SS welded pipes grade 321 Diameter 48.3 mm X Sch 10

SS welded pipes grade 321 Diameter 48.3 mm X Sch 10 , Suppliers & Exporters in India.

Stainless steel pipes are vital in various industries due to their corrosion resistance, durability, and strength. Grade 321 stainless steel is a popular choice for applications requiring high-temperature resistance and excellent oxidation properties. This article explores SS welded pipes of Grade 321, specifically focusing on the 48.3 mm diameter and Schedule 10 specifications.

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What is Grade 321 Stainless Steel?

Grade 321 is an austenitic stainless steel that contains titanium, enhancing its resistance to intergranular corrosion, particularly after exposure to high temperatures. This grade is ideal for applications in aerospace, chemical processing, and oil and gas industries.

Key Properties of Grade 321 Stainless Steel

  • Corrosion Resistance:: Excellent resistance to a wide range of corrosive environments.
  • Temperature Resistance: Maintains strength and stability at elevated temperatures up to 900°C (1650°F).
  • Ductility and Weldability: Good weldability and formability, making it suitable for various manufacturing processes.
  • Strength:Offers high tensile strength and durability.

Specifications of SS Welded Pipes

  • Diameter:48.3 mm
  • Schedule: 10
  • Wall Thickness: Approximately 2.77 mm (0.109 inches)
  • Length: Customizable based on project requirements.

Advantages of Using SS Welded Pipes Grade 321

  • Seamless Design: The absence of seams reduces the risk of leakage and increases the pipe's structural integrity.
  • Versatility:Suitable for a variety of applications, including heat exchangers, pressure vessels, and fluid transport.
  • Low Maintenance: The corrosion-resistant properties lead to lower maintenance costs over the lifespan of the pipes.

Applications

  • Chemical Processing: Used in reactors, heat exchangers, and piping systems due to its resistance to corrosive chemicals.
  • Aerospace: Ideal for components that require high-temperature performance and reliability.
  • Oil and Gas: Employed in extraction and refining processes where durability is essential.

Manufacturing Process

The production of SS welded pipes involves several steps:

  • Material Selection: High-quality stainless steel is chosen for its properties.
  • Forming:The steel is heated and formed into a cylindrical shape.
  • Welding:The edges are welded using advanced techniques to ensure a strong bond.
  • Finishing:The pipes undergo various finishing processes, including pickling and passivation, to enhance corrosion resistance.

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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