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1、UDC 669.14-1 34669.15-I 94-134:622.642-98-974 JAPANESE INDUSTRIAL STANDARD. Carbon and Alloy Steel Forgings for Pressure Vessels for Low-Temperature Service JIS G 3 2 0 5 - 1 9 8 8 Translated and Published Japanese Standards Association Printed in Japan 5 s J I S G*3205 i 3 8 4733608 0047bL 4 I In t
2、he event of any doubt arising, the original Standard in Japanese is to be final authority. 1 J I S G*3205 88 I 4933608 0047b92 b I UDC 669.14-134:669.15-194-134 :621.642-98-974 Further, the traditional units accompanied by numerical values in this Standard shall be converted to the SI units and nume
3、rical values on Jan. 1, 1991. JAPANESE INDUSTRIAL STANDARD J I S Carbon and Alloy Steel Forgings for Pressure Vessels for Low-Temperature Service G 3205-1988 1. Scope . This Japanese Industrial Standard specifies the carbon and alloy steel forgings imparted a high weldability , hereinafter referred
4、to as the llforgingsll to be used for the manufacture of pressure vessels and their components for low temperature service. Remark: The units and numerical values given in 1 in this Standard are based on the International System of Units (SI) and are appended for informative reference. -1 i 2. Class
5、 Symbols The class symbols of the forgings shall be as shown in Table 1. Table 1. Class Symbols .Class Symbol SFL 1 SFL 2 SFL 3 ! Ir . p 3. Chemical Composition chemical composition shall be as specified below: The forgings shall be tested in accordance with 9.3 and the resulting (1) The chemical co
6、mposition of the forgings shall be determined by ladle analysis, and the values obtained shall conform to Table 2. In the case where product analysis is performed on the forgings at the request of the purchaser, the permissible variance shall be as specified in Table 1, Table 2 or Table 3. (2) Appli
7、cable Standards: 8ee page 6. -. 2 G 3205-1988 Yield point or proof stress N/mm2 J I S G*3205 A8 E 4933608 0047b93 8 151 Charpy absorbed energy J Tensile Elongation Reduction Test strength of aruld the duration shall be 30 min or over per 25 mm with respect to the largest thickness (mm). When the pur
8、chaser designates the heat treatment of the test piece for stress relieving, etc., the manufacturer shall cut out test piece from test specimen in accordance with 9.3, and further perform the heat treatment in compliance with the purchasers indication. In this case, the purchaser shall specify the d
9、etails of heat treat- ment conditions such as heat treating temperature, duration, cooling rate, and the number of times of heat treatment. (3) 8.3 Repairs by Welding Repairs by welding of defects detected in in- spection shall be carried out in accordance with 3.4 of JIS G 0306. J I S G*3205 88 493
10、3bO8 0047675 L 4 G 3205-1988 9. Tests 9.1 Test Site The test site shall, as a rule, be the place of manufacture concerne d. At the request of the purchaser, the manufacturer shall have the presence of the purchaser at the tests. 9.2 C hemcial Analysis 9.2.1 General for Chemical Analysis The general
11、matters of chemical analysis shall be as specified in 4.1 of JIS G 0306. 9.2.2 Analysis Method one of the following Standards. The analysis method shall be in accordance with JIS G 1211 JIS G 1212 JIS G 1213 JI G 1214 JIS G 1215 JIS G 1216 JIS G 1253 JIS G 1256 JIS G 1257 9.3 Mechanical Test 9.3.1 M
12、ethod of Sampling Test Specimens The method of sampling the test specimens shall be as specified in 4.2.2 (1.1) of JIS G 0306. 9.3.2 Method of Sampling Test Pieces The method of sampling the test pieces shall be as specified in 4.2.2 (1.2) of JIS G 0306. 9.3.3 Number of Specimens and Test Pieces The
13、 number of test specimens and test pieces shall be as specified in 4.2.2 (1.3) of JIS G 0306. 9.3.4 Mechanical Test Method Mechanical test methods shall be as given in the following: (1) The tensile test method shall be as specified in 4.2.2 (1.4) of JIS G 0306. The impact test method shall be as sp
14、ecified in 4.2.2 (1.5) of JIS G 0306. (2) 9.4 Shapes and Dimensions The shapes and measurement of dimensions of the forgings shall be as specified in 4.5 of JIS G 0306. 9.5 Appearance Test The test of the external appearance of the forgings shall be as specified in 4.3 of JIS G 0306. 9.6 Ultrasonic
15、Examination The purchaser may specify the ultrasonic examination. The test method shall be in accordance with JIS G 0587, as appropriate. 10. Retest 10.1 Mechancial Test A retest for a mechanical test shall be as specified in 5.1 of JIS G 0306. I ! + - - 4 J I S G*3205 8B E 4733608 0047bb 3 5 G 3205
16、-1988 10.2 Test after Repairs by Welding Where a defect is repaired by welding in accordance with 8.3, the test for it shall be as specified in 5.2 of JIS . G 0306. 11. Inspection 11.1 The inspection of the forgings shall be as follows: (1) General matters of inspection shall be as specified in 6. o
17、f JIS G- 0306. Chemical composition shall conform to the requirements of 3. Mechanical properties shall conform to the requirements of 4. Shapes and dimensions shall conform to the requirements of 5 . Appearance shall conform to the requirements of B. (2) (3) (4) (5) (6) Soundness shall conform to t
18、he requirements of 7. 11.2 The purchaser may specify any of the items listed below, in addition to the items specified in 11.1. method, test method, and acceptance criteria shall be previously agreed upon by the purchaser and the manufacturer. In this case, the inspection items, sampling Hardness te
19、st ( l) y ultrasonic examination (2), magnet tic particle examination (3) y liquid penetrant examination (4), macrostructural examination (5) , grain size -examination (6) examination ( ) and microscopic structural examination nonmetallic inclusion Notes ( l ) In accordance with JIS Z 2243 or JIS Z
20、2246. I (2) (3) In accordance with JIS G 0506. In accordance with JIS Z 2343. (4) (5) (6) In accordance with JIS G 0553. In accordance with JIS G 0551. In accordance with JIS G 0556, 12. Marking as specified in 7. of JIS G 0306. . 13. Report ?he markings for the forgings having passed the inspection
21、 shall be The test report shall be as specified in 9. of JIS G 0306. 6. G 3205-1988 Applicable Standards : JIS G 0306-General Rules for Inspection of Steel JIS G 0321-Product Analysis and Its Tolerance for Wrought Steel JIS G 0551-Methods of Austenite Grain Size Test for Steel JIS G 0553-Macrostruct
22、ure Detecting Method for Steel JIS G 0555-Microscopic Testing Method for the Non-Metallic Inclusions JIS G 0565-Methods for Magnetic Particle Testing of Ferromagnetic in Steel Materials and Classification of Magnetic Particle Indication JIS G 0587-Methods for Ultrasonic Examination for Carbon and Lo
23、w Alloy Steel Forgings JIS G 1211-Methods for Determination of Carbon in Iron and Steel JIS G 1212-Methods for Determination of Silicon in Iron and Steel JIS G 1213-Methods for Determination of Manganese in Iron and Steel JIS G 1214-Methods for Determination of Phosphorus in Iron and Steel JIS G 121
24、5-Methods for Determination of Sulfur in Iron and Steel JIS G 1216-Methods for Determination of Nickel in Iron and Steel JIS G 1253-Method for Photoelectric Emission Spectrochemical Analysis of Iron and Steel JIS G 1256-Method for X-Ray Fluorescence Spectrometric Analysis of JIS G 1257-Methods for A
25、tomic Absorption Spectrochemical Analysis of Iron and Steel Iron and Steel JIS Z 2243-Method of Brinell Hardness Test JIS Z 2246-Method of Shore Hardness Test JIS Z 2343-Methods for Liquid Penetrant Testing and Classification of Indic at ion -,-,- - F J I S G*K3205 88 I 4933608 007698 7 W , G 3205-1
26、988 Edition 1 Japanese Text Established by Minister of International Trade and Industry Date of Establishment : 1982-06-15 Date of Revision: 1988-11-01 Date of Public Notice in Official Gazette: 1988-11-02 Investigated by : Japanese Industrial Standards Committee Divisional Council on Iron and Steel Technical Committee on Steel Forgings This English translation is published by: Japanese Standards Association 1-24, Akasaka 4, Minato-ku, Tokyo 107 Japan O JSA, 1989 Printed i n Tokyo by Hohbunsha Co., Ltd.