1.4307 (304L)

Low carbon chromium-nickel austenitic stainless steel.

Stainless steel types 1.4301 and 1.4307 are also known as grades 304 and 304L respectively. Type 304 is the most versatile and widely used stainless steel. It is still sometimes referred to by its old name 18/8 which is derived from the nominal composition of type 304 being 18% chromium and 8% nickel.

Type 304L is the low carbon version of 304. It is used in heavy gauge components for improved weldability. Some products such as plate and pipe may be available as “dual certified” material that meets the criteria for both 304 and 304L.

Quarto Plate is hot rolled plate over 12mm thick that has not been coiled during production. CPP is continuously produced plate up to 12mm thick that has been coiled during rolling. Sheet is cold rolled.

Property data given in this document is typical for bar and flat rolled products covered by EN standards. ASTM, EN or other standards may cover products sold. It is reasonable to expect specifications in these standards to be similar but not necessarily identical to those given in this datasheet.

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Range

Bar & Tube Imperial Sizes Metric Sizes
Round Bar 3" - 16"
Flat Bar 20 x 10mm - 100 x 25mm
Welded Ornamental Tube 12" - 4" 30mm - 50mm
Welded Tube 1/"2 - 2" 16mm - 50mm
Hygienic Tube 34 " - 4"
Sheet/Plate Sheet Size Thicknesses
Polished Sheet 2000 x 1000 0.7mm - 3.0mm
Polished Sheet 2500 x 1250 0.7mm - 6.0mm
Polished Sheet 3000 x 1500 1.0mm - 6.0mm
Polished Sheet (Circle) 2500 x 1250 0.7mm - 1.5mm
Sheet Cold Rolled 2500 x 1250 4.0mm - 6.0mm
Sheet Cold Rolled 3000 x 1500 4.0mm - 6.0mm
Sheet Cold Rolled 4000 x 2000 2.0mm - 6.0mm
CPP Plate ID Finish 2000 x 1000 3.0mm - 6.0mm
CPP Plate ID Finish 2500 x 1250 3.0mm - 12.0mm
CPP Plate ID Finish 3000 x 1500 3.0mm - 12.0mm
CPP Plate ID Finish 4000 x 1500 10.0mm - 12.0mm
CPP Plate ID Finish 4000 x 2000 2.0mm - 12.0mm
Quarto Plate ID Finish 5" - 125"

Polished sheet sizes are for mirror and super mirror finishes.

Polished Sheet options available: 240 Silicon, 240 Grit and various coating including Fiber Optic Laser for one or two sides.

If you do not see what you are looking for, please contact your local service centre with your specific requirements.

Related Specifications

Stainless steel grade 1.4301/304 also corresponds to the following designations but may not be a direct equivalent:

  • S30400
  • 304S11
  • EN58E

Properties

Chemical Composition

Applications

  • Sinks and splashbacks
  • Saucepans
  • Cutlery and flatware
  • Architectural panelling
  • Sanitaryware and troughs
  • Piping & tubing
  • Brewery, dairy, food and pharmaceutical production equipment
  • Cryogenic and food tanks and trailers
  • Springs, nuts, bolts and screws

Characteristics

  • Low carbon version of 304
  • Austenitic stainless steel
  • Contains 18% chrome and 8% nickel
  • Excellent welding and forming properties
  • Machinability is reasonable
  • High corrosion resistance
  • Excellent drawing properties
  • Good resistance to pitting and crevice corrosion
  • Good ductility
  • Good polishing ability

Additional Information

Weldability

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