Ratnakar Steel India is a premier manufacturer of high-quality **Stainless Steel Square Bars**, widely utilized in structural engineering, heavy machinery, and architectural frameworks. Our square bars are known for their exceptional straightness, sharp corners, and high load-bearing capacity.

Technical Analysis

Our square bars are produced in a variety of finishes, including hot-rolled, cold-drawn, and centerless ground, ensuring they meet the specific tolerance requirements of your project.

  • Size Range: 4mm x 4mm to 100mm x 100mm
  • Material Grades: 304, 304L, 316, 316L, 310S, 410, 420
  • Standard Compliance: ASTM A276, ASTM A479, and EN 10088-3
  • Key Features: High corrosion resistance, excellent weldability, and precise squareness

Stainless Steel Square Bar Technical Data

Size & Geometry
RANGE: 4mm x 4mm to 100mm x 100mm TOLERANCE: H9, h11, h12, k12 (Cold Drawn) SHAPE: Square (4-Sided) CORNERS: Sharp / Radius Corners
Available Grades
AUSTENITIC: 304, 304L, 316, 316L, 316Ti, 321, 347 MARTENSITIC: 410, 416, 420, 431 SPECIAL ALLOY: 17-4PH, Duplex 2205, Super Duplex 2507
Technical Ratings
TENSILE STRENGTH: 515 - 850 Mpa YIELD STRENGTH: 205 - 550 Mpa ELONGATION: 15% to 40% (Grade Specific)
Surface Finish & Condition
FINISH: Bright, Cold Drawn, Hot Rolled, Pickled, Shot Blasting EDGE FINISH: Smooth Edge, Sand Blasted CONDITION: Solution Annealed, Hardened & Tempered
Key Applications
Structural Frameworks Machine Parts & Shafts Architectural Grills & Railings Kitchen Equipment & Furniture
Testing & Compliance
STANDARDS: ASTM A276, ASTM A479, EN 10088-3 INSPECTION: Visual, Dimensional, Ultrasonic (UT) DOCUMENTATION: MTC as per EN 10204 3.1

Our Manufacturing Process

Our production process ensures that every square bar maintains uniform structural integrity from core to surface, making them reliable for heavy-duty industrial use.

01. Grade Selection

Selecting premium billets (304/316/410) based on specific tensile and corrosion needs.

02. Square Forming

Precision cold-drawing or hot-rolling to achieve exact 90-degree square corners.

03. Quality Audit

Rigorous ultrasonic testing and dimensional checks to ensure zero-defect bars.