a) specification of functional unit used for LCI calculation of steel products;

b) definition of system boundary used for LCI calculation of steel products;

c) evaluation of scrap in LCI calculation of steel products;

d) evaluation of co-products in LCI calculation of steel products;

e) reporting of LCI calculation results of steel products.

The application of LCI calculation results, including life cycle impact assessment (LCIA), is outside the scope of this Standard.

NOTE The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 20915 : 2018 Life cycle inventory calculation methodology for steel products (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

This method is applicable to determination of tungsten content rate (mass fraction) of 10.0 % or over to and including 20.0 % in steel.

However, it is not applicable to steels containing one or more coexisting components with content rate [mass fraction (%)] over the upper limits specified

This method applies to the determination of each component within the range specified, however, it is not applicable to steels when they contain one or more components of content rate over the maximum limit of determination specified .

In the case of arsenic, this method is not applicable to steels of iron content rate under 90 % (mass fraction).

This method applies to the determination of each component within the range specified , however, it is not applicable to steels when they contain one or more components of content rate over the maximum limit of determination specified .

In the case of arsenic, this method is not applicable to steels of iron content rate under 90 % (mass fraction).

This method applies to the determination of each component within the range specified in table 1, however it is not applicable to steels in which the iron content (mass fraction) is less than 92 %, steels which contain one or more components of content rate over the maximum limit of determination specified in table 1, or steels which contain components not specified in table 1 (e.g. carbon) by mass fraction 1.0 % or more (for tungsten, mass fraction 0.1 % or more).