1Cr12Ni3MoVN (S/SJ2) is martensitic heat resistant steel, which is imported from Rolls-Royce Company in China.The vacuum-smelted [SCALE STEEL]1Cr12Ni3MoVNA is codenamed S/SJV.
S/SJ2 steel is 12%Cr type low carbon martensitic heat resistant steel.Adding Mo, V and N to steel can improve the high temperature[SCALE STEEL] performance of steel.The addition of Ni to steel is mainly used to equalize δ-phase free ferrite.
C 0.08~0.13 Cr 11.00~12.50
Si ≤0.35 Ni 2.00~3.00
Mn 0.50~0.90 Mo 1.50~2.00
P ≤0.030 V 0.25~0.40
S ≤0.020 N 0.020~0.040
The performance characteristics of：
S/SJ2 is similar to China's GX-8, mainly having the following three characteristics:
(1) It has obvious tempering brittleness [SCALE STEEL]zone: 450~550℃.
(2) It has good comprehensive properties: plasticity, fatigue performance, endurance
performance, creep performance, corrosion resistance, weldability and formability.
Considering the metallographic structure, the steel is already on the martensitic-ferrite boundary. Therefore, the increase of any ferrite forming element will obviously affect the ferrite content in the steel, and have a bad effect on[SCALE STEEL] the mechanical properties of the steel.
S/SJ2 is usually in service at a temperature of about 500℃. It is used to manufacture high pressure casing, inlet casing, combustion chamber casing, diffusion casing, exhaust mixer, mounting edge, support seat, [SCALE STEEL]high pressure 1~2 static blades and other components of Spey engine.