Especificação técnica do ASTM A335 P11 e P12

Especificação técnica do ASTM A335 P11 e P12

(Parte 1 de 4)

Designation: A 335/A 335M – 9 AnAmerican National Standard

Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service1

This 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 (e) indicates an editorial change since the last revision or reapproval.

This standard has been approved for use by agencies of the Department of Defense.

1. Scope

1.1 This specification2 covers nominal (average) wall seamless alloy-steel pipe intended for high-temperature service. 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. 1.2 Several grades of ferritic steels (Note 1) are covered. Their compositions are given in Table 1.

NOTE 1—Ferritic 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 the specification. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.

NOTE 2—The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”

2. Referenced Documents

2.1 ASTM Standards: A 450/A 450M Specification for General Requirements for

Carbon Ferritic Alloy, and Austenitic Alloy Steel Tube3

A 530/A 530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe3

E 213 Practice for Ultrasonic Examination of Metal Pipe and Tubing4

E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation4

E 381 Method of Macroetch Testing, Inspection, and Rating

Steel Products, Comprising Bars, Billets, Blooms, and Forgings5

E 527 Practice for Numbering Alloys and Metals (UNS)3 E 570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products4 2.2 Other Documents: SNT-TC-1A Recommended Practice for Nondestructive

Personnel Qualification and Certification6

SAE J 1086 Practice for Numbering Metals and Alloys (UNS)7

3. Ordering Information

3.1 Orders for material under this specification should include the following, as required, to describe the desired material adequately: 3.1.1 Quantity (feet, centimetres, or number of lengths), 3.1.2 Name of material (seamless alloy steel pipe), 3.1.3 Grade (Table 1), 3.1.4 Manufacture (hot-finished or cold-drawn), 3.1.5 Size (NPS or outside diameter and schedule number or average wall thickness), 3.1.6 Length (specific or random), 3.1.7 End finish (Ends Section of Specification A 530/ A 530M), 3.1.8 Optional requirements (Section 8, 1 and 12 of this specification. See the Sections on Hydrostatic Test Requirements and Permissible Variation in Weight for Seamless Pipe in Specification A 530/A 530M), 3.1.9 Test report required (Certification Section of Specification A 530/A 530M), 3.1.10 Specification designation, and

1 This specification is under the jurisdiction of ASTM Committee A-1 on Steel,

Stainless Steel, and Related Alloys, and is the direct responsibility of Subcommittee A01.10 on Tubing.

Current edition approved Mar. 10, 1999. Published May 1999. Originally published as A 335 – 51 T. Last previous edition A 335/A 335M – 98a. 2 For ASME Boiler and Pressure Vessel Code applications see related Specification SA-335 in Section I of that Code. 3 Annual Book of ASTM Standards, Vol 01.01.

4 Annual Book of ASTM Standards, Vol 03.03. 5 Annual Book of ASTM Standards, Vol 03.01. 6 Available from the American Society for Nondestructive Testing, 1711 Arlingate Plaza, PO Box 28518, Columbus, OH 43228-0518. 7 Available from Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15096.

AMERICAN SOCIETY FOR TESTING AND MATERIALS 100 Barr Harbor Dr., West Conshohocken, PA 19428 Reprinted from the Annual Book of ASTM Standards. Copyright ASTM

3.1.1 Special requirements or any supplementary requirements selected, or both.

4. General Requirements

4.1 Material furnished to this specification shall conform to the applicable requirements of the current edition of Specification A 530/A 530M, unless otherwise provided herein.

5. Materials and Manufacture

5.1 Pipe may be either hot finished or cold drawn with the finishing treatment as required in 5.3. 5.2 Grade P2 and P12—The steel shall be made by coarsegrain melting practice. Specific limits, if any, on grain size or deoxidation practice shall be a matter of agreement between the manufacturer and purchaser. 5.3 Heat Treatment: 5.3.1 All pipe of grades shown in Table 1 except P5c, P91,

P92, and P122 as provided in 5.3.2, shall be 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 P5, P5b, P9, P21, and P22 shall be 1250°F [675°C], the minimum tempering temperature for Grades P1, P2, P11, P12, and P 15 shall be 1200°F [650°C].

NOTE 3—It is recommended that the temperature for tempering should be at least 100°F [50°C] above the intended service temperature; consequently, the purchaser should advise the manufacturer if the service temperature is to be over 1100°F [600°C].

5.3.2 Pipe of Grades P1, P2, and P12, either hot finished or cold drawn, may be given a final heat treatment at 1200°F [650°C] to 1300°F [705°C] instead of heat treatments specified in 5.3.1.

5.3.3 All pipe of Grades P5c shall be given a final heat treatment in the range from 1325°F [715°C] to 1375°F [745°C].

NOTE 4—Certain of the ferritic steels covered by this specification will harden if cooled rapidly from above their critical temperature. Some will

TABLE 1 Chemical Requirements

Grade

DesignationA

Composition, %

Carbon Man-ganese Phosphorus,max

Sulfur,max

Silicon Chromium Molybdenum Others

P1 K11522 0.10–0.20 0.30–0.80 0.025 0.025 0.10–0.500.4–0.65 . . .
P2 K11547 0.10–0.20 0.30–0.61 0.025 0.025 0.10–0.30 0.50–0.81 0.4–0.65
P5 K41545 0.15 max 0.30–0.60 0.025 0.025 0.50 max 4.0–6.0 0.45–0.65
P5b K51545 0.15 max 0.30–0.60 0.025 0.025 1.0–2.0 4.0–6.0 0.45–0.65
P5c K41245 0.12 max 0.30–0.60 0.025 0.025 0.50 max 4.0–6.0 0.45–0.65
P9 S5040 0.15 max 0.30–0.60 0.025 0.025 0.25–1.0 8.0–10.0 0.90–1.10
P11 K11597 0.05–0.15 0.30–0.60 0.025 0.025 0.50–1.0 1.0–1.50 0.4–0.65
P12 K11562 0.05–0.15 0.30–0.61 0.025 0.025 0.50 max 0.80–1.25 0.4–0.65
P15 K11578 0.05–0.15 0.30–0.60 0.025 0.025 1.15–1.650.4–0.65 . . .
P21 K31545 0.05–0.15 0.30–0.60 0.025 0.025 0.50 max 2.65–3.35 0.80–1.06
P22 K21590 0.05–0.15 0.30–0.60 0.025 0.025 0.50 max 1.90–2.60 0.87–1.13

Cb 0.06–0.10

Cu 0.30–1.70

Al 0.040 max

ANew designation established in accordance with Practice E 527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS). BGrade P 5c shall have a titanium content of not less than 4 times the carbon content and not more than 0.70 %; or a columbium content of 8 to 10 times the carbon content.

A 335/A 335M air harden, that is, become hardened to an undesirable degree when cooled in air from high temperatures. Therefore, operations involving heating such steels above their critical temperatures, such as welding, flanging, and hot bending, should be followed by suitable heat treatment.

5.3.4 Grade T92 shall be normalized at 1900°F [1040°C] minimum and tempered at 1350°F [730°C] minimum as a final heat treatment. 5.3.5 Grade P122 shall be normalized at 1900°F [1040°C] minimum, and tempered at 1350°F [730°C] minimum as a final heat treatment. 5.4 Except when Supplementary Requirement S7 is specified by the purchaser, Grade P91 shall be normalized at 1900°F [1040°C] minimum, and tempered at 1350°F [730°C] minimum as a final heat treatment. Alternatively, liquid quenching and tempering is allowed for thicknesses above 3 in. when mutually agreed upon between the manufacturer and the purchaser. In this case the pipe shall be quenched from 1900°F [1040°C] minimum and tempered at 1350°F [730°C] minimum as final heat treatment.

(Parte 1 de 4)

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