440HBW quenched and tempered tool and engineering steel round bar
Description
Pre-hardened, precise, predictable steel, now in round bars.
440HBW tool steel round bars are pre-hardened, ready-to-use quenched and tempered tool steels that come in a range of diameters from small to large.
Suitable for engineering applications in tool holders and in different types of shafts and rolls, the diameter dimensions also provide a better solution for round parts in tooling applications like molding and in dies for aluminium die casting.
Dimension Range
440HBW tool steel round bars are available in diameters 21 - 172 mm. Other dimensions can be available on request.
Mechanical Properties
| Diameter (mm) | Hardness (HBW) |
| 21 - 150 | 410 - 475 |
Bar Hardness is measured on a milled surface, with indents positioned as impact test according to EN 10083.
Impact Properties
| Diameter (mm) | Min. Impact Energy for Charpy-V, longitudinal direction |
| 21 - 141 | 18 J / 20 °C |
| 142 - 150 | 11 J / 20 °C |
Impact testing according to EN 10083, EN ISO 148.
Ultrasonic testing
Ultrasonic inspection is carried out according to EN 10308
Diameter and Length
Tolerances according to EN 10 060.
Straightness
Straightness according to EN 10 060.
Surface Properties
Turned surface.
Delivery Conditions
Quenched and Tempered at a minimum temperature of 590°C.
On delivery from VANFORGE the bars meet the following specifications:
- free from mill scale
- not repair welded
Fabrication and Other Recommendations
Welding, bending and machining
440HBW tool steel is not intended for further heat treatment. If 440HBW tool steel is heated above 590°C after delivery from VANFORGE, no guarantees for the properties of the steel are given.
Nitriding or surface coating may be carried out if the temperature is below 590°C.
Appropriate health and safety precautions must be taken when welding, cutting, grinding or otherwise working on the product. Grinding, especially of primer-coated plates, may produce dust with high particle concentration.
Product size range
Diameter: 21mm - 150mm
Length: on request
Production Process
Key clients
