Good evening to all at LJST
I refer to the suspect low hardness of Quard 450 that we bought from
LJC Shanghai stock - (thk 5 mm and 8 mm)
I met Tisson Li today at LJC Singapore and passed him the 2 samples that I tested in Singapore
by using HBW with ball dia 10 mm. Tisson will help us to verify the hardness using ball diameter
5 mm and ball diameter 10 mm. He will also check the chemical composition as to whether these
samples conform to Quard 450.
I have also told him that we are waiting for the official report from ISIT (third party test center).
Aek: please cut another one piece each of thickness 5 mm and 8 mm (about the same size) from
another plate number of the same heat and pass to Jo.
Jo: please mail the hardness reports to Tisson and Sammy so that they have the full details;
including the mill certificate, NCR and photo of how we take the samples. Please also get the
2 samples from Aek and send to Tisson Li in Changzhou. He will also help us to do the hardness
tests and chemical analysis to look into possible batch issue.