ASTM A335 P11 Alloy Steel Seamless Pipe for High-Pressure Boiler in DN30-DN400 Sizes
ASTM A335/A335M P11 Alloy Seamless Steel Pipe For High-Pressure Boiler
Product Description
Introduction
ASTM A335 /A335M ASME SA335 pipes shall be made by the seamless process and shall be either hot-finished or cold drawn with the finishing treatment.
ASTM A335 /A335M covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature service.
Referenced Documents
ASTM A 999/A999M specification for general requirements for alloy and stainless-steel pipe
E92 Test method for Vickers hardness of metallic materials
E213 practice for ultrasonic testing of metal pipe and tubing
E309 practice for Eddy-Current examination of steel tubular products using magnetic saturation
E381 method of macro etch testing steel bars, billets, blooms, and forgings
Chemical Composition
| Grade | C | Mn | P | S | Si | Cr | Mo | V | Nb | N | Al | others | ||
| P11 | 0.05-0.15 | 0.30-0.60 | ≤0.025 | ≤0.025 | 0.50-1.00 | 1.0-1.50 | 0.44-0.65 | / | / | / | / | / | ||
| P12 | 0.05-0.15 | 0.30-0.61 | ≤0.025 | ≤0.025 | ≤0.50 | 0.80-1.25 | 0.45-0.65 | / | / | / | / | / | ||
| 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 | 8.0-9.50 | 0.85-1.05 | 0.18-0.25 | 0.030-0.070 | ≤0.40 | ≤0.02 |
Cb 0.06-0.10
Ti 0.01max
Zr 0.01max
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Chemical Composition
Heat Treatment Requirements
| Grade | P11 | P12 | P22 | P91 |
| UNS Number | K11597 | K11562 | K21590 | K91560 |
| Heat Treat Type | full or isothermal anneal normalize and temper | full or isothermal anneal normalize and temper subcritical anneal | full or isothermal anneal normalize and temper |
normalize and temper quench and temper |
|
Austenitizing/ Solutioning Temperature, min or range °F [°C] |
… | … | … |
1900-1975[1040-1080] 1900-1975[1040-1080] |
|
Subcritical Annealing or Tempering Temperature, Min or range °F [°C] |
1200 [650] |
1200 [650] 1200-1300 [650 to 705] |
1250 [675] |
1350-1470[730-800] 1350-1470[730-800] |
Tensile Requirements and Hardness
| Grade | Tensile | Yield | Elongation | Hardness |
| Strength (Mpa) | Strength (Mpa) | (%) | ||
| P11 P12 | ≥415 | ≥220 | ≥30 | ≤89HRB |
| P22 | ≥415 | ≥200 | ≥30 | ≤89HRB |
| P91 | ≥585 | ≥415 | ≥20 | 91HRB-25HRC |
Material & Manufacture
Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.
Heat Treatment
- A / N+T
- N+T / Q+T
- N+T
Mechanical Tests Specified
- Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test
- For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested.
- For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe.
Notes for Hardness Test:
- P11 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].
Are you a factory or a trading company?
We are a company with two mill and one warehouse,produce Stainless Steel/(Super)Duplex Steel/ Nickel Alloy seamless tube&pipes.
But we also can provide welded stainless steel pipes and pipe fittings, coils, sheets, bar, plates etc. if you need. Because we know this market well
Do you have any certificate?
We have approvals of ISO9001:2015,ISO14001:2015,ISO45001:2018, BV Ocean& Offshore Ship Classification Societies, GOST, TUV, PED AD2000 etc.
And will get ABS/NORSOK/DNV/CU-TR(EAC) soon.
What is your delivery time?
It mainly depends on your demanded volume and material grade. The time of delivery is usually around0.5- 1 month(1*40HT as usual).
We can send it out in 5 days if it has stock.
What is your payment terms?
Our usual payment term is 30% deposit and the rest against B/L. L/C is also acceptable. And the shipping terms are EXW,FOB, CFR,CIF.Whichever you like.
How can you guarantee the quality of my goods?
All material are 100% PMI tested and measured before shipping. We also accept third part inspection andEN10204.3.1B Mill test certificate for all materials.
How do you make our business long-term and good relationship?
1.We keep good quality and competitive price to ensure our customers benefit.
2. We respect every customer and we sincerely do business with them, sustain our service level before and after every deal.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.