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Stainless Steel 440C, 410, 420, and 430 Round Bars

Stainless Steel 440C, 410, 420, and 430 Round Bars by Riyaarth Overseas in Mumbai

Stainless Steel 440C, 410, 420, and 430 round bars are premium-grade martensitic and ferritic stainless steels designed for applications requiring high strength, excellent wear resistance, and good corrosion protection. These bars are widely used in industries like automotive, aerospace, medical, and manufacturing.

Stainless Steel 440C Round Bars

Stainless Steel 440C is a high-carbon martensitic stainless steel offering the highest hardness and wear resistance among all stainless steels.

Key Features of 440C Round Bars

  • High Hardness: Achieves up to 60 HRC after heat treatment.
  • Wear Resistance: Ideal for abrasive environments.
  • Corrosion Resistance: Performs well in mildly corrosive environments.
  • Toughness: Suitable for high-stress applications.

Applications

  • Cutting tools
  • Bearings
  • Valves and pumps
  • Surgical instruments

Chemical Composition of 440C

Chemical Composition
Element Percentage
Carbon (C) 0.95-1.20
Chromium (Cr) 16.0-18.0
Manganese (Mn) 1.0 (maximum)
Silicon (Si) 1.0 (maximum)
Phosphorus (P) 0.04 (maximum)
Sulfur (S) 0.03 (maximum)

Stainless Steel 410 Round Bars

Stainless Steel 410 is a general-purpose martensitic stainless steel known for its moderate corrosion resistance and high mechanical properties.

Key Features of 410 Round Bars

  • Versatility: Excellent machinability and weldability.
  • Strength: Offers high tensile and yield strength.
  • Corrosion Resistance: Performs well in mild environments.

Applications

  • Fasteners
  • Turbine blades
  • Petrochemical equipment
  • Automotive components

Chemical Composition of 410

Chemical Composition
Element Percentage
Carbon (C) 0.08-0.15
Chromium (Cr) 11.5-13.5
Manganese (Mn) 1.0 (maximum)
Silicon (Si) 1.0 (maximum)
Phosphorus (P) 0.04 (maximum)
Sulfur (S) 0.03 (maximum)

Stainless Steel 420 Round Bars

Stainless Steel 420 is a martensitic stainless steel offering good ductility and excellent corrosion resistance when polished.

Key Features of 420 Round Bars

  • Wear Resistance: Ideal for cutting-edge applications.
  • Corrosion Resistance: Performs well in water and atmospheric conditions.
  • Polishability: Provides a mirror-like finish for decorative applications.

Applications

  • Surgical tools
  • Cutlery
  • Gear shafts
  • Hand tools

Chemical Composition of 420

Chemical Composition
Element Percentage
Carbon (C) 0.15-0.40
Chromium (Cr) 12.0-14.0
Manganese (Mn) 1.0 (maximum)
Silicon (Si) 1.0 (maximum)
Phosphorus (P) 0.04 (maximum)
Sulfur (S) 0.03 (maximum)

Stainless Steel 430 Round Bars

Stainless Steel 430 is a ferritic stainless steel with excellent resistance to oxidation and corrosion, making it suitable for decorative applications.

Key Features of 430 Round Bars

  • Corrosion Resistance: Performs well in mildly corrosive environments.
  • Good Formability: Easy to bend and shape.
  • Magnetic Properties: Retains magnetism, making it suitable for magnetic applications.

Applications

  • Kitchen equipment
  • Automotive trim
  • Decorative hardware
  • Industrial components

Chemical Composition of 430

Chemical Composition
Element Percentage
Carbon (C) 0.12 (maximum)
Chromium (Cr) 16.0-18.0
Manganese (Mn) 1.0 (maximum)
Silicon (Si) 1.0 (maximum)
Phosphorus (P) 0.04 (maximum)
Sulfur (S) 0.03 (maximum)

Mechanical Properties

Stainless Steel Grades Comparison
Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness (HRC)
440C 750-1950 450-1795 10-15 Up to 60
410 415-760 205-380 20 40-50
420 515-740 240-415 20 50-55
430 450-700 200-310 20 35-45

Available Forms

  • Round Bars: Precision-engineered for industrial and structural applications.
  • Flat Bars: Ideal for construction and fabrication needs.
  • Square Bars: Used in machinery and fasteners.
  • Hex Bars: Suitable for precision tooling and fasteners.

Manufacturing Standards

  • ASTM A276: Standard Specification for Stainless Steel Bars and Shapes.
  • ASTM A479: Stainless Steel Bars for Pressure Vessels.
  • ASME SA479: Pressure Vessel Grade Stainless Steel.

Marking & Packaging

  • Marking: Each bar is marked with grade, size, and heat number for full traceability.
  • Packaging: Protected with moisture-resistant materials and securely packed in wooden crates for safe transit.

FAQs

What is the difference between 410 and 430 round bars?

410 is a martensitic grade offering higher strength and moderate corrosion resistance, while 430 is a ferritic grade with better formability and magnetic properties.

Can 440C round bars be heat treated?

Yes, 440C can be heat treated to achieve maximum hardness and wear resistance.

What are the common industries using 420 round bars?

Industries like cutlery, surgical tools, and hand tool manufacturing frequently use 420 round bars.

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