Hot-Rolled Steel Billet | ASTM A633 Grade C | 120mm Diameter x 6m Length

Hot-rolled steel billet represents a fundamental semi-finished steel product manufactured through continuous casting processes, serving as the essential raw material for downstream rolling operations in structural steel, reinforcement bar, and wire rod production. These square or rectangular cross-section steel forms find extensive application in construction, automotive manufacturing, and industrial fabrication sectors where cost-effective material conversion is paramount. Produced to ASTM A633 Grade C specifications, our 120mm diameter billets deliver superior mechanical properties with tensile strength exceeding 485 MPa, making them the preferred choice for manufacturers requiring consistent quality and dimensional accuracy in their rolling mill operations.

What is Hot-Rolled Steel Billet?

Hot-rolled steel billet is a semi-finished casting product with square or rectangular cross-sections, typically ranging from 100mm to 200mm per side, manufactured through continuous casting technology at temperatures above 1,200°C. This intermediate steel form serves as the primary feedstock for re-rolling mills that produce finished long products including deformed bars, wire rods, structural sections, and seamless pipes.

Hot-Rolled Steel Billet Technical Specifications

Our ASTM A633 Grade C hot-rolled steel billets comply with stringent chemical composition requirements: carbon content 0.20% maximum, manganese 1.15-1.50%, phosphorus 0.035% maximum, sulfur 0.040% maximum, and silicon 0.15-0.40%. Mechanical properties include minimum yield strength of 345 MPa, tensile strength of 485-620 MPa, and elongation of 21% in 50mm gauge length per ASTM A633/A633M-01 Section 6. Standard billet dimensions are 120mm × 120mm cross-section with lengths of 6 meters, though custom sizes from 100mm to 165mm square are available upon request.

Manufacturing Process and Quality Control

Production follows continuous casting methodology where molten steel at 1,540-1,560°C is poured into water-cooled copper molds, achieving solidification rates of 0.8-1.2 meters per minute. Each billet undergoes ultrasonic testing per ASTM A435 to detect internal discontinuities exceeding 3mm diameter, ensuring structural integrity for subsequent hot rolling operations. Surface quality meets ASTM A903 Grade B standards with maximum allowable defect depth of 1.5mm, and dimensional tolerances are maintained within ±3mm for cross-sectional dimensions per ASTM A1058.

Applications and Industry Usage

These hot-rolled steel billets serve critical roles in reinforcement bar production for concrete structures, wire rod manufacturing for fastener industries, and structural section rolling for construction applications. The automotive sector employs billets for forging operations producing crankshafts, connecting rods, and transmission components. Oil and gas industries utilize this material as feedstock for seamless pipe manufacturing, while the railway sector relies on billets for rail fastener production and wheel rim forging operations.

Why Choose Our Hot-Rolled Steel Billet

Our manufacturing facility operates under ISO 9001:2015 quality management certification, ensuring consistent chemical composition control within ±0.02% variance for critical alloying elements. We maintain mill-direct pricing structures that reduce material costs by 12-18% compared to distributor channels, while our strategic location near major shipping ports enables delivery lead times of 18-25 days to international destinations. Each production lot includes complete mill test certificates per EN 10204 Type 3.1, documenting full traceability from heat number through final inspection results.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard minimum order quantity is 100 metric tons per specification, equivalent to approximately one 20-foot container. For established customers with ongoing requirements, we accommodate partial container loads of 25 tons minimum with adjusted pricing to reflect additional handling costs.

Do you provide material test certificates?

Yes, every shipment includes EN 10204 Type 3.1 mill test certificates issued by our quality assurance department and countersigned by independent third-party inspection agencies such as SGS or Bureau Veritas. Certificates document complete chemical analysis, mechanical test results, heat treatment records, and dimensional inspection data for full material traceability.

What is the typical delivery time?

Standard delivery schedules range from 18 to 25 days from purchase order confirmation, including 7-10 days for production, 3-5 days for quality inspection and documentation preparation, and 8-10 days for ocean freight to major international ports. Expedited production is available with 12-15 day lead times for orders exceeding 200 metric tons.

Can you cut to custom sizes?

Absolutely. Our cutting facilities accommodate custom length requirements from 3 meters to 12 meters with tolerance of ±50mm, and cross-sectional dimensions from 100mm to 165mm square. Custom cutting services add 3-4 days to standard production schedules, with additional charges of $15-25 per ton depending on complexity and quantity.

Get a Competitive Quote for Hot-Rolled Steel Billet

Contact our technical sales team today to receive factory-direct pricing on ASTM A633 Grade C hot-rolled steel billets tailored to your specific dimensional and volume requirements. Our application engineers provide complimentary material selection consultation, helping you optimize steel grade selection for your rolling mill operations while ensuring compliance with relevant international standards and end-use performance criteria.