304L Stainless Steel Sheet, Coil, and Plate - AMS 5511, 5513

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304L stainless steel (AMS 5511), is a variation of stainless steel 304 with a lower-carbon content. Type 304L maximum carbon content is 0.03%. It also has lower mechanical properties than 304.

Type 304L materials can be used in the welded condition as opposed to the annealed condition and still maintain resistance to corrosion and lend themselves to many types of fabrication.  This grade resists corrosion and are often used in the food industry.  United Performance Metals purchases 304L stainless steel dual certified as 304 and 304L. 


304L Inventory Size Ranges

Sheet & Coil

0.0157" - 0.125"

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Plate

0.1875" - 2.000"

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Custom Engineered Strip

0.0008" - 0.012"

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Standard Inventory Specifications

  • UNS S30403
  • AMS 5511
  • AMS 5513
  • ASTM A 240
  • ASTM A 276
  • ASTM A 479
  • ASTM A 484
  • ASME SA 240

Other industry standards we comply with:

  • W.NR 1.4307
  • PWA-LCS
  • GE Aircraft Engine (GT193)
  • GE Aviation S-SPEC-35 AeDMS S-400
  • RR SABRe Edition 2
  • DFARS Compliant

Common Trade Names

  • ATI 304L (™ Allegheny Technologies)
  • Type 304L Steel

Common Applications of 304L

  • Aerospace structures
  • Base plates and fasteners
  • Food and beverage industry
  • Heat exchangers
  • Fasteners like nuts and bolts used in corrosive marine environments
  • Textiles and acidic dyes
  • Processing equipment where corrosion at welded joints is a concern
  • Containers for chemicals or transport
304 Chemical Composition
Element Percent by Weight
C Carbon 0.030 max
Mn Manganese 2.00 max
P Phosphorus 0.045 max
S Sulfur 0.03 max
Si Silicon 0.75 max
Cr Chromium 18.000 - 20.000
Ni Nickel 8.000 - 12.000
N Nitrogen 0.10 Max
Fe Iron Balance

304L Physical Properties

  • Density: 0.29 lb/in³ (8.03 g/cm³)
  • Modulus of Elasticity in Tension 29 x 106 psi (200 GPa)

Linear Coefficient of Thermal Expansion

Temperature Range Mean Coefficient of Thermal Expansion
°C °F mm/mm/°C in/in/°F · 10?
20 - 100 68 - 212 16.6 · 10-6 9.2 · 10-6
20 - 870 68 - 1600 19.8 · 10-6 11 · 10-6

 

Thermal Conductivity

Temperature Range W/m · K Btu/(hr/ft²/in/°F)
°C °F
100 212 16.3 9.4
500 932 21.4 12.4

Specific Heat

°C °F J/kg °K Btu/lb/°F
0-100 32-212 500 0.12

Magnetic Permeability

  • H/m Annealed
  • 1.02 Max @ 200 H

Electrical Resistivity

°C °F Microhm-cm MIcrohm-in.
20 68 72 28.3
100 212 78 30.7
200 392 86 33.8
400 752 100 39.4
600 1112 111 43.7
800 1472 121 47.6
900 1652 126 49.6

Mechanical Properties and Yield Strength of 304L stainless

 
Property 302,304 304L
0.2% Offset Yield Strength, psi (MPa) 42 (290) 35 (241)
Ultimate Tensile Strength, psi (MPa) 90 (621) 85 (586)
Elongation % in 2 in. (50.8 mm) 55 55
Hardness Rockwell B82 B80

 

304 stainless steel decimal chart

Additional information about 304L

The most common Austenitic grade is Type 304/304L.  All other grades are developed from the 18-8 base by adding alloying elements to provide special corrosion-resistance, improved properties or better weldability.  Type 304/304L makes up over 60% of all the stainless steel made in world today. 

The wide usage of 304/304L stainless steel in food and beverage and pharmaceutical applications reflects the corrosion resistance qualities of these materials.  These industries demand that materials do not release significant quantities of contaminants into the product. They must also be easily cleaned.  For example, liquid blending and storage tanks are readily cleaned, providing proper hygiene in food prep as well as food and beverage handling.  Commercial dishwashing detergents eliminate 97% of microorganisms adhering to stainless steel surfaces.  Flavor and color are kept intact, with no impact from contact with the tank material.

Another innovative use of 304/304L can be found in architectural planning.  Sustainable engineering provides for a building's longevity and safety.  Design guidance for stainless steel structures incorporates the ability to hold up against the most severe natural disasters and even considers the resilience to withstand what we consider normal weather impact over time.  One example of sustainable engineering can be found in the National Archives of Canada in Gatineau, Quebec.  This impressive structure was designed to withstand flooding and seismic events.  The characteristics of nickel-containing Type 304L used in the structure provide safe-keeping for the country's most precious historical documents.  


The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.

For a deeper understanding of the difference between 304 and 316, request our white paper on the topic