Standards GB - Chinese national standards - Page 451

Niobium and niobium alloys rods and bars

Standard published on 23.11.2007

Designations of semiconductor materials

Standard published on 28.12.2018

Tianium sheet for plate heat exchangers

Standard published on 30.4.2007

Tolerances on dimensions and form of aluminium and aluminium alloy extruded profiles

Standard published on 5.12.2014

Test mothod for thickness of lightly doped silicon epitaxial layers on heavily doped silicon substrates by infrared reflectance

Standard published on 10.1.2011

Test method for thickness of lightly doped silicon epitaxial layers on heavily doped silicon substrates—Infrared reflectance method
Execute Date: may 2026

Standard published on 31.10.2025

Standard for groundwater quality

Standard published on 14.10.2017

Methods for chemical analysis of silicon metal—Part 1Determination of iron content

Standard published on 6.3.2020

Methods for chemical analysis of silicon metal—Part 10Determination of mercury content—Atomic fluorescence spectrometry method

Standard published on 29.8.2016

Methods for chemical analysis of silicon metal—Part 11Determination of chromium content—1,5-Diphenylcarbohydrazide spectrophotometric method

Standard published on 29.8.2016