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  • 304 Stainless Steel Plate

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304 Stainless Steel Plate
304 stainless steel is the most versatile and widely used austenitic chromium-nickel stainless steel. Its excellent corrosion resistance, good formability, and ease of cleaning make it suitable for a vast array of applications. 304 plate offers a balanced combination of strength and ductility and can be used in a variety of environments, from mild chemicals to food processing.
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◉ PRODUCT SPECIFICATION


1. Standard Designations


  • UNS: S30400

  • ASTM: A240/A240M

  • EURONORM: 1.4301

  • JIS: SUS 304

  • GB/T: 06Cr19Ni10 (Old designation: 0Cr18Ni9)


2. Chemical Composition (% by weight)


Element

Carbon (C)

Silicon (Si)

Manganese (Mn)

Phosphorus (P)

Sulfur (S)

Chromium (Cr)

Nickel (Ni)

Nitrogen (N)

Min.

-

-

-

-

-

18.00

8.00

-

Max.

0.07

0.75

2.00

0.045

0.030

20.00

10.50

0.10


3. Mechanical Properties (at Room Temperature, for Annealed Condition)


Property

Yield Strength (0.2% Offset)

Tensile Strength

Elongation (in 2")

Hardness (Brinell)

Hardness (Rockwell B)

Value

≥ 205 MPa (30 ksi)

≥ 515 MPa (75 ksi)

≥ 40%

≤ 201 HBW

≤ 92 HRB


4. Physical Properties (Typical)


Property

Value

Density

8.00 g/cm³ (0.289 lb/in³)

Melting Range

1400 - 1450 °C (2550 - 2650 °F)

Modulus of Elasticity

193 GPa (28 x 10⁶ psi)

Thermal Conductivity (100°C)

16.2 W/m·K

Coefficient of Thermal Expansion (20-100°C)

17.3 x 10⁻⁶ /K


5. Corrosion Resistance


  • General Corrosion: Excellent resistance to a wide range of atmospheric environments and many corrosive media, particularly in the food and beverage industry.

  • Pitting/Corrosion Resistance: Good resistance to mildly corrosive environments. Its Pitting Resistance Equivalent Number (PREN) is ~19.

  • Intergranular Corrosion: In the annealed condition, it resists corrosion from most oxidizing acids. Sensitization (precipitation of chromium carbides at grain boundaries) can occur after exposure to 425-815°C (800-1500°F), which may lead to intergranular corrosion in certain environments.


6. Available Product Range (Plates)


Parameter

Standard Range (May vary by supplier)

Thickness

0.5 mm (0.02") to 100 mm (4") and above

Width

1000 mm (39"), 1219 mm (48"), 1500 mm (59"), 2000 mm (79"), etc.

Length

2000 mm (79"), 2438 mm (96"), 3000 mm (118"), 6000 mm (236"), etc.

Common Surface Finishes

No. 1: Hot-rolled, annealed & pickled (dull, matte)
2B: Cold-rolled, annealed & pickled, then skin-pass rolled (smooth, slightly reflective)
BA: Bright Annealed (smooth, highly reflective)
No. 4: Brushed (directional satin)
No. 8: Mirror (highly reflective polish)


7. Typical Applications


  • Food & Beverage: Processing equipment, brewing tanks, kitchens.

  • Architectural: Wall cladding, decorative elements.

  • Chemical: Tanks and pressure vessels for mild corrosives.

  • Pharmaceutical: Process equipment requiring easy sterilization.

  • Marine: Components in non-saltwater environments.

  • Automotive: Exhaust systems, trim (specific grades).

◉ Surfcae selection

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SURFACE CHARACTERISTIC SUMMARY OF MANUFACTURING METHOD APPLICATION
NO.1 Silvery white Hot rolled to specified thickness Do not need to have a glossy surface use
lackluster
NO.2D Silvery white After cold rolling, heat treatment and pickling are carried out General material, deep material
NO.2B Gloss is stronger than No.2D After No.2D treatment, the final light cold rolling is carried out through the polishing roller The general material
BA As bright as a sixpence No standard, but usually a bright annealed surface with high reflectivity. Building materials, kitchen utensils
NO.3 Rough lapping Grind with 100~200# (unit) strop tape Building materials, kitchen utensils
NO.4 Intermediate grinding Polished surface obtained by grinding with 150~180# strop abrasive tape Building materials, kitchen utensils
NO.240 Fine lapping Grinding with 240# strop abrasive tape kitchenware
NO.320 Very fine grinding Grinding was carried out with 320# strop abrasive tape kitchenware
NO.400 The luster is close to BA Use 400# polishing wheel to grind General timber, building timber, kitchen appliances
HL Hairline grinding Suitable particle material for hair stripe grinding (150~240#) with many grains Building, construction material
NO.7 It's close to mirror grinding Use a 600# rotary polishing wheel to grind For art or decoration
NO.8 Mirror ultrafinish The mirror is ground with a polishing wheel Reflector, for decoration

◉ PRODUCTION AND WAREHOUSING

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