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Product Details: 304 Stainless Steel Hex Bar
The 304 stainless steel hex bar is a high-performance, corrosion-resistant alloy engineered to meet the rigorous demands of industrial, architectural, and marine applications. Renowned for its balanced composition of chromium, nickel, and carbon, this hexagonal bar offers unmatched durability, machinability, and aesthetic versatility. In this comprehensive guide, we delve into its technical specifications, mechanical properties, manufacturing processes, and real-world applications, ensuring your project benefits from material excellence.
Category | Details |
---|---|
Standard Grades | ASTM A276/A479, UNS S30400, EN 1.4301, JIS SUS304 |
Hardness | 150–200 HV (Annealed), 300–350 HV (Cold Drawn), 40–45 HRB (Rockwell B Scale) |
Dimensions | Across Flats: 3mm–150mm (1/8″–6″) Length: 1m–6m (Customizable up to 12m) |
Physical Properties | Density: 8.0 g/cm³ Melting Point: 1400–1450°C Thermal Expansion: 17.3 µm/m·K (20–100°C) |
Manufacturing Processes | Hot Rolling, Cold Drawing, Solution Annealing, Pickling, Polishing |
Surface Finish Options | Mill Finish, Bright Polished, Sandblasted, Pickled/Oxide-Free |
The 304 stainless steel hex bar delivers a minimum tensile strength of 515 MPa (75,000 psi) and a yield strength of 205 MPa (30,000 psi). This exceptional strength-to-weight ratio makes it ideal for:
The alloy’s ductility (40–50% elongation at break) allows for complex machining, cold forming, and welding without cracking or brittleness.
With a minimum bend strength of 210 MPa (30,000 psi), the stainless steel hex bar maintains structural integrity under repetitive stress. This property is vital for:
Cold-drawn bars exhibit enhanced bend strength due to strain hardening during manufacturing.
Authentic 304 stainless steel hex bars are verified through:
For critical applications, specify Low-Carbon 304L (0.03% max C) to prevent carbide precipitation during welding.
The weight of a 304 stainless steel hex bar is calculated using the formula:
\text{Weight (kg)} = \frac{{\text{Across Flats (mm)}^2 \times \text{Length (m)} \times 0.0068}}
Example: A 30mm hex bar measuring 5m weighs 302×5×0.0068=30.6kg.
For imperial measurements:
\text{Weight (lbs/ft)} = \frac{{\text{Across Flats (in)}^2 \times 0.2833}}
This predictability streamlines inventory management and shipping cost estimations.
Although 304 stainless steel is highly corrosion-resistant, certain conditions can compromise its passive oxide layer:
Billets heated to 1200°C are shaped into hexagonal profiles, enhancing grain structure for superior toughness and fatigue resistance.
Precision drawing through tungsten carbide dies achieves tight tolerances (±0.05mm) and smooth surfaces, ideal for high-speed machining.
Heated to 1050–1100°C and rapidly quenched to dissolve carbides, ensuring optimal corrosion resistance and mechanical properties.
Sector | Use Cases |
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Oil & Gas | Valve stems, drill collars, and pipeline fittings resistant to sour gas. |
Food Processing | Mixing blades, conveyor shafts, and storage tanks (FDA/EHEDG compliant). |
Renewable Energy | Solar panel brackets, wind turbine bolts, and hydroelectric components. |
Architecture | Sculptural elements, staircase railings, and façade cladding. |
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