High Pressure Boiler Tube Alloy Steel ASTM A335 P92 56'' 1422mm x
In order to improve the heat efficiency of reheating steam pipeline
in power plant, the reheating-temperature can be designed as high
as 621°C, which is known as the super-critical temperature. The
Unite States firstly developed ASTM A335 P92 alloy steel in late
1980’s to meet the heat-resisting requirements of such a
high-temperature power unit. The alloy steel P92 is an improved
version of ASTM A335 P91 alloy which has deliberate addition of
tungsten, vanadium, niobium, decreased amount of molybdenum to
fine-tune to ferrite/austenite ratio, as well as carefully
controlled amount of boron and nitrogen.
ASTM A335 ——Standard Specification for Seamless Ferritic
Alloy-Steel Pipe for High-Temperature Service
For the high-pressure boiler and steam pipes, and the petrochemical
Power plant; Chemical Fertilizer; Petrochemicals; Offshore Oils;
Gas Productions; Refineries and etc.
3. Dimensional Tolerance
|Pipe types||OD (mm)||Tolerance||WT (mm)||Tolerance|
|High Pressure Boiler Tube||219~457||±1.0%||≤20||-10% ~ +12.5%|
5. Chemical Composition:
|Grade||UNS Designation||Composition, %|
|P92||K92460||0.07-0.13||0.30-0.60||0.02||0.01||0.50 max||8.50-9.50||0.30-0.60||0.4||0.15-0.25||N 0.03-0.07|
|Al 0.02 max|
|Ti 0.01 max|
|Zr 0.01 max|
6. Mechanical Properties
|Steel pipes No.||Tensile strength||Yield strength||Elongation||Impact energy||Hardness|
7. Available Size Range:
|*If the steel grades and size you are looking for are not listed
above, please contact us for further information.|
MTC sample would be provided upon request.
For additional requirements on chemical composition, mechanical
properties or supplementary requirements, please contact us for customization!