In this standard the classification of and specifications for lubricating greases, NGLI-classes 1 to 4 according to DIN 51818, and test methods are established.
DIN 51825:2004 history
2004DIN 51825:2004-06 Lubricants - Lubricating greases K - Classification and requirements
2004DIN 51825:2004 Lubricants - Lubricating greases K - Classification and requirements