SS welded tubes grade 347 Diameter 15.8mm X 1.2 mm thickness

SS Welded tubes grade 347 Diameter 15.8mm X 1.2 mm thickness, Suppliers & Exporters in India.

Stainless Steel Welded Tubes are widely used in industries that demand high resistance to corrosion and heat. Among the many grades, SS 347 (UNS S34700) stands out for its exceptional resistance to intergranular corrosion, especially after exposure to temperatures that result in chromium carbide precipitation (around 800-1500°F or 425-815°C). The addition of niobium (columbium) stabilizes this austenitic steel, making it ideal for high-temperature applications.

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Why Choose SS 347 Welded Tubes?

  • Superior Corrosion Resistance:SS 347 is more resistant to corrosion in high-temperature environments compared to other austenitic steels. It excels in environments with sulfuric, nitric, and phosphoric acids.
  • High-Temperature Stability: SS 347 tubes can be used in continuous service at temperatures up to 1500°F (816°C), making them ideal for furnace parts, heat exchangers, and aircraft exhaust manifolds.
  • Weldability & Durability: These tubes exhibit good weldability and can handle high stress, making them suitable for industries such as petrochemical, power generation, and aerospace.

Specifications of SS Welded Tube: Diameter 15.8mm X 1.2mm Thickness

For specialized applications, precision dimensions play a critical role. The SS Seamless Tube Grade 347 with a 15.8mm diameter and 1.2mm wall thickness is perfect for industries that require tubes with high mechanical strength, dimensional accuracy, and corrosion resistance.

Dimensions and Specifications:

  • Outer Diameter: 15.8mm
  • Wall Thickness: 1.2mm
  • Material Grade: SS 347
  • Length: Customizable according to project requirements
  • Standards:ASTM A312, ASTM A213, or as per customer specifications

Applications of SS 347 Welded Tubes

Due to its excellent properties, SS 347 seamless tubes with a 15.8mm diameter and 1.2mm thickness are suitable for a wide range of applications:

  • Heat Exchangers: The high-temperature stability of SS 347 makes it ideal for use in heat exchangers that operate at elevated temperatures.
  • Chemical Processing Equipment: The superior resistance to acid attacks, especially in harsh environments like sulfuric or nitric acid processing.
  • Aerospace and Aircraft ComponentsUsed in aircraft exhaust manifolds and other high-temperature components due to its thermal stability and corrosion resistance.
  • Pharmaceutical and Food Processing: The hygienic nature of stainless steel, coupled with its high resistance to corrosion, makes it ideal for manufacturing equipment in these sectors.

Benefits of Seamless Tubes Over Welded Tubes

While both seamless and welded tubes are available in SS 347, seamless tubes offer several advantages:

  • Uniformity of Structure: Seamless tubes do not have a weld seam, which makes them structurally stronger and more reliable in high-pressure applications.
  • Enhanced Durability:Due to the absence of a weld seam, seamless tubes have a higher resistance to corrosion and oxidation.
  • Precision in Manufacturing:: Seamless tubes offer superior dimensional accuracy, crucial for applications that demand exact tolerances.

Stainless Steel Pipes Dimension – (S.S. Pipes)

Stainless Steel Pipes Dimension – (S.S. Pipes)
Wall thickness in mm. 0.5 0.6 0.7 0.8 1 1.2 1.6 2 2.6 3 3.2 3.6
O.D. in mm. Weight in kg/meter
6 0.069 0.081 0.093 0.104 0.125 0.144 0.176 – – – – –
9.52 0.112 0.134 0.154 0.174 0.213 0.249 0.317 – – – – –
10 0.119 0.141 0.163 0.184 0.225 0.264 0.336 – – – – –
12.7 0.153 0.182 0.21 0.238 0.293 0.345 0.444 – – – – –
14 0.169 0.201 0.233 0.264 0.325 0.384 0.496 – – – – –
15.87 0.192 0.229 0.266 0.301 0.372 0.44 0.571 0.694 – – – –
19 0.231 0.276 0.32 0.364 0.45 0.534 0.696 0.85 1.066 1.2 1.264 –
25 0.306 0.366 0.425 0.484 0.6 0.714 0.936 1.15 1.456 1.65 1.744 1.926
25.4 0.311 0.372 0.432 0.492 0.61 0.726 0.952 1.17 1.482 1.68 1.776 1.962
31.8 – – – – – 0.918 1.208 1.49 1.898 2.16 2.288 2.538
38 – – – – – 1.104 1.456 1.8 2.301 2.625 2.784 3.096
44.5 – – – – – 1.299 1.716 2.125 2.724 3.113 3.304 3.681
50.8 – – – – – 1.488 1.968 2.44 3.133 3.585 3.808 4.248
63.5 – – – – – – 2.476 3.075 3.959 4.538 4.824 5.391
76.1 – – – – – – 2.98 3.705 4.778 5.483 5.832 6.525
101.6 – – – – – – 4 4.98 6 7 7,872 8.82

Chemical Composition

CHEMICAL COMPOSITION (IN PERCENTAGE)
Grade C (Max) Mn (Max) P (Max) S (Max) Si (Max) Cr Ni Mo Nitrogen (Max) Cu/ Others
301 0.15 2 0.045 0.03 1 16.00 – 18.00 6.00 – 8.00 – 0.1 –
304 0.08 2 0.045 0.03 0.75 18.00 – 20.00 8.00- 10.50 – 0.1 –
304L 0.03 2 0.045 0.03 0.75 18.00 – 20.00 8.00- 12.00 – 0.1 –
310S 0.08 2 0.045 0.03 1.5 24.00- 26.00 19.00 – 22.00 – – –
316 0.08 2 0.045 0.03 0.75 16.00 – 18.00 10.00 – 14.00 2.00 – 3.00 0.1 –
316L 0.03 2 0.045 0.03 0.75 16.00 – 18.00 10.00 – 14.00 2.00 – 3.00 0.1 –
317 0.08 2 0.045 0.03 0.75 18.00 – 20.00 11.00 – 14.00 3.00 – 4.00 0.1 –
317L 0.03 2 0.045 0.03 0.75 18.00 – 20.00 11.00 – 15.00 3.00 – 4.00 0.1 –
321 0.08 2 0.045 0.03 0.75 17.00 – 19.00 9.00 – 12.00 – 0.1 Ti5 ( C + N ) Min or 0.70 max
347 0.08 2 0.045 0.03 0.75 17.00 – 19.00 9.00 – 13.00 – – Cb= 10x ( C Min ) or 1.00 Max
409 0.08 1 0.04 0.01 1 10.50 – 11.75 0.5 – – Ti= 6x (C+ N ) Min or 0.70 Max
409M 0.03 0.81.2 0.03 0.03 0.40.75 11.00- 12.00 1.5 max. – – Ti= 6x (C) Min or 0.70 Max
410S 0.08 1 0.04 0.03 1 11.50- 13.50 0.6 – – –
410 0.15 1 0.04 0.03 1 11.50- 13.50 0.75 – – –
420 0.35 0.5 0.035 0.015 0.5 12.00 – 13.00 0.20.3 – – –
430 0.12 1 0.04 0.03 1 16.00 – 18.00 0.75 – – –
JSL AUS 0.08 7.08.0 0.07 0.03 0.75 15.50 – 16.50 4.25 – 4.75 – – 0.9 – 1.10
JS- 203 0.08 9.2510.25 0.07 0.03 0.75 14.25 – 15.25 2.25 – 2.75 – – 1.60- 2.0
301M 0.1 4.55.5 0.06 0.03 0.75 14.50 – 15.50 6.0 – 7.0 – – 1.70- 1.90
* Thickness of 1.27mm & below will have elongation of 20% min.

Mechanical Properties

MECHANICAL PROPERTIES
Grade Tensile Strength
Mpa, (Min)		 Yield Strength
Mpa, (Min)		 %Age Elongation
in 50mm gauge
length min		 Hardness (Max)
BHN Rb
301 515 205 40 217 95
304 515 205 40 201 92
304L 485 170 40 201 92
310S 515 205 40 217 95
316 515 205 40 217 95
316L 485 170 40 217 95
317 515 205 35 217 95
317L 515 205 40 217 95
321 515 205 40 217 95
347 515 205 40 201 92
409 380 170 20 179 88
409M 430 275 20 187 90
410S 415 205 22 183 89
410 450 205 20 217 89
420 700( max ) – 15 217 95
430 450 205 22 183 89
JSL AUS 515 205 40 217 95
JS- 203 515 205 40 217 95
301M 515 205 40 217 95


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