標準號：IS 12539-1988
發布日期：1989/7/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：1.1 This standard specifies a gravimetric method for determination of the total carbon content in carbides and hardmetals.1.2 This method is applicable to the following having a total carbon content exceeding 4 percent:a) Carbides of chromium, hafnium, molybdenum, niobium, tantalum, titanium, vanadium, tungsten and zirconium;b) Mixture of these carbides and binder metals, free of lubricant; andc) All grades of presintered or sintered hardmetals produced from these carbides.