ASTM A335 steel pipe

June 16, 2013 Alloy pipes No comments

ASTM A335 is a ASTM standard specifies Seamless Ferritic Alloy Steel Pipe for High-Temperature Service. ASTM A335 pipe ordered to this specification shall be suitable for bending and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics.

Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service.
Standards: ASTM A335/335M (ASME SA335/SA335M)

Size (mm):

Outer Dimensions: 19.05mm ~ 114.3mm
Wall Thickness:2.0mm ~ 14 mm
Length: max 16000mm

Application: Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service.

The main products of steel / steel grade: P11; P12; P22; P5;.

Packing: Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.

Inspection and Test: Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.

Surface treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.

Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

This specification covers seamless ferritic alloy-steel pipe for high-temperature service. The pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding. The steel material shall conform to chemical composition, tensile property, and hardness requirements. Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices. The range of pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practices. The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.

Mainly Grade of ASTM A335：

ASTM A335 P11, P22, P5, P9, P91, P92

Chemical Composition (%) for the main grade

Grade	C	Mn	P, S, max	Si	Cr	Mo
P11	0.05-0.15	0.30-0.60	0.025	0.50-1.00	1.00-1.50	0.44-0.65
P22	0.05-0.15	0.30-0.60	0.025	0.50 max	1.90-2.60	0.87-1.13
P5	0.15 max	0.30-0.60	0.025	0.50 max	4.00-6.00	0.45-0.65
P9	0.15 max	0.30-0.60	0.025	0.25-1.00	8.00-10.00	0.90-1.10
P91	0.08-0.12	0.30-0.60	0.020/0.010	0.20-0.50	8.00-9.50	0.85-1.05
	V 0.18-0.25	N 0.03-0.07	Ni 0.40 max	Al 0.02 max	Nb 0.06-0.10	Ti 0.01 max
P92	0.07-0.13	0.30-0.60	0.020/0.010	0.50 max	8.50-9.50	0.30-0.60
	V 0.15-0.25	N 0.03-0.07	Ni 0.40 max	Al 0.02 max	Nb 0.04-0.09	W 1.50-2.00
				B 0.001-0.006	Ti 0.01 max	Zr 0.01 max

Mechanical Properties

Data	Grade P11, P22, P5, P9	Grade P91	Grade P92
Tensile strength, min, (MPa)	415	585	620
Yield strength, min, (MPa)	205	415	440
Elongation, min, (%), L/T	30/20	20/…	20/…

Heat Treatment

A / N+T

N+T / Q+T

N+T

Material & Manufacture

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

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]
P5 (b,c)	Full or Isothermal Anneal
	Normalize and Temper	*****	1250 [675]
	Subcritical Anneal (P5c only)	*****	1325 – 1375 [715 - 745]
P9	Full or Isothermal Anneal
	Normalize and Temper	*****	1250 [675]
P11	Full or Isothermal Anneal
	Normalize and Temper	*****	1200 [650]
P22	Full or Isothermal Anneal
	Normalize and Temper	*****	1250 [675]
P91	Normalize and Temper	1900-1975 [1040 - 1080]	1350-1470 [730 - 800]
	Quench and Temper	1900-1975 [1040 - 1080]	1350-1470 [730 - 800]

Mechanical Tests Specified

Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test
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.

Ordering Information

Orders for material under this specification should include the following, as required, to describe the desired material adequately:

Quantity	Feet, meters, or number of lengths
Name of material	Seamless Alloy Steel Pipe
Grade	P5, P9, P11, P22, P91
Manufacture	Hot-finished or cold-drawn
Size using one of the following:
NPS and Schedule Number
Outside Diameter and Nominal Wall Thickness
Outside Diameter and Minimum Wall Thickness
Inside Diameter and Nominal Wall Thickness
Inside Diameter and Minimum Wall Thickness
Length	Specific or Random
End Finish

Referenced Documents

A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
E213 Practice for Ultrasonic Examination of Metal Pipe and Tubing
E309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation
E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
B36.10M Welded and Seamless Wrought Steel Pipe
SAE J 1086 Practice for Numbering Metals and Alloys (UNS)
SNT-TC-1A Recommended Practice for Nondestructive Personnel Qualification and Certification

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