Hot Rolled / WRD
Wire Rod (Coil)
Hot rolled wire rod per EN 10017 standard, 4-36mm diameter range, delivered in coils.
Technical Specifications
Key Features
- Delivered in coil form
- Suitable for cold drawing and rolling
- Wide diameter range (4-36mm)
- High surface quality
- Suitable for wire drawing and fastener production
- Low oxide scale
Applications
- Wire drawing (steel wire production)
- Bolt and nut manufacturing
- Spring wire production
- Nail and rivet manufacturing
- Cold forming
- Welding wire production
Dimension Table
| Form | Size Range | Standard | Steel Grades |
|---|---|---|---|
| Wire Rod | 4 - 8 mm | EN 10017 | SAE1018, C30, C35, 20MnB5 |
| Wire Rod | 8 - 13 mm | EN 10017 | C45, SAE1018, 30MnVS6, 33MnCrB5 |
| Wire Rod | 13 - 20 mm | EN 10017 | 42CrMo4, C45, 30Mn5, 20MnB5 |
| Wire Rod | 20 - 28 mm | EN 10017 | 42CrMo4, C45, 51CrV4, SAE4140 |
| Wire Rod | 28 - 36 mm | EN 10017 | 42CrMo4, C45, 34CrMo4, 34CrNiMo6 |
Technical Notes
- 01Coil weight typically ranges from 1.5 to 2.5 tons.
- 02Surface condition: as-rolled or annealed available.
- 03Phosphating or lime coating recommended before cold drawing.
- 04Cold heading quality (CHQ) available for fastener production.
- 05Internal diameter standard: 800-1200mm.
What 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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