Steel 1.2758 - MA-Rekord
1.2758 - MA-Rekord steel:
high-alloy and austenitics structure.
What?
1.2758 – MA-Rekord steel is a high-alloy special hot-work tool steel with austenitic structure. The operational strength of approx. 1350-1550 MPa is achieved through forging and then precipitation hardening at approx. 800 °C or through a special heat treatment.
Material properties
Properties of steel type 1.2758 – MA-Rekord
- Strength trough forging and precipitation hardening or heat treatment.
- Water cooling is not possible.
Application
The most common applications for steel type 1.2758 – MA-Rekord
Extrusion dies for processing hard-to-press non-ferrous metals and steel in the manufacture of wire, rods, pipes, strips and simple profiles.
Delivery condition
As disks forged on all sides with the smallest possible thickness, so that a roughly consistent temperature increase is guaranteed in extrusion press operation, in order to prevent stress cracks due to the limited thermal conductivity.
Tensile strength Rm = 1350 – 1550 MPa
Physical properties of 1.2758 - MA-Rekord steel
| Temperature in °C | 20-100 | 20-200 | 20-400 |
|---|---|---|---|
| Thermal expansion in 10-6m/m x K | 11.3 | 11.8 | 12.2 |
Heat treatment
| Preheat before use | Temperature: 400 – 600 °C essential, avoid cooling during press operation |
|---|---|
| Cooling after use | Immediately after the last pressing, slowly from 500 – 600 °C in the furnace |
