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ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
Specifications
Brand Name :
YUHONG
Model Number :
ASTM A335 P9 Alloy Steel Seamless Pipe
Certification :
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin :
CHINA
MOQ :
500kgs
Payment Terms :
L/C,T/T
Delivery Time :
7 DAYS
Packaging Details :
Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Product Name :
Boiler Tube
Standard :
ASTM A335 / ASME SA335
Material :
P9 / 1.7386 / X11CrMo9-1
OD :
1/2" ~24"
Thickness :
sch5S to sch.XXS
Length :
Single Random, Double Random & Cut Length
End :
Plain End, Beveled End
High Light :
ASTM A335 P9 Alloy Steel Seamless Pipe, CrMo Alloy Boiler Tube
Description

ASME SA335 / ASTM A335 Grade P9 / 1.7386 / X11CrMo9-1 Alloy Steel Heat Exchanger Tube

YUHONG is professional supplier of alloy steel pipes and tubes, covering T5, T9,T11,T22,T91,T92 and equivalent "P" series grades, used in boiler, heat exchanger, power plant ... ASTM A335 P9 (1.7386) is an excellent choice for a high-temperature boiler tube when you need oxidation resistance beyond what 2.25Cr (P22) can provide, but you do not require the highest creep strength of P91. However, be prepared for strict welding procedures (preheat + PWHT) and know that its creep strength above 590°C (1100°F) is limited. For supercritical or ultra-supercritical boilers, upgrade to P91.

Equivalent Grades of ASTM A335 / ASME SA335 Grade P9 Alloy Steel Seamless Pipe Boiler Tube

Standard

UNS

Werkstoff / DIN

EN

JIS

BS
ASTM A335/ ASME SA335 P9 S50400 1.7386 X11CrMo9-1 STPA 26 3604 P1 629-470

Chemical Compositions % of ASTM A335 / ASME SA335 Grade P9 Alloy Steel Seamless Pipe Boiler Tube

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 of ASTM A335 / ASME SA335 Grade P9 Alloy Steel Seamless Pipe Boiler Tube

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

Quick Comparison Table: Advantage vs. Other Grades

Property vs. Carbon Steel (e.g., A106) vs. P11/P22 (1.25-2.25Cr) vs. P91 (9Cr-1Mo-V)
Oxidation limit Much higher Higher Similar
Creep strength Much higher Moderately higher Lower (but P91 is superior)
Cost Higher Slightly higher Lower (~30-50% less than P91)
Weldability Worse (needs PWHT) Similar Better (more forgiving than P91)


Application

  • Power generation boilers – Superheater and reheater tubes, especially in coal- or oil-fired units where high chromium content resists oxidation from flue gases.

  • Header pipes and steam lines – Moderate-temperature main steam piping (typically up to ~590°C / 1100°F).

  • Petrochemical furnaces – Hydrogen reformer tubes and furnace coils that require resistance to hydrogen attack and high-temperature sulfidation.

  • Heat exchangers – Shell-and-tube exchangers exposed to hot corrosive gas streams.

  • Refinery high-temperature piping – Transfer lines and heater tubes in crude oil heaters and coker units.

ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
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ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature

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Product Detail
Brand Name :
YUHONG
Model Number :
ASTM A335 P9 Alloy Steel Seamless Pipe
Certification :
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin :
CHINA
MOQ :
500kgs
Payment Terms :
L/C,T/T
Contact Supplier
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature
ASTM A335 P9 Alloy Steel Seamless Pipe 1.7386 CrMo Alloy Boiler Tube for High Temperature

YUHONG HOLDING GROUP CO., LTD

Verified Supplier
3 Years
ningbo
Since 1990
Business Type :
Manufacturer, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Stainless Steel Heat Exchanger Tube, Studded Tube, Duplex Stainless Steel Heat Exchanger Tube
Total Annual :
50M-70M
Employee Number :
50~800
Certification Level :
Verified Supplier
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