Annealed N690

[Steve.Muller]

Today annealed N690 for the 1st time according to instructions. Steel colour is now ( Yellow/ Gold.
Is that normal or did i do something wrong.

 

[Stacy E. Apelt - Bladesmith]

Surface colors mean almost nothing. It is just surface oxides.

For clarity, you should tell us how you did the annealing.

 

[DevinT]

Do you mean tempering or annealing? Are you a native English speaker?

Hoss

 

[Steve.Muller]

Surface colors mean almost nothing. It is just surface oxides.

For clarity, you should tell us how you did the annealing.

Heat Treating N690 from Bohler Uddeholm (recommended)

Annealing N690:

It is recommended to anneal after any laser cutting or hammering of steel to relieve

any possible stress in the steel.



Heat the blade in the furnace to 750°C and hold for 30 minutes.

Allow the blade to cool

slowly inside the furnace to room temp.

 

[Steve.Muller]

Do you mean tempering or annealing? Are you a native English speaker?

Hoss

Annealing, no second language

 

[DevinT]

Heat Treating N690 from Bohler Uddeholm (recommended)

Annealing N690:

It is recommended to anneal after any laser cutting or hammering of steel to relieve

any possible stress in the steel.



Heat the blade in the furnace to 750°C and hold for 30 minutes.

Allow the blade to cool

slowly inside the furnace to room temp.

That is stress relieving, it’s not quite a subcritical anneal. Surface oxides are normal at those temperatures, won’t hurt a thing.

Hoss

 

[Stacy E. Apelt - Bladesmith]

Yep, you are good to go with that stress relief. Ignore the surface colors, they sand right off.

 

[Steve.Muller]

Thx for the info