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Black Coating ASTM A335 P9 Alloy Seamless Steel Pipe for Superheater and Reheater

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Black Coating ASTM A335 P9 Alloy Seamless Steel Pipe for Superheater and Reheater

Brand Name : YUHONG

Model Number : ASTM A335 P9

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : China

MOQ : 500KGS

Price : Negotiable

Payment Terms : ,L/C,T/T

Supply Ability : According to Clients' requirements

Delivery Time : Depend on quantity

Packaging Details : Ply-wooden Case /Iron Case/ Bundle with plastic Cap

Product Name : Alloy Seamless Steel Pipe

Specification : ASTM A335

Material : P9

Type : Seamless

Ends : Plain End, Beveled End

Surface : Pickled And Annealed, Polished, Bright Annealed, Black Painting

NDT : MT, ET, HT, PT, PMI

Application : Superheater, Reheater, Boiler, Heat exchanger

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Black Coating ASTM A335 P9 Alloy Seamless Steel Pipe for Superheater and Reheater

A Black-Coated ASTM A335 P9 Alloy Seamless Steel Pipe is a chromium-molybdenum alloy steel pipe designed for high-temperature and high-pressure service. The pipe body offering excellent high-temperature strength, oxidation resistance, and sulfidation corrosion resistance. The external surface of the pipe undergoes a specialized "phosphating and saponification" treatment, which creates a uniform, adherent black protective coating. This coating primarily serves as temporary anti-corrosion protection during transportation, storage, and installation, and can also act as a lubricant to reduce friction during certain machining or handling processes. It is critical to note that this black coating is not a permanent high-temperature corrosion-resistant layer. It is typically required to be removed prior to the pipe being placed into high-temperature service, in accordance with specific system design and commissioning procedures.


ASTM/ASME UNS JIS G3458 UNS BS DIN 17175 ISO
A335 P9/ SA335 P9 K90941 STPA 26 S50400 3604 P1 629-470 X12CrMo91 2604 II TS38


1.Chemical & Mechanical Properties

ASTM A335 P9 Chemical Composition (%) 
C Mn P S Si Cr Mo

≤0.15%

 0.3%~0.6% ≤0.025%

≤0.025%

0.25%-1.00%

 8.0%~10.0%

0.90%~1.10%


Mechanical Properties

Tensile Strength ksi/MPa Yield Strength (0.2% offset)
ksi/MPa
 Hardness HBW
Heat Treatment Requirements
℉/℃
≥60/415 ≥30/205 ≤250 1250/675


Elongation(%)
Wall Thickness
Longitudinal
Transverse
in.
 mm
5 ⁄16  (0.312)

8

 30 20
9 ⁄32 (0.281)
 7.2 28 19
1 ⁄4  (0.250)
 6.4 27 18
7 ⁄32  (0.219)
 5.6 26 ...
3 ⁄16  (0.188)
 4.8 24 ...
5 ⁄32  (0.156)
 4 22 ...
1 ⁄8  (0.125)
 3.2 21 ...
3 ⁄32  (0.094)
 2.4 20 ...
1 ⁄16  (0.062)
 1.6 18 ...


2. Key Adventages

  • High-Temperature Strength: With its chromium and molybdenum content, P9 tubes exhibit excellent resistance to oxidation, creep, and deformation even under extreme temperatures.
  • Corrosion Resistance: Chromium provides superior resistance to oxidation and scaling, while molybdenum enhances corrosion resistance, particularly in acidic environments; Long service life with reduced maintenance costs.
  • Seamless Construction: The seamless design ensures superior strength, uniformity, and durability compared to welded tubes, making it ideal for critical applications.


3. Key Applications

  • Food Processing Equipment
  • Radiant Tubes
  • Coal Gasifier Internal Component
  • Oven Linings
  • Furnace Parts
  • Annealing Cover
  • Saggers
  • Heat Exchangers


ASTM A335 Grade P9 Pipe Sizes

O.D. x Thickness(mm) O.D x Thickness(mm) O.D x Thickness(mm)
38.1 x 3.2 57.0 x 4.9 76.2 x 4.0
38.1 x 4.0 57.0 x 6.3 76.2 x 5.0
38.1 x 6.3 57.0 x 7.9 76.2 x 6.3
42.4 x 3.2 60.3 x 3.2 82.5 x 4.5
42.4 x 4.0 60.3 x 3.6 88.9 x 3.2
44.5 x 3.2 60.3 x 5.0 88.9 x 3.6
44.5 x 6.3 63.5 x 3.2 88.9 x 4.0
48.3 x 3.2 63.5 x 3.6 101.6 x 3.6
48.3 x 3.6 63.5 x 4.0 101.6 x 4.5
50.8 x 4.5 63.5 x 6.3 101.6 x 6.3
51.0 x 3.2 63.5 x 7.9 114.3 x 3.6
51.0 x 3.6 70.0 x 3.2 114.3 x 5.0
51.0 x 6.3 70.0 x 3.6 139.7 x 4.0
57.0 x 3.2 70.0 x 6.3 139.7 x 5.0
57.0 x 3.6 76.2 x 3.6 139.7 x 6.3



Black Coating ASTM A335 P9 Alloy Seamless Steel Pipe for Superheater and Reheater


Product Tags:

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