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Home > Metallurgy, Mineral & Energy > Steel & Products > Steel Round Bar > 1045 4140 Hot Rolled Carbon Steel Round Bar 1m-6m Length for Forging and Heat Treatment

1045 4140 Hot Rolled Carbon Steel Round Bar 1m-6m Length for Forging and Heat Treatment

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1045 4140 Hot Rolled Carbon Steel Round Bar 1m-6m Length for Forging and Heat Treatment photo-4

1045 4140 Hot Rolled Carbon Steel Round Bar 1m-6m Length for Forging and Heat Treatment photo-5

Product Spotlights

Our 1045/4140 hot rolled carbon steel round bars (1m–6m) are precision-rolled for forging and heat treatment, offering excellent machinability, consistent hardness, and customizable lengths. Backed by ISO9001 certification and a global export network, these bars reduce waste, improve production efficiency, and meet diverse industrial needs.

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

Key Specifications

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Application:

Other, Forging

Standard:

Other, ASTM A29 / AISI (available upon request)

Material:

1045 / 4140 (Carbon Steel)

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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Application Other, Forging

Standard Other, ASTM A29 / AISI (available upon request)

Material 1045 / 4140 (Carbon Steel)

Diameter Customizable (available upon request)

Length 1m – 6m (standard, customizable)

Surface Finish Hot Rolled (black surface)

Certification ISO9001:2015

Heat Treatment Quenching, Tempering, Normalizing (suitable)

Hemaokang Steel (Shandong) Co., Ltd. is a trusted supplier of high-quality hot rolled carbon steel round bars, specializing in grades 1045 and 4140 with lengths from 1m to 6m for forging and heat treatment applications. Our ISO9001-certified production facilities ensure consistent dimensional accuracy and excellent mechanical properties, making these bars ideal for demanding industrial uses. With an annual export value exceeding US$50 million and a global presence across North America, Europe, Asia, and Africa, we deliver reliable steel solutions that meet your manufacturing needs.

Key Features & Technical Specifications

Material Grades: Available in 1045 (medium carbon steel with good strength and wear resistance) and 4140 (chromium-molybdenum alloy steel offering enhanced toughness and hardenability).
Hot Rolled Finish: Black surface with tight tolerances, suitable for forging, machining, and subsequent heat treatment processes.
Length Options: Standard lengths from 1m to 6m; custom lengths available upon request to minimize waste and improve production efficiency.
Heat Treatment Compatibility: Both grades respond well to quenching, tempering, normalizing, and annealing, allowing you to achieve desired hardness and mechanical properties.
Dimensional Consistency: Strict control over diameter tolerance (typically ±0.5mm) ensures predictable performance in machining and forging operations.

Parameter	1045 Grade	4140 Grade
Carbon Content	0.45%	0.40%
Alloying Elements	None	Cr, Mo
Typical Tensile Strength (As-rolled)	570 – 700 MPa	655 – 750 MPa
Hardness (Brinell, As-rolled)	~170 HB	~197 HB
Weldability	Good (preheat recommended)	Fair (preheat and post-weld treatment required)

Advantages for Your Business

Reduced Material Waste: Custom lengths (1m–6m) allow you to order exactly what you need, cutting down on scrap and lowering overall costs.
Versatile Application: Suitable for manufacturing shafts, gears, bolts, connecting rods, and other forged components requiring heat treatment.
Consistent Quality: Our ISO9001-certified process ensures traceability from raw material to final product, giving you peace of mind for critical applications.
Global Logistics: With a strong export network, we deliver to major markets worldwide within competitive lead times.
Technical Support: Our experienced team can provide material certificates and guidance on heat treatment parameters to optimize your production.

Trust & Reliability

Since our establishment in 2025, Hemaokang Steel has rapidly grown to serve customers across over 15 international markets including North America, South America, Europe, Southeast Asia, and Africa. With a dedicated team of 51–100 employees and an annual export value of US$50–100 million, we have the capacity and expertise to fulfill both small and large orders. Our commitment to quality is backed by ISO9001 certification, and we routinely conduct third-party inspections to ensure compliance with international standards.

We understand that every forging and heat treatment operation has unique requirements. That’s why we offer flexible ordering options, customized diameters, and technical documentation upon request. Contact us today to discuss your specific needs, request a quotation, or request a sample. Let Hemaokang Steel be your reliable partner in carbon steel round bars.

Frequently Asked Questions

Q: What is the difference between 1045 and 4140 steel? A: 1045 is a medium carbon steel with good strength and wear resistance, ideal for general forging and heat treatment. 4140 contains chromium and molybdenum, offering higher hardenability, toughness, and strength, making it suitable for heavy-duty applications like gears and shafts.
Q: Can I get lengths longer than 6m? A: Yes, we can provide custom lengths up to 12m or more, subject to production capacity. Please contact our sales team for specific requirements.
Q: Are these round bars suitable for induction hardening? A: Both 1045 and 4140 are compatible with induction hardening, but 4140 provides deeper case depth due to its alloy content. We recommend performing a trial run to confirm results.
Q: Do you offer material test certificates? A: Yes, we provide mill test certificates (MTC) according to EN 10204 Type 3.1 or 2.2 upon request, ensuring full traceability.
Q: What are the typical tolerances for diameter? A: Standard tolerance is ±0.5mm for hot rolled bars. Tighter tolerances (e.g., ±0.2mm) are available for an additional cost.
Q: Can you supply bars with a machined surface? A: Our standard product is hot rolled black surface. If you require peeled or turned bars, we can arrange that as a secondary process – please inquire for details.
Q: How long does delivery typically take? A: For standard sizes and lengths, lead time is 7–15 days after order confirmation. Custom orders may require 20–30 days depending on quantity.
Q: Is there minimum order quantity (MOQ)? A: Our MOQ is 1 ton for common sizes, but we can accommodate smaller trial orders for new customers. Contact us to discuss.