ASME SA-182-2019 pdf free
ASME SA-182-2019 pdf free.Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges,Forged Fittings, and Valves and Parts for High-Temperature Service.
7.2 lAn.. Alloy Steeb and Ferritic and Murwns.tic SIUiflkS! Steels—The low alloy steels and ferritic and maitensitic stainless steels shall he heat treated in accordance with the requirements of 7.1 and Table I. When more than one heat treatment option is listed for a Grade in Table I, any one of the heat treatments listed shall be performed. The selection of the heat treatment shall he at the manufacturer’s option. unless otherwise stated in the purchase order.
7.2.1 Liquid Quenching—Except as pcnnitted in 72.2. for F I. F 2. and F 3. and when agreed to by the purchaser. liquid quenching followed by tempering shall be permitted provided the temperatures in Table I for each grade are used.
7.2.1.1 Marking—Parts that are liquid qucnchcd and tempered shall be marked QT”
7.2.2 Alternatively. Grade F I. F 2. and F 12, Classes I and
2 may be gisen a heat Ireaunent of 1200 ‘F 1650 CI minimum after final hot or cold forming.
7.3 .4uNtenitic ,,,d Ferritk-Austen,tu Stainle Steels— Except as permitted by 7.5, the austenitic and ferntic-austenitic stainless steels shall be heat treated and liquid-quenched in accordance with the requirements of 7.1 and Table I.
7.3.1 Alternatively. immediately following hot working. while the temperature of the forging is not less than the minimum solution annealing temperature specified in Table I. forgings made from austenitic grades (except grades F 304H. F
309)-I. F 310. F 31011. F 3l6H. F3I6Ti. F 321. F 32lH. F 347. F 347H, F 348. F 34XH. F 45. and F 56) may be individually rapidly quenched in accordance with the requirements of Table. I. Ferritic-austenitic grades may be solution annealed without cooling below 10(X) °F by being re-heated to the solution annealing temperature required in Table I. held for a time sufficient to dissolve phases and precipitates which may cause a reduction in corrosion or mechanical properties, and quenched in accordance with Table I.
7.3.2 See Supplementary Requirement S8 if a particular heat treatment method is to he employed.
7.4 lime of Heat Treatment—Heat treatment of forgings may he performed before machining.
7.5 Forged or Rolled Bar—Forged or rolled austenilic stainless bar from which cylindrically shaped parts arc to be machined, as permitted by 6.4, and the parts machined from such bar, without heat treatment after machining, shall be furnished to the annealing and quenching or rapid-cooling requirements of Specification A484/A484M or this specification. with subsequent light cold drawing and straightening permitted (see Supplementary Requirement S3 if annealing must he the final operation).
8. Chemical Composition
8.1 A chemical heat analysis in accordance with Specification A%l/A961M shall be made and conform to the chemical composition prescribed in Table 2.
8.2 Grades to which lead, selenium, or other elements are added for the UI0SC of rendering thc material free-machining shall not be used.
8.3 Starting material produced to a specification that spccilically requires the addition of any element beyond those listed in Table 2 for the applicable grade of material is not permitted.
8.4 Steel grades covered in this specifIcation shall not contain an Lln%pecified element, other than nitrogen in stainless steels, for the ordered grade to the extent that the steel conforms to the requirements of another grade fur which that element is a specified element having a required minimum content. For this requirement. a grade is defined as an alloy described individually and identified by its own UNS designation or Grade designation and identification symbol in Table 2.
8.5 Pmduct .4naivsi.—The purchaser may make a product analysis on products supplied to this specification in accordance with Specification A%l/A%IM.
9. Mechanical l’ropcrlies
9.1 The material shall conform to the requirements as to mechanical properties for the grade ordered as listed in Table 3.
9.2 Mechanical test specimens shall be obtained from production forgings. or from separately forged test blanks prepared from the stock used to make the finished product. In either case, mechanical test specimens shall not be removed until after all heat treatment is complete. If repair welding is required. test specimens shall not be removed until after post-weld heat treatment is complete, except for ferritic grades when the post-weld heat treatment is conducted at least 50 CF 130 C1 below the actual tempering temperature. When test blanks arc used, they shall receive approximately the same working as the finished product. The test blanks shall be heat treated with the finished product and shall approximate the maximum cross section of the forgings they represent.ASME SA-182 pdf download.
