... Gr4, Gr5, Gr7, Gr9,Gr12,Gr23 ERTi-1,ERTi-2,ERTi-3,ERTi-4,ERTi-5,ERTi-7,ERTi ... than Steel. But mechanical strength is higher than Steel, 2 times stronger than Aluminium, 5 times stronger than Magnesium. ... EMS,etc.)Why us?Our advantages 1.High quality 2.Reasonable price 3.Strict quality control 4.On time ... time response by E-mail, Telephone or Fax etc., 2.In-time communication on technical points 3.In-time ...