EN 1560-2011 pdf download.Founding-Designation system for cast iron – Material symbols and material numbers.
This EN 1560 estabhshes a material designation system either by symbols or by numbers for cast iron.
The designation system by symbols is applicable to:
a) standardized cast iron materials (see 2.1);
b) non-standardized cast iron materials (see 2.2).
The designation system by numbers is only applicable to standardized cast iron materials (see 2.1). NOTE The use of a designation system by symbols does not necessanly imply that the material is standardized,
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
standardized cast Iron material
cast iron material which has been specified in a European Standard
2.2
non-standardized cast iron material
cast iron material which has not been specified in a European Standard, but is manufactured and/or used in CEN member countries
3 Designation of cast Iron materials by symbols
3.1 General
There shall be only one designation by symbols for each cast iron material.
3.2 Material symbol structure
3.2.1 Overall structure
The designation by symbols shall occupy a maximum of six positions. There shall be no spaces between any
of the used positions.
— Position 1: EN- (see 3.2.2):
— Position 2: Symbol for cast Iron (see 3.2.3);
— Position 3: Symbol for graphite structure (see 3.2.4):
— Position 4: Symbol for microstructure or macrostructure (see 3.2.5);
— Position 5: Symbol for classification either by mechanical properties or by chemical composition (see
3.2.6);
— Position 6: Symbol for additional requirements (see 3.2.7).
The overall structure of the designation system by synbds is shown in Annex A.
3.2.2 Position I
The prefix EN- shall only be used for standardized materials.
NOTE If the European material standard (e.g. EN 1561) Is presented in association with the material symbol (e.g.
EN-GJL-150). then the prefix EN of the symbol designation may be omitted (e.g. EN 1561 -GJL-1 50).
3.2.3 Position 2
The symbol GJ with G for cast and J for iron shall be used.
3.2.4 Position 3
If the graphite structure is to be specified, then the appropriate letter given in Table 1 shall be used.
3.2.6.2.2 Tensile strength
The tensile strength shall be indicated by the appropriate minimum value of the grade in megapascals. e.g.:
EN-GJL-1 50C:
EN-GJL-1 50.
If required, the elongation shall be indicated by the appropriate minimum value of the grade In percent, which follows the indication of the minimum tensile strength. It shall be separated from the other symbols in position 5 by a hyphen, e.g.:
EN-GJS-350-22C
EN-GJMW-450-7.
If impact energy is required the test temperature used to determine its value shall be indicated by the letters given in Table 4.
The letters given in Table 4, if required. shall follow the figures of mechanical properties. It shall be separated from the other symbols in position 5 by a hyphen, e.g.:
EN-GJS-400-1 8-RT:
EN-GJS-350-22-LT.
3.2.6.2.3 Hardness
When cast Iron materials are classified by hardness this shall be indicated by one of the three following symbols:
a) HB for Bnnell hardness;
b) HV for Vickers hardness;
c) HR for Rockwell hardness.
These letters shall be followed by two or three figures representing the hardness range. e.g.:
EN-GJL-HB1 55;
EN-GJS-HB230:
EN-GJN-HV350;
EN-GJN-HRC34.
3.2.6.3 Classification by chemical composition
3.2.6.3.1 Low alloyed grades
When there is a need to specify the chemical elements with one decimal digit, then the symbols In posItion 5 shall be as follows:
a) Classification without Indication of carbon content
Chemical symbols of significant alloying elements in the sequence of falling contents of the elements. The average contents of these elements shall be indicated in percentage multiplied by the factor 10. The digits for these values shall be separated from each other by a hyphen, e.g.:
EN-GJS-SiMo35-7
b) Classification with indication of the carbon content
When the indication of the carbon content Is required, It shall be Indicated by its percentage times 100 (e.g. 300 for 3 %), preceding the chemical symbols in position 5.
All other indications of chemical composition shall follow the system according to 3.2.6.3 1. a). e.g.:
EN-GJS-32OSiMo45-1 0
3.2.6.3.2 High alloyed grades
When the average content of at least one alloyin9 element is  5 % and there is no need to classify one of the chemical elements with one decimal digit, then the letter X shall be the first symbol In position 5. The remaining symbols in position 5 shall be as follows:EN 1560-2011 pdf download.

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