ASTM A335/A335m Seamless Ferritic Alloy-Steel Pipe with High-Temperature Service

• Customization: Available
• Type: Seamless
• Technique: Cold Drawn
• Model NO.: EZS
• Material: Carbon Steel
• Surface Treatment: Varnishing
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Standard: ASTM, GB, JIS
• Standard2: ASTM A106-2006, ASTM A210-1996, ASTM A213-2001, as
• Application: Boiler Pipe
• Delivery Condition: Annealed, Normalized, Normalized and Tempered
• Inspections and Tests Performed: Ut, Rt, Et
• 3-Rd Party Inspection: TUV, SGS, Ibr, BV etc
• Treatment: Pickled, Annealed, Polished
• End Type: Plain Ends, Bevel End, Threaded End
• Materials: A179/A192
• Aplication 1: Industrial Heating and Drilling
• Aplication 2: Heat Exchanger
• Aplication 3: Metel Treatment System
• Aplication 4: High Temperature Geberater Tube
• Aplication 5: Boiler
• Delivery Time: Within 7-30 Days
• Transport Package: Wooden Box/ PVC Bags/ Steel Strips/Plastic Plates
• Specification: OD: 8-168.3mm, WT: 1-15mm
• Trademark: EZS
• Origin: China
• Production Capacity: 300000t/Year

Product Description

ASTM A335/A335M for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

This specification covers seamless ferritic alloy-steel pipes intended for high-temperature service. The pipe is suitable for bending, flanging, and similar forming operations. Grades include P5, P9, P11, P12, P22, P91, P92, P122, etc., with varying chemical compositions and mechanical properties.

Specification

Main Grades in ASTM A335/A335M

| Grade | UNS Number | Key Alloy Composition | Common Applications |  
| P1    | K11522       | 0.5Mo                    | Low-alloy boilers, piping |  
| P2    | K11547       | 0.5Cr-0.5Mo              | Power plants, refineries |  
| P5    | K41545       | 5Cr-0.5Mo                | High-temp/pressure service |  
| P9    | S50400       | 9Cr-1Mo                  | Petrochemical, boilers |  
| P11   | K11597       | 1.25Cr-0.5Mo-Si          | Power generation, steam lines |  
| P12   | K11562       | 1Cr-0.5Mo                | Similar to P11, boilers |  
| P21   | K31545       | 3Cr-1Mo                  | High-temp strength |  
| P22   | K21590       | 2.25Cr-1Mo               | Widely used in power plants |  
| P91   | K91560       | 9Cr-1Mo-V-Nb             | Advanced high-temp/pressure |  
| P92   | K92460      | 9Cr-2W-0.5Mo-V-Nb        | Ultra-supercritical boilers |  
| P122  | K91640     | 11Cr-2W-1Cu-Mo-V-Nb      | High-efficiency power plants |

Key Notes:  
- Grades P5 to P92 are chromium-molybdenum (Cr-Mo) steels, offering increasing resistance to oxidation and creep at elevated temperatures.  
- P91, P92, and P122 are advanced high-strength steels used in modern power plants for ultra-supercritical (USC) applications.  
- P1 and P2 are lower-alloy grades for less severe conditions.  

These grades are selected based on temperature, pressure, and corrosion resistance requirements in industries like power generation, oil & gas, and petrochemical plants.  

Test Requirements

- Hydrostatic Testing: Each pipe must withstand a specified hydrostatic pressure without leakage.  
- Nondestructive Electric Testing (NDE): Optional unless required (e.g., eddy current, ultrasonic testing).  
- Flattening Test, Bend Test, or Flange Test: Required for certain sizes and grades.  
- Impact Testing: Required if specified (e.g., for low-temperature service).

Technical Specifications

ASTM A335-for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

ASTM A519-for Seamless Carbon and Alloy Steel Mechanical Tubing

ASTM A213-for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Super heater, and Heat-Exchange Tubes

ASTM ASME (S)A-335/(S)A-335M Grade and Chemical Composition

Grade	UNS	C≤	Mn	P≤	S≤	Si≤	Cr	Mo
P1	K11522	0.10~0.20	0.30~0.80	0.025	0.025	0.10~0.50	-	0.44~0.65
P2	K11547	0.10~0.20	0.30~0.61	0.025	0.025	0.10~0.30	0.50~0.81	0.44~0.65
P5	K41545	0.15	0.30~0.60	0.025	0.025	0.50	4.00~6.00	0.44~0.65
P5b	K51545	0.15	0.30~0.60	0.025	0.025	1.00~2.00	4.00~6.00	0.44~0.65
P5c	K41245	0.12	0.30~0.60	0.025	0.025	0.50	4.00~6.00	0.44~0.65
P9	S50400	0.15	0.30~0.60	0.025	0.025	0.50~1.00	8.00~10.00	0.44~0.65
P11	K11597	0.05~0.15	0.30~0.61	0.025	0.025	0.50~1.00	1.00~1.50	0.44~0.65
P12	K11562	0.05~0.15	0.30~0.60	0.025	0.025	0.50	0.80~1.25	0.44~0.65
P15	K11578	0.05~0.15	0.30~0.60	0.025	0.025	1.15~1.65	-	0.44~0.65
P21	K31545	0.05~0.15	0.30~0.60	0.025	0.025	0.50	2.65~3.35	0.80~1.60
P22	K21590	0.05~0.15	0.30~0.60	0.025	0.025	0.50	1.90~2.60	0.87~1.13
P91	K91560	0.08~0.12	0.30~0.60	0.020	0.010	0.20~0.50	8.00~9.50	0.85~1.05
P92	K92460	0.07~0.13	0.30~0.60	0.020	0.010	0.50	8.50~9.50	0.30~0.60

Marking

Each pipe must be marked with:  
- Manufacturer's name or trademark  
- ASTM designation (A335 or A335M)  
- Grade (e.g., P11, P22)  
- Heat number  
- Size and schedule

Company Profile

Why Choose Us?

Other Products

We pride ourselves on fostering a team of over 500 skilled professionals, including metallurgical engineers, welding specialists, and quality assurance experts. Continuous investment in employee development ensures our workforce stays ahead of industry trends through regular certifications (e.g., ASME, AWS), cross-functional training, and participation in global technical exchanges. Our management philosophy attracts top-tier talent, combining decades of hands-on experience with youthful innovation to drive sustainable growth.

EZ Steel Industrial Co., Ltd is a leading manufacturer of high-performance industrial metal pipelines, specializing in alloy steel, carbon steel, stainless steel, and copper-nickel-based alloy products. With strategically located facilities in Cangzhou, Yangzhou, and Lishui, we deliver globally trusted piping solutions that combine cutting-edge technology, rigorous quality control, and unmatched expertise.

FAQ

Q: What's your minimum order quantity?
A: Our minimun quantity is 500 Kg. We also can offer you samples.
Q: What's your delivery time?
A: Our normal delivery time is 7-30 days, and it depends on your quantity and items. Of course, if you need products urgently, we also will consider arranging it firstly.
Q: What's the price of your product?
A: Our prices are based on the material grade, size, quantity and physical performance etc. So if you can offer us the detailed information, then we can give you the best reasonable price. Also, we can do special size and color for customers.
Q: What's your after-sales service?
A: We have two ways to handle claims by replacement and deduction. Of course, if the materialis not good used by wrong parameter from customer, we won't be responsible.
Q: Why do you think I will want to buy from you?
A: We have advantages with 25 years of professional experiences in manufacturing & designing, advanced technology & the first-class equipment, perfect logistics management, high-quality after-sales service and competitive price.