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304 Stainless Steel Sheet & Plate

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304 Stainless Steel Sheet & Plate (UNS S30400, 1.4301)

304 stainless steel, also known as UNS S30400 or 1.4301, is a versatile and widely used austenitic stainless steel known for its excellent corrosion resistance, strength, and formability. It contains a balanced composition of 18-20% chromium and 8-10.5% nickel, earning it the nickname “18/8 stainless steel.” These elements provide superior resistance to oxidation, rust, and most acidic settings, making it an excellent choice for a variety of applications.

 

Key Features

  • Corrosion Resistance: 304 stainless steel exhibits excellent resistance to a wide range of corrosive environments, including mild chemicals, acidic solutions, and freshwater.
  • Mechanical Properties: With a tensile strength of around 515 MPa and good elongation properties, it combines durability and flexibility.
  • Hygiene & Aesthetics: Its smooth surface finish is easy to clean and resists contamination, making it a preferred choice in food processing, medical equipment, and kitchen appliances.

 

Technical Specifications

  • UNS Number: S30400
  • DIN/EN Designation: 1.4301

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
304-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 304

(USA: AISI, ASTM, UNS)

Country/Region
Standard
Grade/Designation
USA
ASTM
304
European Union
EN 10088-1
X5CrNi18-10 (1.4301)
Germany
DIN
X5CrNi18-10 (1.4301)
UK
BS
304S15, 304S16
Japan
JIS
SUS 304
China
GB/T
0Cr18Ni9
Russia
GOST
08Х18Н10 (08Kh18N10)
Australia
AS
304
India
IS
X04Cr19Ni9 (S30400)
Sweden
SS
2333
France
AFNOR
Z7CN18-09

Corrosion Resistance

  • General Corrosion: 304 stainless steel offers good resistance to many corrosive environments, including atmospheric conditions and many acids and chemicals. It is commonly used in applications where exposure to water, air, and mild acids is expected.
  • Oxidation Resistance: It performs well in oxidizing environments up to about 870°C (1600°F) and can withstand intermittent exposure to higher temperatures.
  • Pitting and Crevice Corrosion: While 304 stainless steel has good resistance to pitting and crevice corrosion, it is not as resistant as some other grades like 316. It can be susceptible to these types of corrosion in chloride-rich environments, such as seawater or saline conditions.
  • Stress Corrosion Cracking: This type of corrosion can occur in high-temperature environments with the presence of chlorides. 304 stainless steel is less resistant to stress corrosion cracking compared to grades like 316 or 317.

Chemical Composition of Stainless Steel Plate 304

Elements
Composition (%)
Carbon (C)
≤ 0.08
Manganese (Mn)
≤ 2.00
Silicon (Si)
≤ 1.00
Phosphorus (P)
≤ 0.045
Sulfur (S)
≤ 0.030
Chromium (Cr)
18.00 – 20.00
Nickel (Ni)
8.00 – 10.50
Nitrogen (N)
≤ 0.10

Physical Properties of Stainless Steel Plate 304

Property
Value
Density
~8.00 g/cm³
Melting Point
~1400 – 1450°C
Thermal Conductivity
~16.2 W/m·K
Electrical Resistivity
~0.72 µΩ·cm
Young’s Modulus
~193 GPa
Poisson’s Ratio
~0.30
Coefficient of Thermal Expansion
~16.0 × 10⁻⁶ /K
Tensile Strength
~520 MPa (min)
Yield Strength
~205 MPa (min)
Elongation
~40% (in 50 mm gauge)
Hardness
~70 HRB

Mechanical Properties of Stainless Steel Plate 304

Property
Value
Tensile Strength
~520 MPa (minimum)
Yield Strength
~205 MPa (minimum)
Elongation
~40% (in a 50 mm gauge length)
Hardness
~70 HRB
Modulus of Elasticity
~193 GPa
Poisson’s Ratio
~0.30
Fatigue Strength
~220 MPa (in air)
Impact Toughness
Excellent, especially at low temperatures

Fabrication Data

  • Cutting: Can be cut using shearing, plasma cutting, or laser cutting techniques. When employing thermal cutting technologies, make sure you have appropriate ventilation.
  • Welding: Suitable for welding with methods such as TIG, MIG, or resistance welding. Use appropriate filler material and follow welding standards to avoid corrosion and maintain strength.
  • Bending/Forming: Can be cold or hot worked. Cold working is preferred for thin plates, while hot working is used for thicker plates to prevent cracking and deformation.
  • Machining: Can be machined using standard machining tools. Use cutting fluids to improve surface finish and tool life.
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