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Home > Metallurgy, Mineral & Energy > Steel & Products > Steel Round Bar > 1045 Carbon Steel Hot Rolled Round Bar S45C 1.1191 Forged Steel Bar for Machining

1045 Carbon Steel Hot Rolled Round Bar S45C 1.1191 Forged Steel Bar for Machining

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Product Spotlights

High-quality 1045/S45C/1.1191 hot rolled & forged round bar. Excellent machinability, tight tolerances, customizable sizes & surface finishes. ISO9001 certified, wide global export experience. Cost-effective for shafts, gears, bolts, and structural parts. Contact us for samples or bulk orders.

Negotiable MOQ: 1 Ton (Price negotiable depending on order volume and customization)

Key Specifications

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Standard:

AISI, ASTM, DIN, JIS, GB

Application:

Other, Machining

Material:

1045 Carbon Steel / S45C / 1.1191

Contact Supplier Request Quote Chat Now

Hemaokang Steel (Shandong) Co., Ltd.

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

Qingdao Port

Delivery Detail:

7 days

Product Details
Company Profile
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Standard AISI, ASTM, DIN, JIS, GB

Application Other, Machining

Material 1045 Carbon Steel / S45C / 1.1191

Process Hot Rolled / Forged

Diameter 20mm – 500mm (customizable)

Length 1000mm – 12000mm (customizable)

Surface Black, Bright, Turned, Ground

Hardness As rolled (approx. 170-210 HB) or normalized

Hemaokang Steel (Shandong) Co., Ltd. is a trusted supplier of high-quality carbon steel products, with an annual export value of US$50 million to US$100 million. Our 1045 Carbon Steel Hot Rolled Round Bar (also known as S45C or 1.1191) is specifically engineered for precision machining applications. Manufactured under strict ISO9001 quality management, this steel bar offers excellent machinability, consistent mechanical properties, and reliable performance across various industries. Whether you need standard sizes or custom dimensions, our material is designed to meet the rigorous demands of modern manufacturing.

Product Features & Technical Specifications

Premium Material Composition: 1045 medium carbon steel (0.45% carbon) provides a balance of strength, toughness, and wear resistance, ideal for parts that require both hardness and ductility.
Hot Rolled & Forged Options: Available in both hot rolled and forged forms. Hot rolled bars offer a cost-effective solution with good surface finish, while forged bars deliver enhanced grain flow and higher mechanical integrity for heavy-duty applications.
Excellent Machinability: With a hardness range of 170–210 HB in the as-rolled condition, this steel bar allows for efficient cutting, drilling, turning, and milling, reducing tool wear and production time.
Strict Dimensional Tolerances: Our round bars are produced to tight tolerances (e.g., h9, h11) to ensure consistency in machining and assembly processes.
Customizable Sizes & Surface: Diameters from 20mm to 500mm, lengths from 1m to 12m, and surface finishes such as black, bright, turned, or ground are available upon request.
Multi-Standard Compliance: Meets AISI 1045, DIN 1.1191, JIS S45C, and GB 45# steel standards, making it suitable for global export to North America, Europe, Asia, and beyond.

Parameter	Value
Carbon Content	0.42 – 0.50%
Tensile Strength (min)	570 MPa (as rolled)
Yield Strength (min)	305 MPa
Elongation (min)	16%
Hardness (as rolled)	170 – 210 HB
Density	7.85 g/cm³

Key Benefits for Machining Applications

Reduced Tool Wear: The consistent microstructure and lack of hard spots minimize tool replacement costs during high-volume production.
Improved Surface Finish: Hot rolled bars with tight tolerances allow for finer machining results, reducing the need for secondary finishing operations.
Versatile Use: Ideal for manufacturing shafts, gears, axles, bolts, studs, jigs, and structural components that require good strength and wear resistance.
Heat Treatable: 1045 steel can be quenched and tempered to achieve higher hardness (up to 55 HRC), allowing custom mechanical properties for specific applications.
Cost-Effective: Compared to alloy steels, 1045 carbon steel offers a favorable price-to-performance ratio, making it a popular choice for general engineering and automotive parts.

Trust & Quality Assurance

Hemaokang Steel has been serving global clients since 2025, with a dedicated team of 51–100 employees and annual export turnover exceeding US$50 million. Our products are ISO9001 certified, ensuring consistent quality from raw material sourcing to final inspection. We have a strong presence in markets across North America, South America, Europe, Asia, Africa, and Oceania, and our experienced team provides responsive customer support and customized logistics solutions.

Every batch of 1045 round bar is tested for chemical composition, mechanical properties, and dimensional accuracy before shipment. We also offer third-party inspection services (e.g., SGS, BV) upon request. With our flexible production capacity, we can handle both small trial orders and large container shipments. Contact us today to discuss your specific requirements or request a quote – we are committed to delivering steel bars that perform flawlessly in your machining operations.

Frequently Asked Questions (FAQ)

What is the difference between hot rolled and forged 1045 round bar?
Hot rolled bars are produced by rolling steel at high temperature, resulting in a cost-effective product with scale surface. Forged bars undergo mechanical pressing, which refines the grain structure and improves toughness, making them suitable for critical parts like shafts and gears under high stress.
Can I get the bar in a normalized or annealed condition?
Yes, we offer heat treatment options such as normalizing, annealing, or quenching and tempering to achieve specific hardness and mechanical properties. Please specify your requirements when ordering.
What surface finishes are available?
Standard finishes include black (as rolled), bright (peeled), turned, and ground. For precision machining, bright or ground bars provide tighter dimensional tolerances and a smoother surface.
What is the typical lead time for orders?
For standard sizes and quantities, lead time is 7–15 days. Custom sizes or heat treatments may require 20–30 days. We can expedite urgent orders based on stock availability.
Do you provide certificates of material and test reports?
Yes, each shipment includes a mill test certificate (MTC) with chemical and mechanical properties. Third-party inspection reports are available at an additional cost.
Can I order a small sample for testing before bulk purchase?
Absolutely. We support sample orders (e.g., one piece or a small bundle) to evaluate quality. Sample costs are negotiable, and shipping is at buyer’s expense.
Is this steel bar suitable for welding?
1045 carbon steel has medium carbon content, which can be welded with proper preheating (150–250°C) and post-weld heat treatment to avoid cracking. For critical weld joints, consider using low-hydrogen electrodes.
What packaging options do you offer?
Bars are bundled with steel straps and protected by water-resistant paper or plastic wrap. For sea freight, we use wooden pallets or crates to prevent damage during transit.