ASTM A335 P5, P9, P11, P22, P91 Alloy Steel Seamless Pipe
Dimensional & Technical Parameters
Outer Diameter: 1/4 "-36" (21.3 mm-914mm)
Wall Thickness: SCH 20, 40, 80, 120, 160, XXS (custom available)
Length: Fixed (5.8/6/11.8/12m) or random length
Ends: Plain ends, beveled ends for welding
Surface Treatment: Black bare, oiled, varnish, or galvanized;3LPE;FBE
Heat Treatment:
P5, P9, P11, P22 - Fully annealed or isothermal annealed
P91 - Normalized + tempered
|
Grade |
Typical Service Temp. |
Main Applications |
|
P5 |
Up to 600°C |
Refinery heaters, cracking tubes, high-temp piping |
|
P9 |
Up to 650°C |
High-temp corrosive service, petrochemical |
|
P11 |
Up to 550°C |
Power plant steam lines, boiler headers |
|
P22 |
Up to 575°C |
Superheater tubes, main steam lines |
|
P91 |
Up to 650°C |
Ultra-supercritical power plants, high-efficiency boilers |
|
Item |
Specification |
|---|---|
|
Standard |
ASTM A335 / ASME SA335 |
|
Material Grade |
P1, P5, P9, P11, P12, P22, P91, etc. (customizable according to requirements) |
|
Outer Diameter (OD) |
16mm - 1016mm (1/8 inch - 40 inches), customizable |
|
Wall Thickness (WT) |
2mm - 120mm, nominal wall and minimum wall available |
|
Length |
5.8m, 6m, 11.8m, 12m, or customized (fixed length, random length) |
|
Chemical Composition (Typical, %) |
P1: C 0.10-0.20, Si 0.10-0.50, Mn 0.30-0.80, P≤0.025, S≤0.025, Cr 0.44-0.65, Mo - P5: C≤0.15, Si≤0.50, Mn 0.30-0.60, P≤0.025, S≤0.025, Cr 4.00-6.00, Mo 0.45-0.65 P11: C 0.05-0.15, Si 0.50-1.00, Mn 0.30-0.60, P≤0.025, S≤0.025, Cr 1.00-1.50, Mo 0.45-0.65 P22: C 0.05-0.15, Si≤0.50, Mn 0.30-0.60, P≤0.025, S≤0.025, Cr 1.90-2.60, Mo 0.87-1.13 P91: C 0.08-0.12, Si 0.20-0.50, Mn 0.30-0.60, P≤0.020, S≤0.010, Cr 8.00-9.50, Mo 0.85-1.05, V 0.18-0.25 |
|
Mechanical Properties (Minimum) |
Tensile Strength: 380-585 MPa (varies by grade) Yield Strength: 205-415 MPa (varies by grade) Elongation: ≥30% Hardness: ≤207 HB (after heat treatment) |
|
Heat Treatment |
P5/P9/P11/P22: Full/isothermal anneal, normalize and temper (tempering temp: 650-675℃) P91: Normalize (1040-1080℃) and temper (730-800℃), or quench and temper |
|
Surface Treatment |
Anti-rust oil coating, black paint, 3PE/epoxy powder coating, thermal zinc spraying |
|
Application Temperature Range |
P5: ≤ 450 ℃; P9: 450-500 ℃; P11: 450-550 ℃; P22: 500-600 ℃; P91: 550-650 ℃ |
|
Testing Standard |
Hydrostatic test, ultrasonic test, eddy current test, tensile test, hardness test, impact test |
Main Export Markets
We supply ASTM A335 P-series pipes to customers worldwide, with key markets including:
🌍Middle East - Saudi Arabia, UAE, Kuwait, Qatar (oil & gas, petrochemical)
🌏Asia Pacific - India, South Korea, Singapore, Indonesia, Vietnam (power plants, refineries)
🧭Europe - Germany, Italy, UK, Poland, Netherlands (energy infrastructure, chemical plants)
🌎North America - USA, Canada, Mexico (power generation, industrial piping)
🌍Africa - Nigeria, Algeria, Egypt, South Africa (oil & gas, mining, power)
🌎South America - Brazil, Chile, Argentina (refinery upgrades, thermal power)
Quality Assurance & Certifications
-100% ultrasonic, eddy current, or hydrostatic testing
-Mill test certificate (MTC) as per EN 10204 3.1 / 3.2
-Material traceability from ladle to final product
-Certified to ISO 9001:2015, PED 2014/68/EU, ASME, API
Technical Date
Chemical Composition (Typical, wt%)
|
Grade |
C |
Mn |
P |
S |
Si |
Cr |
Mo |
Others |
|
P5 |
≤ 0.15 |
0.30-0.60 |
≤ 0.025 |
≤ 0.025 |
≤ 0.50 |
4.0-6.0 |
0.45-0.65 |
- |
|
P9 |
≤ 0.15 |
0.30-0.60 |
≤ 0.025 |
≤ 0.025 |
0.25-1.00 |
8.0-10.0 |
0.90-1.10 |
- |
|
P11 |
0.05-0.15 |
0.30-0.60 |
≤ 0.025 |
≤ 0.025 |
0.50-1.00 |
1.00-1.50 |
0.44-0.65 |
- |
|
P22 |
0.05-0.15 |
0.30-0.60 |
≤ 0.025 |
≤ 0.025 |
≤ 0.50 |
1.90-2.60 |
0.87-1.13 |
- |
|
P91 |
0.08-0.12 |
0.30-0.60 |
≤ 0.020 |
≤ 0.010 |
0.20-0.50 |
8.00-9.50 |
0.85-1.05 |
V 0.18-0.25, Nb 0.06-0.10, N 0.03-0.07 |
Mechanical Properties (Typical)
|
Grade |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
|
P5 |
≥ 415 |
≥ 205 |
≥ 30 |
|
P9 |
≥ 415 |
≥ 205 |
≥ 30 |
|
P11 |
≥ 415 |
≥ 205 |
≥ 30 |
|
P22 |
≥ 415 |
≥ 205 |
≥ 30 |
|
P91 |
≥ 585 |
≥ 415 |
≥ 20 |
