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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.

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Seamless Steel Pipe

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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

Warehouse Storage

TIANYI Steel (Shandong) Co., Ltd. is located in the beautiful Shandong Province. With the continuous development of business, the company's business scope continues to expand. The company has a group of professional sales staff to provide customers with high-quality services. The company is committed to providing customers with high-quality, low-cost steel products. We have won the trust and praise of our customers with our commitment and quality-oriented service concept.

Packing and shipping

Our main products include: carbon steel plate, carbon steel pipe, color-coated sheet/coil, galvanized sheet/sheet tube/coil/corrugated sheet/plate steel (I-beam channel steel H-beam), long product, galvanized pipe, Welded pipe, gas pipe, spiral pipe, plate, thread, wire, automobile flat steel, etc. The stock of each specification is sufficient. And it is an excellent distributor of Chinese state-owned enterprises: Baosteel, Baotou Steel, Anshan Iron and Steel, Baotou Iron and Steel, and other national iron and steel enterprises.

Application field

Our advantage is to integrate market information, quickly find the products you need, provide high-quality price concessions, one-stop service, and provide you with products accurately and quickly. We always adhere to the tenet of "quality first, customer first, high-quality service, honesty and trustworthiness". With high-quality products, good reputation and high-quality service. We are committed to win-win cooperation with domestic and foreign merchants. We look forward to common development and create brilliance together. Feel free to contact our team to experience supreme service and quality products. Looking forward to working with us.

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FAQ

Q1:Can you send samples?

A:Of course, we can provide customers with free samples and express shipping service to all over of the world.

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.

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:What about product prices information?

A:Prices various according to periodic price changes of raw materials.

Q5:What ports of shipment are there?

A:Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can specify other ports according to your needs.

Q6:What is your terms of payment ?

A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment or based on BL copy or LC at sight.

Q7.Do you provide custom made Products service?

A: Yes,if you have your own design , we can produce according to your specification and drawing.

Q8:What are the certifications for your products?

A:We have ISO 9001, MTC, third parties’ inspections are all available such SGS, BV ect.

Q9:How long does your delivery time take?

A:In general, our delivery time is within 7-15 days, and may be longer if the quantity is extremely large or special circumstances occur.

Q10: How many countries you already exported to?

A:We have exported to America, Canada, Brazil, Chile, Colombia, Russia, Ukraine, Thailand, Myanmar, Vietnam, India, Kenya, Ghana,somalia and other African countries.Our export experience is rich, we familiar with different market demands, can help customers avoid a lot of trouble.

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