At MWaolloys, we manufacture and supply premium carbon steel round bars designed for reliability, machinability, and long-term performance in diverse industrial applications. These bars are the backbone of modern infrastructure, supporting construction, automotive, oil & gas, and machinery sectors worldwide. With precision-crafted diameters and strict adherence to global standards, our carbon steel bars deliver excellent strength-to-weight ratios, cost-efficiency, and weldability.

What is Carbon Steel Round Bar

Carbon steel round bars are solid cylindrical metal rods made primarily of iron and carbon, typically with trace elements of manganese, silicon, and sulfur. These bars serve a crucial role in structural frameworks, machine parts, shafts, bolts, fasteners, and general fabrication tasks.

At MWaolloys, we focus on delivering carbon steel bars that conform to ASTM A36, A105, A529, AISI 1018, 1045, 1050, 1060, and many other global specifications. Our bars are trusted globally for their exceptional mechanical performance and tight tolerance control.

Did you know? According to the World Steel Association, over 1.9 billion tonnes of steel were produced globally in 2023, with carbon steel round bars representing a significant volume used in secondary manufacturing.

Chemical Composition and Mechanical Properties

Carbon content directly affects hardness, ductility, and weldability. The following table summarizes the typical chemical and mechanical parameters of our popular carbon steel grades:

Table 1: Typical Chemical Composition

Table 2: Mechanical Properties (as rolled)

These properties vary based on heat treatment and manufacturing process.

Manufacturing Standards and Grades

We manufacture in accordance with the following international standards:

• ASTM A36 / A529 / A108 – Common U.S. construction and machining grades.

• EN 10083 – European standards for medium carbon steels.

• JIS G4051 (S45C, S20C) – Japanese standards.

• ISO 683-1 – Global material properties.

• DIN 17200 (C45, CK45) – German norm for round bar tolerances.

Every bar comes with a mill test certificate (MTC 3.1/3.2) and chemical analysis report, ensuring full traceability.

Carbon Steel Bar Specification

Chemical Composition for Carbon Steel Round Bars, Carbon Steel Rods

Types of Carbon Steel Bar

Weights of Carbon Steel Round Bars Per Linear Foot

Carbon Steel Round Bars Weight Chart

Carbon Steel Round Bar Sizes

Carbon Steel Bars Standard lengths of 2000 mm up to 6000 mm. Cut to size on request (tolerance +2/-0 mm).

Advantages vs. Other Materials

Compared to stainless steel, carbon steel is more affordable, easier to machine, and offers sufficient strength for 80% of structural applications.

Material Comparison

If corrosion is not the primary concern, carbon steel remains the top choice for engineering and structural solutions.

Global Price Comparison 2025 (Per Metric Ton)

Carbon Steel Round Bar Price Comparison

Note: Prices updated as of Q2 2025. Subject to change with market conditions.

How MWaolloys Ensures Quality and Traceability

We implement 100% ultrasonic inspection for critical dimensions, spectrochemical analysis on every heat batch, and issue MTCs compliant with EN 10204-3.1/3.2.

Additionally, we are ISO 9001:2015 certified, and our mills are equipped with:

• Digital bar-coding systems.

• Automated ultrasonic flaw detection.

• CNC-controlled heat treatment.

• Robotic material handling lines.

Frequently Asked Questions

Q1: What carbon steel grades do MWaolloys round bars include, and how do they differ?
We offer grades such as AISI 1018, 1045, 1060, and ASTM A350 LF2. Low-carbon options (e.g., 1018) deliver high ductility and weldability, while medium-carbon grades (like 1045, 1060) provide greater strength and wear resistance. The LF2 grade adds low-temperature impact toughness, ideal for oil & gas environments.

Q2: Are custom sizes, lengths, and finishes available?
Yes. We customize diameters from 6 mm up to 600 mm and offer length cuts as short as 300 mm to full-length bars (12 m). Finishes include hot-rolled, cold-drawn, peeled, polished, galvanized, and powder-coated to suit specific application needs.

Q3: How does heat treatment alter the mechanical properties?
Heat treatment options such as annealing, normalizing, quenching & tempering deliver different performance profiles. For example, quenching & tempering can raise tensile strength to approximately 740 MPa (as seen in AISI 1060), while annealing enhances flexibility for easier forming.

Q4: Can I get mill test certificates and inspection documentation?
Certainly. Each shipment includes EN 10204‑3.1/3.2 mill test certificates, laser-etched batch codes, chemical composition analysis, and ultrasonic inspection records. This ensures traceability and compliance with global standards.

Q5: What corrosion protection options do you offer for outdoor or marine projects?
Available protective layers include hot-dip galvanizing, powder coating, phosphating, and pickling, which help prevent rust in humid, marine, or chemical-exposed environments—extending service life significantly.

Q6: What is the minimum order quantity and delivery timeline?
Our standard minimum order is 3 metric tonnes per grade and size. For small-batch needs, we facilitate LCL shipments. Typical lead time is 7–14 days, though urgent requests can often be accommodated faster depending on inventory.

Official References

• World Steel Production Statistics – Worldsteel Association
• ASTM A108 Standard Specification for Steel Bars, Carbon
• ISO 683-1:2016 – Heat-Treatable Steels, Alloy Steels and Free-Cutting Steels