ASTM A182:2019 pdf download.Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges,Forged Fittings, and Valves and Parts for High-Temperature Service.
8. Chemical Composition
8.1 A chemical heat analysis in accordance with Specification A961/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 purpose of rendering the material free-machining shall not be used.
8.3 Starting material produced to a specification that specifically 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 unspecified element, other than nitrogen in stainless steels, for the ordered grade to the extent that the steel conforms to the requirements of another grade for 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 Product AnaIsis—The purchaser may make a product analysis on products supplied to this specification in accordance with Specification A961/A9oIM.
9. Mechanical Properties
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 he removed until after post-weld heat treatment is complete, except for ferritic grades when the post-weld heat treatment is conducted at least 50 °F [30 °C1 below the actual tempering temperature. ‘When test blanks are 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.
9.3 For normalized and tempered, or quenched and tempered forgings, the central axis of the test specimen shall be taken at least ¼ T from the nearest surface as-heat-treated, where T is the maximum heat-treated thickness of the represented forging. In addition, for quenched and tempered forgings, the mid-length of the test specimen shall be at least T from all other surfaces as-heat-treated, exclusive of the T dimension surfaces. When the section thickness does not permit this positioning, the test specimen shall be positioned as near as possible to the prescribed location, as agreed to by the purchaser and the supplier.
9.3. 1 With prior purchase approval, the test specimen for ferritic steel forgings may be taken at a depth (t) conesponding to the distance from the area of significant stress to the nearest heat-treated surface and at least twice this distance (2 t) from any second surface. However, the test depth shall not be nearer to one treated surface than ¾ in.
ASTM A182:19 pdf download
