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Help CenterEN 8 (080M40) Carbon Steel Round Bar, 16mm-200mm, Hot Rolled, Normalized, 6m-12m Length, for Industrial Use
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Hemaokang Steel (Shandong) Co., Ltd. is a professional supplier of high-quality carbon steel round bars, established in 2025 with an annual export value of US$50 million to US$100 million. Our EN 8 (080M40) Carbon Steel Round Bar is a reliable choice for industrial applications requiring a balance of strength, machinability, and wear resistance. Produced through hot rolling and normalized treatment, these bars offer consistent mechanical properties and dimensional accuracy, making them ideal for shafts, gears, bolts, and structural components. With a wide diameter range of 16mm to 200mm and lengths from 6m to 12m, we provide flexible solutions for diverse manufacturing needs.
Key Features & Technical Specifications
- Material Grade: EN 8 (080M40) – a medium carbon steel with good tensile strength and toughness.
- Production Process: Hot rolled followed by normalizing to refine grain structure and reduce internal stresses.
- Diameter Range: 16mm – 200mm, available in increments of 1mm (custom sizes upon request).
- Standard Length: 6m – 12m (cut-to-length services available).
- Surface Finish: Black surface from hot rolling; pickling or shot blasting optional.
- Certification: ISO 9001:2015 quality management system (certified).
- Applications: Automotive components, general engineering, machine parts, fasteners, and construction.
Mechanical Properties (Typical Values after Normalizing)
| Property | Value |
| Tensile Strength | 550–700 MPa |
| Yield Strength (min) | 280 MPa |
| Elongation (min) | 16% |
| Hardness (Brinell) | 180–220 HB |
Dimensional Tolerances
| Diameter (mm) | Standard Tolerance |
| 16 – 30 | +/- 0.40 mm |
| 31 – 80 | +/- 0.60 mm |
| 81 – 200 | +/- 1.00 mm |
Advantages for Your Business
- Consistent Quality: Each batch is tested for chemical composition and mechanical properties; mill certificates provided.
- Cost-Effective: Direct from manufacturer with optimized production to reduce waste and lower unit costs.
- Flexible Supply: Large inventory of diameters and lengths ensures fast delivery, even for partial loads.
- Customization: Surface treatments, special lengths, and packaging options available upon request.
- Global Reach: Serving markets in North America, South America, Europe, Asia, Africa, and Oceania with reliable logistics.
Our EN 8 round bars are widely used in the production of shafts, axles, gears, spindles, bolts, and studs where moderate strength and good machinability are required. The normalized condition ensures a uniform microstructure, improving both machining performance and final component reliability.
Why Choose Hemaokang Steel?
With a dedicated team of 51–100 employees and an annual export value exceeding US$50 million, Hemaokang Steel (Shandong) Co., Ltd. has built a strong reputation for timely delivery and product integrity. We hold ISO 9001:2015 certification, which underscores our commitment to quality management and continuous improvement. Our strategic location in Liaocheng, Shandong, allows efficient access to Qingdao Port and other major shipping hubs, ensuring your orders are shipped on schedule.
Contact us today to discuss your specific requirements. Whether you need a standard 6m length or custom diameters, we are ready to provide competitive pricing, expert technical support, and reliable after-sales service. Let Hemaokang Steel be your trusted partner for carbon steel round bars.
Frequently Asked Questions (FAQ)
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Q: What is the difference between EN 8 and 080M40?
A: EN 8 is the British Standard designation, while 080M40 is the numerical code for the same grade under BS 970. They are chemically and mechanically equivalent. -
Q: Can you supply bars larger than 200mm diameter?
A: Yes, diameters up to 350mm are available on request. Please contact us with your specific size. -
Q: Are these bars suitable for welding?
A: EN 8 has moderate carbon content, so preheating and post-weld heat treatment are recommended for thicker sections. We can provide welding guidelines. -
Q: What surface finish do you offer?
A: Standard is hot rolled black surface. Optional pickled, shot blasted, or turned finish is available at additional cost. -
Q: Do you provide third-party inspection?
A: Yes, we can arrange inspection by SGS, BV, or other accredited agencies at buyer's request. -
Q: What is the minimum order quantity (MOQ)?
A: MOQ is typically 1 ton per size, but smaller quantities may be accepted for trial orders. -
Q: How long does delivery take?
A: For standard sizes, delivery is usually 15–20 working days after order confirmation. Custom sizes may require 25–30 days. -
Q: Do you provide free samples?
A: Yes, we can provide small samples (e.g., 300mm length) for evaluation, with freight collect.
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