BS ISO 1083:2018 pdf download

BS ISO 1083:2018 pdf download

BS ISO 1083:2018 pdf download,Spheroidal graphite cast irons — Classification
1 Scope
This document defines the grades and the corresponding requirements for spheroidal graphite cast irons.
This document specifies two groups of spheroidal graphite cast iron grades by a classification based on mechanical properties measured on machined test pieces prepared from cast samples. The first group deals mainly with ferritic to pearlitic grades. The second group deals with solid-solution strengthened ferritic grades.
This document also gives an informative classification as a function of hardness.
This document does not apply to the following:
— spheroidal graphite cast irons used for pipes, fittings and accessories which are specified in accordance with ISO 2531 and ISO 7186;
— highly alloyed (austenitic) spheroidal cast irons which are specified in accordance with ISO 2892;
— ausferritic cast irons which are specified in accordance with ISO 17804.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. 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 — Charpy pendulum impact test — Part 1: Test method
ISO 945-1, Microstructure of cast irons — Part 1: Graphite classification by visual analysis
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO/TR 15931, Designation system for cast irons and pig irons
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://w w
— ISO Online browsing platform: available at
3.1 spheroidal graphite cast iron
cast material, iron, carbon and silicon-based, the carbon being present mainly in the form of spheroidal graphite particles
Note 1 to entry: Spheroidal graphite cast iron is also known as ductile iron, and less commonly as nodular iron.
6 Manufacture
The method of producing spheroidal graphite cast irons and their chemical composition shall be left to the discretion of the manufacturer who shall ensure that the requirements of this document are met for the material grade specified in the order. For ferritic to pearlitic cast iron grades, the level of the mechanical properties is determined by the ferrite to pearlite ratio. The ferrite to pearlite ratio is normally adjusted by alloying or, less commonly, by heat treatment. For solid-solution strengthened cast iron grades, the level of the mechanical properties is determined by the extent of solid solution strengthening of the ferritic matrix. Solid-solution strengthening is normally governed by the silicon content. For spheroidal graphite cast irons to be used in special applications, the chemical composition and heat treatment may be the subject of an agreement between the manufacturer and the purchaser. All agreements between the manufacturer and the purchaser shall be made by the time of the acceptance of the order.