Alloy Steel Seamless Pipe ASTM A335 P91 High temperature overheated device reheater
Alloy Steel Seamless Pipe ASTM A335 P91 High temperature overheated device reheater
YUHONG GROUP deal with Austenitic Stainless Steel, Nickel Alloy Steel(Hastelloy , Monel, Inconel, Incoloy ) seamless and welded pipe and tube already more than 33 years, every year sell more than 80000 tons of steel pipe and tube. Our client already cover more than 70 countries, Like Italy, UK, Gernmany, USA, Canada, Chile, Colombia, Saudi Arabia, Korea, Singapore, Austrial, Poland, France ...
Overview
P91 alloy tube steel equivalent to the national standard 10Cr9Mo1VNb, not only has high oxidation resistance and resistance to high temperature steam corrosion, but also has a good impact toughness and high and stable long-lasting plasticity and thermal strength properties. In the use of temperature below 620 ℃, its allowable stress is higher than the austenitic stainless steel. Above 550 ℃, the recommended design allowable stress is about twice as much as T9 and 2.25Cr-1Mo steel.
A335 P91 alloy pipe is widely used, can be used as sub-critical, supercritical boiler wall temperature <625 ℃ high temperature superheater, reheater steel pipe, and wall temperature <600 ℃ high temperature collector and steam piping, but also can be used as a nuclear heat exchanger, as well as oil cracking device furnace pipe.
P1 steel is a new type of martensitic heat-resistant steel developed in cooperation with the National Oak Ridge Laboratory and the Metallurgical Materials Laboratory of the U.S. Combustion Engineering Corporation. It is based on 9Cr1MoV steel to reduce the carbon content, strictly limit the content of sulfur, phosphorus, add a small amount of vanadium, niobium elements for alloying. With P91 steel corresponding to the German steel number for the X10CrMoVNNb91, Japan's steel number for the HCM95, France is TUZ0CDVNb901.
Chemical Composition of ASTM A335 P91
| C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Mo, % | V, % | N, % | Ni, % | Al, % | Nb, % |
| 0.08-0.12 | 0.3-0.6 | 0.02 max | 0.01 max | 0.2-0.5 | 8.0-9.5 | 0.85-1.05 | 0.18-0.25 | 0.03-0.07 | 0.4 max | 0.04 max | 0.06-0.10 |
Mechanical Strength of ASTM A335 P91
| Tensile Strength , MPa | Yield Strength, MPa | Elongation, % | Hardness, HB |
| 585 min | 415 min | 20 min | 250 max |
Characteristics of ASTM A335 P91
Not only has high oxidation resistance and resistance to high temperature steam corrosion, but also has good impact toughness and high and stable lasting plasticity and heat strength properties. In the use of temperature below 620 ℃, its permissible stress is higher than the austenitic stainless steel. Above 550℃, the recommended design allowable stress is about twice of T9 and 2.25Cr-1Mo steel.
ASTM A335 P91 Application
heat exchanger
High temperature overheated device
reheater
Condenser
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