Stainless Steel Square Bars

Stainless steel square bars are solid bars with a square cross-section. They are manufactured through hot or cold rolling processes, followed by annealing and pickling to improve their properties. These bars are known for their excellent strength, toughness, and resistance to corrosion and oxidation.


StandardGB, AISI/JIS, SUS, UNS, DIN 17440 17220(BS970 Part4)

201 202 204 207 207CU 301 302 303 303B 304 304L 304N 308 308L 308 LSI 309

309L 309LSI 309S 309SI 310 310S 314 316 316L 316LSI 321 330 347 348 384 410 420 430 416 660 718

Length3000mm, 6000mm or according to the customer\\\’s requirement.
Place of OriginShandong
TypeRound bar, square bar, flat bar, hexagon bar, angle bar, channel bar, threaded bar

Petroleum, chemical, construction, textile, medicine, aviation, aerospace, railway,

highway, landscape protection, metallurgical machinery and other industries.

SurfaceBright, Pickled, Black
TechniqueForged/Hot Rolled/Cold Drawn/Peeled

Round bar: 1. Hot rolled black bar: (5-400)x6000mm or according to your requirement.

2. Acid round bar: (5-400)x6000mm or according to your requirement.

3. Cold drawn bright bar: (1-20)x6000mm or according to your requirement.

4. Polishing round bar: (5-400)x6000mm or according to your requests.

Typical Chemistry:

The chemical composition of stainless steel square bars varies depending on the grade. Common grades and their compositions include:

  • Austenitic Stainless Steels (e.g., 304, 316):

    • Iron (Fe): Balance
    • Chromium (Cr): 16-18% (304), 16-18% (316)
    • Nickel (Ni): 8-10.5% (304), 10-14% (316)
    • Manganese (Mn): Up to 2%
    • Silicon (Si): Up to 1%
    • Carbon (C): 0.08% max (304), 0.08% max (316)
    • Molybdenum (Mo) (in 316): 2-3%
  • Martensitic Stainless Steels (e.g., 410, 420):

    • Iron (Fe): Balance
    • Chromium (Cr): 12-14% (410), 12-14% (420)
    • Carbon (C): 0.15% max (410), 0.15% max (420)
    • Manganese (Mn): Up to 1%
    • Silicon (Si): Up to 1%
  • Duplex Stainless Steels (e.g., 2205):

    • Iron (Fe): Balance
    • Chromium (Cr): 22-23%
    • Nickel (Ni): 4.5-6.5%
    • Molybdenum (Mo): 3-3.5%
    • Manganese (Mn): Up to 2%
    • Silicon (Si): Up to 1%

Physical Properties:

The physical properties of stainless steel square bars depend on the grade and processing. Typical properties include:

  • Density: Approximately 7.8 g/cm³
  • Tensile Strength:
    • Austenitic: 520-750 MPa
    • Martensitic: 600-750 MPa
    • Duplex: 620-880 MPa
  • Yield Strength:
    • Austenitic: 210-450 MPa
    • Martensitic: 240-400 MPa
    • Duplex: 450-600 MPa
  • Elongation:
    • Austenitic: 40-60%
    • Martensitic: 15-30%
    • Duplex: 20-30%
  • Hardness:
    • Varies by grade and condition (e.g., annealed, hardened)
  • Corrosion Resistance: Excellent, especially in austenitic and duplex grades
  • Thermal Conductivity: Lower than carbon steel
  • Magnetic Properties: Non-magnetic (austenitic), magnetic (martensitic and some duplex)


Key features of stainless steel square bars include:

  • Corrosion Resistance: Exceptional resistance to rust and corrosion, making them ideal for harsh environments and corrosive media.
  • Strength and Durability: High tensile and yield strength provide excellent structural integrity, ensuring long service life.
  • Heat Resistance: Good performance at high temperatures, particularly in grades like 304, 316, and 410.
  • Workability: Excellent formability and machinability, allowing for complex shapes and structures.
  • Aesthetic Appeal: Attractive surface finishes available in various grades and textures.
  • Hygiene: Easy to clean and maintain, making them suitable for food, beverage, and medical applications.
  • Low Maintenance: Requires minimal upkeep due to its corrosion resistance and durability.
  • Versatility: Suitable for a wide range of applications, from industrial to decorative.
  • Recyclability: Environmentally friendly, as stainless steel can be fully recycled.
  • Magnetic Properties: Varies by grade, allowing for specific applications requiring magnetic or non-magnetic properties.

Our Certifications

Packaging and Shipping

1. Wood pallet packing cover with water-proof paper
2. Steel pallet packing cover with water-proof paper
3. Wood box packing
4. Steel pallet packing cover with steel box
5. In bundles with steel strip no extra packing

package and shipment


  • High Precision Dimension: The carbon steel profile has excellent processing technology good molding and easy welding. Thickened material, stable performance, and high hardness, not easy to rust.
  • Low Friction: Low dissipation factor. More durable than most ordinary domestic bearings. Lower operating costs​
  • Life Is Long: High-quality steel through strict quality inspection, quality control layer-by-layer detection, and reliable quality, long service life.
  • Customization: Drawings and samples can be processed and customized. Conventional large-scale spot, non-standard customization.
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