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304l Stainless Steel Sheet & Plate

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

304L stainless steel is a low-carbon variant of the popular 304 stainless steel, renowned for its excellent corrosion resistance and versatility. The lower carbon content in 304L minimizes carbide precipitation during welding, making it an ideal choice for heavy welding applications without compromising corrosion resistance.

 

Key Features 304l Stainless Steel Sheet & Plate:

  • Corrosion Resistance: 304L stainless steel offers superior resistance to a wide range of corrosive environments, including atmospheric, chemical, and freshwater exposure.
  • Ease of Fabrication: This material is easy to form, weld, and machine, making it suitable for various industrial applications.
  • Durability: Its inherent strength and toughness ensure long-lasting performance, even in challenging conditions.
  • Hygienic Properties: 304L’s non-porous surface resists bacteria and is easy to clean, making it an excellent choice for food and medical industries.

 

Technical Specifications

  • UNS Number: S30403
  • DIN/EN Designation: 1.4307

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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