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Help CenterCarbon Steel Rod 1020 1045 4140 20mm 40mm 80mm Annealed Round Bar Length Custom Cutting Tolerance +/-0.05mm
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Hemaokang Steel (Shandong) Co., Ltd. offers high-quality Carbon Steel Rod 1020 1045 4140 in diameters of 20mm, 40mm, and 80mm, with annealed treatment and precision cutting tolerance of +/-0.05mm. As a professional steel manufacturer and exporter based in Liaocheng, Shandong, we combine advanced production lines with strict quality control to deliver round bars that meet diverse industrial requirements. Our annual export value of US$50-100 million reflects the trust and satisfaction of customers across North America, South America, Europe, Southeast Asia, Africa, and the Middle East.
Product Overview
Our carbon steel round bars are produced from selected raw materials and processed through controlled annealing, which improves machinability, reduces internal stress, and ensures uniform hardness throughout the bar. Available in multiple diameters and customizable lengths, these rods are suitable for a wide range of applications including general machining, shaft manufacturing, structural components, and automotive parts. Whether you require standard sizes or specific cutting dimensions, we provide tailored solutions to meet your exact specifications.
Key Features
- Multiple Steel Grades: 1020 low-carbon steel for good weldability and formability; 1045 medium-carbon steel for higher strength and wear resistance; 4140 alloy steel for enhanced toughness and fatigue resistance.
- Precision Cutting: Tolerance of +/-0.05mm ensures consistent dimensions for critical applications, reducing secondary processing time.
- Annealed Condition: Improves ductility, relieves internal stresses, and optimizes microstructure for easier machining and better surface finish.
- Custom Length Options: Length can be tailored from short pieces to long bars based on your production needs, minimizing material waste.
- Surface Choices: Available in black, bright, or as required surface conditions to suit different end uses.
- Reliable Quality: Each batch is tested for chemical composition, mechanical properties, and dimensional accuracy before shipment.
Technical Specifications
| Attribute | Specification |
|---|---|
| Material Grade | 1020 / 1045 / 4140 |
| Diameter Range | 20mm, 40mm, 80mm |
| Condition | Annealed |
| Cutting Tolerance | +/-0.05mm |
| Length | Customizable, up to 6 meters or per request |
| Surface Finish | Black, bright, or as required |
| Inspection | Chemical analysis, mechanical testing, dimensional check |
| Packaging | Bundled with steel straps, or in wooden crates for export |
Material Comparison
| Grade | Characteristics | Typical Applications |
|---|---|---|
| 1020 | Low carbon, excellent weldability, good ductility | General fabrication, structural parts, mild shafts |
| 1045 | Medium carbon, higher hardness, good wear resistance | Axles, gears, bolts, machine components |
| 4140 | Alloy steel, high strength, good fatigue resistance | Heavy-duty shafts, tooling, automotive and machinery parts |
Processing and Quality Control
Each round bar undergoes rigorous processing at our facility. After hot rolling or forging, bars are placed in an annealing furnace to achieve the desired metallurgical structure. Then precise cutting is performed, and every piece is verified with calibrated instruments to ensure the +/-0.05mm tolerance is met. Our quality management system follows ISO9001 standards, covering incoming raw material inspection, in-process monitoring, and final batch testing. This ensures that every shipment meets consistent physical and chemical properties.
Applications Across Industries
- Machinery Manufacturing: Ideal for producing shafts, pins, bushings, and structural frames.
- Automotive Industry: Used for drive train components, axles, steering parts, and fasteners.
- Construction Sector: Suitable for reinforcement structures, brackets, and support rods.
- General Engineering: Perfect for maintenance and repair shops that require reliable steel stock.
Why Choose Hemaokang Steel?
Since our establishment in 2025, we have quickly grown into a trusted supplier for customers on six continents. With a dedicated team of 51-100 employees and an annual export turnover between US$50 million and US$100 million, we have the capacity and experience to handle bulk orders efficiently. Our location in Liaocheng, Shandong, provides convenient access to Qingdao Port, ensuring prompt delivery to international destinations. We are committed to delivering cost-effective solutions without compromising quality.
Frequently Asked Questions
Q1: What is the minimum order quantity for these carbon steel rods?
A: Our standard MOQ is 1 ton, but for sample orders or special testing purposes, smaller quantities are available on request.
Q2: Can you supply lengths other than standard 6 meters?
A: Yes, we offer custom cutting services. You can specify any length within our production capacity, and we will trim the bars precisely to your requirement.
Q3: How accurate is the cutting tolerance?
A: We control cutting tolerance within +/-0.05mm, which is suitable for most precision machining applications without additional processing.
Q4: Are these bars suitable for induction hardening?
A: Grades like 1045 and 4140 respond well to induction hardening, making them appropriate for components requiring a hardened surface layer.
Q5: What surface finish do you recommend for outdoor applications?
A: For outdoor or corrosive environments, we suggest bright finish with anti-rust oil or black painted surface to enhance durability. Please contact us for tailored options.
Q6: What are your payment terms?
A: We commonly accept T/T, L/C, and bank transfer. Terms are negotiable based on order value and customer relationship.
Q7: How long does delivery take?
A: For regular sizes within standard specifications, delivery usually takes 15-20 days after deposit. Custom specifications may require 25-35 days depending on quantity.
Q8: Do you provide material certificates?
A: Yes, mill test certificates and inspection reports are provided with each shipment to guarantee full traceability and compliance.
We invite you to contact our sales team for detailed quotations by email or phone. Our experienced engineers are also available to help select the most suitable steel grade and specification for your specific use case. As an ISO9001-certified manufacturer with a strong export track record, Hemaokang Steel is ready to be your reliable long-term partner for carbon steel products.
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