SA335-P92 steel pipe is a new type of steel developed on the basis of P91 steel pipe by adding W element and reducing Mo element.
Show the chemical composition here to see the difference between P92 steel pipe and P91 steel pipe.
|
Grade |
C |
Mn |
P |
S |
Si |
Cr |
Mo |
W |
|
P91 |
0.07-0.13 |
0.3-0.6 |
0.02 |
0.01 |
0.2.0.5 |
8-9.5 |
0.85-1.05 |
- |
|
P92 |
0.07-0.13 |
0.3-0.6 |
0.02 |
0.01 |
0.2.0.5 |
8-9.5 |
0.35-0.55 |
1.5-2 |
P91 steel pipe has excellent corrosion resistance, oxidation resistance and good high temperature strength and creep properties, and its heat fatigue resistance is better than that of austenitic stainless steel. However, it is difficult to weld, and it is prone to crack defects.
P92 steel pipe has strict technical requirements for preheating, welding current, interlayer thickness, weld width, post-weld treatment, etc.
