Entering control of scrap material is continuous- both visual and testing through optical emission spectrometry. One sample from the material source is taken for each dispatched batch. If results lie outside the specific limits a further portion of the same sample may be submitted for analysis. Knowing the composition of the raw material specialist calculated the composition of the laying to the furnace.

Chemical composition of the melted material in furnace during melting time is taking place for each batch of raw material( in gas furnace one batch, - about 500 kg, for induction furnace chemical composition is defying for each melting, i.e. 300-350 kg). . If results lie outside the specific limits specialist determines the necessary composition of the adding material, so that to receive necessary alloy. When the result of optical spectrometry is within the limits determined by specification, material is considered to be ready.

The last two samples are brought from the stream when the material is pour out of the furnace into moulds (these two samples are count as final for each bundle into which the ingots will be strapped). If results lie outside the specific limits a further portion of the same sample may be submitted for analysis. If these results confirm the original results then the material is deemed not to comply with this specification

Chemical composition is determined by method of optical emission spectrometry. Final samples are retested by chemical method.

All sampling and testing methods, making in accordance with Russian GOSTs which strictly correspond to

• AS2612 - ' Aluminium and aluminium alloys - Sampling and preparation of solid samples for optical emission spectrometry' ;
• AS2706 Numerical values - Rounding and interpretation of limiting values;
• BS 1728 - Methods for the analysis of aluminium and aluminium alloys;
• ASTM E34 - Chemical analysis of aluminium and aluminium alloys;

Each ingot bears a marks to enable it to be identified by cast numbers and alloy grade.