Home
Products
About Us
Factory Tour
Quality Control
Contact Us
Request A Quote
News
SHANGHAI UNITE STEEL
Home ProductsAlloy Steel Tube

Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled

China SHANGHAI UNITE STEEL certification
China SHANGHAI UNITE STEEL certification
I'm Online Chat Now

Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled

Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled
Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled

Large Image :  Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled

Product Details:
Place of Origin: China
Brand Name: UST
Certification: ISO 9001
Model Number: OD: 32-1200mm; WT: 3.5-200mm
Payment & Shipping Terms:
Minimum Order Quantity: MOQ: 3 ton
Price: USD 800- 3000/ton
Packaging Details: Plastic plugs in both ends, Hexagonal bundles of max 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips.
Delivery Time: Within 15-35 days
Payment Terms: L/C, T/T, D/A, D/P
Supply Ability: 3000 ton/month
Detailed Product Description
ProductHydraulic Cylinder: Alloy Steel Tube P91 Technique: Hot Rolled
Quality Standard: ASTM A335; DIN 2391; JIS G3441; Etc. Surface: Black, Bright, Smooth,etc.
Delivery Conditions: BKS, NBK,BK ,BKW, GBK(+A), NBK(+N), BK(+C) Inspection: SGS, BV Etc.
End: Plain / Beveled / Vanished / Plastic Caps
High Light:

Steel Round Tube

,

Round Steel Tubing

,

Boiler Steel Tube

ASTM A335 GRADE P91 HOT ROLLED ALLOY STEEL SEAMLESS PIPES/TUBES

 

 

OVERVIEW

 

A335/SA335 P91 is a ferritic alloy steel that has very high strength properties, which do not deteriorate with time, and are creep resistant. It is also called 9 Cr 1 Mo steel, or chrome moly pipe, based on its composition.

Compared to its predecessors, the T22 or P22 grade, grade P91 exhibits high strength, enduring temperatures up to 600 °C. The oxidation temperature limits are also higher allowing elements to be engineered with less thickness. This contributes to an almost 10 times higher thermal fatigue life and allows engineers to increase the operating temperature to a higher level, increasing efficiency.

P91 typically allows a wall thickness reduction by at least a 2-to-1 ratio. A wall that is thinner creates lighter hanger loads, less welding time and uses less filler metal.

These advantages are enabled by this steel’s high amount of chromium. Grade 91 contains 9% chromium and 1% molybdenum compared to 2.5% chromium in the next best P22 grade.

 

 

APPLICATIONS

 

A335/SA335 P91 is suitable for bending, flanging (vanstoning), and similar forming operations and for fusion welding. P91 is most commonly used in the power industry and petrochemical plants where fluids and gases are transported at extremely high temperatures and pressures.

P91’s strength and high temperature endurance makes it ideally suitable for plants that operate on a cyclic basis - like combined cycle plants. Also, the reduction in thickness suits HRSG designers, in an HRSG the temperature head is limited and locating the coils in the heat transfer path is very critical.

P91 is the correct grade for:

  • Power generation
  • Petrochemicals
  • Gas processing
  • Petrochemical Plants
  • Heaters
  • Oilfield services

 

STANDARD SPECIFICATIONS

 

Process Seamless Pipes
Shape Round
Technique Hot Rolled
Size Range

32-1200mm OD

Thickness 3.5-200mm WT
Pipe End Plain / Beveled / Vanished / Plastic Caps
Coating Black / Galvanised / 3LPE / Turned / Peeled / Grinded / Polished / Anti – Corrosion Oil
Length 15 Mtr max Cut to Length available
Heat Treatment Spheroidizing / Full Annealing / Process Annealing / Isothermal Annealing / Normalizing / Quenching / Martempering (Marquenching) / Quench And Tempering / Austempering
Application Oil & Gas / Hydro Carbon Process / Automotive / Boiler, Heat Exchanger / Plumbing, HVAC & Firefighting / Structural / General Engineering / Railways / Sewage & Waterwell
Quality Inspection Third Party inspection is acceptable (SGS, BV etc.)

Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 0

TOLERANCE FOR SEAMLESS TUBING

 

I.D tolerance (mm) O.D tolerance (mm) Straightness (mm)
H9-H12 -/+0.5% 0.20-0.80

 

 

Relevant Standard & Grades Equivalency

 

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

-EN 10297-1 Seamless Circular Steel Tubes for Mechanical and General Engineering Purpose

-DIN2391 Seamless Precision Steel Tubes

-JIS G3441 Alloy Steel Tubes for Machine Purposes

 

Chemical Requirements, Composition, %

 

Standard Grade C Si Mn P S Cr Mo
ASTM A335 P91 0.08-0.12 0.20-0.50 0.30-0.60 0.020 max 0.010 max 8.00-9.50 0.85-1.05

 

Chromium, or chrome, improves high-temperature strength and increases oxidation resistance. It is virtually irreplaceable in resisting oxidation at elevated temperatures. Chrome also 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.

Also present are smaller quantities of nickel and manganese which increase the hardenability of the steel.

The addition of Vanadium (V) and Columbium/Niobium (Cb/Nb) as well as the control of Nitrogen (N) greatly Improves Creep Strength.

More important than the alloying elements is the formation of this alloy steel. The steel is formed by normalizing at 1050 °C, then air cooling down to 200 °C. It is then tempered by heating to 760 °C. The temperatures and cooling rates produce the microstructure that results in the high creep strength properties.

 

 

Mechanical properties

 

Standard Steel Grade Yield strength MPa (>=) Tensile strength MPa (>=)

Elongation %

(>=)

ASTM A335 P91 415 585

34

 

 

PROCESSING

 

Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.

 

Heat Treatment of ASTM A335 P91 alloy steel pipe

  • A / N+T
  • N+T / Q+T
  • N+T

Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 1

 

 

Our Services

 

What we can offer?

 

-We offer a wide range of steel products in a wide variety of dimensions and executions, according to the common international specifications or customize.

-Machining and heat treatment are available.

-Also, we advise you in choosing the right materials.

 

 

Quality Assurance

 

Below inspection will be done in the production.
(1) ray detection---RT;
(2) ultrasonic testing---UT;
(3) Magnetic Particle Testing-MT;
(4) penetration testing-PT;
(5) eddy current flaw detection-ET

 

Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 2

 

Package

 

In standard export packing and seaworthy material with hexagon shape bundle, covered with tarpaulin, in containers or in bulk, or upon request

Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 3

 

Payment & Delivery

 

1. Both T/T and L/C will be acceptable

2. Trade Terms: FOB, CIF, CFR

3. The delivery will be in 10-15 days if have stock; For customized items, the delivery will be negotiated by both parties

4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples

 

Company Information

 

Shanghai Unite Steel Trading Co., Ltd

 

We are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

 

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china.

 

What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!

 

Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 4Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 5Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 6Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 7Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 8Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 9Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 10Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 11Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 12Astm A335 Seamless Alloy Ste El Tubep91 High Pressure Boiler Pipes Hot Rolled 13

 
FAQ

 

Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price. 
 
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.
 
Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material doesn't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.
 
Q: What is the payment term?
A: T/T or L/C.
 
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come. 

 

Contact Details
SHANGHAI UNITE STEEL

Contact Person: Eric

Tel: 13661534998

Send your inquiry directly to us (0 / 3000)