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What is Stainless Steel Seamless Tube?

A SS seamless tube is a hollow cylindrical pipe without any welded joints. It is produced through cold drawing or cold rolling procedures. Herein, a solid stainless steel billet is pushed through a die to form the desired tube shape. The seamless nature of the tube reduces the risk of leaks and enhances its strength.

SS seamless tubes manufacturer in India

Stainless steel tubes manufacturer in India

What is Cold Drawn SS Seamless Tube?

Stainless Steel Tubes Manufacturer In India produces a high precision hollow cylindrical pipe called cold drawn ss seamless tube. The manufacturing process involves drawing the tube through a die, which reduces its diameter and thickness. This procedure results in a seamless and smooth surface finish.

SS Cold drawn tubes have great dimensional accuracy, excellent surface quality and improved mechanical properties than hot rolled tubes. Thus, they are used in critical applications like automotive components, hydraulic systems, etc.

Tubotech Stainless Inc is a well-known SS seamless tubing and Hot Finished Stainless Steel Tubing supplier in Gujarat

Stainless steel seamless tubes

Stainless steel seamless tubes

Stainless steel tubing

Stainless steel tubing

SS seamless tubing

SS seamless tubing

Cold vs Hot Finished Stainless Steel Tubing

  • Stainless Steel Tube Manufacturers produce cold finished tubes by drawing the stainless steel through a die at room temperature. Hot-finished tubing is produced by heating the stainless steel billet to high temperatures and then passing it through rolling mills.
  • The cold drawn process enhances the mechanical properties of the stainless steel. Thus, cold finished ss tubes have higher strength & hardness than the hot finished ones.
  • Stainless steel CF tubes have a smoother and more consistent surface finish. HF tubes may have a rougher surface.
  • SS CF tubes are used in more critical applications than HF ones.

We have a wide range of Stainless Steel Welded Tube and SS CDS Tubing available with outside diameter ranging from 12.7mm to 254mm

Table of Contents


Stainless steel seamless tubes manufacturer

Stainless steel tube specifications

Stainless steel tube diametersStainless steel tube lengthsStainless steel tube finishes
  • Round: 16mm to 80mm
  • Square: 15mmx15mm to 60mmx60mm
  • Rectangular: 20mmx10mm to 80mmx40mm
6m
  • Mill finish
  • Satin finish
  • Brushed
  • Polished finish
Stainless tube roughnessASTM StandardsTesting
0.015 ε in mm
  • ASME SA213/ ASTM A213
  • ASTM A249/ ASME SA249
  • ASTM A269/ ASME SA269
  • Flaring test
  • Micro test
  • Mechanical test
  • Chemical test
  • Macro test
  • Flattening test
SS tube thicknessAllowable working stressTemperature Range
0.3 mm to 4mm20,000 psi-29C to +38C
Stainless steel tube yield strengthStainless steel tubing gradesStainless steel tube od tolerance
Psi – 30000304, 304L,316, 316L, 321, 317L, 347, 904L 
Stainless Steel Tube manufacturer in India, Check 1 inch SS Exhaust Tubing suitable for vacuums, high pressures, pressure and impulsing surge applications

Types of SS tubes

SS tube

SS tube

Stainless steel tubes

Stainless steel tubes

SS tubing

SS tubing

Stainless steel round tube

Stainless steel round tube

SS square tubing

SS square tubing

Stainless steel round tube welded tube

Stainless steel round tube welded tube

Suppliers of SS tubes and Stainless Steel Square Tubing with Ultrasonic NDT Testing

Stainless steel tubing sizes

Outer Dia Weight per Wall Outer Dia Weight per Wall
(inches) metre (kilogram) (milimeter) (inches) metre (kilogram) (milimeter)
1/2 0.42 1.50 1 1/4 1.13 1.50
5/8 0.44 1.20 1 3/8 1.02 1.20
5/8 0.54 1.50 1 1/2 1.11 1.20
3/4 0.53 1.20 1 1/2 1.38 1.50
3/4 0.66 1.50 1 1/2 1.81 2.00
3/4 0.63 1.20 1 3/4 1.62 1.50
7/8 0.78 1.50 2 1.49 1.20
7/8 1.01 2.00 2 1.85 1.50
1 0.73 1.20 2 2.40 2.00
1 0.90 1.50 2 1/2 2.34 1.50
1 1.17 2.00 3 2.81 1.50
1 1/8 1.02 1.50 4 7.41 3.00
1 1/4 0.92 1.20

Stainless steel tubes weight chart

Outer Dia in Inches25ga .020"28ga .010"22ga .028"18ga .049"20ga .035"16ga .065"14ga .083"12ga 0.109"13ga .095"11ga .120"9ga .148"10ga .134"
1/164800024000
0.00920.0057
1 /824000336005880042000
0.02240.0290.03980.0336
3/1 616000224003920028000
0.03690.04780.07270.0572
1 /41200016800294002100039000
0.04910.06640.01520.08040.1284
5/1 6960013440235201680031200
0.06260.08520.13820.10390.1722
3/880001120019600140002600033200
0.07580.10380.17060.12710.21520.2588
7/1 66857960016800120002228528457
0.08930.12260.20360.15060.25890.3147
1 /2600084001470010500195002490028500
0.10250.14110.2360.17380.3020.36960.4109
5/848006725117508400156001992522800
0.12920.17850.30140.22050.38880.48050.5377
3/440005600980070001300016600218001900024000
0.15590.21590.36680.26730.47550.59130.74620.66460.8074
7/834254800840060001115014250186751627520570
0.18260.25330.43230.3140.56230.70210.89170.79140.9676
130004200735052509750124501635014250180002220020100
0.20930.29070.49770.36070.64910.81291.0370.91821.1281.3471.251
1 -1 /4335058754200780099501307511400144001775016075
0.36540.62850.45420.82261.0341.3281.1721.4481.7421.612
1 -3/8305053503825710090501190010350131001615014625
0.40280.69390.50090.90941.1451.4741.2991.6081.9391.793
1 -1 /228004900350065008300109009500120001480013400
0.44020.75930.54760.99621.2561.6191.4261.7692.1571.973
1 -5/825754525322560007650100508775110751365012375
0.47760.82480.59431.0831.3671.7661.5521.9292.3562.154
1 -3/42400420030005575712593508150102751267511475
0.51490.89020.64111.171.4781.911.6792.0892.5562.334
1 -7/839252800520066508725760096001185010725
0.95560.68781.2571.5892.0561.8062.2492.732.492
236752625487562258175712590001110010050
1.0210.73451.3431.6992.2011.9332.4092.9552.695
324503250415054504750600074006700
1.5442.0372.5863.3652.9473.6914.554.14
418252425310040904075450055505025
2.0682.7323.4724.533.9624.9736.1465.585

Seamless stainless steel tubing pressure rating

Outer DiaWall Thickness (inches)
(inches)0.0180.0240.0200.0280.0350.0470.0630.059.1260.0790.098
3/163726.55118.54176.06104.58207.011745.0
1/42726.03726.53059.54408.05858.08207.011730.510802.5
9/322407.03277.02697.03871.55118.57134.010106.59338.0
5/162146.02914.52407.03451.04553.06307.58859.58192.511730.5
3/81783.52407.01986.52842.03726.55118.57134.06612.09338.0
1/21319.51783.51464.52088.02726.03726.55118.54756.06612.0
5/81406.51160.01653.02146.02914.53987.53712.05118.56612.0
3/41174.5971.51363.01783.52407.03277.03059.54176.05365.0
7/81000.5826.51174.51508.02044.52769.52581.03523.54509.5
1870.0725.01015.01319.51783.52407.02247.55118.53059.53886.0
1¼696.0812.01044.01406.51899.51783.53987.52407.03059.5
1½667.0870.01174.51566.01464.53277.01986.52508.5
1¾580.0739.51000.51334.01247.02769.51682.02131.5
2652.5870.01174.51087.52407.01464.51856.0
2½522.0696.0928.0870.01899.51174.51464.5
3580.0768.5725.01566.0971.51218.0
3½493.0652.5623.51334.0826.51044.0
4435.0580.0536.51174.5725.0913.5
5464.0435.0928.0580.0725.0
6377.0362.5768.5478.5594.5
8290.0261.0580.0362.5449.5
10232.0217.5464.0290.0362.5

SS tube hsn code

Stainless steel 730411

SS tubing wall thickness

TUBE OUTER DIA (INCHES)WALL THICKNESS (INCHES)TUBE OUTER DIA (MILIMETER)BWGWALL THICKNESS (MILIMETER)
0.1880.0354.78200.89
0.2500.0206.350.51
0.028220.71
0.035200.89
0.049181.25
0.065161.65
0.3130.0357.95200.89
0.049181.25
0.3750.0289.53220.71
0.035200.89
0.049181.25
0.065161.65
0.5000.03512.7200.89
0.049181.25
0.650161.65
0.6250.03515.88200.89
0.049181.25
0.065161.65
0.7500.03519.05200.89
0.049181.25
0.065161.65
0.083142.11
0.120113.05
0.8750.03522.23200.89
0.049181.25
0.065161.65
0.120113.05
1.0000.03525.4200.89
0.049181.25
0.065161.65
0.083142.11
0.095132.41
0.120113.05
1.1250.06528.58161.65
1.2500.06531.75161.65
0.083142.11
0.120113.05
1.3750.03534.93200.89
1.50000.04938.1181.25
0.065161.65
0.083142.11
0.120113.05
1.7500.03544.45200.89
0.065161.65
0.083142.11
1.8750.06547.63161.65
2.0000.04950.8181.25
0.065161.65
0.083142.11
0.120113.05
2.1250.06553.98161.65
2.2500.06557.15161.65
0.083142.11
0.120113.05
2.5000.06563.5161.65
0.083142.11
0.120113.05
2.7500.06569.85161.65
3.0000.04976.2181.25
0.065161.65
0.083142.11
0.120113.05
3.2500.06582.55161.65
0.120113.05
3.5000.06588.9161.65
4.0000.065101.6161.65
0.083142.11
4.2500.120108113.05
4.5000.065114.3161.65
5.0000.065127161.65
0.083142.11
0.120113.05
0.1884.78
6.0000.065152.4161.65
0.083142.11
0.120113.05
8.0000.120203.2113.05

Stainless steel seamless tube tolerances

Tube Outer Da in Milimeter Tube Tolerance in Milimeter
4 to 35 +/- 0.08
35 to 38 +/- 0.15
60 and above +/- 0.25
38 to 60 +/- 0.20

Application of SS welded tube

  • Springs
  • Screws
  • Food & Pharmaceutical Production Equipment
  • Nuts
  • Sanitary Ware & Troughs
  • Architectural Paneling
  • Saucepans
  • Cutlery & Flatware
  • Sinks & Splash Backs

SS exhaust tubing mechanical properties

GradeDensityStainless steel tube tensile strengthMelting PointYield Strength (0.2%Offset)Elongation
321/ 321H8.0 g/cm3Psi – 75000 , MPa – 5151457 °C (2650 °F)Psi – 30000 , MPa – 20540 %
347/ 347H8.0 g/cm3Psi – 75000 , MPa – 5151454 °C (2650 °F)Psi – 30000 , MPa – 20535 %
410S7.80 g/cm3Psi – 75000 , MPa – 5151532°C (2790°F)Psi – 30000 , MPa – 20525 %
304/304H/304L8.0 g/cm3Psi – 75000 , MPa – 5151400 °C (2550 °F)Psi – 30000 , MPa – 20535 %
310/310S7.9 g/cm3Psi – 75000 , MPa – 5151402 °C (2555 °F)Psi – 30000 , MPa – 20540 %
316/316L/316H8.0 g/cm3Psi – 75000 , MPa – 5151400 °C (2550 °F)Psi – 30000 , MPa – 20535 %
317/ 317L7.9 g/cm3Psi – 75000 , MPa – 5151400 °C (2550 °F)Psi – 30000 , MPa – 20535 %
904L7.95 g/cm3Psi – 71000 , MPa – 4901350 °C (2460 °F)Psi – 32000 , MPa – 22035 %

Equivalent of Hot finished SS tubing

STANDARDWERKSTOFF NR.GOSTUNS NumbarJISENBSAFNOR
SS 3161.4401 / 1.4436-S31600SUS 316X5CrNiMo17-12-2 /
X3CrNiMo17-13-3		316S31 / 316S33Z7CND17‐11‐02
SS 316L1.4404 / 1.443503Ch17N14M3 / 03Ch17N14M2S31603SUS 316LX2CrNiMo17-12-2 /
X2CrNiMo18-14-3		316S11 / 316S13Z3CND17‐11‐02 / Z3CND18‐14‐03
SS 316H--S31609--316S51-
SS 3171.4449-S31700SUS 317X5CrNiMo1713--
SS 3041.430108Х18Н10S30400SUS 304X5CrNi18-10304S31Z7CN18‐09
SS 304L1.4306 / 1.430703Х18Н11S30403SUS 304LX2CrNi18-9 / X2CrNi19-113304S11Z3CN18‐10
SS 304H1.4301–S30409––––
SS 3101.484120Ch25N20S2S31000SUS 310X15CrNi25-20310S24–
SS 310S1.484520Ch23N18S31008SUS 310SX8CrNi25-21310S16–
SS 317L1.4438-S31703SUS 317LX2CrNiMo18-15-4--
SS 3211.4541-S32100SUS 321X6CrNiTi18-10--
SS 321H1.4878-S32109SUS 321HX12CrNiTi18-9--
SS 3471.4550-S34700SUS 347X6CrNiNb18-10--
SS 347H1.4961-S34709SUS 347HX6CrNiNb18-12--
SS 4091.4512-S40900SUS409X2CrTi12--
SS 410S1.4516-S41008SUS410SX6CrNiTi12--
SS 904L1.4539STS 317J5LN08904SUS 904LX1NiCrMoCu25-20-5904S13Z2 NCDU 25-20

Stainless steel welded tube stock list

Wall Thk
milimeter		 Outer dia
milimeter		 Weight, Kilogram/meter Nominal sizes 316L 304L
2.11 21.34 1.02 1/2"Schedule 10S ✓ ✓
2.77 21.34 1.29 1/2"Schedule 40S ✓ ✓
2.11 26.67 1.30 3/4"Schedule 10S ✓ ✓
2.87 26.67 1.71 3/4"Schedule 40S ✓ ✓
1.65 33.40 1.31 1"Schedule 5S ✓ ✓
2.77 33.40 2.13 1"Schedule 10S ✓ ✓
3.38 33.40 2.54 1"Schedule 40S ✓ ✓
1.65 42.16 1.67 1 1/4"Schedule 5S ✓ ✓
2.77 42.16 2.73 1 1/4"Schedule 10S ✓ ✓
3.56 42.16 3.44 1 1/4"Schedule 40s ✓ ✓
1.65 48.26 1.92 1 1/2"Schedule 5S ✓ ✓
2.77 48.26 3.16 1 1/2"Schedule 10S ✓ ✓
3.68 48.26 5.49 1 1/2"Schedule 40S ✓ ✓
1.65 60.33 2.42 2"Schedule 5S ✓ ✓
2.77 60.33 3.99 2"Schedule 10S ✓ ✓
3.91 60.33 5.52 2"Schedule 40S ✓ ✓
3.05 73 5.35 2 1/2"Schedule 10s ✓ ✓
5.16 73 8.77 2 1/2"Schedule 40S ✓ ✓
2.11 88.90 4.58 3"Schedule 5S ✓ ✓
3.05 88.90 6.56 3"Schedule 10S ✓ ✓
5.49 88.90 11.47 3"Schedule 40S ✓ ✓
3.05 101.60 7.53 3 1/2"Schedule 10s ✓ ✓
2.11 114.30 5.93 4"Schedule 5S ✓ ✓
3.05 114.30 8.50 4"Schedule 10S ✓ ✓
6.02 114.30 16.32 4"Schedule 40S ✓ ✓
3.4 141.3 11.74 5"Schedule 10S ✓ ✓
6.55 141.3 22.1 5"Schedule 40S ✓ ✓
2.77 168.3 11.48 6"Schedule 5S ✓ ✓
3.4 168.3 14.04 6"Schedule 10S ✓ ✓
7.11 168.3 28.69 6"Schedule 40S ✓ ✓
2.77 219.1 15.0 8"Schedule 5S ✓ ✓
3.76 219.1 20.27 8"Schedule 10S ✓ ✓
8.18 219.1 43.2 8"Schedule 40S ✓ ✓
3.40 273 22.95 10"Schedule 5S ✓ ✓
4.19 273 28.2 10"Schedule 10S ✓ ✓
9.27 273 61.22 10"Schedule 40S ✓ ✓
3.96 323.9 31.72 12"Schedule 5S ✓ ✓
4.57 323.9 36.54 12"Schedule 10S ✓ ✓
9.53 323.9 75.02 12"Schedule 40S ✓ ✓
4.78 355.6 41.99 14"Schedule 10S ✓ ✓
9.53 355.6 82.583 14"Schedule STD ✓
9.53 406.4 94.706 16"Schedule STD ✓
4.78 406.4 48.07 16"Schedule 10S ✓ ✓
4.78 457.2 54.151 18"Schedule 10S ✓ ✓
5.54 508.0 69.702 20"Schedule 10S ✓ ✓
6.35 610.0 95.919 *24"Schedule 10S ✓ ✓

Chemical composition of SS round tube

GradesCarbonSulfurChromiumMolybdenumManganeseSiliconPhosphorusNickelNitrogen
3040.08 max0.03018.0-20.0–2.0 max0.75 max0.0458.0-10.50.10
304L0.030 max0.03018.0-20.0–2.0 max0.75 max0.0458.0-12.00.10
304H0.04-0.100.03018.0-20.0–2.0 max0.75 max0.0458.0-10.5–
3100.015 max0.015 max24.00 – 26.000.102 max0.15 max0.020 max19.00 – 21.0054.7 min
310S0.08 max0.030 max24.00 – 26.000.752 max1.0 max0.045 max19.00 – 21.0053.095 min
3160.08 max0.030 max16.00 - 18.002.00 - 3.002.0 max1.0 max0.045 max11.00 - 14.0067.845 min
316L0.035 max0.030 max16.00 - 18.002.00 - 3.002.0 max1.0 max0.045 max10.00 - 14.0068.89 min
316H0.10 max0.030 max16.00 - 18.002.00 - 3.000.10 max0.75 max0.045 max10.00 - 14.00-
SS 3170.08 max0.030 max18.00 - 20.003.00 - 4.002.0 max1.0 max0.045 max11.00 - 15.0057.845 min
SS 317L0.035 max0.030 max18.00 - 20.003.00 - 4.002.0 max1.0 max0.045 max11.00 - 15.0057.89 min
SS 3210.08 max0.030 max17.00 - 19.00-2.0 max1.0 max0.045 max5(C+N) – 0.70 max9.00 - 12.00
SS 321H0.04 – 0.100.030 max17.00 - 19.00-2.0 max1.0 max0.045 max9.00 – 12.000.10 max
SS 3470.08 max0.030 max17.00 - 20.00-2.0 max1.0 max0.045 max9.00 - 13.00-
SS 347H0.04 – 0.100.030 max17.00 - 19.00-2.0 max1.0 max0.045 max9.0 -13.0-
SS 4090.08 max0.030 max10.5 - 11.75-1.00 max1.00 max0.045 max0.5-
SS 410S0.080 max0.030 max10.5 - 12.5-1.00 max1.00 max0.040 max--
SS 904L0.020 max0.030 max19.00 – 23.004.00 – 5.00 max2.00 max1.00 max0.040 max23.00 – 28.00-

Annealed and Pickled Stainless Steel Round Tube

  • Annealing is a heat treatment process that involves heating the stainless steel to a specific temperature. This is followed by slow cooling to remove internal stresses and improve its ductility. Pickling is a chemical treatment process that involves immersing the stainless steel in an acid solution to remove surface impurities, oxides, and scale.
  • Stainless Steel Tube Supplier offers annealed tubes that have a soft, malleable structure with reduced hardness and increased flexibility. Pickled tubes have a smooth, clean and uniform surface.
  • The surface of annealed tubes may have a dark scale. Stainless Steel Tubing Manufacturers perform pickling to improve the appearance and corrosion resistance of the stainless steel.

What is Polished Stainless Steel Tubing?

Polished stainless steel tubing undergoes a mechanical or chemical polishing process to achieve a smooth and shiny surface finish. The polishing process takes place with abrasives or chemical agents to remove surface imperfections, scratches and roughness.

Polished ss tubing is known for its aesthetically pleasing appearance, corrosion resistance, and cleanability. The SS Tube Manufacturers In India produce the tubes for various architectural, decorative and hygienic applications.

Stainless Steel Rectangular vs Square Tubing

Apart from the obvious difference in shapes, the rectangular and square Stainless Steel Cds tubes also have different dimensions.

  • The rectangular one is also known as the box section and it is used in applications where light weight and medium strengths are the primary requirements. Square tubing is used for applications requiring higher strength and resistance to increased temperature and pressure.
  • Square tubes are generally more expensive than rectangular tubing due to their higher tensile strength.
  • They are also used for different applications. The rectangular tubing is used for transporting different fluid types. Whereas, SS Seamless Tubes manufacturer in India produces square tubing to be used in construction, solar brackets, etc.

FAQ

Is stainless steel tube strong?

It is Very strong, easy to clean and maintain

What are the 4 characteristics of SS tube?

  • Corrosion resistant.
  • High tensile strength.
  • Very durable.
  • Temperature resistant.

Is stainless steel tubing Magnetic?

Non-magnetic

What is the wall thickness of SS tubing?

0.050″ (1.27 mm) to 1.25″ (31.75 mm)

What is the working pressure of stainless steel seamless tube?

20 000 psi (137.8 MPa)