The A335 P11 Tube is a high-performance alloy steel pipe designed for high-temperature and high-pressure applications. Made from premium P11 alloy steel, our A335 P11 Alloy Steel Tube offers excellent mechanical strength, corrosion resistance, and durability. Manufactured in compliance with international standards such as ASTM A335, DIN, and GB/T, it ensures reliability for critical industrial operations. Each pipe undergoes stringent testing including chemical analysis, tensile and yield strength verification, hardness testing, and non-destructive inspection. Material certificates, third-party inspection reports, and quality documentation are provided to assure buyers of consistent quality.
Product Details
Specifications and Technical Details
Basic Product Information
| Item | Details |
| Standard | ASTM A335 / ASME SA335 |
| Grade | P11 |
| Type | Alloy Steel Seamless Pipe |
| Manufacturing Process | Hot Rolled / Cold Drawn |
| Outer Diameter | 1/8" – 24" (10.3 mm – 610 mm) |
| Wall Thickness | SCH 20 – SCH XXS |
| Length | Random Length / Fixed Length / Customized |
| Pipe End | Plain End, Beveled End, Threaded |
| Surface Finish | Black Painted, Bare, Anti-rust Oiled |
| Heat Treatment | Full Annealing / Isothermal Annealing |
Mechanical Properties
| Property | Minimum Value |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 30% |
Chemical Composition (%)
| Element | Carbon (C) | Manganese (Mn) | Silicon (Si) | Chromium (Cr) | Molybdenum (Mo) | Phosphorus (P) | Sulfur (S) |
| Content | 0.05 – 0.15 | 0.30 – 0.60 | 0.50 – 1.00 | 1.00 – 1.50 | 0.44 – 0.65 | ≤ 0.025 | ≤ 0.025 |
Key Features and Practical Advantages
Better Heat Resistance Than Carbon Steel
Under elevated temperature conditions,P11 offers:
- Improved resistance to heat deformation
- Better dimensional stability
- Reduced risk of thermal fatigue
Easier Welding and Installation
- Better weldability with proper preheating
- Lower fabrication complexity
- Easier field installation
Good Availability for Standard Project Sizes
P11 is a commonly specified alloy pipe grade, which means:
- Standard dimensions are easier to source
- Faster replacement in maintenance projects
- More predictable production schedules
Typical Applications
Why Choose Our ASTM A335 P11 Alloy Steel Seamless Pipe?
We know that when sourcing alloy steel pipes, price isn't the only thing on your mind. You need to be sure the dimensions are spot-on, the paperwork is in order, and-crucially-that delivery won't hold up your project timeline.
That's why we prioritize full traceability. We don't just ship pipes; we provide complete documentation (including EN 10204 3.1 MTCs) and can arrange for any specific inspections you need, whether it's PMI, UT, or third-party checks.
Also, if you have non-standard requirements, just let us know. We can customize cut lengths to fit your needs, which saves you a lot of headache and cutting work on-site. Plus, our export packaging is designed specifically to ensure your goods arrive in perfect condition, no matter the distance.
Our Company Strength
Jiangsu Cunrui Metal Products Co.,Ltd has years of experience supplying alloy steel, stainless steel, and seamless steel pipe materials to international customers.
In alloy steel projects, we understand that customers are usually working against strict deadlines and technical specifications. Because of this, we pay attention not only to material quality, but also to practical supply details such as dimensional tolerance, testing documentation, and shipment coordination.
We maintain long-term cooperation with qualified mills and processing facilities, allowing us to support customized cutting, inspection requirements, and project-based packaging.
For customers purchasing ASTM A335 P11 seamless pipe, we can help confirm specifications, standards, and testing requirements before production, reducing the risk of specification mismatch after shipment.
Rather than simply exporting products, we focus on helping customers receive materials that can move directly into fabrication or installation.
FAQ
Q: What is the difference between P11 and carbon steel pipe?
A: P11 contains chromium and molybdenum, offering better heat resistance and high-temperature strength.
Q: Can you supply custom wall thickness and lengths?
A: Yes, customized dimensions can be arranged according to project requirements.
Q: What is the normal delivery time?
A: Stock sizes generally take 7–10 days; production orders typically require 20–35 days.
Q: What is ASTM A335 P11 pipe mainly used for?
A: P11 pipe is mainly used for medium and high-temperature pressure piping in power plants, boilers, and petrochemical facilities.
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