Stainless Steel 316L ERW Pipes

The history of Stainless Steel 316L Erw Pipes dates back to the 19th century, in 1821, when a French Metallurgist- Pierre Berthier, made the discovery that iron-chromium alloys were resistant to certain types of acid.The early application of this material was in the manufacturing of cutlery but the brittle nature made the venture fail and it was not until 1975 that a major discovery was made.

During this time, another Frenchman, Brustlein, explored the different low levels of carbon and by 1890, Hans Goldschmidt had developed a process with which carbon-free chromium could be produced. Finally, stainless steel came to limelight in 1912 when Harry Brearly carried out experiment involving steel with chromium-content to stop the inner part of rifle barrels from hastened erosion.

Now, in 2018, we have over 150 grades of steel and one of the commonly used one is 316L stainless steel erw Pipes. Millions of tons are manufactured yearly and there’s no obvious end to this trend. In the following paragraphs, we shall discuss what 316L stainless steel erw pipes are, the different Seamless and ERW/welded stainless steel materials, and the different properties.

The Stainless Steel 316L ERW Pipes Ready Stock List :

  • 1/2″ NB X SCH 10
  • 1/2″ NB X SCH 40
  • 1″ NB X SCH 10
  • 1″ NB X SCH 40
  • 1.1/2″ NB X SCH 10
  • 1.1/2″ NB X SCH 40
  • 2″ NB X SCH 10
  • 2″ NB X SCH 40
  • 3″ NB X SCH 10
  • 3″ NB X SCH 40
  • 4″ NB X SCH 10
  • 4″ NB X SCH 40
  • 6″ NB X SCH 10
  • 6″ NB X SCH 40
  • 8″ NB X SCH 10
  • 8″ NB X SCH 40

Sonha (Vietnam) make with Material Test Certificate

This is the standard molybdenum-bearing grade of stainless steel is the second most produced steel material after the 304 grade. It has better properties in terms of resistance to corrosion and heat and it is particularly better when it is being used in a corrosive or heated environment.

The Stainless Steel 316L ERW Pipes

This is a low carbon version of the 316 grade- meaning it has lower carbon content and a considerably high immunity from carbide precipitation. These properties make the material ideal for use in oil and gas industries as well as chemical engineering companies where properties such as the ease of fabrication and resistance to corrosion are leveraged.

Stainless Steel 316L ERW Pipes
Stainless Steel 316L ERW Pipes
Stainless Steel 316L ERW Pipes
Stainless Steel 316L ERW Pipes
Stainless Steel 316L ERW Pipes
Stainless Steel 316L ERW Pipes

Specification of Stainless Steel 316L ERW

Specifications ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790
Dimensions ASTM, ASME and API
316L Pipe & Tubes 1/2″ NB – 24″ NB
ERW 316L Pipes & Tubes 1/2″ NB – 24″ NB
EFW 316L Pipes & Tubes 6″ NB – 100″ NB
Tubing Size 1/8″NB TO 30″NB IN
Specialized in SCH 10, SCH 40 AND SCH 80
Schedule SCH5, SCH10, SCH20, SCH30, SCH40, Std, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type Seamless / ERW / Welded / Fabricated / LSAW Pipes
Form Round, Square, Rectangular, Hydraulic Etc
Length Single Random, Double Random & Cut Lengtd.
End Plain End, Beveled End, Treaded

ERW/Seamless 316L Stainless Steel Pipes

Electric Resistance Welded stainless steel involves spot and seam welding. Here, the sides of the steel are trimmed in order to control the width and also to condition the edges for welding. The steel is then passed through several contoured rollers and these form the tub-like structure.

Seamless Stainless Steel tubing can either be hot-drawn or cold-drawn. In a cold-drawn process, the machinability of the steel is improved as well as the strength. It also has improve tolerance when compared to the hot finished steel.

On the other hand, hot finished stainless steel tubing is used in tubes which require thicker walls and higher strength. It is also more cost effective compared to cold-drawn steel.

Physical Properties of Stainless Steel 316L ERW Pipes

Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of thermal Expansion (m/m/0C) thermal Conductivity (W/m.K) Specific Heat 0-1000C (J/kg.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
316 8000 193 15.9 16.2 17.5 16.3 21.5 500 740
316L 8000 193 15.9 16.2 17.5 16.3 21.5 500 740

Mechanical Properties of  Stainless Steel 316L ERW Pipes

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
316 515 205 40% 95 217
316L 485 170 40% 95 217

Applications of the Stainless Steel 316L ERW Pipes

  1. 316L stainless steel pipe finds application in several industries, and some of them are mentioned below.
  2. 316L stainless steel pipes are used for process engineering
  3. They are also used in manufacturing heat exchangers
  4. It is also not unusual to find ERW/seamless stainless steel pipes in petrochemical, chemical, and pharmaceutical industries.
  5. It also finds application in transporting liquid and gases.

Chemical Composition of Stainless Steel 316L ERW

Grade C Mn Si P S Cr Mo Ni N
316 min. 16.0 2.00 11.0
max. 0.08 2.00 0.75 0.045 0.03 18.0 3.00 14.0 0.10
316L min. 16.0 2.00 10.0
max. 0.030 2.00 0.75 0.045 0.030 18.0 3.00 15.0 0.10