BS ISO 4991:2015 pdf free
BS ISO 4991:2015 pdf free.Steel castings for pressure purposes
BS ISO 4991 covers steel castings for pressure containing parts.
It includes materials which are used for the manufacture of components subject to pressure vessel codes and components not subject to codes.
This International Standard relates to castings manufactured from unalloyed and alloyed steel grades (characterized by their chemical composition, Table 1, and mechanical properties, Tables 2, 3, 4 and 5).
NOTE Annex D gives information on ISO grade designation and available UNS numbers which are similar to the ISO grade designation.
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 148-1, Metallic materials一Charpy pendulum impact test一Part 1: Test method
ISO 4885, Ferrous products一Heat treatments一Vocabulary
ISO 4990, Steel castings一General technical delivery requirements
ISO 6892-1, Metallic materials一Tensile testing一Part 1: Method of test at room temperature
ISO 6892-2, Metallic materials一Tensile testing 一Part 2: Method of test at elevated temperature
ISO 11970, Specification and approval of welding procedures for production welding of seel castings
ISO 13520, Determination fferrite content in austenitic stainless steel castings
For the purposes of this document, the terms and definitions given in IS0 4885 and ISO 4990 apply.
Materials specified in this International Standard shall conform to the applicable requirements of ISO 4990 including the supplementary requirements listed in Annex A that are indicated in the enquiry and purchase order.
The mechanical properties shall comply with the values given in Tables 2, 3, 4 and 5.
Mechanical properties shall be measured on test pieces taken from test blocks (according to IS0 4990).
The tensile tests at room temperature shall be carried out according to ISO 6892-1 and, if specified, impact tests according to ISO 148-1.
If required by agreement at the time of enquiry and order, impact energy properties at low temperature shall comply with Table 3.
If required by agreement at the time of enquiry and order, impact energy values at room temperature shall comply with Table 4.
If required by agreement at the time of enquiry and order, verification of the elevated temperature proof stress values shall be carried out at elevated temperatures in accordance with ISO 6892-2. In such a case, the values shall comply with Table 5.
Creep resistance mean values are given for information, for some grades in Annex C.BS ISO 4991 pdf download.
