Hot Rolled Steel Bars
Comprehensive hot rolled steel bar solutions and technical specifications for industrial applications
Bar Forms
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Round Steel Bar
Hot rolled round steel bars per EN 10060 standard, 12-340mm diameter range. Quenched & tempered, case-hardening, and structural steels.
Dimensions & Grades Table
| Form | Size Range | Standard | Steel Grades |
|---|---|---|---|
| Round | 12 - 20 mm | EN 10060 | C45, 42CrMo4, 16MnCrS5, S355J2 |
| Round | 20 - 50 mm | EN 10060 | 42CrMo4, 34CrNiMo6, C45, SAE4140 |
| Round | 50 - 100 mm | EN 10060 | 42CrMo4, 34CrMo4, 18CrNiMo7-6, C45 |
| Round | 100 - 200 mm | EN 10060 | 42CrMo4, 34CrNiMo6, 51CrV4, C45R |
| Round | 200 - 340 mm | EN 10060 | 42CrMo4, 34CrNiMo6, C45, S355J2 |
Key Features
- Wide diameter range (12-340mm)
- 40+ different steel grades
- High mechanical strength
- Quenched/tempered and case-hardening steels available
- EN 10204 3.1 material certificate
- Precise dimensional tolerances
Applications
- Automotive parts (shafts, axles, gears)
- Machine manufacturing
- Hydraulic cylinder rods
- Gear and shaft production
- Energy sector
- Defense industry
Technical Notes
- Tolerances applied per EN 10060 Table 1 and 2.
- Standard lengths available as 3-6m or 6-12m.
- Ultrasonic testing available per SEP 1920.
- Heat treatment condition: as-rolled, normalized, or quenched & tempered.
- 3.1 certificate with chemical analysis and mechanical properties.
Related Sectors
Useful Calculation Tools
Detailed Technical Information and Quotation
Contact our expert team for detailed technical documents, application recommendations, and custom size quotations regarding this product type.
Get Technical SupportWhat is a hot rolled steel bar?
A hot rolled bar is produced by shaping steel between rolls above its recrystallization temperature (~1100–1250°C), in round, square, hexagonal or flat sections. It is the most economical bar form; the surface carries a thin mill scale and tolerances are wide (EN 10060). It is the primary starting stock for machining, forging and cold drawing.
Production, tolerances and applications
A billet (~150×150 mm) is reheated and passed through successive rolling stands to reduce the section; hot deformation refines the grain and breaks up the cast structure. The mill scale and wide diameter tolerance mean precision applications need further processing (cold drawing, peeling, grinding → bright steel). Common grades: S235JR–S355J2 structurals, C45, 42CrMo4, 16MnCr5. Construction, machine building and forging stock are the biggest uses.
Frequently Asked Questions
What is the difference between hot rolled and cold drawn?+
Hot rolling is done at high temperature: economical but with scale and wide tolerances. Cold drawing is done at room temperature: tight tolerance (h9/h11), bright surface and higher yield strength from strain hardening.
What are hot rolled bar tolerances?+
Per EN 10060, roughly ±0.4 to ±2.0 mm depending on diameter; for precision work choose bright steel.
Which sections are produced?+
Round, square and hexagonal bars plus flats; round bar is the most common commercial form.
Where are hot rolled bars used?+
Machine parts, bolt/fastener blanks, forging stock, construction and general fabrication.
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