Specializing in the production of various stainless steel pipes, plates, coils, rods, pipe fittings, high nickel alloy steel products, high temperature resistant products
PRODUCTS
Square Steel Bar
Category:
Carbon Steel Bar
keywords :
Carbon Steel Bar
Product Description
Produced by hot rolling or cold drawing from carbon steel billet, followed by optional heat treatment (annealing, normalizing, quenching & tempering) to achieve desired mechanical properties. Features high strength, good machinability, uniform structure, and cost-effectiveness. Available shapes: round, square, flat, hexagonal, and angle. Grades: Q195, Q235, Q345, Q355, 20#, 45#, 40Cr, S235JR, S355JR, ST37, ST52, A36, A53, 1045, 4140. Diameter (round): 5mm – 300mm. Square size: 6×6mm – 200×200mm. Flat bar: 3×10mm – 20×200mm. Hexagonal bar: 6mm – 100mm (across flats). Length: 3m – 6m or custom. Surface finish: black (hot rolled), pickled & oiled, bright (cold drawn/ground), or turned. Tolerances: hot rolled ±0.5mm, cold drawn ±0.05mm, ground ±0.02mm. Manufacturing: hot rolled for large diameters, cold drawn for precision sizes. Meets ASTM A36/A108, EN 10025, JIS G3101, GB/T 702/GB/T 3077 standards. Custom lengths and shapes available upon request.
Parameter
|
Product name |
Carbon steel bar |
|
Standard |
AISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc |
|
Material |
GB: Q195, Q215, Q235A, Q235B, Q235C, Q235D, Q255A, 255B, Q275, Q295A, Q295B, Q345B, Q345C, Q345D, Q345E, Q390A, Q390B, Q390C, Q390D, Q390E, Q420, Q420B, Q420C, Q420D, Q420E, Q460D, Q460E, Q500D, Q500E, Q550D, Q550E, Q620D, Q620E, Q690D, Q690E,etc. |
|
Diameter |
10-400mm/as you required |
|
Length |
1-12m/as you required |
|
Shape |
Round,Square,Rectangular,etc. |
|
Technique |
Hot Rolled/Cold Drawn |
|
Surface Treatment |
1. Galvanized 2. PVC,Black and color painting 3. Transparent oil, anti-rust oil 4. According to clients requirement |
|
Application |
Widely used in mechanical manufacture,construction field,farm vehicles,agriculture greenhouse,automotive industry, railway, decoration, steel structure,etc. |
Application description
Widely used in construction (reinforcing bars, structural supports), machinery shafts, gears, bolts and fasteners, hand tools, axles, agricultural equipment, and automotive components (crankshafts, connecting rods). The high strength and machinability make it suitable for forging, turning, drilling, and welding in general engineering and structural applications.
Production description
Carbon steel billet is heated and hot rolled to approximate shape and size. For large diameters, the bar is used as-rolled. For precision sizes, the hot rolled bar is cold drawn through a die (with intermediate annealing if needed) to achieve tight tolerances and bright surface. The bar is then straightened, cut to length, and optionally heat treated (normalized, quenched & tempered). Finished bars are inspected for dimensions, surface quality, and mechanical properties.
Shipping Packaging
For export, carbon steel bars are bundled with interleaved paper or plastic separators, wrapped in VCI paper and moisture-proof polyethylene, packed in wooden crates or on ISPM-15 pallets, secured with steel straps, and fitted with edge protectors. Labels include grade, shape, dimensions, length, and heat number for safe sea freight.
Why Choose Us?
1.Factory Strength:Direct manufacturer with integrated hot rolling, cold drawing, heat treatment (annealing, normalizing, Q&T) and straightening lines, ensuring consistent mechanical properties, tight tolerances (cold drawn ±0.05mm), and stable supply for round, square, flat, and hexagonal bars.
2.Quality Assurance:Strict control of chemical composition, tensile strength, hardness, and dimensional accuracy; 100% ultrasonic or eddy current testing available; compliant with ASTM A36/A108, EN 10025, JIS G3101, GB/T 702/GB/T 3077.
3.Certifications & Reports:Mill test certificates (MTC) with each shipment; third-party inspections (SGS, BV) and mechanical property test reports available upon request.
4.Customization & Service:Wide grade range (Q195–Q355, 20#, 45#, 40Cr, S235JR–S355JR, ST37–ST52, A36, 1045, 4140), shapes (round, square, flat, hex), sizes (round 5–300mm, flat 3×10–20×200mm, hex 6–100mm), custom lengths, surface finishes (black, pickled, bright, turned), and heat treatment with fast lead times.
5.Export Packaging:Interleaved paper/plastic separators + VCI paper + moisture-proof wrapping + wooden crates/ISPM-15 pallets + steel strapping + edge protectors for safe sea freight and damage-free delivery.
FAQ
1. How to prevent rust on carbon steel bars during storage?
Store in dry, well-ventilated area on wooden racks, keep original VCI paper and moisture-proof wrapping intact. For long-term storage, apply rust preventive oil. Surface rust on hot rolled bars can be removed by sandblasting or wire brushing before use.
2. Can carbon steel bars be welded directly?
Yes. Most carbon steel grades (Q235, 20#, 45#, S235JR, S355JR) are weldable using standard methods (MIG, arc, TIG). For higher carbon grades like 45# or 40Cr, preheating and post-weld heat treatment are recommended to prevent cracking.
3. What is the difference between hot rolled and cold drawn carbon steel bars?
Hot rolled bars are economical, have a black scale surface, and wider tolerances (±0.5mm), suitable for general structural use. Cold drawn bars offer precise dimensions (±0.05mm), bright smooth surface, and better mechanical properties, ideal for precision machining and tight tolerance applications.
Customer Reviews
FACTORY APPEARANCE
HONORS AND QUALIFICATIONS
The company has sufficient inventory and complete varieties and specifications. Special materials and specifications are produced according to customer requirements and exported to Asia, the Middle East, Europe and other countries and regions. We have our own quality management systems: ISO9001, ISO14000, OHSAS18001 standards.
CUSTOMER VISIT
GET A FREE QUOTE
We understand that our customers value quality and after-sales service most. We consistently adhere to high standards and strict requirements, striving to become your preferred partner.
RELATED PRODUCTS
Get ln Touch Now
Need Assistance? We're Here To Help!
Telephones
Contact Address
Building 1, Wealth No.1 Plaza, Huaiyin District, Jinan City, Shandong Province, China
If you have any questions or need help, please feel free to contact us.
Enter your information and our team will reach out to you shortly.
Copyright : © NUCOR STEEL (SHANDONG) CO., LTD.
