Hydraulic Press Brake For Sale

We have been producing press brakes for more than 20 years and have rich experience. At the same time, we have established deep relationships with various global technology and parts partners to ensure the stable operation of the press brakes we sell.

Press Brake

NC Press Brake

If you have limit budget, the NC press brake will be a good choice for you to finish sheet metal bending.

Press Brake

CNC Press Brake

CNC press brake has much higher accuracy, efficiency than NC press brake when bending metal plate.

Robotic Press Brake

Robotic Press Brake

Robotic press brake It can efficiently and accurately complete the automatic bending of sheet metal.

Stress relief of stainless steel 304 after bending

Stainless steel 304 is a Japanese brand, equivalent to 00Cr19Ni10 in China. It belongs to austenitic stainless steel.

The stress relief treatment of austenitic stainless steel is a heat treatment process to eliminate the residual stress of steel after cold working or welding. It is generally heated to 300 ~ 350 ℃ for tempering.

For steels without stabilizing elements Ti and Nb, the heating temperature shall not exceed 450 ℃, so as not to precipitate chromium carbides and cause intergranular corrosion.

For the cold worked and welded parts of ultra-low carbon and alloy Ti and Nb stainless steel, it is necessary to heat at 500 ~ 950 ℃ and then cool slowly to eliminate the stress (the upper limit temperature is taken for the elimination of welding stress), which can reduce the tendency of intergranular corrosion and improve the stress corrosion resistance of the steel.

Therefore, if you want to de stress 304, the reasonable temperature is between 300 ~ 350 ℃, generally 1.5 ~ 2.5 hours / 100mm effective section.

Your question is to remove the stress after bending. Why do you want to remove the stress after bending?

I don’t think so.

If you bend it, you can straighten it without stress relief, because the deformation of austenitic stainless steel will not lead to structural changes, and there is no stress!

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