Stainless Steel Grade AISI 504 | DIN X12CrMo9-1

AISI 504 | DIN X12CrMo9-1 - martensitic grade «*stainless steel». Despite the fact that the metal of this grade is soft and ductile in the solution annealed state, it is capable of acquiring high properties after a single treatment by precipitation or aging. It is characterized by good corrosion resistance, high rigidity, viscosity and strength.

One of many grades of precipitation hardening used in industry.

Machinability

Long sticky chips characterize the machinability of this stainless metal. It can be machined in an annealed condition, but the best results are obtained in the H1150M condition. When machining under these conditions, the parts should be treated with a solution after machining before final hardening.

Heat treatment

1. Hold at 1038 °C for 30 minutes and cool to below 16 °C for complete martensitic transformation.
2. Processing of material at a temperature of 482 °C for 1 hour, cooling in air.
3. Soak the material treated with the solution for 4 hours at the specified temperature, cool in air.
4. Soak the solution treated material at 760 °C for 2 hours, air cool, then reheat to 620 °C for 4 hours and air cool.

Welding

This alloy, which is successfully welded by conventional fusion and resistance methods, should not be joined by oxyacetylene welding. If necessary, it is recommended to use filler metal.

Forging

Before forging, hold for 1 hour at 1177 °C. Do not work at temperatures below 1010 °C. After-work treatment with a solution is required before final hardening.

*Stainless steel is a steel that is resistant to corrosion in the atmosphere and aggressive environments and contains at least 10.5% chromium.