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P91 Material High Pressure Boiler Tube , Alloy Steel Pipe ASTM A335 Standard

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P91 Material High Pressure Boiler Tube , Alloy Steel Pipe ASTM A335 Standard

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Brand Name : NEW FORCE

Model Number : 48''

Certification : MTC

Place of Origin : China

MOQ : 10 tons or negotiable

Payment Terms : L/C, T/T

Supply Ability : 200000 tons per month

Delivery Time : 5~10 weeks

Packaging Details : bare and loose

Steel : Alloy Steel

Application : High Pressure Boiler

Material : P91

Standard : ASTM A335

Size : 1219mm x 140mm

OD : 48''

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P91 Material High Pressure Boiler Tube , Alloy Steel Pipe ASTM A335 Standard

Grade 91 contains 9 % Chromium and 1 % Molybdenum compared to 2.5 % Chromium in the next best P22 grade. Chromium improves high temperature strength and increases oxidation resistance. Molybdenum increases the creep resistance. Also present are smaller quantities of Nickel and Manganese which increase the hardenability of the steel.

More important than the alloying elements is the formation of this alloy steel. The steel is formed by normalizing at 1050 °C, air cooling down to 200 °C. It is then tempered by heating to 760 °C. The temperatures and the cooling rates are very important. This produces the microstructure that results in the high creep strength properties.

1. Standards

ASTM A335 ——Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

2. Application

For the high-pressure boiler and steam pipes, and the petrochemical industry pipes;
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%
20~40 -10% +10%
457~1422 ±0.9％ ＞40~70 -7％, +9％
＞70~20 -6％, +8％

4. Chemical Composition:

Grade UNS Designation Composition, %
C Mn P S Si Cr Mo Ni V Others
P91 K91560 0.08-0.12 0.30-0.60 0.02 0.01 0.20-0.50 8.00-9.50 0.85-1.05 0.4 0.18-0.25 N 0.030-0.070
Al 0.02max
Cb 0.06-0.10
Ti 0.01 max
Zr 0.01max

6. Mechanical Properties

Steel pipes No. Tensile strength Yield strength Elongation Impact energy Hardness
(Mpa) (Mpa) (%) (J)
P91 585～760 ≥415 ≥20 ≥35 ≤250HB

7. Available Size Range:

OD Thickness
mm inch mm SCH
88.9~1422 3''~ 56'' 2.11~140 ≥SCH10
*If the steel grades and size you are looking for are not listed above, please contact us for further information.

MTC sample could be provided upon request.

For additional requirements on chemical composition, mechanical properties, and supplementary requirements, please contact us for customization!

P91 Material High Pressure Boiler Tube , Alloy Steel Pipe ASTM A335 Standard


Product Tags:

seamless steel tube

      

seamless tube pipe

      
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