Xi'an LETRY specializes in the production of electronic slow strain rate high-temperature high-pressure hydrogen embrittlement stress corrosion testing machines. These machines are primarily used to accurately determine the susceptibility of metals to sulfide-induced stress corrosion cracking under H2S conditions. They can also be employed for testing and researching the mechanical properties of metal materials, such as static sustained tensile, creep, and stress corrosion tests. They are suitable for determining the stress corrosion failure characteristics of metals in various media environments, including NaOH, NO3-, H2S, Cl- solutions, methanol, N2O4, NH3, humid air, and water.

They provide an accelerated testing method to determine the stress corrosion sensitivity of ductile materials under conditions where stress corrosion cannot be rapidly induced through constant load or constant deformation testing methods.

Main technical specifications and parameters:

1. Maximum test force: 50kN

2. Test force range: 1--100%, full range without grading

3. Accuracy class: Grade 1; indication accuracy better than ±1%

4. Equipped with threaded connection fixtures (two types) and pin-type connection fixtures with automatic centering devices;

5. Speed accuracy better than ±1%, indication accuracy better than ±1%, deformation and displacement accuracy better than ±0.5%.

6. The tensile speed for slow strain rate tests can be continuously adjusted between 10-6 and 1mm/min.

7. Test tensile space: 0-400mm, adjustable test space

8. Test control methods: force, time, loading rate, step (multi-stage) loading

9. Test environment control temperature: room temperature to 300°C

10. Reactor pressure capacity: 10MPa

The fracture speed lies between pure corrosion and pure mechanical failure, with fractures generally being brittle. Hydrogen embrittlement (HE), also known as hydrogen-induced cracking or hydrogen damage, is a phenomenon where hydrogen in metal materials leads to reduced plasticity, cracking, or damage. The corrosive medium is specific, and stress corrosion fracture only occurs under certain metal-medium combinations. Without stress, the corrosion rate of metals in their specific corrosive media is minimal.