Oxidation Resistance Seamless Welded Pipe Welded Steel Pipe For High Temperature Service

ASTM A335 P11 Seamless Welded Pipe for High-Temperature Service

1. About ASTM A335 P11 Pipe

Trade Name: 1 ¼ Chrome
Grade: P11
UNS #: K11597
Pipe: A335/SA335
Forged/Bored Pipe: A369/SA369

Chromium and molybdenum are important elements of P11. Chromium, or chrome, improves high-temperature strength, increases oxidation resistance and raises the tensile, yield and hardness at room temperatures. Molybdenum increases the strength, elastic limit, resistance to wear, impact qualities and hardenability. It increases the resistance to softening, restrains grain growth and makes chromium steel less susceptible to embrittlement. Moly is also the most effective additive for increasing high temperature creep strength, or creep resistance. It also enhances the corrosion resistance of steel and inhibits pitting.

2. Outside Diameter & Tolerance

3. P11 Pipe Chemical Requirements

• Carbon - 0.05% - 0.15%
• Manganese - 0.30% - 0.60%
• Phosphorus, max - 0.025%
• Sulfur, max - 0.025%
• Silicon – 0.50% - 1.00%
• Chromium - 1.00% - 1.50%
• Molybdenum - 0.44% - 0.65%

4. Enhanced properties of A335/SA335 P11

• Toughness
• Strength
• Hardness
• Wear resistance
• Hardenability
• Hot hardness
• Corrosion resistance

Heat treating can be required to achieve some of these properties.

5. P11 Pipe Specifications

• Tensile strength, min, PSI, (MPa) – 60,000 (415)
• Yield Strength, min, (MPa) – 30,000 (205)

6. P11 Pipe Applications

Due to the ferrimagnetic characteristics of iron, a few steel alloys in A335 P11 pipes can be used in applications where their reactions to magnetism are important. This includes transformers and electric motors. P11 is also a popular grade for many different applications such as:

• Spacecraft
• Turbine blades of jet engines
• Nuclear reactors

Huitong Group was established in 1978. After 38 years'development and innovation,by now,Huitong Group has set up multiple subsidiary companies.Among them,Zhengzhou Huitong Pipe Fitting Co.,Ltd.,with the indepent right of import and export, is mainly engaged in exporting steel pipe and pipe fittings for Huitong Group and assisting another subsidiary company of Huitong Group:Zhengzhou Huitong Machanical Equipment Co.,Ltd., in exporting machanical equipment.

Zhengzhou Huitong Pipeline Equipment Co.,Ltd.,with the strong support of Huitong Group,and years'development and innovation, are more and more professional in technical service and can manufacure products with all kinds of material,shape and size. Especially in elbows, tee, reducer, flange and pipe cap etc., we have gained more than 20 product patent, and hundreds of technology patent. Also,we have gradually taken an ireplacable role in High-pressure,high-temperature and anti-corrosion area. With the continuous construction of engery in China,such as petrol gas,electric power,etc.,our company has become the purchasing center of whole set fittings for such projects.In 2009,a foreign trade team established,is manily engaged in oil gas and electric power projects abroad.By now, our products have been exported to

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