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1.4404 Material – Low Carbon Austenite Stainless Steel

What are 1.4404 Stainless Steels?

1.4404 is the low carbon grade of 1.4401 Steel. It shows good acid resistance. It is not susceptible to carbide precipitation at the grain boundary and therefore it is unaffected from sensitization. It is mostly used in welded parts of a greater thickness of over 0.2 inches. The austenitic microstructure also provides these stainless grades robust toughness, at lower temperatures as low as absolute zero (−273 degree Celsius).

1.4404, is also known as 316L stainless steel, has a lower carbon content in it as compared with its family grade 1.4401 steel. Although 1.4404 has a lower carbon content, it is very much alike to 1.4401 in most of the commercial and industrial applications. Importantly the cost of both the related grades are also nearly the same, and both last long, with incredible properties of corrosion resistant, and a great choice for stress centric usages. 1.4404, in contrast, is a great choice for consumption where a lot of welding is required as 1.4404 is less prone to weld decay.

Is 1.4404 Stainless Steel Magnetic?

It is an austenite material and thus non-martensitic stainless steel. It is nonmagnetic in its properties.

Dimensional Characteristics of 1.4404 Material

There are no specified dimensional ranges because this grade is available in various forms. If we go in listing each form it will be inappropriate. It is to the manufacturer’s what are their limitations for dimensional ranges of different forms. Buyers are recommended to inquire the dimensional requirements with manufacturers, so they can review capacity limitations and then they can commit.

A stockist is selling this type in following forms and dimensions:

Material Form Min Diameter (mm) Max Diameter (mm)
Round 2 250
Material Form Min Size (mm) Max Size (mm)
Hexagonal 8 70
Flat Min Thickness: 5mm

Max Thickness: 20mm

Min Width: 20mm

Max Width: 100mm

Square 12×12 mm2 150×150 mm2

Available Forms in Market

Following are the available forms of 1.4404 Stainless Steels:

  • Containers
  • Wire
  • L shape
  • Sheets & plates
  • Forged Items
  • Tubing & pipes
  • Bars
  • Round Rods
  • Squares
  • Flat sheets
  • Flanges
  • Fastening components
  • Assembled parts

The Chemical Composition of 1.4404 Stainless Steel

Chemical alloying compositions are explicated below

  • Maximum percentage of Carbon (C) is 0.03
  • Maximum percentage of Manganese (Mn) is 2.0
  • Maximum percentage of Phosphorus (P) is 0.045
  • Maximum percentage of Sulphur  (S) is 0.03
  • Percentage of Molybdenum is indicated between 2.0 to 2.5
  • Maximum percentage of Silicon  (Si) is 1.0
  • Maximum percentage of Nickel (Ni) is 13.5 and minimum is 10.5
  • Maximum percentage of Chromium (Cr) is 18.5 whereas the minimum percentage of Chromium is 16.5

Rest is the base metal i.e. iron (Fe).

1.4404 stainless steel have acid resistant properties alongwith outstanding welding qualities.  Type 1.4404 stainless steel is used in automotive, ship building industry, chemical, phamateutical industry, food industry and oil and gas industry.

Mechanical Properties for Bars and Sections

  • Minimum Tensile strength is around 500 Mpa as in EN 10088-3 source.
  • Minimum Yield strength is 170Mpa (in EN 10088-3 technical source)
  • Maximum Hardness in HB (in EN 10088-3) is around 215.
  • Elongation is 40% in 2″ in the standard.
  • Type 1.4404 also can be welded for thicker gauges.

Equivalent Materials of 1.4404 Stainless Steel

The equivalent materials for 1.4404 Stainless Steels specified in other recognized standards are as follows:

  • In JIS standard, the equivalent material is SUS 316L.
  • In American standard, the equivalent material is 316L type steel.
  • In UNS standard, the equivalent material is S31603 type steel industrial

Applications of 1.4404 Material

Variety of industrial and household applications consume this material, some of the applications are as follows:
  • Pipes and containers in the Oil and Gas Industry
  • Equipment in the food industry
  • Equipment in the Sewage Plants
  • Equipment in the Chemical and Pharma Industry
  • Surgical Speculas & medical implants
  • Tubes of Heat Exchangers
  • Feed water tubes and duct works

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Note: Mechanical and chemical properties given in values are indicative and for information purpose only. Some of the given information can be outdated. There are also minor possibilities for inaccuracies in the text due to human error. For inaccuracies & outdated text you can Complaint Us.


Waqas Imam is an Industrial Engineer, Certified Lead Auditor, Material Consultant and Blog Writer.

  1. Celik says:

    1.4404 Stainless Steel It would be great if you could write a more detailed article on the subject.

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