当前位置:首页 >> 机械/仪表 >>

ASTM A268&A268M-2004 通用无缝和焊接铁素体与马氏体不锈钢管的标准规范


Designation: A 268/A 268M – 04

Standard Specication for

Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service1
This standard is is

sued under the xed designation A 268/A 268M; 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 specication2 covers a number of grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and high-temperature service. Most of these grades are commonly known as the “straight-chromium” types and are characterized by being ferromagnetic. Two of these grades, TP410 and UNS S 41500 (Table 1), are amenable to hardening by heat treatment, and the high-chromium, ferritic alloys are sensitive to notch-brittleness on slow cooling to ordinary temperatures. These features should be recognized in the use of these materials. Grade TP439 is used primarily for hot-water tank service and does not require post-weld heat treatment to prevent attack of the heat affected zone.
NOTE 1—TP329 (S32900) formerly in this specication, has been transferred to Specications A 789/A 789M and A 790/A 790M.

1.2 An optional supplementary requirement is provided, and when desired, shall be so stated in the order.
NOTE 2—For tubing smaller than 12 in. [12.7 mm] in outside diameter, the elongation values given for strip specimens in Table 2 shall apply. Mechanical property requirements do not apply to tubing smaller than 18 in. [3.2 mm] in outside diameter or with walls thinner than 0.015 in. [0.4 mm].

2. Referenced Documents 2.1 ASTM Standards: 3 A 480/A 480M Specication for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip A 763 Practices for Detecting Susceptibility to Intergranular Attack in Ferritic Stainless Steels A 789/A 789M Specication for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service A 790/A 790M Specication for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe A 941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys A 1016/A 1016M Specication for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes E 213 Practice for Ultrasonic Examination of Metal Pipe and Tubing E 273 Practice for Ultrasonic Examination of the Weld Zone of Welded Pipe and Tubing 3. Terminology 3.1 For denitions of terms used in this specication, refer to Terminology A 941. 4. Ordering Information 4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this specication. Such requirements may include, but are not limited to, the following: 4.1.1 Quantity (feet, metres, or number of lengths), 4.1.2 Name of material (seamless or welded tubes), 4.1.3 Grade (Table 1),
3 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website.

1.3 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 specication. The inch-pound units shall apply unless the “M” designation of this specication is specied in the order.

1 This specication is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee A01.10 on Stainless and Alloy Steel Tubular Products. Current edition approved May 1, 2004. Published June 2004. Originally approved in 1944. Last previous edition approved in 2003 as A 268/A 268M – 03. 2 For ASME Boiler and Pressure Vessel Code applications see related Specication SA-268 in Section II of that Code.

*A Summary of Changes section appears at the end of this standard.
Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.

1

TABLE 1 Chemical Requirements

NOTE 1— TP329 (S32900), formerly part of this specication, has been transferred to A 789/A 789M and A 790/A 790M.
Grade UNS DesignationB Element C, max Mn, max P, max S, max Si, max Ni Cr Mo Al Cu N Ti 0.08 1.00 0.040 0.030 1.00 0.50 max 11.5–14.5 ... 0.10–0.30 ... ... ... 0.15 1.00 0.040 0.030 1.00 ... 11.5–13.5 ... ... ... ... ... TP XM-27 0.12 1.00 0.040 0.030 1.00 ... 14.0–16.0 ... ... ... ... ... TP XM-33A 0.12 1.00 0.040 0.030 1.00 ... 16.0–18.0 ... ... ... ... ... TP405 S40500 TP410 S41000 TP429 S42900 TP430 S43000 TP443 S44300 Composition, % 0.20 1.00 0.040 0.030 1.00 0.75 max 18.0–23.0 ... ... 0.90–1.25 ... ... 0.20 1.50 0.040 0.030 1.00 0.75 max 23.0–27.0 ... ... ... 0.25 ... 0.12 1.50 0.040 0.030 1.00 0.50 max 23.0–27.0 ... ... ... 0.25 ... 0.08 1.00 0.045 0.045 1.00 0.80 max 11.5–13.0 ... ... ... ... 12 3 C min; 1.10 max ... ... ... 0.08 1.00 0.045 0.030 1.00 0.50 max 10.5–11.7 ... ... ... ... 6 3 C min; 0.75 max TP468 TP446–1 S44600 TP446–2A S44600 ... S40800 TP409 S40900

Grade UNS Designation Element C, max Mn, max P, max S, max Si, max Ni Cr Mo Al, max Cu, max N, max Ti

TP439

...

TP430 Ti

18Cr-2Mo

29-4

29-4-2

26-3-3

25-4-4

...B

...

A 268/A 268M – 04

S43035

S41500C

S43036

S44627

S44626

S44400

S44700

S44800

S44660

S44635

S44735

S32803

S40977

S43940

S42035

S46800

Composition, % 0.06 0.07 0.05 0.10 0.01A 1.00 0.5–1.0 1.00 0.40 0.75 0.040 0.03 0.040 0.02 0.040 0.030 0.03 0.030 0.02 0.020 1.00 0.60 1.00 0.40 0.75 0.50 max 3.5–5.5 0.75 max 0.5E max 0.50 max 17.00– 11.5–14.0 16.00– 25.0–27.5 25.0–27.0 19.00 19.50 ... 0.5–1.0 ... 0.75–1.50 0.75–1.50 0.15 ... ... ... ... ... ... ... 0.2 0.20 0.04 ... ... 0.015 0.040 0.20 + 4 (C ... 5 3 C min; ... 7 3 (C + N) + N) min; 0.75 max but no less 1.10 max than 0.20 min; 1.00 max ... ... ... 0.05–0.20 ... 0.025 1.00 0.040 0.030 1.00 1.00 max 17.5–19.5 1.75–2.50 ... ... 0.035 (Ti + Cb) 0.20 + 4 (C + N) min; 0.80 max ... 0.010 0.30 0.025 0.020 0.20 0.15 max 28.0–30.0 3.5–4.2 ... 0.15 0.020F ... 0.010 0.30 0.025 0.020 0.20 2.0–2.5 28.0–30.0 3.5–4.2 ... 0.15 0.020F ... 0.030 0.015D 0.03 0.03 0.08 0.030 1.00 0.5 1.50 1.00 1.00 1.00 0.040 0.020 0.040 0.040 0.045 0.040 0.030 0.005 0.015 0.015 0.030 0.030 1.00 0.50 1.00 1.00 1.00 1.00 1.00 max 3.0–4.0 0.30–1.00 ... 1.0–2.5 0.50 28.00– 28.0–29.0 10.50–12.5017.50–18.50 13.5–15.5 18.00–20.00 30.00 3.0–4.0 3.5–4.5 3.60–4.20 1.8–2.5 ... ... 0.2–1.2 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0.040 0.035 0.045 0.020 0.030 ... ... 0.030 (Ti + Cb) = (Ti + Cb) = (Ti + Cb) = ... ... 0.10–0.60 0.30–0.50 0.07–0.30 0.20–1.00 0.20 + 4 0.20–1.00 and 6 3 (C + N) and 6 3 C + N) min to (C+ N) min 0.80 max min 0.030 1.00 0.040 0.030 1.00 1.0–3.50 25.0–28.0 0.025 1.00 0.040 0.030 0.75 3.5–4.5 24.5–26.0 ... ... ... 0.15–0.50G ... (3 3 %C + 0.30) min ... 0.10–0.60 (Ti + Cb) = 0.20 +4(C+N) min;0.80 max

2

Cb

...

...

A For small diameter or thin walls, or both, tubing, where many drawing passes are required, a carbon maximum of 0.015 % is necessary. Small outside diameter tubes are dened as those less than 0.500 in. [12.7 mm] in outside diameter and light wall tubes as those less than 0.049 in. [1.2 mm] in average wall thickness (0.040 in. [1 mm] in minimum wall thickness). B When intergranular corrosion testing is specied, the test will be Practices A 763, using samples prepared as agreed upon between the seller and the purchaser. C Plate version of CA6NM. D Carbon plus nitrogen = 0.30 max. E Nickel plus copper. F Carbon plus nitrogen = 0.025 % max. G Cb/(C + N) = 12 min.

A 268/A 268M – 04
TABLE 2 Number of Tubes in a Lot Heat Treated by the Continuous Process
Size of Tube 2 in. [50.8 mm] and over in outside diameter and 0.200 in. [5.1 mm] and over in wall thickness Less than 2 in. [50.8 mm] but over 1 in. [25.4 mm] in outside diameter or over 1 in. [25.4 mm] in outside diameter and under 0.200 in. [5.1 mm] in wall thickness 1 in. [25.4 mm] or less in outside diameter Size of Lot not more than 50 tubes not more than 75 tubes

tested for acceptance. Billets, lengths of at-rolled stock or tubes which do not meet the requirements of the specication shall be rejected.
NOTE 3—For ange and aring requirements, the term lot applies to all tubes prior to cutting of the same nominal size and wall thickness which are produced from the same heat of steel. When nal heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same size and from the same heat which are heat treated in the same furnace charge. When the nal heat treatment is in a continuous furnace, the number of tubes of the same size and from the same heat in a lot shall be determined from the size of the tubes as prescribed in Table 2. NOTE 4—For tensile and hardness test requirements, 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 nal 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 nal heat treatment is in a continuous furnace, 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.

not more than 125 tubes

4.1.4 Size (outside diameter and nominal wall thickness), 4.1.5 Length (specic or random), 4.1.6 Optional requirements (hydrostatic or nondestructive electric test, Section 15), 4.1.7 Test report required (Certication Section of Specication A 1016/A 1016M), 4.1.8 Specication designation, and 4.1.9 Special requirements. 5. General Requirements 5.1 Material furnished under this specication shall conform to the applicable requirements of Specication A 1016/ A 1016M unless otherwise provided herein. 6. Manufacture 6.1 The tubes shall be made by the seamless or welded process with no ller metal added. 7. Heat Treatment 7.1 As a nal heat treatment, tubes shall be reheated to a temperature of 1200°F [650°C] or higher and cooled (as appropriate for the grade) to meet the requirements of this specication. 7.2 The martensitic grade UNS S 41500 shall be reheated to a temperature of 950°F [510°C] or higher and cooled as appropriate to meet the requirements of this specication. 8. Chemical Composition 8.1 The steel shall conform to the chemical requirements prescribed in Table 1. 9. Product Analysis 9.1 An analysis of either one billet or one length of atrolled stock or one tube shall be made from each heat. The chemical composition thus determined shall conform to the requirements specied. 9.2 The product analysis tolerance of the Chemical Requirements Table of A 480 /A 480M shall apply. The product analysis tolerance is not applicable to the carbon content for material with a specied maximum carbon of 0.04 % or less. 9.3 If the original test for product analysis fails, retests of two additional billets, lengths of at-rolled stock or tubes shall be made. Both retests for the elements in question shall meet the requirements of the specication; otherwise all remaining material in the heat or lot (Note 3) shall be rejected or, at the option of the producer, each billet or tube may be individually
3

10. Tensile Requirements 10.1 The material shall conform to the tensile properties prescribed in Tables 3 and 4. 11. Hardness Requirements 11.1 The tubes shall have a hardness number not to exceed those prescribed in Table 5. 12. Permissible Variations in Dimensions 12.1 Variations in outside diameter, wall thickness, and length from those specied shall not exceed the amounts prescribed in Table 6. 12.2 The permissible variations in outside diameter given in Table 6 are not sufficient to provide for ovality in thin-walled tubes, as dened 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 6; however, the mean diameter at that cross section must still be within the given permissible variation. 12.3 When the specied wall is 2 % or less of the specied outside diameter, the method of measurement is in accordance with the agreement between the purchaser and the manufacturer (see Note 5).
NOTE 5—Very thin wall tubing may not be stiff enough for the outside diameter to be accurately measured with a point contact test method, such as with the use of a micrometer or caliper. When very thin walls are specied, “go”–“no go” ring gages are commonly used to measure diameters of 112 in. [38.1 mm] or less. A0.002-in. [0.05-mm] additional tolerance is usually added on the “go” ring gage to allow clearance for sliding. On larger diameters, measurement is commonly performed with a pi tape. Other test methods such as optical test methods may also be considered.

13. Surface Condition 13.1 All tubes shall be free of excessive mill scale, suitable for inspection. A slight amount of oxidation will not be considered as scale. Any special nish requirements shall be subject to agreement between the manufacturer and the purchaser.

A 268/A 268M – 04
TABLE 3 Tensile Requirements TABLE 4 Minimum Elongation Values
ElongationA in 2 in. or 50 mm, min, % TP446–1 and S 44735 18 17 16 15 14 13 13 12 11 10 10 10 All Other Grades 20 19 18 17 16 15 14 13 12 12 11 11

NOTE 1—TP329 (S32900), formerly part of this specication, has been transferred to /A 789M and A 790/A 790M.
Tensile strength, min, ksi [MPa] 60 [415] 55 [380] 60 [415] 60 [415] 70 [485] 70 [485] 65 [450] 55 [380] 60 [415] 115 [795] 65 [450] 68 [470] 60 [415] 80 [550] 85 [585] 90 [620] 75 [515] Yield strength, min, ksi [MPa] 30 [205] 30 [205] 30 [205] 35 [240] 40 [275] 40 [275] 40 [275] 25 [170] 30 [205] 90 [620] 40 [275] 45 [310] 40 [275] 60 [415] 65 [450] 75 [515] 60 [415] ElongationA in 2 in. or 50 mm, min, % 20 20 20 20 20 18 20 20 20 15 20 20 20 20 20 20 18

Wall Thickness

in. [0.312] [0.281] 14 [0.250] 732 [0.219] 316 [0.188] 532 [0.156] 18 [0.125] 332 [0.094] 116 [0.062] 0.062–0.035, excl 0.035–0.022, excl 0.022–0.015, incl
5 16 9 32

mm 8 7.2 6.4 5.6 4.8 4 3.2 2.4 1.6 1.6–0.9 0.9–0.6 0.6–0.4

S41500 15 14 14 13 12 11 11 10 9 8 8 8

Grade and UNS Designation TP405 S40500 ... S40800 TP410 S41000 TP429, TP430, and TP430 Ti S429000, S 43000, and S 43036 TP443 S44300 TP446-1 S44600 TP446-2 S44600 TP409 S40900 TP439 S43035 ... S41500 TPXM-27 S44627 TPXM-33 S44626 18Cr-2Mo S44400 29-4 and 29-4-2 S44700 and S 44800 26-3-3 0S44660 25-4-4 S44635 ... S44735 28-2-3.5 S32803 S40977 S43940 S42035 TP468 S46800

A Calculated elongation requirements shall be rounded to the nearest whole number.

Note—The above table gives the computed minimum values for each 132 in. [0.8 mm] decrease in wall thickness. Where the wall thickness lies between two values shown above, the minimum elongation value shall be determined by the following equation: Grade TP446–1 and S 44735 S41500 All other grades where: E = elongation in 2 in. or 50 mm, %. t = actual thickness of specimen, in. [mm]. Equation E = 28.8t + 9.00 [E = 1.13t + 9.00] E = 24t + 7.5 E = 32t + 10.00 [E = 1.25t + 10.00]

TABLE 5 Hardness Requirements.

NOTE 1— TP329 (S32900), formerly part of this specication, has been transferred to A 790/A 790M and A 789/A 789M.
Brinell Hardness, max 207 207 207 190 207 207 207 190 295B 241 217 207 265 270 ... 240 180 180 180 Rockwell Hardness, B Scale, max 95 95 95 90 95 95 95 90 32 100 95 100 25B 27B 100 100 88 88 88

87 [600] 65 [450] 62 [430] 80 [550] 60 [415]

72 41 36 55 30

[500] [280] [250] [380] [205]

16 18 18 16 22

Grade TP405 ... TP410 TP429, TP430, and TP430 TI TP443 TP446-1 and TP446-2 TP409 TP439 ... TPXM-33 and TPXM-27 18CR-2Mo 29-4 and 29-4-2 26-3-3 25-4-4 ... 28-2-3.5 ... ... ...
A B

UNS Designation S40500 S40800 S41000 S42900, S 43000, and S 43036 S44300 S44600 S40900 S43035A S41500 S44626 and S44627 S44400 S44700 and S44800 S44660 S44635 S44735 S32803 S40977 S43940 S42035

A For longitudinal strip tests a deduction of 0.90 % for TP446–1 and S 44735 and 1.00 % for all other grades shall be made from the basic minimum elongation for each 132 in. [0.8 mm] decrease in wall thickness below 516 in. [8 mm]. The following table gives the computed minimum values:

14. Mechanical Tests Required 14.1 Tension Tests—One tension test shall be made on a specimen for lots of not more than 50 tubes. Tension tests shall be made on specimens from two tubes for lots of more than 50 tubes (Note 4). 14.2 Flaring Test (for Seamless Tubes)— One test shall be made on specimens from one end of one tube from each lot (Note 3) of nished tubes. The minimum expansion of the inside diameter shall be 10 %. For tubes over 8 in. [203.2 mm] in outside diameter, or tubes with wall thickness 38 in. [9.52 mm] and over, the attening test may be performed instead of the aring test unless the aring test is specied in the purchase order. 14.3 Flange Test (for Welded Tubes)— One test shall be made on specimens from one end of one tube from each lot
4

Editorially corrected October 2000. Rockwell hardness, C scale.

(Note 3) of nished tubes. For tubes over 8 in. [203.2 mm] in outside diameter, or tubes with wall thickness 38 in. [9.52 mm]

A 268/A 268M – 04
TABLE 6 Permissible Variations in Dimensions
Permissible Variations in Outside Diameter, in. [mm] 60.005 [0.13] 60.005 [0.13] 60.010 [0.25] Permissible Variations in Cut Length, in.B [mm] Over
18 18

Group 1 2 3
12

Size, Outside Diameter, in. [mm] Up to [12.7], excl to 112 [12.7 to 38.1], excl
12

Permissible Variations in Wall Thickness,A % 615 610 610

Under 0 0 0

Thin-Walled TubesC ... less than 0.065 in. [1.6 mm] nominal less than 0.095 in. [2.4 mm] nominal less than 0.150 in. [3.8 mm] nominal less than 0.150 in. [3.8 mm] nominal

[3] [3] [5]

112 to 312 [38.1 to 88.9], excl 312 to 512 [88.9 to 139.7], excl 512 to 8 [139.7 to 203.2], incl
A

3 16

4

60.015 [0.38]

610

3 16



[5]

0

5

60.030 [0.76]

610

3 16



[5]

0

When tubes as ordered require wall thicknesses 34 in. [19 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 12 in. [12.7 mm] in inside diameter which cannot be successfully drawn over a mandrel, the wall thickness may vary 615 % from that specied. B These tolerances apply to cut lengths up to and including 24 ft [7.3 m]. For lengths greater than 24 ft [7.3 m], the above over tolerances shall be increased by 18 in. [3 mm] for each 10 ft [3 m] or fraction thereof over 24 ft, or 12 in. [13 mm], whichever is lesser. C Ovality provisions of 12.2 apply.

and over, the attening test may be performed instead of the ange test unless the ange test is specied in the purchase order. 14.4 Hardness Test—Brinell or Rockwell hardness tests shall be made on specimens from two tubes from each lot (Note 4). 14.5 When more than one heat is involved, the tension, aring, anging, and hardness test requirements shall apply to each heat. 14.6 Reverse Flattening Test—For welded tubes, one reverse attening test shall be made on a specimen from each 1500 ft [450 m] of nished tubing. 15. Hydrostatic or Nondestructive Electric Test 15.1 Each tube, seamless or welded, 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 specied in the purchase order. 16. Product Marking 16.1 In addition to the marking described in Specication A 1016/A 1016M, the marking shall indicate whether the tubing is seamless or welded. 17. Keywords 17.1 ferritic stainless steel; seamless steel tube; stainless steel tube; steel tube; welded steel tube

SUPPLEMENTARY REQUIREMENTS The following supplementary requirements shall apply only when specied by the purchaser in the inquiry, contract, or order. S1. Air-Underwater Pressure Test S1.1 When specied, the tubing shall be examined by the air underwater pressure test. S1.2 The tube shall be well-lighted, preferably by underwater illumination. S1.3 Any evidence of air leakage of the pneumatic couplings shall be corrected prior to testing. S1.4 After holding the pressure for not less than 5 s after the surface of the water has become calm, an inspection shall be made of the entire external surface of the tube. S1.5 If any tube leaks during the air-underwater test, it shall be rejected. Any leaking areas may be cut out and the tube retested as above. S2. Additional Testing of Welded Tubing per ASME Request S2.1 Each tube shall be subjected to an ultrasonic inspection employing Practices E 273 or E 213 with the rejection criteria referenced in Specication A 1016/A 1016M. S2.2 If Practice E 273 is employed, a 100 % volumetric inspection of the entire length of each tube shall also be performed using one of the non-destructive electric tests permitted by Specication A 1016/A 1016M. S2.3 The test methods described in the supplement may not be capable of inspecting the end portions of tubes. This condition is referred to as end effect. This portion, as determined by the manufacturer, shall be removed and discarded.

5

A 268/A 268M – 04
S2.4 In addition to the marking prescribed in Specication A 1016/A 1016M,“ S2” shall be added after the grade designation.

SUMMARY OF CHANGES Committee A01 has identied the location of selected changes to this specication since the last issue, A 268/A 268M – 03, which may impact the use of this specication (Approved May 1, 2004). (1) Revised grades TP 409 and TP 410 in Table 3.

Committee A01 has identied the location of selected changes to this specication since the last issue, A 268/A 268M – 01, which may impact the use of this specication (Approved September 10, 2003). (1) Replaced Specication A 450/A 450M with Specication A 1016/A 1016M throughout. (2) Claried ordering requirements to include purchaser’s responsibility in Section 4.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (www.astm.org).

6


相关文章:
美国钢管ASTM标准技术标准大全
美国钢管 ASTM 标准技术标准大全序号 品种 标准号 标题 1 ASTM ASTM A 268/A268M-2003 通用无缝和焊接铁素体与马氏体不锈钢管标推规范 2 ASTM ASTM A 269a...
ASTM 标准
氏体不锈钢管配件的标准规范 ASTM A450/A450M-2004 碳素钢管、铁素体合金钢管及奥氏体合金钢管一般要求的标准规范 ASTM A500-2003a 圆形与异型冷成型焊接与无缝...
ASTM钢管标准
ASTM 钢管标准 A1000-99 弹簧专用碳钢和合金钢钢丝规范 A1001-99 大型材高强度...A268/A268M-01 一般设备用无缝和焊接铁素体与马氏体不锈钢管 A269-01 一般...
A268 A268M-05 中文
A268 A268M-05 中文_机械/仪表_工程科技_专业资料。A268 A268M-05 中文一般用途铁素体和马氏体不锈钢无缝和焊接钢管 1.范围 1.1 本标准适用于许多牌号的耐...
astm钢管标准
astm 钢管标准更多钢管知识:www.029wfg.com A34/A34M-96 磁性材料的抽样和...A268/A268M-01 一般设备用无缝和焊接铁素体与马氏体不锈钢管 A269-01 一般...
热轧标准对应
ASTM A1009-05 材料标准规范 ASTM A1010/A1010M-01e1 更高强度马氏体不锈钢...ASTM A268/A268M-05A 通用无缝焊接铁素体和马氏体不锈钢管规格 ASTM A269-...
ASTM 美国材料试验协会标准目录
ASTM A268/A268M-2005a 通用无缝焊接铁素体和马氏体不锈钢管规格 7 页 ASTM A269-2007 通用无缝奥氏体不锈钢管和焊接氏体不锈钢管的规格 6 页 ASTM A27...
ASTM API钢管标准
ASTM 钢管标准 A1000-99 弹簧专用碳钢和合金钢钢丝规范 A1001-99 大型材高强度...A268/A268M-01 一般设备用无缝和焊接铁素体与马氏体不锈钢管 A269-01 一般...
ASTM-实用对照标准
ASTM 钢管标准 1 A1000-99 弹簧专用碳钢和合金钢钢丝规范 A1001-99 大型材高...A268/A268M-01 一般设备用无缝和焊接铁素体与马氏体不锈钢管 A269-01 一般...
美标标准
M-04b ASTM A268-96 ASTM A269-04a ASTM A270-03 ASTM A271-96 ASTM ...通用的无缝和焊接铁素体和马氏体不锈钢管 通用的无缝和焊接奥氏体不锈钢管件 ...
更多相关标签:
astm a268 | 奥氏体 马氏体 铁素体 | 铁素体和马氏体 | 铁素体 马氏体 | 马氏体和铁素体的区别 | 铁素体马氏体钢 | 板条马氏体 铁素体 | 铁素体马氏体双相钢 |