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Help CenterAISI 1045 Hot Rolled Carbon Steel Round Bar 20mm-200mm Diameter SAE 1045 C45
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Welcome to Hemaokang Steel (Shandong) Co., Ltd. — your trusted partner in high-quality carbon steel products. Our AISI 1045 Hot Rolled Carbon Steel Round Bar (also known as SAE 1045 or C45) is designed for demanding applications that require a balance of strength, toughness, and machinability. With diameters ranging from 20mm to 200mm, this product is ideal for manufacturing shafts, gears, bolts, and other mechanical components. As a company with an annual export value of US$50 Million – US$100 Million and serving global markets including North America, Europe, Southeast Asia, and Africa, we ensure consistent quality and reliable supply. Our ISO9001 certification guarantees that every round bar meets stringent international standards.
Product Features & Technical Specifications
AISI 1045 is a medium-carbon steel with excellent weldability, good machinability, and high strength after heat treatment. The hot-rolled process ensures a uniform grain structure and superior mechanical properties. Key features include:
- Diameter Range: 20mm – 200mm, available in various increments to suit your application.
- Material Grade: AISI 1045 / SAE 1045 / C45 (equivalent to DIN 1.1191).
- Process: Hot rolled, with black surface finish as standard. Pickled or other finishes available upon request.
- Length: Standard 6m or 12m; custom lengths can be cut to your specifications.
- Tolerance: Conforms to industry standards (e.g., h9 – h11) or as per customer requirement.
- Heat Treatment: Can be supplied normalized, quenched and tempered, or annealed (optional).
| Parameter | Value |
|---|---|
| Chemical Composition (C) | 0.42% – 0.50% |
| Chemical Composition (Mn) | 0.60% – 0.90% |
| Tensile Strength (as rolled) | ≥ 570 MPa |
| Yield Strength (as rolled) | ≥ 310 MPa |
| Elongation | ≥ 16% |
| Hardness (as rolled) | HB 170 – 210 |
Advantages for Your Business: Our AISI 1045 round bars offer excellent machinability, reducing tool wear and production time. They respond well to heat treatment, allowing you to achieve desired hardness and strength for applications like gears, shafts, and axles. The consistent quality across diameters ensures reliable performance in critical components. With a wide range of diameters in stock, we can fulfill both small and large orders promptly.
Trust & Reliability
At Hemaokang Steel, we are committed to delivering excellence. With ISO9001 certification, our manufacturing processes are strictly controlled from raw material sourcing to final inspection. Our team of 51–100 experienced professionals ensures that every batch meets your specifications. Despite being established in 2025, our annual export value of US$50 Million – US$100 Million reflects the trust our global customers place in us. We serve markets across North America, South America, Europe, Africa, Oceania, Asia and more. Choose Hemaokang Steel for your carbon steel round bar needs — we guarantee quality, competitive pricing, and timely delivery. Contact us today for a quote or to discuss your custom requirements.
Frequently Asked Questions (FAQ)
- What is the difference between AISI 1045 and C45? They are essentially the same grade — AISI 1045 is the US designation, while C45 is the European equivalent (EN 10083-2). Both have similar chemical composition and mechanical properties.
- Can you supply the round bar in normalized or quenched and tempered condition? Yes, we can supply heat-treated bars upon request. Please specify your requirements when ordering.
- What are the standard tolerances for diameter? Typically, our hot-rolled round bars are supplied with tolerances conforming to h9–h11. Tighter tolerances are available as a custom option.
- Do you offer custom lengths? Absolutely. Standard lengths are 6m and 12m, but we can cut to any length you need (e.g., 3m, 4m, or specific lengths).
- What surface finish is available? The standard finish is black (as rolled). We also offer pickled, bright, or turned finishes for an additional cost.
- What is the minimum order quantity (MOQ)? For stocked diameters, MOQ is typically 1 ton. For non-standard sizes, please inquire.
- How do you ensure quality? Our factory is ISO9001 certified. We perform chemical analysis, tensile testing, and dimensional inspection for each batch. Mill test certificates are provided.
- What is the packaging for export? Bars are bundled with steel straps, wrapped in waterproof paper, or packed in wooden crates as per your request. We ensure safe transportation.
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