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304l Stainless Steel Sheet & Plate

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304l Stainless Steel Sheet & Plate (UNS S30403, 1.4307)

At DNYA Stainless Steel, we provide premium-quality 304L Stainless Steel Sheets and Plates, a low-carbon modification of the widely used 304 grade. Renowned for its excellent corrosion resistance, superior weldability, and clean surface finish, 304L (UNS S30403 / EN 1.4307) is a preferred material for industries requiring welded components and long-term corrosion protection.

 

Our inventory includes cold-rolled and hot-rolled 304L stainless steel sheets and plates in various dimensions, finishes, and thicknesses, all conforming to international standards like ASTM A240 and EN 10088.

What is 304L Stainless Steel?

304L stainless steel is the low-carbon version of 304 stainless steel, designed to minimize the risk of intergranular corrosion after welding or high-temperature exposure. It offers the same chemical resistance and mechanical strength as 304, with the added advantage of improved weldability.

Due to its excellent corrosion resistance, formability, and non-reactivity, 304L is widely used in food processing, chemical equipment, architectural structures, and pharmaceutical applications.

 

Key Features of 304L Stainless Steel Sheet & Plate

  • Low Carbon Content (≤ 0.03%)
    Reduces risk of carbide precipitation during welding.

  • Superior Corrosion Resistance
    Excellent performance in oxidizing and mildly acidic environments.

  • Outstanding Weldability
    Can be welded without post-weld heat treatment.

  • High Ductility and Formability
    Ideal for deep drawing, bending, and fabrication.

  • Non-Magnetic in Annealed Condition
    May exhibit slight magnetism after cold working.

  • Global Standard Compliance
    Conforms to ASTM A240, EN 1.4307, JIS SUS304L, and other norms.

Available Thickness

3/16″
1/4″
5/16″
3/8″
7/16″
1/2″
9/16″
5/8″
3/4″
7/8″
1″
1 1/8″
4.8mm
6.3mm
7.9mm
9.5mm
11.1mm
12.7mm
14.3mm
15.9mm
19mm
22.2mm
25.4mm
28.6mm
1 1/4″
1 3/8″
1 1/2″
1 5/8″
1 3/4″
2″
2 1/4″
2 1/2″
2 3/4″
3″
3 1/4″
3 1/2″
31.8mm
34.9mm
38.1mm
41.3mm
44.5mm
50.8mm
57.2mm
63.5mm
69.9mm
76.2mm
82.6mm
88.9mm
3 3/4″
4″
4 1/4″
4 1/2″
4 3/4″
5″
5 1/4″
5 1/2″
5 3/4″
6″
95.3mm
101.6mm
108mm
114.3mm
120.7mm
127mm
133.4mm
139.7mm
146.1mm
152.4mm

304l-stainless-steel-sheet-plate

Application

  • Automotive
  • Chemical and Pharmaceutical
  • Fertilizer
  • Food Processing and Handling
  • Manufacturing
  • Mining
  • Oil & Gas
  • Phosphate Mining

Standard

  • ASTM A240 / A240M
  • ASTM A276 / A276M
  • ASTM A312 / A312M
  • ISO 15510
  • EN 10088-2
  • IN 10204
  • HE G4304
  • HE G4305
  • ASME SA240 / SA240M
  • ASME SA312 / SA312M

Worldwide equivalents of grade 304L

(USA: AISI, ASTM, UNS)

Country
Standard
Grade
USA
ASTM
304L
USA
UNS
S30403
Europe
EN
1.4307
Germany
DIN
X2CrNi18-9
Japan
JIS
SUS304L
UK
BS
304S11
International
ISO
X2CrNi18-9
Russia
GOST
08Х18Н10

Corrosion Resistance

  • General Corrosion: 304L offers good resistance to a wide range of chemicals and environmental conditions, including atmospheric corrosion. It’s resistant to oxidation in intermittent service up to 870°C and in continuous service up to 925°C.
  • Pitting and Crevice Corrosion: While 304L performs well in many environments, it is not as resistant to pitting and crevice corrosion as more alloyed stainless steels (like 316L). Pitting can occur in chloride-rich environments, such as saltwater.
  • Stress Corrosion Cracking: 304L has a lower carbon content compared to 304, which reduces the risk of carbide precipitation and enhances its resistance to stress corrosion cracking.
  • Oxidation Resistance: It maintains its oxidation resistance at high temperatures, which is beneficial for applications that involve intermittent exposure to high temperatures.

304l Chemical Composition

Element
Composition (%)
Carbon (C)
≤ 0.03
Silicon (Si)
≤ 0.75
Manganese (Mn)
≤ 2.00
Phosphorus (P)
≤ 0.045
Sulfur (S)
≤ 0.030
Chromium (Cr)
18.0 – 20.0
Nickel (Ni)
8.0 – 12.0

304l Physical Properties

Property
Value
Density
7.93 g/cm³
Electrical Resistivity
72 µΩ·cm at 20°C
Thermal Conductivity
16.2 W/m·K at 100°C
Specific Heat Capacity
500 J/kg·K at 0-100°C
Thermal Expansion Coefficient
17.3 µm/m·K (0-100°C)
Modulus of Elasticity (Young’s Modulus)
193 GPa
Poisson’s Ratio
0.3

304l Mechanical Properties

Property
Value
Tensile Strength
485 MPa (70,300 psi)
Yield Strength (0.2% offset)
170 MPa (24,700 psi)
Elongation at Break
40%
Hardness, Brinell
170
Hardness, Rockwell B
80

Fabrication Data

  • Welding: 304L is highly weldable using most welding techniques. Its low carbon content minimizes carbide precipitation, which can cause corrosion. It is commonly welded using TIG (Tungsten Inert Gas), MIG (Metal Inert Gas), and other welding processes. Post-weld heat treatment is generally not required for 304L.

  • Machining: 304L can be machined with standard tools and techniques. Due to its tough nature, using sharp tools and proper cooling/lubrication can help improve machinability and reduce tool wear.

  • Forming: The steel is quite ductile and can be easily formed using processes like stamping, bending, and drawing. Cold working will increase its strength but may require annealing to restore ductility.

  • Heat Treatment: 304L does not respond to heat treatment in a way that significantly alters its mechanical properties. It is typically annealed at temperatures between 1850°F and 2050°F (1010°C and 1120°C) to relieve stress and enhance its corrosion resistance.

  • Corrosion Resistance: 304L provides excellent resistance to a variety of corrosive environments. It is particularly good in mildly corrosive environments and resists oxidation and various acids well.

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For more information or to request a quote, contact us today to discuss how Stainless Steel Plate 304l can meet your specific project needs.