Contact Platform Support
Help CenterCarbon Steel Bar 45# Steel Round Bar Hardness HRC 20-30 Diameter 10-100mm
Product Spotlights
Related Products
-
Carbon Steel Round Bar With Mill Test Report and 1-Year Warranty Custom Lengths AvailableNegotiableMOQ: 1 Ton -
Carbon Steel Bar for Shaft Manufacturing 1045 Steel Turning Machining PartsNegotiableMOQ: 1 Ton
-
Carbon Steel Hex Bar 17mm AF ASTM A307 Threaded Rod MaterialNegotiableMOQ: 1 Ton
-
Carbon Steel Round Bar With 1 Year Warranty and Free Sample AvailableNegotiableMOQ: 1 Ton
-
AISI 1045 Carbon Steel Round Bar 50mm Dia Standard Tolerances for MachiningNegotiableMOQ: 1 Ton
Hemaokang Steel (Shandong) Co., Ltd. brings you high-quality Carbon Steel Bar 45# (AISI/SAE 1045) with precise hardness control of HRC 20-30 and diameters ranging from 10mm to 100mm. As a reliable supplier established in 2025, we have quickly built a strong export presence with an annual export value of US$50 Million – US$100 Million, serving markets across North America, South America, Europe, Asia, Africa, and Oceania. Our round bars are engineered for balanced strength and machinability, making them a top choice for industrial applications that demand consistent performance and tight tolerances.
The 45# steel round bar is a medium-carbon steel widely used in mechanical parts requiring moderate tensile strength, good toughness, and wear resistance. With a hardness range of HRC 20-30 (typical as-tempered condition), our bars offer excellent machinability while maintaining sufficient hardness for shafts, gears, bolts, and other load-bearing components. Each bar is manufactured under strict quality control, ensuring uniform hardness throughout the cross-section and consistent diameter tolerance.
Key Product Specifications
| Material Grade | Carbon Steel 45# (AISI/SAE 1045 equivalent) |
| Diameter Range | 10 mm – 100 mm |
| Hardness | HRC 20 – 30 (as-tempered, uniform across bar) |
| Length | 3,000 – 12,000 mm (custom lengths available) |
| Surface Finish | Black (as-rolled), Peeled, Polished – customizable |
| Diameter Tolerance | h9 – h11 (or tighter upon request) |
| Applications | Shafts, axles, gears, bolts, connecting rods, structural parts |
Product Features & Benefits
- Controlled Hardness HRC 20-30: Optimized for machining and heat treatment; easy to cut, drill, and turn while providing adequate wear resistance for many applications.
- Consistent Diameter Tolerance: Our advanced rolling and finishing processes ensure dimensional stability, reducing waste and secondary processing time.
- Versatile Material Grade 45#: Offers a good balance of strength, toughness, and weldability, making it suitable for both general engineering and automotive components.
- Wide Diameter Range 10-100mm: One-stop sourcing for small to medium-sized round bars, minimizing the need for multiple suppliers.
- Customizable Surface & Length: Choose black (as-rolled), peeled, or polished finish; lengths can be tailored to your production requirements.
- ISO9001 Quality Management: Each batch is tested for hardness, tensile strength, and chemical composition to ensure uniformity and reliability.
- Large Production Capacity: With 51-100 skilled employees and annual export value exceeding US$50 million, we can fulfill both small trial orders and large-volume contracts.
Our 45# steel round bars are widely used in the manufacture of mechanical parts such as shafts, gears, bolts, and connectors. The controlled hardness range of HRC 20-30 makes them ideal for applications that require subsequent machining or heat treatment. Whether you need bars for automotive drive shafts, construction machinery components, or general industrial equipment, our products deliver consistent performance. The bars are supplied with mill certificates or third-party inspection reports upon request, ensuring full traceability.
Applications Overview
| Industry | Typical Parts |
|---|---|
| Automotive | Axles, steering knuckles, transmission shafts |
| Machinery | Rollers, spindles, hydraulic piston rods |
| Construction | Reinforcement bars, anchor bolts |
| General Engineering | Fasteners, couplings, structural supports |
Why Choose Hemaokang Steel? Our company, located in Liaocheng, Shandong – a major steel production hub in China – benefits from integrated supply chains and advanced manufacturing capabilities. We hold ISO9001 certification, which reflects our commitment to quality management and continuous improvement. With an annual export value of US$50 million to US$100 million, we have established long-term relationships with clients in over 15 major markets worldwide. Our team of 51-100 experienced professionals ensures prompt response, competitive pricing, and reliable logistics from Qingdao Port. Whether you require standard specifications or customized dimensions, we are ready to support your project with professional service and high-quality products.
We invite you to contact us for more details, sample testing, or a tailored quotation. Our technical team can assist with material selection and processing recommendations. Partner with Hemaokang Steel for a dependable supply of 45# steel round bars that meet your exact requirements.
Frequently Asked Questions
A: Our standard hardness range is HRC 20-30 with a typical variation of ±2 HRC. If you need a tighter range, we can adjust the tempering process upon request.
A: Yes, we can provide tighter tolerances such as h7 for specific diameters. Please specify your requirement during inquiry so we can confirm feasibility and pricing.
A: Yes, each shipment is accompanied by a mill test certificate (MTC) showing chemical composition and mechanical properties. Third-party inspection (e.g., SGS, BV) is also available at extra cost.
A: We offer black (as-rolled), peeled (turned), and polished finishes. The surface roughness can be customized to your application needs.
A: For standard diameters and lengths, the MOQ is 1 ton. For special sizes or finishes, please contact us to discuss MOQ and lead time.
A: Bars are bundled with steel straps, wrapped in waterproof paper or plastic, and loaded in containers. We can also customize packaging per your instructions.
A: We can produce lengths up to 18 meters subject to logistics and transport regulations. For very long bars, we recommend using special containers or break-bulk shipment. Please consult our sales team.
A: For stock sizes (common diameters 10-100mm), lead time is 7-15 days after order confirmation. For custom specifications, lead time is 20-30 days depending on quantity.
Send Inquiry to This Supplier
You May Also Like
-
ASTM A36 Carbon Steel Bar 20mm Diameter 6m Length for Structural ApplicationsNegotiableMOQ: 1 Ton
-
SAE 1018 Carbon Steel Bar 1 Inch Diameter Cold Drawn Finish Mill Test ReportNegotiableMOQ: 1 Ton
-
Carbon Steel Flat Bar for Building Frame Construction Hot Rolled A36NegotiableMOQ: 1 Ton
-
Carbon Steel Bar Supplied With Mill Test Certificate and Technical SupportNegotiableMOQ: 1 Ton
-
Q235 Carbon Steel Flat Bar 100mm x 10mm Hot Rolled With JIS StandardNegotiableMOQ: 1 Ton
-
C45 Carbon Steel Round Bar 30mm Dia Brinell Hardness 170-210 HBWNegotiableMOQ: 1 Ton
-
H Beam Steel Factory Direct With 1 Year Warranty and Mill Test Report Q235B Q345BNegotiableMOQ: 1 Ton
-
H Beam Steel for Steel Structure Building Column and Beam Q235B Sizes 150x150 200x200NegotiableMOQ: 1 Ton
-
Pre-painted H Beam Steel Q235B H Section 150x75x5x7mm Galvanized Steel Beam for StructuresNegotiableMOQ: 1 Ton
-
JIS G3101 SS400 H Beam Steel H Section Beam 250x250x9x14mm With Mill Test ReportNegotiableMOQ: 1 Ton
