ASTM A269 Seamless Welded Austenitic Stainless Steel Tubing
ASTM A269/A269M − 15a
Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
1. Scope*
1.1 This specification covers grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and low- or high-temperature service, as designated in Table 1.
1.2 The tubing sizes and thicknesses usually furnished to this specification are 1 ⁄ 4 in. [6.4 mm] in inside diameter and larger and 0.020 in. [0.51 mm] in nominal wall-thickness and heavier.
1.3 Mechanical property requirements do not apply to tubing smaller than 1 ⁄ 8 in. [3.2 mm] in inside diameter or 0.015 in. [0.38 mm] in thickness.
NOTE 1—Additional testing requirements may apply for use in ASME B31.3 applications.
1.4 Optional supplementary requirements are provided and,when one or more of these are desired, each shall be so stated in the order.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
2. Referenced Documents
2.1 ASTM Standards:
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet, and Strip
A632 Specification for Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service
A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
2.2 ASME Piping Code:
ASME B31.3 Process Piping
2.3 Other Standard:
SAE J1086 Practice for Numbering Metals and Alloys (UNS)
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, metres, or number of lengths),
3.1.2 Name of material (seamless or welded tubes),
3.1.3 Grade (Table 1),
3.1.4 Size (outside diameter and nominal wall thickness),
3.1.5 Length (specific or random),
3.1.6 Optional requirements (heat treatment, see Section 6;hydrostatic or nondestructive electric test, see Section 10),
3.1.7 Test report required (see Section on Inspection of Specification A1016/A1016M),
3.1.8 Specification designation, and
3.1.9 Special requirements and any supplementary requirements selected.
4. General Requirements
4.1 Material furnished under this specification shall conform to the applicable requirements of the current edition of Specification A1016/A1016M, unless otherwise provided herein.
5. Manufacture
5.1 The tubes shall be made by the seamless or welded process.
5.2 At the manufacturer’s option, tubing may be furnished either hot finished or cold finished.
6. Heat Treatment
6.1 All material shall be furnished in the solution heattreated condition. Except as provided in 6.2, the heat-treatment procedure shall consist of heating the material to a minimum temperature or temperature range as specified for the grade in Table 2, followed by quenching in water or rapidly cooling by other means. Alternatively, for seamless tubes, immediately following hot forming while the temperature of the tubes is not less than the specified minimum solution treatment temperature, tubes may be individually quenched in water or rapidly cooled by other means.
6.2 Controlled structural or special service characteristics shall be specified as a guide for the most suitable heat treatment. If the final heat treatment is at a temperature under 1900 °F [1040 °C] and is so specified on the order, each tube shall be stenciled with the final heat treatment temperature in degrees Fahrenheit [degrees Celsius] after the suffix “HT”.
6.3 A solution annealing temperature above 1950 °F [1065°C] may impair the resistance to intergranular corrosion after subsequent exposure to sensitizing conditions in TP321,TP347, and TP348. When specified by the purchaser, a lower temperature stabilization or re-solution anneal shall be used subsequent to the initial high temperature solution anneal (see Supplementary Requirement S3).
7. Chemical Composition
7.1 The steel shall conform to the requirements as to chemical composition as prescribed in Table 1.
8. Product Analysis
8.1 An analysis of either one billet or one length of flat-rolled stock or one tube shall be made from each heat. The chemical composition thus determined shall conform to the requirements specified.
8.2 A product analysis tolerance of Table number A1.1 in Specification A480/A480M shall apply. The product analysis tolerance is not applicable to the carbon content for material with a specified maximum carbon of 0.04 % or less.
8.3 If the original test for product analysis fails, retests of two additional billets, lengths of flat-rolled stock, or tubes shall be made. Both retests for the elements in question shall meet the requirements of the specification; otherwise all remaining material in the heat or lot shall be rejected or, at the option of the producer, each billet, length of flat-rolled stock, or tube may be individually tested for acceptance. Billets, lengths of flat-rolled stock, or tubes which do not meet the requirements of the specification shall be rejected.
9. Mechanical Tests Required
9.1 Flaring Test (Seamless Tubes)—One test shall be made on specimens from one end of one tube from each lot of finished tubes.
9.2 Flange Test (Welded Tubes)—One test shall be made on specimens from one end of one tube from each lot of finished tubes.
9.3 For both the flaring test and the flange test, the term lot applies to all tubes prior to cutting to length of the same nominal size and wall thickness that are produced from the same heat of steel. When final heat treatment is in a batch-type furnace, a heat-treatment lot shall include only those tubes of the same size and from the same heat that are heat treated in the same furnace charge. When the final heat treatment is in a continuous furnace or when the heat-treated condition is obtained directly by quenching after hot forming, the number of tubes of the same size and from the same heat in a heat-treatment lot shall be determined from the size of the tubes as prescribed in Table 3.
9.4 Hardness Test—Brinell or Rockwell hardness determination shall be made on specimens from two tubes from each lot. The term lot applies to all tubes prior to cutting, of the same nominal diameter and wall thickness that are produced from the same heat of steel. When final heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same size and the same heat which are heat treated in the same furnace charge. When the final heat treatment is in a continuous furnace or when the heat-treated condition is obtained directly by quenching after hot forming, a lot shall include all tubes of the same size and heat, heat treated in the same furnace at the same temperature, time at heat, and furnace speed, or all tubes of the same size and heat, hot formed and quenched in the same production run.
9.5 When more than one heat is involved, the flaring,flanging, and hardness test requirements shall apply to each heat.
9.6 Reverse Flattening Test—For welded tubes, one reverse flattening test shall be made on a specimen from each 1500 ft[460 m] of finished tubing. Coiled tubing greater than 1500 ft[450 m] in length shall be sampled at both ends.Acoil must be continuous without any circumferential butt welds.
10. Hydrostatic or Nondestructive Electric Test
10.1 Each tube shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall be at the option of the manufacturer, unless otherwise specified in the purchase order.
11. Hardness Requirements
11.1 Tubes shall have a hardness number not exceeding the values shown for the grade in Table 2.
11.2 For tubing less than 0.065 in. [1.65 mm] in wall thickness, it is permissible to use the Rockwell superficial hardness test or the Vickers hardness test. When the Vickers test is used, the values of Table 2 will apply. The superficial hardness number for Grade TPXM-29 and S20153 tubes shall not exceed 80 on the 30 T scale or 92 on the 15 T scale. The hardness number for Grades TPXM-10, TPXM-11, and TPXM-19 tubes shall not exceed 46 on the 30 N scale or 73 on the 15 N scale. The hardness number for S20100 and S31254 shall not exceed 79 on the 30 T scale or 91 on the 15 T scale.Tubes made from all other grades shall not exceed 74 on the 30 T scale or 88 on the 15 T scale. The hardness for S31655 shall not exceed 81 on the 30 T scale or 92 on the 15 T scale.Tubes made from all other grades shall not exceed 74 on the 30 T scale or 88 on the 15 T scale.
11.3 The hardness test shall not be required on tubes smaller than 1 ⁄ 4 in. [6.4 mm] in inside diameter or tubes having a wall thickness thinner than 0.020 in. [0.51 mm]. Smaller or thinner tubes should be tension tested only, in accordance with Specification A632.
12. Permissible Variations in Dimensions
12.1 Variations in outside diameter, wall thickness, and length, from those specified, shall not exceed the amounts prescribed in Table 4.
A When tubes as ordered require wall thicknesses 3 ⁄ 4 in. [19.0 mm] or over, or an inside diameter 60 % or less of the outside diameter, a wider variation in wall thickness is required. On such sizes a variation in wall thickness of 12.5 % over or under will be permitted.For tubes less than 1 ⁄ 2 in. [12.7 mm] in inside diameter which cannot be successfully drawn over a mandrel, the wall thickness may vary ±15% from that specified.
B These tolerances apply to cut lengths up to and including 24 ft [7.3m]. For lengths greater than 24 ft [7.3 m], the above over tolerances shall be increased by 1 ⁄ 8 in. [3mm] for each 10 ft [3 m] or fraction thereof over 24 ft [7.3 m], or 1 ⁄ 2 in. [13 mm], whichever is lesser.
C Ovality provisions of 12.2 apply.
12.2 The permissible variations in outside diameter given in Table 4 are not sufficient to provide for ovality in thin-walled tubes, as defined in the Table. In such tubes, the maximum and minimum diameters at any cross section shall deviate from the nominal diameter by no more than twice the permissible variation in outside diameter given in Table 4; however, the mean diameter at that cross section must still be within the given permissible variation.
13. Surface Condition
13.1 The tubes shall be pickled free of scale. When bright annealing is used, pickling is not necessary.
14. Product Marking
14.1 In addition to the marking prescribed in Specification A1016/A1016M, the marking shall include whether the tubing is seamless or welded and the final heat-treatment temperature in degrees Fahrenheit [degrees Celsius] after the suffix “HT” if the final heat treatment temperature is under 1900°F [1040°C].
14.2 When the Nondestructive Electric Test is performed,each length of tubing shall be marked with the letters “NDE,”and the certification, when required, shall also indicate this test.
15. Keywords
15.1 austenitic stainless steel; seamless steel tube; stainless steel tube; steel tube; welded steel tube
Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
1. Scope*
1.1 This specification covers grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and low- or high-temperature service, as designated in Table 1.
1.2 The tubing sizes and thicknesses usually furnished to this specification are 1 ⁄ 4 in. [6.4 mm] in inside diameter and larger and 0.020 in. [0.51 mm] in nominal wall-thickness and heavier.
1.3 Mechanical property requirements do not apply to tubing smaller than 1 ⁄ 8 in. [3.2 mm] in inside diameter or 0.015 in. [0.38 mm] in thickness.
NOTE 1—Additional testing requirements may apply for use in ASME B31.3 applications.
1.4 Optional supplementary requirements are provided and,when one or more of these are desired, each shall be so stated in the order.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
2. Referenced Documents
2.1 ASTM Standards:
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet, and Strip
A632 Specification for Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service
A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
2.2 ASME Piping Code:
ASME B31.3 Process Piping
2.3 Other Standard:
SAE J1086 Practice for Numbering Metals and Alloys (UNS)
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, metres, or number of lengths),
3.1.2 Name of material (seamless or welded tubes),
3.1.3 Grade (Table 1),
3.1.4 Size (outside diameter and nominal wall thickness),
3.1.5 Length (specific or random),
3.1.6 Optional requirements (heat treatment, see Section 6;hydrostatic or nondestructive electric test, see Section 10),
3.1.7 Test report required (see Section on Inspection of Specification A1016/A1016M),
3.1.8 Specification designation, and
3.1.9 Special requirements and any supplementary requirements selected.
4. General Requirements
4.1 Material furnished under this specification shall conform to the applicable requirements of the current edition of Specification A1016/A1016M, unless otherwise provided herein.
5. Manufacture
5.1 The tubes shall be made by the seamless or welded process.
5.2 At the manufacturer’s option, tubing may be furnished either hot finished or cold finished.
6. Heat Treatment
6.1 All material shall be furnished in the solution heattreated condition. Except as provided in 6.2, the heat-treatment procedure shall consist of heating the material to a minimum temperature or temperature range as specified for the grade in Table 2, followed by quenching in water or rapidly cooling by other means. Alternatively, for seamless tubes, immediately following hot forming while the temperature of the tubes is not less than the specified minimum solution treatment temperature, tubes may be individually quenched in water or rapidly cooled by other means.
6.2 Controlled structural or special service characteristics shall be specified as a guide for the most suitable heat treatment. If the final heat treatment is at a temperature under 1900 °F [1040 °C] and is so specified on the order, each tube shall be stenciled with the final heat treatment temperature in degrees Fahrenheit [degrees Celsius] after the suffix “HT”.
6.3 A solution annealing temperature above 1950 °F [1065°C] may impair the resistance to intergranular corrosion after subsequent exposure to sensitizing conditions in TP321,TP347, and TP348. When specified by the purchaser, a lower temperature stabilization or re-solution anneal shall be used subsequent to the initial high temperature solution anneal (see Supplementary Requirement S3).
7. Chemical Composition
7.1 The steel shall conform to the requirements as to chemical composition as prescribed in Table 1.
8. Product Analysis
8.1 An analysis of either one billet or one length of flat-rolled stock or one tube shall be made from each heat. The chemical composition thus determined shall conform to the requirements specified.
8.2 A product analysis tolerance of Table number A1.1 in Specification A480/A480M shall apply. The product analysis tolerance is not applicable to the carbon content for material with a specified maximum carbon of 0.04 % or less.
8.3 If the original test for product analysis fails, retests of two additional billets, lengths of flat-rolled stock, or tubes shall be made. Both retests for the elements in question shall meet the requirements of the specification; otherwise all remaining material in the heat or lot shall be rejected or, at the option of the producer, each billet, length of flat-rolled stock, or tube may be individually tested for acceptance. Billets, lengths of flat-rolled stock, or tubes which do not meet the requirements of the specification shall be rejected.
9. Mechanical Tests Required
9.1 Flaring Test (Seamless Tubes)—One test shall be made on specimens from one end of one tube from each lot of finished tubes.
9.2 Flange Test (Welded Tubes)—One test shall be made on specimens from one end of one tube from each lot of finished tubes.
9.3 For both the flaring test and the flange test, the term lot applies to all tubes prior to cutting to length of the same nominal size and wall thickness that are produced from the same heat of steel. When final heat treatment is in a batch-type furnace, a heat-treatment lot shall include only those tubes of the same size and from the same heat that are heat treated in the same furnace charge. When the final heat treatment is in a continuous furnace or when the heat-treated condition is obtained directly by quenching after hot forming, the number of tubes of the same size and from the same heat in a heat-treatment lot shall be determined from the size of the tubes as prescribed in Table 3.
TABLE 3 Number of Tubes in a Lot Heat Treated by the Continuous Process or by Direct Quench After Hot Forming
| Size of Tube | Size of Lot |
|
2 in. [50 mm] and over in outside diameter and 0.200 in.[5.08 mm] and over in wall thickness |
not more than 50 tubes |
|
Less than 2 in. [50 mm] but over 1 in. [25 mm] in outside diameter or over 1 in. [25 mm] in outside diameter and under 0.200 in. [5.08 mm] in wall thickness |
not more than 75 tubes |
| 1 in. [25 mm] or less in outside diameter | not more than 125 tubes |
9.4 Hardness Test—Brinell or Rockwell hardness determination shall be made on specimens from two tubes from each lot. The term lot applies to all tubes prior to cutting, of the same nominal diameter and wall thickness that are produced from the same heat of steel. When final heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same size and the same heat which are heat treated in the same furnace charge. When the final heat treatment is in a continuous furnace or when the heat-treated condition is obtained directly by quenching after hot forming, a lot shall include all tubes of the same size and heat, heat treated in the same furnace at the same temperature, time at heat, and furnace speed, or all tubes of the same size and heat, hot formed and quenched in the same production run.
9.5 When more than one heat is involved, the flaring,flanging, and hardness test requirements shall apply to each heat.
9.6 Reverse Flattening Test—For welded tubes, one reverse flattening test shall be made on a specimen from each 1500 ft[460 m] of finished tubing. Coiled tubing greater than 1500 ft[450 m] in length shall be sampled at both ends.Acoil must be continuous without any circumferential butt welds.
10. Hydrostatic or Nondestructive Electric Test
10.1 Each tube shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall be at the option of the manufacturer, unless otherwise specified in the purchase order.
11. Hardness Requirements
11.1 Tubes shall have a hardness number not exceeding the values shown for the grade in Table 2.
TABLE 2 Heat Treatment and Hardness Requirements
11.2 For tubing less than 0.065 in. [1.65 mm] in wall thickness, it is permissible to use the Rockwell superficial hardness test or the Vickers hardness test. When the Vickers test is used, the values of Table 2 will apply. The superficial hardness number for Grade TPXM-29 and S20153 tubes shall not exceed 80 on the 30 T scale or 92 on the 15 T scale. The hardness number for Grades TPXM-10, TPXM-11, and TPXM-19 tubes shall not exceed 46 on the 30 N scale or 73 on the 15 N scale. The hardness number for S20100 and S31254 shall not exceed 79 on the 30 T scale or 91 on the 15 T scale.Tubes made from all other grades shall not exceed 74 on the 30 T scale or 88 on the 15 T scale. The hardness for S31655 shall not exceed 81 on the 30 T scale or 92 on the 15 T scale.Tubes made from all other grades shall not exceed 74 on the 30 T scale or 88 on the 15 T scale.
11.3 The hardness test shall not be required on tubes smaller than 1 ⁄ 4 in. [6.4 mm] in inside diameter or tubes having a wall thickness thinner than 0.020 in. [0.51 mm]. Smaller or thinner tubes should be tension tested only, in accordance with Specification A632.
12. Permissible Variations in Dimensions
12.1 Variations in outside diameter, wall thickness, and length, from those specified, shall not exceed the amounts prescribed in Table 4.
TABLE 4 Permissible Variations in Dimensions
|
Group |
Size, Outside Diameter, in. [mm] |
Permissible Variations in Outside Diameter, in. (mm) |
Permissible Variations in Wall Thickness, A % |
Permissible Variations in Cut Length,in. [mm] B |
Thin Walled Tubes C | |
| Over | Under | |||||
| 1 |
Up to 1 ⁄ 2 [13] |
±0.005 [0.13] | ±15 | 1 ⁄ 8 [3.2] | 0 | |
| 2 |
1 ⁄ 2 to 1 1 ⁄ 2 [13 to 38], excl |
±0.005 [0.13] | ±10 | 1 ⁄ 8 [3.2] | 0 | less than 0.065 in. [1.65 mm] nominal |
| 3 |
1 1 ⁄ 2 to 3 1 ⁄2 [38 to 89], excl |
±0.010 [0.25] | ±10 | 3 ⁄ 16 [4.8] | 0 | less than 0.095 in. [2.41 mm] nominal |
| 4 |
3 1 ⁄ 2 to 5 1 ⁄2 [89 to 140], excl |
±0.015 [0.38] | ±10 | 3 ⁄ 16 [4.8] | 0 | less than 0.150 in. [3.81 mm] nominal |
| 5 |
5 1 ⁄ 2 to 8 [140 to 203], excl |
±0.030 [0.76] | ±10 | 3 ⁄ 16 [4.8] | 0 | less than 0.150 in. [3.81 mm] nominal |
| 6 |
8 to 12 [203 to 305], excl |
±0.040 [1.01] | ±10 | 3 ⁄ 16 [4.8] | 0 | less than 0.200 in. [5.08 mm] nominal |
| 7 |
12 to 14 [305 to 356], excl |
±0.050 [1.26] | ±10 | 3 ⁄ 16 [4.8] | 0 | less than 0.220 in. [5.59 mm] nominal |
A When tubes as ordered require wall thicknesses 3 ⁄ 4 in. [19.0 mm] or over, or an inside diameter 60 % or less of the outside diameter, a wider variation in wall thickness is required. On such sizes a variation in wall thickness of 12.5 % over or under will be permitted.For tubes less than 1 ⁄ 2 in. [12.7 mm] in inside diameter which cannot be successfully drawn over a mandrel, the wall thickness may vary ±15% from that specified.
B These tolerances apply to cut lengths up to and including 24 ft [7.3m]. For lengths greater than 24 ft [7.3 m], the above over tolerances shall be increased by 1 ⁄ 8 in. [3mm] for each 10 ft [3 m] or fraction thereof over 24 ft [7.3 m], or 1 ⁄ 2 in. [13 mm], whichever is lesser.
C Ovality provisions of 12.2 apply.
12.2 The permissible variations in outside diameter given in Table 4 are not sufficient to provide for ovality in thin-walled tubes, as defined in the Table. In such tubes, the maximum and minimum diameters at any cross section shall deviate from the nominal diameter by no more than twice the permissible variation in outside diameter given in Table 4; however, the mean diameter at that cross section must still be within the given permissible variation.
13. Surface Condition
13.1 The tubes shall be pickled free of scale. When bright annealing is used, pickling is not necessary.
14. Product Marking
14.1 In addition to the marking prescribed in Specification A1016/A1016M, the marking shall include whether the tubing is seamless or welded and the final heat-treatment temperature in degrees Fahrenheit [degrees Celsius] after the suffix “HT” if the final heat treatment temperature is under 1900°F [1040°C].
14.2 When the Nondestructive Electric Test is performed,each length of tubing shall be marked with the letters “NDE,”and the certification, when required, shall also indicate this test.
15. Keywords
15.1 austenitic stainless steel; seamless steel tube; stainless steel tube; steel tube; welded steel tube