Carbon Steel Square Bar
Engineered for superior strength, toughness and durability in the most demanding industrial applications. Manufactured by Jiyuan Iron & Steel with precision engineering and strict quality control.
Carbon Steel Square Bar Manufacturer in China
Our Alloy Steel Square Bars are manufactured with precision engineering and strict quality control to deliver enhanced mechanical properties for demanding industrial applications. With carefully controlled alloying elements and specialized heat treatment processes, these square bars offer superior strength, toughness, and wear resistance compared to standard carbon steel alternatives.
Why Choose Our Carbon Steel Square Bars?
We understand the critical factors B2B clients evaluate when sourcing materials for demanding applications.
Enhanced Mechanical Properties
Our alloy steel square bars offer exceptional strength, toughness, and wear resistance through precise alloying element control and advanced heat treatment processes.
Precision Manufacturing
Utilizing state-of-the-art production technology at our Jiyuan facilities, we ensure consistent dimensional accuracy and uniform material properties in every batch.
Global Quality Standards
All our alloy steel square bars meet rigorous international standards, providing reliable performance for critical applications worldwide.
Technical Support
Our engineering team provides comprehensive material selection guidance and application support to optimize your manufacturing processes.
Carbon Steel Square Bar Features
Our Carbon Steel Square Bar are engineered to deliver reliable performance across demanding industrial applications.
Superior Strength & Toughness
- Through precise alloying element control and advanced heat treatment processes, our alloy steel square bars offer enhanced mechanical properties compared to standard carbon steels, making them ideal for high-stress applications requiring exceptional durability.
Precision Manufacturing
- Utilizing advanced production techniques and strict quality control at our Jiyuan facilities, we ensure consistent dimensional accuracy, perfect squareness, and uniform material properties in every production batch for reliable manufacturing performance.
Versatile Industrial Applications
- From construction machinery and mining equipment to automotive components and industrial gear systems, our alloy steel square bars deliver reliable performance where superior mechanical properties and structural integrity are critical for operational success.
Carbon Steel Square Bar Specifications
Comprehensive range of alloy steel grades and sizes to meet your specific application requirements.
| Category | Typical Grades | Size (mm) | Standard |
| Carbon Structural Steel | Q195, Q215, Q235, Q275 | ø12-300 | GB/T 699 GB/T 700 GB/T 1222 GB/T 5216 GB/T 18731 GB/T 26075 GB/T 1591 GB/T 3077 Japanese Standard German Standard |
| Low Alloy High Strength Structural Steel | Q355, Q390, Q420, Q460, St52-3, S355Jo | ø12-300 | |
| Quality Carbon Structural Steel | 10-55, 20Mn-65Mn, CB5, C35, C45, S25C-S55C, S45CB, S45SC | ø12-300 | |
| Alloy Structural Steel | 20Mn2-50Mn2, 27SiMn-42SiMn, 40B-50B, 25MnB-45MnB, 20MnMoB, 15MnVB-40MnVB, 15CrMn-40CrMn, 20MnTiB, 20Cr-50Cr, 20CrNi-50CrNi, 20CrMoA-42CrMoA, 12Cr1MoV, 40CrV, 30CrMnSi, 35CrMnSi, 20CrMnMo, 40CrMnMo, 20CrMnTi, 30CrMnTi, 15CrNiMo-40CrNiMo | ø12-300 | |
| 16MnCr5, 20MnCr5, 30Mn5, 41Cr4, 37Cr54, 42CrMo4, 25MnCrNiMoA, 23MnNiMoCr54, SAE1043, 1E Series, SMn443H, 15B36CrI | |||
| Guaranteed Hardenability Structural Steel | 45H, 15CrII-45CrII, 15CrMoII-42CrMoII, 22CrMoII, 20CrMnTiIII-II5, 20CrMnMoII, 40MnBH, 45MnBH, 20MnVBH | ø12-260 | |
| 16MnCr5H, 20MnCr5H, 8620H, SCM420H, 17CrNiMo6, 18CrNiMo7-6 | |||
| Steel for Petroleum Applications | 20CrMoA-42CrMoA, 3130, 4138, 4138M, 4140, 4142, 4330, SAE4137H, AISI4145H, AISI4130, 37CrMnMo | ø12-250 | |
| Bearing Steel | GCr15, GCr15SiMn, SAE52100, SUJ2, 100Cr6, GCr15-K2, LYHB55, S53C, S55C, SAE1055, G65Mn, 42CrMo4, SAE4320, 100CrMnMoSi8-4-6, 100CrMo7-3 | ø12-120 | |
| Free-Cutting Steel | 1215, GT1215S, 11SMn30, 11SMn37, SAE1144, SAE1141, Y08-45, S45CL, 45S | ø12-90 | |
| Non-Demoulding Mechanical Structural Steel | C7056BY, 46MnVS5, 1E1497, 30MnVS6, 38MnVS6, 49MnVS3, F45MnVS, F40MnVS, F45VS, 20MnV6, HY4520, SY740, JGF45V, HL610, HL740, 25Mn2CrVS | ø12-300 | |
| Spring Steel | 65Mn, 60Si2Mn, 60Si2Cr, 55SiCr, 55Cr3, 50CrV, 51CrV4, 60Si2CrVAT | ø12-120 | |
| Wear-Resistant Steel Ball Steel | B2, B3, B2B, HM20620, HM20421, HM21430, HM21530, GN-3A-1, GN-3A-2, GN-2A, GN-2A-1 | ø12-180 |
Note: Custom sizes, special requirements, and heat treatment options available upon request. All our alloy steel square bars are produced with strict quality control to ensure dimensional accuracy and consistent mechanical properties.
Why Choose CHINASPECSTEEL™ Alloy Steel Square Bar ?
With decades of expertise in steel production, Jiyuan Iron & Steel Group has established itself as a leading manufacturer of high-quality alloy steel products for global industrial markets. Our commitment to excellence and innovation has made us a trusted supplier of alloy steel bars, carbon steel bars, and specialized steel products.
As a premier steel manufacturer in China’s Henan province, we specialize in alloy steel square bars while offering a comprehensive range of steel products for specialized applications. Our state-of-the-art facilities and rigorous quality control ensure that every steel bar meets international standards and customer specifications.
Jiyuan Iron & Steel Group provides flexible manufacturing solutions including custom sizes, special heat treatments, and comprehensive technical support for all our alloy steel and carbon steel products, serving clients in construction, automotive, machinery, and heavy equipment industries worldwide.
Alloy Steel Square Bar Application Areas
Our alloy steel square bars are used across multiple industries for demanding applications.
Heavy Machinery
Critical components for construction, mining, and agricultural equipment requiring high strength and wear resistance.
Automotive Industry
High-stress components for vehicles, trucks, and transportation equipment demanding durability and impact resistance.
Oil & Gas Equipment
Components for drilling, extraction, and processing equipment operating in extreme conditions and high-pressure environments.
Industrial Machinery
Gears, shafts, and structural components for manufacturing equipment requiring precision and durability.
what is alloy steel round bar？
An alloy steel round bar is a cylindrical steel product manufactured by combining iron with strategic alloying elements such as chromium, nickel, molybdenum, and vanadium. These additions enhance the base material’s mechanical properties, creating a superior engineering material that offers greater strength, hardness, toughness, and wear resistance compared to standard carbon steel.
What is special steel round bar?
Special steel round bar refers to high-performance, long steel products with a circular cross-section, engineered for applications demanding superior strength, hardness, or wear resistance—unlike common reinforcement bars used in concrete. It is a precision-engineered raw material supplied in various conditions (hot-rolled, cold-drawn, or turned) for creating critical components like shafts, gears, and fasteners in automotive, machinery, and aerospace industries.
What is 4140 Alloy Steel Round Bar?
AISI 4140 alloy steel round bar is a versatile chromium-molybdenum steel known for its high strength, good toughness, and excellent wear resistance. It is categorized as a high-tensile, medium-carbon steel that can be heat-treated to achieve a wide range of mechanical properties.
Why Jiyuan Steel Stands Out？
China’s leading alloy steel round bar manufacturers include major producers like Baowu Steel, Ansteel, Shagang Group, and Shougang Group. Among these industrial giants, Henan Jiyuan Iron & Steel Group has established itself as a premier specialist in alloy steel round bar production through decades of technological refinement and quality focus.
Ready to Source Premium Alloy Steel Square Bars?
Contact Jiyuan Iron & Steel Group today for competitive pricing, technical specifications, and delivery options tailored to your industrial requirements.
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