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1、INTERNATIONAL STANDARD IS0 9725 First edition 1992-12-01 Nickel and nickel alloy forgings Pi b) type of test sample (see 7.2); c) determination of 1 % proof stress, (see 9.2.3); d) hardness as acceptance test (see 6.1.6); e) individual forging marking (see 10.2); f) purchaser or third party inspecti
2、on (see clause 11); g) declaration of conformity (see clause 12) Precipitation-hardenable alloy forgings shall be heat treated in accordance with table3 to the condition as ordered. 6.1.4 Grain size Forgings of alloys NW8810 (FeNi32Cr21AITi-HC) and NW8811 (FeNi32Cr21AITi-HT) shall have a grain size
3、ASTM No. 5 or coarser (average diameter 0,06 mm or greater). 6.1.5 Creep or stress rupture properties Where applicable, forgings of precipitation- hardenable alloys shall meet the creep or stress rupture requirements of table 4. 6.1.6 Hardness If it is required that qualification and acceptance of f
4、orgings be based on hardness instead of tensile properties, the hardness values to be met and the method of hardness test to be used shall be speci- fied on the order form or drawing. 6.1.7 Dimensional tolerances 6 Requirements 6.1 Requirements for forgings heat treated by the manufacturer Dimension
5、s and tolerances shall be as specified on the order form or drawing. 6.1.8 Surface condition Unless required in the hot-finished temper, forgings shall be supplied in the annealed, solution treated or solution and precipitation treated temper. Unless otherwise specified, precipitation-hardenable all
6、oy forgings shall be supplied in the solution treated temper. 6.1.1 Composition Heat analysis shall meet the composition limits specified in table 1. The composition limits do not preclude the possible presence of other elements that are not specified. If the purchaser s requirements necessitate lim
7、its for any other element that is not specified, these shall Forgings shall be clean and free from detrimental surface imperfections. NOTE 3 Where appropriate, the acceptance criteria should be agreed between the purchaser and the supplier. 6.2 Requlrements for forgings to be heat treated by the pur
8、chaser 6.2.1 Composition Heat analysis shall meet the composition limits specified in table 1. The composition limits do not preclude the possible presence of other elements that are not specified. If the purchaser s requirements necessitate limits for 2 Copyright International Organization for Stan
9、dardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 21:20:09 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9725:1992(E) any other element that is not specified, these shall 7.2.2 Integral test sa
10、mples shall be provided by be agreed between the purchaser and the supplier. extensions or prolongations on one or both ends of The percentage content of elements shown as “re- the forgings; they shall not be separated from the mainder” shall be calculated by difference from forgings until all heat
11、treatment has been com- 100 %. pleted. 6.2.2 Temper Unless otherwise specified, forgings to be heat treated by the purchaser shall be supplied in the hot-worked temper. If the forgings are to be supplied in other than the fully heat-treated condition, the test samples shall be separated from the for
12、gings only if required by the purchaser. 7.2.3 Test samples machined from the body of the 6.2.3 Precipitation-hardenable alloys forgings shall be taken in the final heat-treated con- dition. The supplier of precipitation-hardenable alloy forgings shall demonstrate the capability of meeting the requi
13、rements specified in table2 and/or table4, by testing samples heat treated in accordance with 7.3 Heat treatment of test samples 7.3.1 Forgings supplied in hot-worked temper table 3. 6.2.4 Dimensional tolerances If appropriate, test samples selected in accordance with 7.2 shall be annealed or soluti
14、on and precipi- tation treated in accordance with table3 prior to Dimensional tolerances shall conform to the re- quirements specified on the order form or drawing. 6.2.5 Surface condition testing. 7.3.2 Forgings supplied in heat-treated temper Test samples selected in accordance with 7.2 shall be h
15、eat treated with the forging they represent. Forgings shall be clean and free from detrimental surface imperfections. 8 Number of tests NOTE 4 Where appropriate, the acceptance criteria should be agreed between the purchaser and the supplier. 8.1 Chemical analysis, one test per heat. 7 Sampling 7.1
16、Chemical analysis 8.2 Forgings heat treated by the manufacturer Tensile strength and creep of stress rupture and grain size shall be tested at a frequency of one test per lot. 7.1.1 Representative heat analysis samples shall be taken during pouring or subsequent processing. 8.3 Forgings to be heat t
17、reated by the purchaser 7.1.2 Product analysis samples shall be taken from the finished product. Capability tests for tensile strength, creep or stress rupture shall be tested at a frequency of one test per lot. 7.2 Tensile, creep or stress rupture test 9 Test procedures Test specimens shall be take
18、n either as separate test samples (see 7.2.1), as integral test samples (see 7.2.2) or as test samples machined from the body of the forgings. Unless otherwise specified, the sampling procedure and the location of samples representing the lot shall be at the option of the supplier. 7.2.1 Separate te
19、st samples shall be prepared from the same heat from which the forgings are made and forged to obtain samples. Separate test sam- ples shall be identifiable to the forgings they repre- sent. 9.1 Chemical analysis 9.1.1 The method of chemical analysis shall be at the option of the supplier, however,
20、in cases of dis- pute the method specified in the relevant lnter- national Standard shall be used. If no International Standard exists, an analytical method that can be calibrated to a reference stan- dard agreed upon by the purchaser and the supplier shall be used. 9.1.2 For a list of IS0 analytica
21、l standards, see an- nex A. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 21:20:09 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9725:1992(E) 9.
22、2 Tensile testing 9.6 Retests 9.2.1 Tensile testing shall be carried out in ac- cordance with IS0 6892. 9.2.2 The largest possible round specimen, not ex- ceeding 15 mm in diameter on the gauge length, shall be used. (See annexes C and D of IS0 6692). 9.2.3 The offset method shall be used for the de
23、- termination of proof stress. An offset of 0,2 % (R,) shall be standard. However, a 1 % proof stress (R, however, the specified minimum elongation has to be met. 10 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/99
24、72545001 Not for Resale, 04/22/2007 21:20:09 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9725:1992(E) Annex A (normative) List of IS0 methods of analysis I IS0 6351:1985, Nickel - Determination ofsilver, bismuth, cadmium, cobalt, copper, iron, manganese, lead and zi
25、nc contents - Flame atomic absorption spectrometric method. 2 IS0 7523:1985, Nickel -Determination ofsilver, arsenic, bismuth, cadmium, lead, antimony, selenium, tin, tellurium and thallium contents - Electrothermal atomic absorption spectro- metric method. S IS0 7524:1985, Nickel, ferronickel and n
26、ickel alloys - Determination of carbon content - Infra-red absorption method after induction furnace combustion. 4 IS0 7525:1985, Nickel - Determination of sulfur content - Methylene blue molecular absorp- tion spectrometric method after generation of hydrogen sulfide. 5 IS0 7526:1985, Nickel, ferro
27、nickel and nickel alloys - Determination of sulfur content - Infra-red absorption method after induction furnace combustion. 6 IS0 7527:1985, Nickel, ferronickel and nickel alloys - Determination of sulfur content - lodimetric titration method after induction fur- nace combustion. 7 IS0 7528:1989, N
28、ickel alloys - Determination of iron content - Titrimetric method with pot- assium dichromate. S IS0 7529:1989, Nickel alloys - Determination of chromium content - Potentiometric titration method with ammonium iron sulfate. 9 IS0 7530-1:1990, Nickel alloys - Flame atomic absorption spectrometric ana
29、lysis - Part I: Genera/ requirements and sample dissolution. 1) To be published. IO IS0 7530-2:1990, Nickel alloys - Name atomic absorption spectrometric analysis - Part 2: Determination of cobalt content. II IS0 7530-3:1990, Nickel alloys - Flame atomic absorption spectrometric analysis - Part 3: D
30、etermination of chromium con tent. 12 IS0 7530-4:1990, Nickel alloys - Name atomic absorption spectrometric analysis - Part 4: Determination of copper content. 13 IS0 7530-5:1990, Nickel alloys - Flame atomic absorption spectrometric analysis - Part 5: Determination of iron content. 143 IS0 7530-6:1
31、990, Nickel alloys - Flame atomic absorption spectrometric analysis - Part 6: Determination of manganese content. 15 IS0 7530-7:1992, Nickel alloys - Flame atomic absorption spectrometric analysis - Part 7: Determination of aluminium content. Is IS0 7530-8:1992, Nickel alloys - Flame atomic absorpti
32、on spectrometric analysis - Part 8: Determination of silicon content. 17 IS0 7530-9:-l), Nickel alloys - Flame atomic absorption spectrometric analysis - Part 9: Determination of vanadium content. 18 IS0 9388:1992, Nickel alloys - Determination of phosphorus content - Molybdenum blue molecular absor
33、ption specfromefric method. I91 IS0 9389:1989, Nickel alloys - Determination of cobalt content - Potentiometric titration method with potassium hexacyanoferrate(/). 11 1,. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standard
34、s 1/9972545001 Not for Resale, 04/22/2007 21:20:09 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9725:1992(E) UDC 669.24-l 34 Descriptors: nickel, nickel alloys, forgings, specifications, tests, marking. Price based on 11 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 21:20:09 MDTNo reproduction or networking permitted without license from IHS -,-,-