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304 Stainless Steel Angle Bar

Manufactured in accordance with GB/T 706-2016, equivalent to 06Cr19Ni10 austenitic stainless steel

It offers excellent corrosion resistance, formability, and weldability. Its chromium-nickel alloy composition (Cr 18–20%, Ni 8–10%) forms a passive film, making it suitable for construction structures, machinery manufacturing, and decorative engineering. Non-magnetic at room temperature, it can be strengthened by cold working.

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  • Outstanding Corrosion Resistance

    Excellent resistance in atmospheric, freshwater, and mild acid-alkali environments; ≥500 hours in salt spray testing without rust spots.

  • Balanced Strength and Toughness

    Tensile strength ≥520 MPa, elongation ≥40%, capable of withstanding bending, stamping, and other forming processes.

  • Excellent Machinability and Weldability

    Compatible with TIG and MIG welding processes; no preheating required; compatible with 304/316 stainless steel weldments.

Product Specifications

Chemical Composition (GB/T 1220-2007)
   
Element C≤ Si≤ Mn≤ P≤ S≤ Cr Ni
Content (%) 0.07 1 2 0.035 0.03 18.0-20.0 8.0-10.5
Physical & Chemical Properties
Physical Properties
  • Density: 7.93 g/cm³ (same as 304 plate, convenient for structural weight calculations)
  • Melting Point: 1398–1454 °C, better high-temperature structural stability than carbon steel, suitable for ≤400 °C service
  • Thermal Conductivity: 16 W/(m·K) at 20 °C, about one-third of carbon steel, suitable for heat insulation applications
  • Coefficient of Thermal Expansion: 17.2×10⁻⁶/°C (0–100 °C), close to concrete for good thermal stress compatibility during assembly
Mechanical Properties (Annealed):
Property Value Reference Standards
Tensile Strength ≥520 MPa GB/T 1220-2007
Yield Strength ≥205 MPa GB/T 1220-2007
Elongation  ≥40% GB/T 1220-2007
Hardness (HB) ≤187 GB/T 231.1-2009
Chemical Properties:
  • Corrosion Resistance: Excellent in atmospheric, freshwater, and food-grade media (e.g., citric acid solution); ≥500 hours in salt spray testing without rust spots
  • Intergranular Corrosion Resistance: With C ≤0.07%, low risk under normal service; during welding, control heat input ≤15 kJ/cm and avoid prolonged exposure to sensitization range (450–850 °C)
Specifications & Supply Dimensions
Specifications & Supply Dimensions 
Section Dimensions (Equal Angle Steel as Example, GB/T 706-2016)
Side Length (mm) Thickness (mm) Theoretical Weight (kg/m) Tolerance Range
20×20 3 0.889 Side length ±0.8 mm
50×50 5 3.77 Thickness ±0.4 mm
100×100 8 11.92 Perpendicularity ≤1°
200×200 24  88.2 Flatness ≤1.5 mm/m
Length Options
Standard Lengths 6 m, 9 m, 12 m (commonly stocked)
Custom Cutting Available from 1 m up to 12 m with a cutting tolerance of ±5 mm
Minimum Order Quantity (MOQ) ≥50 kg for standard sizes; ≥200 kg for customized specifications
Surface Finishes
Hot Rolled Black (NO.1) Surface with oxide scale, suitable for subsequent machining processes such as drilling and welding
Pickled and Passivated Surface roughness Ra ≤50 μm, corrosion resistance improved by 30%, ideal for humid environments
Cold Drawn Bright Surface roughness Ra ≤1.6 μm, suitable for direct use in decorative applications such as railings and handrails

Pricing Calculation

Workshop & Manufacturing Machine

Stainless Steel Profiles on Storage Racks

Spectrometer for Alloy Composition Analysis

Profile Weighing with Crane Scale

Factory Stacking of Stainless Steel Profiles

Packaged Stainless Steel Profiles for Shipment

Worker Loading Profiles onto Truck

Product Applications

  • Construction

    Typical Size (mm): 75×75×6 Application Description: Structural steel supports, curtain wall frameworks, roof purlins Case Reference: Canopy support for a shopping mall (Q235 replacement, service life extended 5 times)

  • Machinery Manufacturing

    Typical Size (mm): 100×100×10 Application Description: Equipment frames, guide rail supports, conveyor line supports Case Reference: Food production line frame (passed juice corrosion resistance test)

  • Decorative Engineering

    Typical Size (mm): 30×30×3 Application Description: Interior railings, door and window frames, curtain wall decorative trims Case Reference: Hotel lobby spiral staircase handrails (BA surface finish)

  • Chemical Equipment

    Typical Size (mm): 150×150×12 Application Description: Corrosion-resistant brackets, pipe clamps, reactor supports Case Reference: Ethanol distillation equipment support in a pharmaceutical plant (resistant to organic solvents)

Additional Information

Heat Treatment Recommendation

Solution Treatment: 1010–1150 °C, hold for 30 min, then water quench to relieve processing stress and restore intergranular corrosion resistance

Welding Guidelines

  • Recommended TIG welding with ER308L wire (φ2.0–3.2 mm)
  • Welding current: 100–150 A, interpass temperature ≤150 °C
  • Pre-weld cleaning: Remove oil and rust
  • Post-weld: Pickle & passivate (20% HNO₃ + 5% HF solution, 15 min immersion)

Stock & Delivery

  • Regular sizes (50×50×5 mm, 100×100×8 mm): ≥50 tons in stock, dispatch within 24 hours
  • Customized profiles (e.g., unequal angle 125×75×10 mm): Lead time 7–10 days, supplied with mill test certificate (including spectrochemical analysis report)

Comparative Advantages

  • Versus Q235 Carbon Steel Angle: 10× corrosion resistance, 60% lower maintenance cost, ideal for humid or mildly corrosive environments
  • Versus 316 Angle: 30% lower cost, more cost-effective in non-chloride environments (e.g., freshwater, food industry)

FAQ

What is a 304 stainless steel angle bar used for?

It is used for structural support, frames, and reinforcement in various industrial and architectural applications.

What advantages does 304 angle bar offer?

Good corrosion resistance, formability, and ease of fabrication.

What environments are suitable for 304 angle bars?

Indoor and outdoor environments with mild to moderate corrosion exposure.

Can 304 stainless steel angle bars be welded or machined?

Yes. They are easy to weld, cut, and machine.

Are custom sizes available for angle bars?

Yes. Custom leg sizes, thicknesses, and lengths are supported.

Need more details on stainless steel products? Feel free to contact Walmay anytime.

Walmay will help match the right stainless product form and specification for your application, confirm quantities and packing needs, and provide requested documents based on order requirements.

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