EOS ToolSteel H13 for EOS M 290 | 40 µm

Heat treated to 50 HRC

EOS ToolSteel H13 can be heat treated to various hardness levels to match the needs of different applications. Heat treatment consists of three stages. First stage is a soft annealing process to relieve stresses form the built part. This treatment is to performed for parts on the building platform. After soft annealing parts can be removed from the building platform and needed post processing and hardening heat treatment can be applied.

1. Soft annealing 
Heating with moderate heating rate and then hold 30 min at 850 °C (±10 °C) when parts have thoroughly heated through. Next cool slowly to 650 °C with a cooling rate of 10 °C/ hour. After reaching 650 °C cooling in air or with low pressure gas cooling.
2. Hardening
Heating with moderate heating rate and then hold 30 min at 1 045 °C (±10 °C) when parts have thoroughly heated through. Quench the parts with high speed gas cooling or warm oil. Optimally continue directly to tempering when reaching 50-70 °C.
3. Tempering
2 times 2 h at 580-650 °C depending on the desired hardness level.
Hold for 2 h at desired temperature when parts have thoroughly heated through. Cool to room temperature between temperings.

Please note:
Due to high stress build up consideration on part size and shape is needed. Parts with 150 mm cross-section can be reliably built with good design principles and when instructions are followed.
Multiple smaller parts can be built on the same platform. To control temperature a 10 mm perforated hatch support is to be applied for each part unless when building a hybrid part on H13 base. For hybrid parts, size of the H13 base needs consideration due to limited heating capacity of hardware.

A soft annealing heat treatment (stage 1) is to be applied to parts on building platform before any manipulation, post processing or removal from platform.
After soft annealing parts can be heat hardened and tempered according to instructions and post processed as conventional H13 parts.