Carbon Steel ST 52 Round Bars & Rods

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Carbon Steel ST 52 Explained

Carbon Steel ST 52 is a high-strength structural carbon steel grade. To begin with, it is widely used for applications requiring superior tensile strength, good toughness, and reliable performance under load. Furthermore, manufactured in accordance with DIN standards (commonly DIN 17100), ST 52 is characterized by its higher yield and tensile strength compared to standard mild steels — while still maintaining good weldability and formability.

Why do structural engineers and fabricators choose ST 52 for demanding projects? First and foremost, its balanced chemical composition allows it to be easily fabricated through cutting, bending, and welding without complex heat treatment requirements — reducing production time and costs. In addition, it offers excellent load-bearing capability, good impact resistance, and uniform mechanical properties, ensuring reliable performance in heavy-duty applications. Moreover, its cost-effectiveness and wide availability make it a practical choice for projects with budget considerations.

Consequently, Carbon Steel ST 52 is commonly used in construction frameworks, machine structures, and pressure components. Furthermore, it is also trusted in shafts, fabricated assemblies, and heavy engineering projects. Equally important, its combination of strength, weldability, and versatility makes it a preferred choice for industries demanding strong, reliable, and cost-effective structural steel solutions.

Need premium Carbon Steel ST 52 round bars for your structural project? Contact our technical team today — we’ll help you select the right size and specifications for your requirements, and provide a competitive quote tailored to your needs.

Other Types of Carbon Steel ST 52 Round Bars

Carbon Steel ST 52 Square Bar
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Carbon Steel ST 52 Square Bar
  • High-strength square bars manufactured from ST 52 carbon steel
  • Higher yield strength compared to standard mild steel grades
  • Good weldability and structural stability
  • Used in construction, machinery frames, and heavy fabrication
Carbon Steel ST 52 Hex Bar
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Carbon Steel ST 52 Hex Bar
  • Hexagonal bars offering better torque handling
  • Manufactured from high-yield ST 52 structural steel
  • Good machinability for fasteners and engineered parts
  • Commonly used in mechanical and industrial assemblies
Carbon Steel ST 52 Rectangular Bar
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Carbon Steel ST 52 Rectangular Bar
  • Rectangular bars designed for high-load structural use
  • Uniform mechanical properties and strength distribution
  • Available in standard and custom-cut dimensions
  • Used in bridges, platforms, and heavy-duty structures
Carbon Steel ST 52 Flat Bar
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Carbon Steel ST 52 Flat Bar
  • Flat bars with higher tensile strength and durability
  • Manufactured from ST 52 structural carbon steel
  • Ideal for base plates, brackets, and support components
  • Supplied in mill finish or cut-to-length form
Carbon Steel ST 52 Bright Bar
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Carbon Steel ST 52 Bright Bar
  • Bright drawn bars with improved surface quality
  • Better dimensional accuracy for machining operations
  • Consistent mechanical performance across the bar
  • Used in shafts, pins, and precision components
Carbon Steel ST 52 Forged Bar
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Carbon Steel ST 52 Forged Bar
  • Forged bars with refined grain and enhanced strength
  • Excellent resistance to impact and fatigue loading
  • Reliable performance in high-stress environments
  • Preferred for heavy engineering and industrial applications

CARBON STEEL ST 52 ROUND BAR EQUIVALENT GRADES

STANDARD DIN EN ASTM IS
Carbon Steel ST 52 DIN 17100 ST 52 EN 10025 S355JR ASTM A572 Gr 50 IS 2062 E350

SPECIFICATION OF CARBON STEEL ST 52 ROUND BAR

Size22 mm up to 800 mm
Thickness1 – 2 inch
Length3 meter, 6 meter
Form Carbon Steel Round, Hex, Flat, Half Round, Oval, Rectangular in Black & Bright Finish

CHEMICAL COMPOSITION OF CARBON STEEL ST 52 ROUND BAR

Carbon Steel C Si Mn P S Cu N
ST 52 0.22 max 0.55 max 1.60 max 0.030 max 0.030 max 0.55 max 0.012 max

MECHANICAL PROPERTIES OF CARBON STEEL ST 52 ROUND BAR

Steel Grade Material No. The Final Delivery Condition (No less than)
Cold Drawn (BK1) Cold Drawn Soft (BKW1) Cold Drawn & Stress Relieved (BKS) Annealed (GBK1) Normalizing (NBK1)
RmA5 RmA5 RmReHA5 RmA5 RmReH2A5
N/mm²% N/mm²% N/mm²N/mm²% N/mm²% N/mm²N/mm²%
ST 52 1.0580 6404 5807 58042010 49022 490 – 63035522

💡 Practical Difference in Use

Use Carbon Steel ST 52 Round Bars when: higher strength, good toughness, and reliable load-bearing performance are required for structural and engineering applications. ST 52 is a high-yield structural carbon steel suitable for applications where durability and weldability are important along with economical material cost. → Example: structural supports, shafts, tie rods, machine frames, and fabricated components.


Bright Finished / Machined Carbon Steel ST 52 Round Bars when: improved surface finish, closer dimensional accuracy, and ease of machining are required for engineered parts. → Example: machined shafts, pins, bolts, rollers, and precision structural components.

Applications of Carbon Steel ST 52 Round Bars

Carbon Steel ST 52 round bars are selected for applications where higher tensile strength and dependable structural performance are more critical than corrosion resistance.

  • Construction & Infrastructure: Structural columns, supports, anchor rods, and base plates.
  • General Engineering: Shafts, pins, brackets, and load-bearing machine parts.
  • Manufacturing & Fabrication: Welded structures, frames, and heavy-duty assemblies.

When to Choose Carbon Steel ST 52 Round Bars?

Material selection depends on strength requirements, fabrication needs, machining operations, and overall project cost.

Choose Carbon Steel ST 52 Round Bars when:

  • Higher yield and tensile strength are required than mild steel
  • Good weldability and structural stability are needed
  • Cost-effective high-strength material is preferred
  • Used in construction and general engineering
  • Cutting, bending, and fabrication are involved
  • Static and moderate dynamic loads are present

Bright / Machined Carbon Steel ST 52 Round Bars are preferred when:

  • Tighter dimensional tolerances are required
  • Smoother surface finish improves fit or performance
  • Machining operations such as turning or drilling are needed
  • Uniform quality is important for fabrication
  • Used in shafts, fasteners, and mechanical assemblies
  • Consistent surface condition is required

Industries That Use Carbon Steel ST 52 Round Bars

Carbon Steel ST 52 round bars are widely used in industries that demand higher strength, ease of fabrication, and economical structural solutions.

Construction & Infrastructure

Used in load-bearing and structural applications.

Uses

Columns, supports, anchor rods, base plates.

Why Carbon Steel ST 52?

Higher strength, good weldability, and cost efficiency.

General Engineering

Used in fabricated and machined components.

Uses

Shafts, pins, brackets, couplings.

Why Carbon Steel ST 52?

Reliable mechanical properties and easy machining.

Manufacturing & Fabrication

Used in welded frames and assemblies.

Uses

Machine frames, structural parts, supports.

Why Carbon Steel ST 52?

Consistent quality, availability, and structural strength.

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Looking for high-quality Carbon Steel ST 52 Round Bars & Rods? Our products are manufactured in compliance with DIN 17100 standards, with equivalents meeting ASTM A572 Grade 50 and EN S355JR specifications. Get in touch with us today.

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