YB/T 4135-2005 Nitride ferrochrome with high nitrogen content

YB/T 4135-2016 high-nitrogen chromium iron

GB/T 3650-1995 The general rules for inspection、 packing、storing transportation、marking and certification of ferroalloy GB/T 3650-2008 The general rules for inspection,packing,storing,transportation,marking and certification of ferroalloy GB/T 4010-1994 Ferroalloys—Sampling and preparation of samples for chemical analysis GB/T 4010-2015 Ferroallys sampling and preparation of samples for chemical analysis GB/T 5687.1-1985 Methods for chemical analysis of ferrochromium—The ammonium persulfate oxidation volumetric method for the determination of chromium content GB/T 5687.2-1985 Methods for chemical analysis of ferrochromium—The gravimetric method for the determination of silicon content GB/T 5687.2-2007 Ferrochromium,silicochromium and nitrogen-bearing ferrochromium—Determination of silicon content—The perchloric acid dehydration gravimetric method GB/T 5687.3-1985 Methods for chemical analysis of ferrochromium—The molybdenum blue photometric method for the determination of phosphorus content GB/T 5687.4-1985 Methods for chemical analysis of ferrochromium—The neutralization titration method for the determination of nitrogen content GB/T 5687.4-2016 Nitrogen-bearing ferrochromium and nitride ferrochrome with high nitrogen content—Determination of nitrogen content—The distillation-neutralization titration method GB/T 5687.5-1988 Methods for chemical analysis of ferrochromium—The infrared absorption method for the determination of carbon content GB/T 5687.8-1988 Methods for chemical analysis of ferrochromium—The infrared absorption method for the determination of sulfur content GB/T 5687.9-1988 Methods for chemical analysis of ferrochromium—The combustion-neutralization titration method for the determination of sulfur content