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Steel Round Bars
  • JIS G4051 S40C S43C S45C S48C S50C S55C Chrome Plated Carbon Steel Round Bar
  • JIS G4051 S40C S43C S45C S48C S50C S55C Chrome Plated Carbon Steel Round Bar
  • JIS G4051 S40C S43C S45C S48C S50C S55C Chrome Plated Carbon Steel Round Bar
  • JIS G4051 S40C S43C S45C S48C S50C S55C Chrome Plated Carbon Steel Round Bar
  • JIS G4051 S40C S43C S45C S48C S50C S55C Chrome Plated Carbon Steel Round Bar
  • JIS G4051 S40C S43C S45C S48C S50C S55C Chrome Plated Carbon Steel Round Bar
JIS G4051 S40C S43C S45C S48C S50C S55C Chrome Plated Carbon Steel Round Bar

JIS G4051 S40C S43C S45C S48C S50C S55C Chrome Plated Carbon Steel Round Bar

  • 3 - 9 Tons
    $920
  • >= 10 Tons
    $870

Customization:

Customized logo（Min.Order: 15 pieces）
Customized packaging（Min.Order: 15 pieces）
Graphic customization（Min.Order: 15 pieces）
View product details

JIS G4051 S40C S43C S45C S48C S50C S55C Chrome Plated Carbon Steel Round Bar

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Structural Support & Machining: Designed as free-cutting carbon steel round bars for structural applications, enabling precise machining and fabrication in construction, manufacturing, and engineering.
  • Corrosion Resistance: Chrome plating enhances durability and surface protection, extending service life in corrosive environments.

Key features

  • 1. Material Technology

    • With chrome-plated carbon steel, you can achieve enhanced corrosion resistance compared to uncoated carbon steel alternatives*. The JIS G4051-compliant S40C–S55C grades ensure robust durability for harsh environments.

  • 2. Interactive Design

    • With customizable processing services (cutting, bending, welding), you can adapt the bars to precise project specifications*, offering unmatched flexibility over standard steel products.

  • 3. Performance Parameters

    • With a tight 10% tolerance and hot-rolled precision, you can ensure consistent structural integrity exceeding general steel bars*. The free-cutting steel design reduces machining time by up to 15% compared to non-specialized grades*.

  • 4. Scenario Solutions

    • With JIS-certified structural grading, you can deploy in demanding construction projects where traditional mild steel falls short*. The round shape and angle-cut ends enable seamless integration into machinery and frameworks.

  • 5. Certification Standards

    • With dual JIS and ASTM certification, you can meet international quality standards surpassing non-certified competitors*. The alloy steel composition ensures compliance with safety and performance regulations globally.

Product details

JIS G4051 S40C S43C S45C S48C S50C S55C Chrome Plated Carbon Steel Round Bar

The JIS G4051 S40C-S55C Chrome Plated Carbon Steel Round Bar is a versatile structural steel solution designed for precision engineering and industrial applications. Crafted from high-grade carbon and alloy steel, these rods feature a durable chrome plating, hot-rolled finish, and precise machining tolerances (±10%). Their angle-cut ends and parallel cross-section patterns ensure compatibility with advanced machinery, while compliance with JIS and ASTM standards guarantees reliability in harsh environments.

Technical specifications

FeatureSpecificationApplication Scenario
MaterialChrome-plated carbon steel (S40C-S55C)Corrosion-resistant machinery parts
GradeS40C to S55C (JIS G4051)High-strength structural components
Tolerance±10% (diameter)Precision engineering assemblies
Surface FinishPolished chrome platingAesthetic and functional durability
ProcessingCutting, decoiling, welding, bendingCustom fabrication for machinery parts
Standard ComplianceJIS, ASTMGlobal industrial manufacturing

Customization guide

Adjustable parameters include length (up to 12m), diameter (5-100mm), and surface finish (matte/chrome). For specialized needs, angle-cut ends can be tailored to fit machinery tolerances, while free-cutting properties enable 20% faster machining compared to standard carbon steel.

Get inspired

With JIS-compliant S45C grade steel, you can build robust frameworks for construction equipment. The chrome plating ensures longevity in marine or chemical environments, while precise tolerances simplify integration into automated systems.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Tensile Strength400 MPa+15% (460 MPa)+30% (520 MPa)*
Corrosion Resistance24hrs salt spray72hrs salt spray168hrs salt spray
Surface FinishMatte chromePolished chromeMirror-finish chrome

Supplier's note

  1. Technical Breakthroughs:

    • Material Grades: S45C-S55C offer 30% higher yield strength than S40C, enabling heavier load-bearing applications.
    • Precision Tolerance: ±10% ensures seamless integration into automated machinery.
    • Chrome Plating: Reduces rust formation by 50% compared to uncoated steel, extending service life in corrosive settings.

  2. Optimal Version Selection:

    • Base Model: Ideal for general structural frameworks (e.g., scaffolding) where cost-efficiency is prioritized.
    • Advanced Model: Suited for machinery parts requiring moderate corrosion resistance (e.g., automotive components).
    • Pro Model: Recommended for high-stress environments (e.g., offshore drilling equipment) needing premium strength and aesthetics.

Pro Model’s 520 MPa tensile strength exceeds ASTM A36 standards by 40%, enabling safer use in extreme load scenarios. Pair its mirror finish with chemical-resistant coatings for enhanced durability in food processing facilities.

Frequently asked questions

  • Which JIS G4051 Chrome Plated Carbon Steel Round Bar grade (S40C-S55C) is best for heavy machinery construction?

  • How do I maintain the chrome plating on carbon steel round bars to prevent corrosion?

  • Carbon Steel vs Stainless Steel: Which is better for outdoor structural applications?

  • Can JIS G4051 Chrome Plated Round Bars be customized to specific lengths and diameters?

  • Is the JIS G4051 Chrome Plated Steel Bar ASTM-compliant for international projects?

  • What applications are suitable for JIS G4051 Chrome Plated Carbon Steel Round Bars?

  • What tolerance range does the JIS G4051 Round Bar offer for precision engineering projects?

  • Why is the JIS G4051 Round Bar considered free-cutting steel and what benefits does it offer?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionStructural engineering, machinery partsIndustry Standard: Carbon steel (0.15-0.25% C)
Our Base: S45C (0.45-0.55% C)
Our Advanced: S55C (0.52-0.62% C)		▲ Our Advanced: 18% higher tensile strength (550 MPa vs 490 MPa)
(ASTM A370)		▲ Industry Standard: Lower cost but weaker in corrosive environments
Tolerance PrecisionPrecision machinery, automotive partsIndustry Standard: ±0.2mm
Our Base: ±0.15mm
Our Advanced: ±0.1mm (ISO 286-2)		▲ Our Advanced: 50% tighter tolerance for critical fits
(meets H7/H8 grades)		▲ Industry Standard: Cost-effective but less precise for high-accuracy needs
Surface TreatmentCorrosion-prone environmentsIndustry Standard: Uncoated
Our Base: Zinc-plated (ASTM A153)
Our Advanced: Chrome-plated (ASTM A927)		▲ Our Advanced: 3x longer corrosion resistance in saline environments
(salt spray test: 1000+ hours)		▲ Industry Standard: Prone to rust in humid conditions
Mechanical StrengthHeavy-duty construction, load-bearingIndustry Standard: Yield strength 355 MPa
Our Base: 410 MPa
Our Advanced: 490 MPa (JIS G4051)		▲ Our Advanced: Supports 25% heavier loads in structural applications
(tested per ASTM E8)		▲ Industry Standard: Risk of deformation under extreme stress
Processing FlexibilityCustom fabrication, automotive assemblyIndustry Standard: Limited cutting/bending
Our Base: Cut-to-length + bending
Our Advanced: CNC machining + welding (ISO 9001)		▲ Our Advanced: Full customization for complex geometries
(tolerance ±0.05mm)		▲ Industry Standard: Requires secondary processing for precision parts
Compliance StandardsGlobal manufacturing, export marketsIndustry Standard: Local specs
Our Base: JIS-compliant
Our Advanced: Dual JIS/ASTM certification		▲ Our Advanced: Seamless export to EU/US markets
(ASTM A29 + JIS G4051)		▲ Industry Standard: Risk of rejection in regulated industries

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