ASTM A335 P91 Alloy Steel Boiler Tube
GNEE is one of the leading manufacturers, suppliers and exporters of A335 P91 Alloy Steel Pipes, these seamless pipes use high quality materials.
A335 P91 alloy steel contains 9% chromium and 1% molybdenum and thus has high strength compared to its predecessor T22 or P22 grades and can withstand temperatures up to 600 °C. The oxidation temperature limit is also higher, allowing designs with smaller thicknesses. A335 P91 alloy steel pipes have a tensile strength of 620 MPa and a yield strength of 440 MPa.
335 P91 boiler tubes have good comprehensive mechanical properties, good welding properties and good processing properties and are suitable for high temperature and pressure applications such as oil services, petrochemical plants, steam pipelines, power plant boilers.
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A335 P91 Seamless boiler tube Product specification
A335 P91 Tubing Equivalent Material
| ASTM | DIN | JIS | GB |
| T91 | X10CrMoVNNb91 | STBA 26 | 10Cr9Mo1VNbN |
A335 P91 Alloy boiler tubes Chemical Composition
| Grade | C | Mn | P,≤ | S,≤ | Si | Cr | Mo |
| P91 | 0.05–0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.50–1.00 | 2.65–3.35 | 0.80–1.06 |
A335 P91 Steel boiler tubes Mechanical Properties
| Material | Yield strength
ReH/Rp0,2 N/mm² min |
Tensile strength
Rm N/mm² |
Elongation A
% min |
| P91 | 220Mpa | 415Mpa | 30 |
A335 P91 Seamless alloy steel pipe
Why choose us
Gnee has 14 steel production lines, 10 processing equipment for processing, bending, painting, heat treatment, cutting, drilling, beveling, tempering, surface treatment, complete testing equipment and strong technical force. The annual production capacity is more than 60,000 tons.
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