capable of forming and welding.

They function well up to temperatures of 900 degrees Celsius. They lack aesthetic appeal and consequently have no decorative applications.

ASTM A213 Type 321 Seamless Tube and ASME SA213 TP321 ERW Tubes can withstand significant mechanical stress and pressure.

The 321 Stainless Steel Pipe is comprised of an austenitic alloy that has been titanium stabilised. The 321 Seamless Tube is made of a solid round billet that has been heated to form a hollow tube. They have no welding seams and hence provide sturdy, leak-free connections. The mechanical UNS S32100 Round Tube DOM (Drawn Over Mandrel) is cold drawn and electric resistance welded. Prior to the cold sketching technique, they eliminate all of their flash. When compared to standard electrically welded tubing solutions, this method produces more precise OD and ID tolerances.

321 SS Tube suppliers and manufacturers give mill test certificates. It aids in ensuring that the mechanical and chemical properties of the offered AISI 321 Heat Exchanger Tubes meet technical criteria and norms. Typically, mill test certificates aid in conforming to the EN 10204 standard and are associated with specific steel products.

Table of content

Specification of Stainless steel 321 Tube

Specification ASTM A213/ ASME SA213
Surfaces
  • Average roughness value: Ra < 0.8 µm
  • Weld seam area: Ra < 1.6 µm
Standard length 6 metres
Delivery Condition MF, Bright Annealed, Polished, Annealed and Pickled, Cold Drawn
Thickness Range Schedule 5 to Schedule XXS
Manufacturing Type CEW / Seamless / DOM / ERW / Fabricated / Welded / CDW / CDS / 100% X Ray Welded
Surface Finish BA, 500G, 2B, No.1, No.3, No.8, 800G Mirror finish, 8K, HL, No.4, 2D, Mirror Polished, 1D, 180G, 400G Satin/ Hairline, 320G, 400G, 600G
Value Added Services
  • Cutting
  • Destructive and Non Destructive
  • Threading
  • Polishing (Electro & Commercial)
  • Draw & Expansion as per required Size & Length
  • Annealed & Pickled Bending
  • Beveling
  • Ultrasonic Testing
END Plain End, Beveled End, Treaded Tubes
Processing Service Welding, Decoiling, Bending, Punching, Cutting, Moulding
Technique Cold drawn, Cold rolled, Hot rolled, Extrusion Tubes
Tolerance
  • Outer Diameter: +/- 0.2mm
  • Thickness: +/- 10% OR as customer request
  • Length: +/- 10mm

UNS S32100 Round Tube Size chart

Wall Thickness Sizes ( O.D.)
.010 1/16″ , 1/8″ , 3/16″
.020 1/16″ , 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″
.012 1/8″
.016 1/8″ , 3/16″
.028 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ , 1/2″ , 3/4″ , 1″ , 1 1/2″ , 2″
.035 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ , 7/16″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 2″ , 2 1/4″
.049 3/16″ , 1/4″ , 5/16″ , 3/8″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/8″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 2″ , 2 1/4″
.065 1/4″ , 5/16″ , 3/8″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 1 3/4″ , 2″ , 2 1/2″ , 3″
.083 1/4″ , 3/8″ , 1/2″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 1 7/8″ , 2″ , 2 1/2″ ,3″
.095 1/2″ , 5/8″ , 1″ , 1 1/4″ , 1 1/2″ , 2″
.109 1/2″ , 3/4″ , 1″ , 1 1/4″ , 1 1/2″ , 2″
.120 1/2″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ , 2 1/4″ , 2 1/2″ , 3″
.125 3/4″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ , 3″ , 3 1/4″
.134 1″
.250 3″
.375 3 1/2″

321 SS Welded Tube chemical composition

Grade C Mn Si P S Cr N Ni Ti
SS 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
SS 321H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 19.00 0.10 max 9.00 – 12.00 4(C+N) – 0.70 max

AISI 321 Welded Tube and 321 SS Square Tube exhibits thickness variations spanning from Schedule 5 to Schedule XXS.

DIN 1.4541 Square Tube 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 %

Alloy 321 Rectangular Tube equivalent grade

STANDARD WERKSTOFF NR. UNS JIS EN
SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H X12CrNiTi18-9
Purchase cut to size DIN 1.4541 Extruded Seamless Tube and UNS S32100 Round Tube online with the most recent price list

Processing of AISI 321 Polished Tube

  • Structural Cutting
  • Tubular Cutting
  • Production Cutting
  • Structural Polishing

Various types of ASME SA 213 TP 321 Tube

ASTM A213 Type 321 Seamless Tube

ASTM A213 Type 321 Seamless Tube

ASME SA213 TP321 ERW Tubes

ASME SA213 TP321 ERW Tubes

AISI 321 Welded Tube

AISI 321 Welded Tube

321 SS Square Tube

321 SS Square Tube

DIN 1.4541 Extruded Seamless Tube

DIN 1.4541 Extruded Seamless Tube

UNS S32100 Round Tube

UNS S32100 Round Tube

SS 321 Heat Exchanger Tube value added services

  • Ultrasonic Testing
  • 100% X-Ray Welding
  • Beveling
  • Cold Drawing Services
  • Polishing
We keep stock of 321 Stainless Steel Exhaust Tubing and SS 321 Seamless Tubing in many standards and finishes

321 stainless steel tube stock list

ASME SA249 TP 321 Tubing Stainless Steel 321 Fabricated Tube
UNS S32100 12mm Tube ASME SA249 TP 321 Seamless Tubing
321H Stainless Steel High Pressure Tube ASTM A249 TP 321H Thin Wall Tubing
Stainless Steel 1.4541 Electropolished Tubes ASME SA249 TP 321 Cold Drawn Seamless Tube
Stainless Steel 321 Hydraulic Tubing ASTM A249 TP 321H Coiled Tube
321 SS ERW Tube 321H Stainless Steel Electropolished Tube
UNS S32100 Rectangular Tubing Stainless Steel 1.4541 CDW Tube
ASME SA249 TP 321 Electropolish Tube SS A249 TP321H Capillary Tubing
321H Stainless Steel Small Diameter Tubing 321 SS ERW Tubing

ASTM A213 TP321 Tube weight chart

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 0.1213
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 0.316L7
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 0.316L3 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

Application of 321 SS tube

  • Pharmaceutical equipment
  • Petrochemical industry
  • Chemical processing
  • Beverage industry
  • Food processing equipment

Packaging of AISI 321 Welded Tube

Keep fragile items protected by encasing them in plastic or paper sleeves within bundles. Opt for wooden crates to protect and preserve your goods during long-distance shipping. Cardboard boxes offer cost-effective and recyclable packaging solutions for various items.

Frequently asked questions

Are 321 Stainless Steel Tubing easy to bend and shape?

321 Stainless Steel Tubing can be easily bent and shaped using appropriate tools and techniques.

Are ASTM A213 Type 321 Seamless Tube suitable for pharmaceutical industry applications?

Yes, ASTM A213 Type 321 Seamless Tube are suitable for pharmaceutical industry applications due to their corrosion resistance and hygienic properties.

Can ASME SA213 TP321 ERW Tubes be used in cryogenic environments?

Yes, ASME SA213 TP321 ERW Tubes can be used in cryogenic environments, as they retain their strength and toughness at low temperatures.

What is the tensile strength of AISI 321 Welded Tube?

The tensile strength of AISI 321 Welded Tube typically ranges from 515 to 730 MPa (74,770 to 105,985 psi), depending on the manufacturing and heat treatment processes.

Are 321 SS Square Tube readily available in the market?

Yes, 321 SS Square Tube are readily available in the market from various suppliers and distributors.

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