Designation: A 520 – 97
An American National Standard AMERICAN SOCIETY FOR TESTING AND MATERIALS 100 Barr Harbor Dr., West Conshohocken, PA 19428 Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Supplementary Requirements for Seamless and ElectricResistance-Welded Carbon Steel Tubular Products for HighTemperature Service Conforming to ISO Recommendations for Boiler Construction1 This standard is issued under the fixed designation A 520; 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 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 Scope
allowa allowable ble stress stresses es which which have have been been used used in the creep creep and stress-rupture ranges for material to these specifications under ASME Boiler Code rules. These stresses were developed by applyi applying ng to the basic basic creep creep and stress stress-ru -ruptu pture re data, data, design design crit criter eria ia at leas leastt as cons conser erva vati tive ve as thos thosee in the the ISO ISO Recommendations.
1.1 This specificatio specification n provides provides the requirem requirements ents which are to supple suppleme ment nt and supers supersede ede the requir requireme ements nts of ASTM ASTM specifica specificatio tions ns for seamle seamless ss and electri electric-r c-resis esistan tance-w ce-weld elded ed carbon carbon steel tubular products products suitable suitable for high-temp high-temperat erature ure serv servic ice, e, when when thes thesee tubu tubula larr prod produc ucts ts are are to be used used in applications conforming to ISO Rules. 1.2 The tubula tubularr specifi specificat cation ionss 2 whic which h may may invo invoke ke this this specification are:
4. Number of Tests Tests Required at Room Temperature Temperature 4.1 For lots lots of 400 tubes tubes or under under,, one tube for each 50 tubes or 2 % of the total number of tubes, at the option of the manufacturer, shall be submitted to a tensile test, a flattening test, and a flaring or flanging test. For lots of more than 400 tubes, one additional tube out of each 100 tubes or part thereof shall be tested. 4.2 The flaring flaring and flanging flanging tests tests apply only for tubes tubes of outside diameter not greater than 6 in. (152.4 mm) and a wall thickness not greater than 0.350 in. (8.89 mm). 4.3 A lot is defined defined as a group of tubes of the same diamet diameter er and wall thickness from metal of the same specification and of the same manufacturer.
Seamless Seamless Carbon Carbon Steel Pipe for High-T High-Temperature emperature Service Service A 106 106 Electr Electricic-Res Resist istanc ance-W e-Weld elded ed Carbon Carbon Steel Steel Boiler Boiler Tubes Tubes A 178/A 178/A 178M 178M Seamless Carbon Steel Boiler Tubes for High-Pressure ServiceA 192/A 192M Seamless Medium-Carbon Steel Boiler and Superheater Tubes A 210/A 210M Electric-Resistance-Welded Carbon Steel Boiler and Supe Superh rhea eate terr Tubes ubes for for High High-P -Pre ress ssur ure e Serv Servic ice e A 226 226
1.3 The values stated in inch-pound inch-pound units are to to be regarded as the standard. 2. Manufactur Manufacturee 2.1 If rimmed rimmed steel or other than killed killed steel is used in the manufa manufactu cture re of electr electricic-res resist istanc ance-w e-weld elded ed tubes tubes to the requirements of Specification A 178/A 178M, the strip shall be rolled in single width and shall not be slit longitudinally except to trim the edges.
5. Hydrostatic Test Test and Nondestructive Electric Test Test 5.1 Each Each tube tube shall shall be subjec subjected ted to a hydros hydrostat tatic ic or NDE test. 5.2 In case of a hydrostatic hydrostatic test, the test pressure pressure shall be 1.5 times the design pressure (at least 1000 psi) (6.89 mPa), but the pressure shall not be greater than that calculated in accordance with Eq 1:
3. Mechanical Property Property Requirements 3.1 The yield yield streng strength th values values at the indica indicated ted elevat elevated ed temperatures shall not be less than those given in Table 1. The yield strength corresponding to a permanent offset of 0.2 % of the gage length of the specimen or to a total extension of 0.5 % of the gage length under load shall be determined. 3.2 For information information purposes, purposes, Table 2 lists lists the maximum
P 5 2S 3 t/D
(1)
where: P 5 test pressure, D 5 specified outside diameter, t 5 specified nominal wall thickness, and S 5 stress 5 40 % of minimum specified tensile strength at room temperature as specified in the order. 5.3 The nondestructi nondestructive ve electric electric test shall shall be as allowed and in accordance accordance with the applicabl applicablee standard standard (Specifica (Specifications tions A 106, A 178, A 192, A 210, or A 226).
1 This specification is under the jurisdiction of ASTM Committee A-1 on Steel, Stainless Stainless Steel, and Related Alloys and is the direct responsibility responsibility of Subcommittee Subcommittee A01.09 on Carbon Steel Tubular Products. Current Current edition approved approved Sept. 10, 1997. 1997. Published Published Sept. 1998. 1998. Originally Originally published as A 520 – 64. Last previous edition A 520–90 (1995) {1. 2 Annual Book of ASTM Standards Standards,, Vol 01.01.
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A 520 TABLE 1 Minimum Yield Strength Values at Specified Elevated Temperatures Specification NumberA
Specified Properties at Room Temperature Tensile Strength
Yield StrengthB
Min
Min
Strength at Designated Temperature
480°F (250°C)
525°F (275°C)
570°F (300°C)
615°F (325°C)
660°F (350°C)
700°F (370°C)
750° (400°C)
800°F (425°C)
16 20 23 16 20 16 20 23 16
15 19 23 15 19 15 19 23 15
15 19 22 15 19 15 19 22 15
14 18 21 14 18 14 18 21 14
14 18 21 14 18 14 18 21 14
Inch-pound Units, psi A 106-A A 106-B A 106-C A 178-AC A 178-C A 192C A 210 A-1 A 210-C A 226C
48 60 70 48 60 48 60 70 48
000 000 000 000 000 000 000 000 000
30 35 40 30 37 30 37 40 30
000 000 000 000 000 000 000 000 000
19 24 28 19 24 19 24 28 19
200 000 000 200 000 200 000 000 200
18 22 26 18 22 18 22 26 18
250 800 600 250 800 250 800 000 250
17 21 25 17 21 17 21 25 17
300 600 200 300 600 300 600 200 300
300 400 800 300 400 300 400 800 300
850 800 100 850 800 850 800 100 850
350 200 400 350 200 350 200 400 350
900 600 700 900 600 900 600 700 900
400 000 000 400 000 400 000 000 400
SI Units, MPa A 106-A A 106-B A 106-C A 178-AC A 178-C A 192C A 210 A-1 A 210-C A 226C
331 414 483 331 414 331 414 483 331
207 241 276 207 255 207 255 276 207
132 165 193 132 165 132 165 193 132
126 157 183 126 157 126 157 183 126
119 149 174 119 149 119 149 174 119
112 141 164 112 141 112 141 164 112
109 136 159 109 136 109 136 159 109
106 132 154 106 132 106 132 154 106
103 128 150 103 128 103 128 150 103
99 124 145 99 124 99 124 145 99
A
Thespecifications listedin this table cover material forwhichextensive background of successful experience is available. Theminimumyieldstrengthvalues at elevated temperatures have been established from yield per tensile ratios in Table M3-1 of the ISO Recommendations and may be accepted without further verification. B The actual value of the yield strength at room temperature must be reported to the purchaser for his information. C These specifications do not contain tensile requirements. However, for this specification, the indicated minimum tensile strength and yield strength values are a requirement.
TABLE 2 Maximum Allowable Stress Values at Specified Elevated Temperatures Specification Number
Maximum Allowable Stress 600°F (315°C)
650°F (345°C)
700°F (370°C)
750°F (400°C)
800°F (425°C)
850°F (455°C)
900°F (480°C)
950°F (510°C)
1000°F (540°C)
7 100 7 800 ... 6 050 6 650 7 100 7 800 7 800 6 050
5 000 5 000 ... 4 250 4 250 5 000 5 000 4 250
3 000 3 000 ... 2 550 2 550 3 000 3 000 3 000 2 550
1 500 1 500 ... 1 300 1 300 1 500 1 500 1 500 1 300
45.2 53.8 ... 41.7 45.8 45.2 53.8 53.8 41.7
34.5 34.5 ... 29.3 29.3 34.5 34.5 34.5 29.3
20.7 20.7 ... 17.6 17.6 20.7 20.7 20.7 17.6
10.3 10.3 ... 9.0 9.0 10.3 10.3 10.3 9.0
Inch-Pound Units, psi A
A 106-A A 106-BA A 106-C A 178-AA B C A 178-CA B C A 192A A 210 A-1A A 210-CA A 226A C ,
,
,
,
,
12 15 17 11 15 11 15 17 11
000 000 500 750 000 750 000 500 750
12 15 17 11 15 11 15 17 11
000 000 500 750 000 750 000 500 750
11 14 16 11 14 11 14 16 11
650 350 600 500 350 500 350 600 500
10 12 14 9 11 10 12 14 9
700 950 750 100 000 700 950 750 100
9 10 12 7 9 9 10 12 7
000 800 000 650 200 000 800 000 650
SI Units, MPA A 106-AA A 106-BA A 106-C A 178-AA B C A 178-CA B C A 192A A 210 A-1A A 210-CA A 226A C ,
,
,
,
,
82.7 103.4 120.7 81.0 103.4 81.0 103.4 120.7 81.0
82.7 103.4 120.7 81.0 103.4 81.0 103.4 120.7 81.0
80.3 98.9 114.5 79.3 98.9 79.3 98.9 114.5 79.3
73.8 89.3 101.7 62.7 75.8 73.8 89.3 101.7 62.7
A
62.0 74.5 82.7 52.7 63.4 62.0 74.5 82.7 52.8
Upon prolonged exposure to t emperatures above 800°F (425°C), the carbide phase of carbon steel may be converted to graphite. Only killed steel shall be used above 850°F (450°C). C Above 700°F (370°C), these stresses include a joint efficiency factor of 0.85. When material to this specification is used for pipe, multiply the stress values up to and including 700°F by a factor of 0.85. When material to this specification is used for boilers, water wall, superheater and economizer tubes that are enclosed within a setting, the stress values above 700 up to and including 850°F (455°C) may be divided by a f actor of 0.85. B
6. Keywords 6.1 boiler tubes; resistance welded steel tube; seamless steel tube; steel tube; carbon; temperature service applications; high; welded steel tube 2
A 520 The American Society for Testing and Materials 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 five 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 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, 100 Barr Harbor Drive, West Conshohocken, PA 19428.
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