Selecting the right material for industrial applications can make a huge difference in terms of performance, durability, and cost efficiency. Among the many stainless steel grades available, SS 316 Square Bars are one of the most reliable choices. These bars are crafted from stainless steel 316, an alloy known for its excellent resistance to corrosion, high strength, and superior performance in demanding conditions.
SS 316 Square Bars are manufactured in a square cross-section, which offers uniform strength and easy integration into structural and mechanical applications. Their robust properties make them widely useful in industries such as construction, automotive, marine, chemical processing, oil and gas, and food processing.
This blog covers everything about stainless steel 316 square bars—their composition, mechanical properties, advantages, applications, manufacturing process, finishes, and pricing.
Composition of SS 316 Square Bars
The properties of SS 316 Square Bars are a direct result of their composition. Grade 316 stainless steel contains molybdenum, which significantly improves its corrosion resistance compared to 304 stainless steel.
Typical Chemical Composition:
Chromium (Cr): 16–18%
Nickel (Ni): 10–14%
Molybdenum (Mo): 2–3%
Carbon (C): ≤ 0.08%
Manganese (Mn): ≤ 2%
Silicon (Si): ≤ 0.75%
Phosphorus (P): ≤ 0.045%
Sulfur (S): ≤ 0.03%
Iron (Fe): Balance
This blend of elements provides excellent pitting resistance, particularly in chloride-rich environments like seawater.
Properties of SS 316 Square Bars
SS 316 Square Bars exhibit outstanding mechanical, physical, and corrosion-resistant properties, making them ideal for heavy-duty applications.
Mechanical Properties
Tensile Strength: 515 MPa minimum
Yield Strength: 205 MPa minimum
Elongation: 40%
Hardness: 217 Brinell max
Physical Properties
Density: 8.0 g/cm³
Melting Range: 1371–1399 °C
Elastic Modulus: 193 GPa
Thermal Conductivity: 16.3 W/m·K
Corrosion Resistance
Withstands corrosive chemicals, chlorides, and saltwater
Excellent resistance to stress corrosion cracking
Superior pitting resistance compared to SS 304
Workability
Good machinability with standard tools
Weldable by most fusion and resistance techniques
Maintains strength and toughness after welding
Advantages of SS 316 Square Bars
Excellent Corrosion Resistance – Performs well in marine, chemical, and acidic environments.
High Strength and Durability – Withstands heavy loads and high-pressure conditions.
Heat Resistance – Maintains performance at elevated temperatures.
Versatility – Suitable for multiple industries and applications.
Low Maintenance – Requires minimal upkeep, reducing lifecycle costs.
Hygienic Properties – Preferred for food, beverage, and pharmaceutical applications.
Aesthetic Appeal – Available in polished finishes for architectural uses.
Applications of SS 316 Square Bars
Due to their durability and strength, SS 316 Square Bars are applied in several industries.
1. Construction and Infrastructure
Structural frameworks
Bridges and high-rise reinforcements
Handrails and balustrades
2. Marine Industry
Shipbuilding and docks
Offshore oil platforms
Marine fasteners and shafts
3. Chemical and Petrochemical Plants
Chemical storage tanks
Pressure vessels
Heat exchangers and pipelines
4. Food and Beverage Industry
Processing machinery
Conveyor supports
Dairy and brewery systems
5. Automotive and Aerospace
Shafts, axles, and fasteners
Engine components
Exhaust systems
6. Medical and Pharmaceutical
Surgical equipment
Orthopedic implants
Cleanroom supports
Manufacturing Process of SS 316 Square Bars
The production of SS 316 Square Bars involves several steps to achieve precision and durability.
Raw Material Selection – Premium stainless steel 316 alloy is chosen.
Melting and Casting – Alloy melted and cast into billets.
Hot Rolling – Billets rolled into square sections under high temperatures.
Heat Treatment – Annealing process enhances toughness and corrosion resistance.
Cold Finishing – Bars are polished or pickled for smooth surfaces.
Testing and Inspection – Bars tested for quality, strength, and dimensional accuracy.
Cutting and Packaging – Final products cut to required lengths and prepared for shipment.
Available Surface Finishes
SS 316 Square Bars are offered in different finishes depending on application needs:
Bright Finish – Smooth, polished look suitable for architectural use.
Black Finish – As-rolled appearance, ideal for industrial applications.
Pickled Finish – Acid-cleaned for enhanced corrosion resistance.
Mirror Finish – Highly reflective for hygienic and decorative use.
Standards and Specifications
SS 316 Square Bars comply with international standards to ensure quality:
ASTM: A276, A479
ASME: SA276, SA479
DIN: 1.4401 / 1.4436
JIS: SUS 316
Size Range: 4 mm to 150 mm, lengths up to 6 meters (custom options available).
SS 316 vs SS 304 Square Bars
| Feature | SS 316 Square Bars | SS 304 Square Bars |
|---|---|---|
| Corrosion Resistance | Superior (with Mo) | Good but less in chlorides |
| Marine Suitability | Excellent | Limited |
| Price | Higher | Lower |
| Applications | Marine, chemical, oil & gas | Construction, kitchenware |
| Strength | High | Moderate |
Factors to Consider When Purchasing
Confirm sizes and tolerances required.
Select the appropriate surface finish.
Ensure compliance with international standards.
Buy from a reliable SS 316 Square Bar supplier.
Compare prices per kg and availability.
Ask for material test certificates for quality assurance.
SS 316 Square Bar Price in India
The price of SS 316 Square Bars varies depending on size, finish, and supplier. On average:
Small sizes: ₹250 – ₹300 per kg
Medium sizes: ₹280 – ₹350 per kg
Large sizes: ₹300 – ₹400 per kg
For bulk projects, always request a custom quotation for the best rates.
Maintenance Guidelines
Clean bars regularly to prevent contamination.
Avoid exposure to unnecessary strong chemicals.
Apply passivation for extra resistance in harsh environments.
Store in dry, ventilated spaces.
Conclusion
SS 316 Square Bars are among the most dependable stainless steel products available today. With their exceptional corrosion resistance, strength, and durability, they are well-suited for industries ranging from construction and marine to chemical processing and food production.
Their ability to withstand harsh conditions makes them more reliable than SS 304, particularly in environments exposed to seawater and chlorides. By sourcing SS 316 Square Bars from a trusted manufacturer and supplier in India, businesses can ensure quality, performance, and long service life.
