Heat Treating 4130 for toughness
Heat Treating 4130 for toughness
(OP)
We are experiencing problems coming up with the best "recipe" for heat treating a 4130 part for toughness (not hardness). Can anyone provide the best parameters for:
- Austentizing
- Quenching
- Tempering
- Austentizing
- Quenching
- Tempering





RE: Heat Treating 4130 for toughness
"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein
RE: Heat Treating 4130 for toughness
- 1585F for 1 1/2 hours
- Oil quench to room temp (oil maintained at 60°c)
- Temper at 750F for 2 hours
- Air cool to room temp
What have you found to be the most significant factor in making 4130 tough?
RE: Heat Treating 4130 for toughness
"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein
RE: Heat Treating 4130 for toughness
I have attached a drawing so you can get a better idea of the shape of the part.
RE: Heat Treating 4130 for toughness
RE: Heat Treating 4130 for toughness
RE: Heat Treating 4130 for toughness
Many high pressure gas cylinders (oxygen, etc) are 4130 and tempered at 1,000 F min. Cylinders are VERY tough.
If cost counts, consider using 1030 and water quenching. Will be approx. the same hardness and toughness in such a thin part.
"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein
RE: Heat Treating 4130 for toughness
RE: Heat Treating 4130 for toughness
Time for dinner!
"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein
RE: Heat Treating 4130 for toughness
RE: Heat Treating 4130 for toughness
The next challenge I am facing is hydrogen embittlement after Rohs Zinc plating.
We have notice a significant decrease in toughness after plating. So far we have tried baking the parts within 4 hours after plating at 375°F for 4 hours but we are still seeing the problem. I assume we need to lengthen the baking time, is there any rules for how long? Is there anything else I should be aware of with 4130?
RE: Heat Treating 4130 for toughness
"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein