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321 stainless steel tube

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What is 321 stainless steel tube?

The 321 Stainless Steel Tube has similar properties to other grades of stainless steel but contains a higher level of carbon and titanium in the chemical composition. The ASTM A213 TP321 material offers outstanding resistance to oxidation and corrosion. They are known for possessing high toughness that goes down till cryogenic temperature.

The SA213 TP321 material also possesses good forming and welding capabilities. They show good performance up to the temperature of 900 degrees C. They do not have aesthetic appeal, and thus, they do not have any decorative usages. 321 grade steel is mostly used in high temperature applications like exhaust manifolds, aerospace, etc.

IOL approved ASTM A213 TP321 material and SS 321 seamless tube supplier in India

321 stainless steel tube manufacturer in India

321 seamless tube vs dom

The 321 Stainless Steel Pipe material is made of austenitic alloy, that has been stabilized with the help of titanium. The 321 Seamless Tubes is manufactured from a solid round billet, which is heated to form a hollow tube. They do not have any welding seams, and hence offer strong and leakage free connections.

The DOM (Drawn Over Mandrel) mechanical UNS S32100 Round Tubes is cold drawn and they are electric resistance welded tubes. All of their flash are removed prior to the cold drawing process. This process produces more exact OD and ID tolerances, compared to the traditional electrically welded tubing solutions.

Largest Manufacturer of 321 SS tube in Gujarat. Buy Quality 1.4541 tubes in best prices

321 stainless steel tube

321 stainless steel tube

ASTM A213 TP321 condenser tubes

ASTM A213 TP321 condenser tubes

SA213 TP321 material

SA213 TP321 material

Why mill test certificate required with sA213 TP321 material?

The mill test certificates are issued by 321 SS Tube suppliers and manufacturers. It helps to certify the mechanical and chemical features of the given AISI 321 Heat Exchanger Tubes follow the technical specifications and norms. Typically, the mill test certificates help to confirm the EN 10204 standard and are related to various steel products. The certificate issued by the concerned manufacturers consist of:

  • Dimensional measurements that helps to check compliance with the allowed tolerance.
  • The material grade and all applicable specifications.
  • The results of any additional tests, like hardness, hydrostatic, impact test, etc.

SS 321 Tube supplier in Gujarat, We stock large diameter 321 stainless steel exhaust tubing, ranging from an outside diameter of 2mm to 20mm

Table of Contents


321 stainless steel tube manufacturer

321 stainless steel tube specifications

Specification Application Thickness
  • AMS5557
  • AMS5570
  • MILT8808
  • ASTMA213
  • ASTMA269
  • ASTMA312
  • Engine manifolds
  • Expansion joints
  • Oil refinery equipment
  • Exhaust stacks
0.25mm-3.0mm
Outer diameter Type External Coating
6.35-219mm Seamless / ERW / Welded / Capillary Tubes 3LPE / 3LPP/ FBE/ DFBE/ PP
Documentation  Packaging  Testing 
  • Test Certificates certifying NACE MR0103 NACE MR0175,
  • Letter of Gurantee
  • Raw Material Test Reports
  • Heat Treatment Charts
  • Material Test Certificates as per EN 10204 3.1, EN 10204 3.2
  • Fumigation Certificates
  • Wooden Crates
  • Shrink-wrapped
  • Wooden Boxes
  • Carton boxes
  • Wooden Pallets
  • Eddy Current Testing
  • Hydrostatic Test
  • Ultra Sonic Test (UT)
  • Flaring Test
  • Micro Test
  • Flattening Test
  • Chemical Analysis
Stockist of SA213 TP321 material and AISI 321 stainless tubing with tensile test and charpy impact test

321 SS tube types

321 stainless steel pipe

321 stainless steel pipe

321 seamless tube

321 seamless tube

321 SS tube

321 SS tube

321 stainless steel exhaust tubing

321 stainless steel exhaust tubing

321 welded tube

321 welded tube

1.4541 tubes

1.4541 tubes

321 stainless tubing

321 stainless tubing

UNS S32100 round tubes

UNS S32100 round tubes

AISI 321 heat exchanger tubes

AISI 321 heat exchanger tubes

If you require UNS S32100 round tube and 321 stainless steel pipe in large orders, get in touch with us to get a quote

ASTM A213 TP321 condenser tubes chemical composition

Grade Mn C Si P Ti S N Cr Ni
SS 321 2.0 max 0.08 max 1.0 max 0.045 max 5(C+N) - 0.70 max 0.030 max 0.10 max 17.00 - 19.00 9.00 - 12.00

SA213 TP321 material mechanical properties

Density Tensile Strength Melting Point Elongation Yield Strength (0.2%Offset)
8.0 g/cm3 Psi - 75000 , MPa - 515 1457 °C (2650 °F) 35 % Psi - 30000 , MPa - 205

Equivalent of 321 stainless steel pipe

STANDARD UNS WERKSTOFF NR. JIS EN
SS 321 S32100 1.4541 SUS 321 X6CrNiTi18-10

1.4541 tubes physical properties

Grade Elastic Modulus (GPa) Density (kg/m3) Mean Coefficient of Thermal Expansion (m/m/0C) Specific Heat 0-1000C (J/kg.K) Thermal Conductivity (W/m.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
321 193 8027 16.6 17.2 18.6 500 16.1 22.2 720

321 stainless tubing weight chart

Outside Dia Size Schedule 5 S Schedule 20 S Schedule 10 S Schedule 40 S Schedule 80 S XXS Schedule 160 S
milimeter milimeter inch Wall Thickness in milimeter WEIGHT (KGM) Wall Thickness in milimeter WEIGHT in Kg Wall Thickness in milimeter WEIGHT in Kg Wall Thickness in milimeter WEIGHT in Kg Wall Thickness in milimeter WEIGHT in Kg Wall Thickness in milimeter WEIGHT in Kg Wall Thickness in milimeter WEIGHT in Kg
10.3 3 1/8 1.2 0.20 1.5 0.33 1.24 0.28 1.73 0.37 2.41 0.47
13.7 6 1/4 1.2 0.37 2.00 0.58 1.65 0.49 2.24 0.630 3.02 0.80
17.1 10 3/8 1.2 0.47 2.00 0.74 1.65 0.63 2.31 0.840 3.20 1.10
21.3 15 1/2 1.65 0.80 2.30 1.07 2.11 1.00 2.77 1.27 3.73 1.62 7.47 2.55 4.75 1.94
26.7 20 3/4 1.65 1.03 2.55 1.52 2.11 1.28 2.87 1.69 3.91 2.20 7.82 3.64 5.56 2.90
33.4 25 1 1.65 1.30 2.55 1.94 2.77 2.09 3.38 2.50 4.55 3.24 9.09 5.45 6.35 4.24
42.2 32 1.1/4 1.65 1.65 3.00 2.90 2.77 2.70 3.56 3.39 4.85 4.47 9.70 7.77 6.35 5.61
48.3 40 1.1/2 1.65 1.91 3.00 3.55 2.77 3.11 3.68 4.05 5.08 5.41 11.1 10.18 7.14 7.25
60.3 50 2 1.65 2.40 3.00 4.24 2.77 3.93 3.91 5.44 5.54 7.48 11.07 13.44 8.74 11.11
73.0 65 2.1/2 2.11 3.69 4.00 6.81 3.05 5.26 5.16 8.63 7.01 11.41 14.02 20.39 9.53 14.91
88.9 80 3 2.11 4.51 4.00 8.37 3.05 6.45 5.49 11.29 7.62 15.27 15.24 27.68 11.1 21.30
114.3 100 4 2.11 5.84 4.50 12.18 3.05 8.36 6.02 16.07 8.56 22.32 17.12 41.03 13.49 33.54
141.3 125 5 2.77 9.47 5.00 16.80 3.40 11.57 6.55 21.8 9.53 30.97 19.05 57.43 15.88 49.11
168.3 150 6 2.77 11.32 6.35 25.36 3.40 13.84 7.11 28.26 10.97 42.56 21.95 79.22 18.25 67.53
219.1 200 8 2.77 14.79 6.35 33.31 3.76 19.96 8.18 42.55 12.7 64.64 22.23 107.92 23.01 111.27
273.1 250 10 3.40 22.63 6.35 41.77 4.19 27.78 9.27 60.31 12.7 96.01 25.40 155.15 28.58 172.33
323.8 300 12 3.96 31.25 6.35 49.7 4.57 36.00 9.53 73.88 12.7 132.05 25.40 186.97 33.32 238.76
355.6 350 14 3.96 34.36 7.92 67.80 4.78 41.3 11.13 94.59
406.4 400 16 4.19 41.56 7.92 77.83 4.78 47.29 12.7 123.30
457.2 450 18 4.19 46.81 7.92 87.71 4.78 53.26 14.27 155.80
508.0 500 20 4.78 59.25 9.53 117.14 5.54 68.61 15.09 183.42
610.0s 600 24 5.54s 82.47 9.53 141.12 6.35 94.45 17.48 255.41

Temperature range of UNS S32100 round tubes

Properties (MPa) Temperature Range
600 °C 700 °C 800°C
Creep resistance Rz/1000 200 88 30
Rz/10000 142 48 15
Rz/100000 65 22 10
Creep limit R1/1000 110 45 15
R1/10000 85 30 10

AISI 321 heat exchanger tubes sizes

Size Ouer Dia, Inches BW Ga. ID Wall Dec-In. Weight Lbs/Ft.
1/2 25 0.460 0.020 0.1025
20 0.430 0.035 0.1738
18 0.402 0.049 0.2360
16 0.370 0.065 0.3020
5/8 20 0.555 0.035 0.2205
18 0.527 0.049 0.3014
16 0.495 0.065 0.3888
3/4 20 0.680 0.035 0.2673
18 0.652 0.049 0.3668
16 0.620 0.065 0.4755
14 0.584 0.083 0.5913
7/8 18 0.777 0.049 0.4323
16 0.745 0.065 0.5623
11 0.635 0.120 0.9676
1/8 22 0.069 0.028 0.0290
20 0.055 0.035 0.0336
3/16 22 0.131 0.028 0.0478
1/4 25 0.210 0.020 0.0491
22 0.194 0.028 0.0664
21 0.187 0.032 0.0745
20 0.180 0.035 0.0804
18 0.152 0.049 0.1052
16 0.120 0.065 0.1284
5/16 20 0.242 0.035 0.1039
18 0.214 0.049 0.1382
16 0.182 0.065 0.1722
3/8 22 0.319 0.028 0.1038
20 0.305 0.035 0.1271
18 0.277 0.049 0.1706
16 0.245 0.065 0.2152
7/16 18 0.340 0.049 0.2036
1 20 0.930 0.035 0.3607
18 0.902 0.049 0.4977
16 0.870 0.065 0.6491
14 0.834 0.083 0.8129
11 0.760 0.120 1.1278
1-1/4 11 1.010 0.120 1.4480

321 seamless tube dimensions

Outer Dia inches D/t Ratio Ave. Wall inches Inner Dia inches Internal Area (inch2) Tubes Cross Sectional Area (inch2)
0.625 17.86 0.035 0.555 0.2419 0.0649
0.625 12.76 0.049 0.527 0.2181 0.0887
0.625 9.62 0.065 0.495 0.1924 0.1144
0.625 7.53 0.083 0.459 0.1655 0.1413
0.625 6.58 0.095 0.435 0.1486 0.1582
0.625 5.73 0.109 0.407 0.1301 0.1767
0.750 26.79 0.028 0.694 0.3783 0.0635
0.750 21.43 0.035 0.680 0.3632 0.0786
0.750 15.31 0.049 0.652 0.3339 0.1079
0.750 11.54 0.065 0.620 0.3019 0.1399
0.750 9.04 0.083 0.584 0.2679 0.1739
0.750 7.89 0.095 0.560 0.2463 0.1955
0.750 6.88 0.109 0.532 0.2223 0.2195
0.750 6.25 0.120 0.510 0.2043 0.2375
0.875 43.75 0.020 0.835 0.5476 0.0537
0.875 31.25 0.028 0.819 0.5268 0.0745
0.875 25.00 0.035 0.805 0.5090 0.0924
0.875 17.86 0.049 0.777 0.4742 0.1272
0.250 12.50 0.020 0.210 0.0346 0.0145
0.250 8.93 0.028 0.194 0.0296 0.0195
0.250 7.14 0.035 0.180 0.0254 0.0236
0.250 5.10 0.049 0.152 0.0181 0.0309
0.250 3.85 0.065 0.120 0.0113 0.0378
0.375 18.75 0.020 0.335 0.0881 0.0223
0.375 13.39 0.028 0.319 0.0799 0.0305
0.375 10.71 0.035 0.305 0.0731 0.0374
0.375 7.65 0.049 0.277 0.0603 0.0502
0.375 5.77 0.065 0.245 0.0471 0.0633
0.500 25.00 0.020 0.460 0.1662 0.0302
0.500 17.86 0.028 0.444 0.1548 0.0415
0.500 14.29 0.035 0.430 0.1452 0.0511
0.500 10.20 0.049 0.402 0.1269 0.0694
0.500 7.69 0.065 0.370 0.1075 0.0888
0.500 6.02 0.083 0.334 0.0876 0.1087
0.625 31.25 0.020 0.585 0.2688 0.0380
0.625 22.32 0.028 0.569 0.2543 0.0525
0.875 13.46 0.065 0.745 0.4359 0.1654
0.875 10.54 0.083 0.709 0.3948 0.2065
0.875 9.21 0.095 0.685 0.3685 0.2328
0.875 8.03 0.109 0.657 0.3390 0.2623
0.875 7.29 0.120 0.635 0.3167 0.2846
1.000 35.71 0.028 0.944 0.6999 0.0855
1.000 28.57 0.035 0.930 0.6793 0.1061
1.000 20.41 0.049 0.902 0.6390 0.1464
1.000 15.38 0.065 0.870 0.5945 0.1909
1.000 12.05 0.083 0.834 0.5463 0.2391
1.000 10.53 0.095 0.810 0.5153 0.2701
1.000 9.17 0.109 0.782 0.4803 0.3051
1.000 8.33 0.120 0.760 0.4536 0.3318
1.000 7.46 0.134 0.732 0.4208 0.3646
1.250 35.71 0.035 1.180 1.0936 0.1336
1.250 25.51 0.049 1.152 1.0423 0.1849
1.250 19.23 0.065 1.120 0.9852 0.2420
1.250 15.06 0.083 1.084 0.9229 0.3043
1.250 13.16 0.095 1.060 0.8825 0.3447
1.250 11.47 0.109 1.032 0.8365 0.3907
1.250 10.42 0.120 1.010 0.8012 0.4260
1.250 9.33 0.134 0.982 0.7574 0.4698
1.500 42.86 0.035 1.430 1.6061 0.1611
1.500 30.61 0.049 1.402 1.5438 0.2234
1.500 23.08 0.065 1.370 1.4741 0.2930
1.500 18.07 0.083 1.334 1.3977 0.3695
1.500 15.79 0.095 1.310 1.3478 0.4193
1.500 13.76 0.109 1.282 1.2908 0.4763
1.500 12.50 0.120 1.260 1.2469 0.5202
1.500 11.19 0.134 1.232 1.1921 0.5750
1.500 10.14 0.148 1.204 1.1385 0.6286
1.750 50.00 0.035 1.680 2.2167 0.1886
1.750 40.82 0.049 1.902 2.8413 0.3003
1.750 26.92 0.065 1.620 2.0612 0.3441
1.750 21.08 0.083 1.584 1.9706 0.4347
1.750 18.42 0.095 1.560 1.9113 0.4939
1.750 16.06 0.109 1.532 1.8433 0.5619
1.750 14.58 0.120 1.510 1.7908 0.6145
1.750 13.06 0.134 1.482 1.7250 0.6803
1.750 11.82 0.148 1.454 1.6604 0.7449
1.750 10.61 0.165 1.420 1.5837 0.8216
2.000 57.14 0.035 1.930 2.9255 0.2161
2.000 40.82 0.049 1.902 2.8413 0.3003
2.000 30.77 0.065 1.870 2.7465 0.3951
2.000 24.10 0.083 1.834 2.6417 0.4999
2.000 21.05 0.095 1.810 2.5730 0.5685
2.000 18.35 0.109 1.782 2.4941 0.6475
2.000 16.67 0.120 1.760 2.4328 0.7087
2.000 14.93 0.134 1.732 2.3561 0.7855
2.000 13.51 0.148 1.704 2.2805 0.8611
2.000 12.12 0.165 1.670 2.1904 0.9512

321 stainless steel exhaust tubing tolerance chart

OD milimeter Tolerances OD, milimeter   Wall thickness %
<6-4.76 +/-0.10/-0 +/-10
<4.76-2.38 +0.08/-0 +/-10
<2.38 +0.05/-0 +/-10