softening or annealing sae 9260
softening or annealing sae 9260
(OP)
Hi all.
I have a few cold drawn sae 9260 round bar , size from 7/16" (11,11 mm) to 3/4" (19,05 mm) and I need to down its hardeness to less than 190 brinnel.
What could be the appropiate heat treatment .?
The pourpouse of this treatment is to allow a cold drawn reduction to get smaller diameter.
The material will be used to make car suspension springs, it will hardendened after coiling .
This the chemical composition
Component
Carbon, C 0.56 0.64
Iron, Fe 96
Manganese, Mn 0.88
Phosphorous, P 0.035
Sulfur, S 0.04
Silicon, Si 2
Thanks in advance
I have a few cold drawn sae 9260 round bar , size from 7/16" (11,11 mm) to 3/4" (19,05 mm) and I need to down its hardeness to less than 190 brinnel.
What could be the appropiate heat treatment .?
The pourpouse of this treatment is to allow a cold drawn reduction to get smaller diameter.
The material will be used to make car suspension springs, it will hardendened after coiling .
This the chemical composition
Component
Carbon, C 0.56 0.64
Iron, Fe 96
Manganese, Mn 0.88
Phosphorous, P 0.035
Sulfur, S 0.04
Silicon, Si 2
Thanks in advance
Pardal





RE: softening or annealing sae 9260
RE: softening or annealing sae 9260
1) heat to 760 °C (1400 °F) then cool to 705 °C (1300 °F) at a rate not to exceed 6 °C (10 °F) per hour.
or
2) heat to 760 °C then cool rapidly to 665 °C (1230 °F) and hold for 10 hours.
Since you are looking for the low end of possible hardness, you may need to use slightly longer times at temperature.
RE: softening or annealing sae 9260
have a happy week end
Pardal
Pardal
RE: softening or annealing sae 9260
I'm not sure if you already know this, but using SAE 9260 with 0.04% Sulfur for an automotive suspension spring is not a good idea. This level of Sulfur will result in many sulfide inclusions which greatly reduce the fatigue strength. Typical Sulfur levels from true spring steels are more like 0.008%.
RE: softening or annealing sae 9260
This composition was token from a data sheet, not from a chemical analysis.
I will check it .
Thanks for the tip.
Pardal