310S (0Cr25Ni20), heat-resistant stainless steel, 310S is austenitic chromium-nickel stainless steel,

It has good oxidation resistance and corrosion resistance, because it contains a high percentage of chromium and nickel,

It has high creep strength, can work continuously at high temperature, and has good high temperature resistance.

Domestic grades: 0Cr25Ni20, 0Cr25Ni20Si2, also known as 2520

US grade: 310S,

Creep strength is an indicator of high temperature performance of materials

The so-called creep means that under the action of a certain temperature and a small constant external force (tension, pressure, torsion),

The phenomenon that the deformation of the material increases gradually with the increase of time.

According to its rate, it can be divided into three stages:

Deceleration phase 

1 • The rate of creep decreases with time. Also known as the transition creep stage, it is essentially a work hardening process.

constant speed stage

2 • The creep rate is almost constant, also known as the steady-state creep stage. The steady state creep rate determines the creep life and total elongation.

accelerated creep stage

3. Creep rate increases until fracture occurs

The fundamental reason that affects the creep process lies in the properties of the material itself. But for the same material, the two important parameters of the creep process are temperature and stress.

When the stress is increased or the temperature is increased, the creep life is shortened, the deformation speed is fast, and the high temperature resistance performance is poor.