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ASTM A335 P91 Alloy Steel Pipe

Alloy Steel P91 Pipes are suitable for applications. Most commonly,
it is applicable in the power industry and petrochemical plants.

Classification :

Seamless Steel Pipe

Key Word :

+86-15315575332

phl@zgbaogangsteel.com

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Product introduction

Astm A335 standard specication for seamless ferritic alloy-steel pipe for high-temperature service

ASTM A335 standard is issued under the fixed designation A 335/A 335M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon ( ュ) indicates an editorial change since the last revision or reapproval.

Scope

1.1This specification covers nominal (average) wall seamless alloy-steel pipe intended for high-temperature service (Mote 1). Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics.

NOTE 1 Α Appendix X1 lists the sizes and wall thicknesses of pipe which may be obtained under current commercial practice.

1.2 Several grades of ferritic steels (Note 2) are covered.

Note 2

ΑFerritic steels in this specification are defined as low and intermediate-alloy steels containing up to and including 10％ chromium.
1.3 Supplementary requirements (S1 to S7) of an optional nature are provided. These supplementary requirements call for additional tests to be made, and when desired, shall be so stated in the order together with the number of such tests required.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with specification. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.

Note 3ΑThe dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as "nominal diameter," "size," and "nominal size."

Material & Manufacture

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

Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend TestMechanical Tests Specified

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:
P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].

Notes for Bend Test:
For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test.
Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser.
The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion.

Hydrostatic Test

The inside diameter of the bend shall be 1 inch [25 mm].
Each length of pipe shall be Hydro tested, at option of manufacture nondestructive electric testing can be used.

Technical data

Chemical Composition:

Grade	C	Mn	P	S	Si	Mo
P1	0.10-0.20	0.30-0.80	0.025	0.025	0.10-0.50	0.44-0.65
P2	0.10-0.20	0.30-0.61	0.025	0.025	0.10-0.30	0.44-0.65
P5	0.15max	0.30-0.60	0.025	0.025	0.50max	0.45-0.65
P5b	0.15max	0.30-0.60	0.025	0.025	1.00-2.00	0.45-0.65
P5c	0.12max	0.30-0.60	0.025	0.025	0.50max	0.45-0.65
P9	0.15max	0.30-0.60	0.025	0.025	0.25-1.00	0.90-1.10
P11	0.05-0.15	0.30-0.60	0.025	0.025	0.50-1.00	0.44-0.65
P12	0.05-0.15	0.30-0.61	0.025	0.025	0.50max	0.44-0.65
P15	0.05-0.15	0.30-0.60	0.025	0.025	1.15-1.65	0.44-0.65
P21	0.05-0.15	0.30-0.60	0.025	0.025	0.50max	0.80-1.06
P22	0.05-0.15	0.30-0.60	0.025	0.025	0.50max	0.87-1.13
P23	0.04-0.10	0.10-0.60	0.030max	0.010max	0.50max	0.05-1.30

Mechanical Properties

Mechanical properties	P1,P2	P12	P23	P91	P92,P11	P122
Tensile strength	380	415	510	585	620	620
Yield strength	205	220	400	415	440	400

Heat Treatment Requirements

Grade	Heat Treatment Type P5, P9, P11, and P22	Normalizing Temperature Range F [C]	Subcritical Annealing or Tempering Temperature Range F [C]
A335 P5 (b,c)	Full or Isothermal Anneal
	Normalize and Temper	*****	1250 [675]
	Subcritical Anneal (P5c only)	*****	1325 – 1375 [715 - 745]
A335 P9	Full or Isothermal Anneal
	Normalize and Temper	*****	1250 [675]
A335 P11	Full or Isothermal Anneal
	Normalize and Temper	*****	1200 [650]
A335 P22	Full or Isothermal Anneal
	Normalize and Temper	*****	1250 [675]
A335 P91	Normalize and Temper	1900-1975 [1040 - 1080]	1350-1470 [730 - 800]
	Quench and Temper	1900-1975 [1040 - 1080]	1350-1470 [730 - 800]

Heat Treatment

A / N+T

N+T / Q+T

N+T

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Factory appearance and appearance

With strong financial strength, we have set up large factories and warehouses in more than 10 cities across the country, with a stock of more than 100000 tons, saving customers procurement time, ensuring customers' production cycle and product quality, and being the quality partner of end customers.

Factory appearance and appearance

1. Samples may be provided by the seller and freight borne by the buyer.
2. We have full stock,and can deliver within short time. Many styles for your choices.
3. Good Quality + Factory Price + Quick Response + Reliable Service, is what we are trying best to offer you.
4. All of our products are produce by our professional workman and we have our high-work-effect foreign trade team, you can totally believe our service.
5. We have many years of experience in manufacturing and selling steel and we cherish every order from our honor.

Application field

The main supply fields are: aerospace, national defense equipment, military weapons, chemical industry, shipbuilding, nuclear energy, trains, containers, environmental protection, precision machining, auto parts, machinery, electronic products, molds, medical treatment Equipment, construction, decoration, etc.

Customer Visit Feedback

With 30 years of experience in R&D and production of high-quality steel, we have been selected as one of China's top 500 enterprises for 15 consecutive years. With strong financial strength, we have set up large factories and warehouses in more than 10 cities across the country, with a stock of more than 100000 tons

Honor

The company has adhered to the principle of quality first and service-oriented for many years, and has provided high-quality steel for key national projects such as steel structure engineering, highway and railway construction, hydropower stations, mines, and plant renovations.

COOPERATIVE PARTNER

FAQ

Q3 : It's my first time to import steel products, can you help me with it?

A : Sure,we have agent to arrange the shipment, we will do it together with you.

Q4:Do you have the products in stock?

A:We have the products in stock. Also, we can produce for your order.

Q5:Do you offer after-sales services?

A:Certainly. If you have any questions, please feel free to contact us. We shall certainly do it to your satisfaction.

Q6:What kind of work does your company do?

A:Our company is a professional manufacturer. We mainly produce stainless steel plate/coil/round rod, carbon steel plate/coil,galvanized plate/coil, PPGI coil, roofing sheet and so on.

Q1:Will you offer samples?

A:Yes. We will provide samples according to your needs and send them out within three days after receiving payment.

Q2 : What product information do I need to provide?

A : Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase.

Q7;What are the advantages of your company？

We have international advanced production equipment, large factory buildings, strong company strength, perfect products and reliable quality。

Q8： Are you a factory or trading company?

A;We are a factory specializing in the production of steel

Seamless Steel Pipe