ASTM A335 P12 Seamless Ferritic Alloy-Steel Pipe
 
Standard:ASTM A 335/A 335M
Standard Specification for
Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
 
 
ASTM A335 P12 Seamless Ferritic Alloy-Steel Pipes cover nominal (average) wall seamless alloy-steel pipe intended for high-temperature service.
Pipe ordered to ASTM A 335 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.
 
 
 
ASTM A335 P12 Seamless Ferritic Alloy-Steel Pipe Quick Details
Manufacture:Seamless process ,Hot-finished or Cold-finished
Wall thickness(WT): 2.1mm——20 mm.
Outer diameter (OD): 21 mm——509mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
 
Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T / T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden) or as required
 
 
 
Materials and Manufacture
Grade P12—The steel shall be made by coarsegrain melting practice.
Grade P12 Pipe may be either hot finished or cold drawn with the finishing treatment
 
 
Heat Treatment:
Grade P11 Seamless Ferritic Alloy-Steel Pipe are reheated and furnished in the full-annealed, isothermal annealed, or normal-ized and tempered condition. If furnished in the normalized and tempered condition,the minimum tempering temperature for Grades P11are 1200°F [650°C].
 
Pipe of Grades P12, either hot finished or cold drawn, may be given a final heat treatment at 1200°F [650°C] to 1300°F [705°C] .
 
 
Chemical Composition of ASTM A335 P12

Grade	Chemical Composition(%)
	C	Mn	P	S	Si	Cr	Mo
P12	≤0.015	0.30-0.60	≤0.025	≤0.025	≤0.50	0.80-1.25	0.45-0.65

 
 
 
 
Mechanical Properties of ASTM A335 P12

Grade	Mechanical property
	Tensile Strength(MPa)	Yield Strength(MPa)	Elongation(%)
P12	≥415	≥205	≥30

 
 
Outside diameter tolerances of ASTM A335 Seamless Ferritic Alloy-Steel Pipe
 

NPS Designator	Over		Under
	in.	mm	in.	mm
1⁄8 to 1 1⁄2 , incl.	1 ⁄ 64 (0.015)	0.40	1 ⁄ 64 (0.015)	0.40
Over 1 1⁄2 to 4, incl.	1 ⁄ 32 (0.031)	0.79	1 ⁄ 32 (0.031)	0.79
Over 4 to 8, incl.	1 ⁄ 16 (0.062)	1.59	1 ⁄ 32 (0.031)	0.79
Over 8 to 12, incl.	3 ⁄ 32 (0.093)	2.38	1 ⁄ 32 (0.031)	0.79
Over 12	± 1 %

 
 
Hydrostatic Test
Each length of pipe shall be subjected to the hydrostatic test or nondestructive examination.
 
 
 
Mechanical Tests Required
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 1 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.
 
 
 
Marking
In addition to the marking prescribed in Specification A 999/A 999M, the marking shall include the length, the ANSI schedule number and the heat number or manufacturer’s number by which the heat can be identified.
 
 
 
 
Ordering Information
Orders for material includes the following, as required, to describe the desired material adequately:
(1) Quantity (feet, centimetres, or number of lengths),
(2) Name of material (seamless alloy steel pipe),
(3) Grade (P12),
(4) Manufacture (hot-finished or cold-drawn),
(5) Size (NPS or outside diameter and schedule number or average wall thickness),
(6) Length (specific or random),
(7) End finish (Ends Section of Specification A 999/A 999M),
(8) Test report required (Certification Section of Specification AA 999/A 999M),
 
 
Photos of ASTM A335 P12 Seamless Ferritic Alloy-Steel Pipe
 

 
Note: Material furnished under ASTM A335 conform to the applicable requirements of the current edition of Specification A 999/A 999M