Gb T 9441 2021 Translated English Of Chinese Standard Gbt9441 2021

This Document specifies the nodularity calculation, metallographic sample preparation, inspection rules, inspection items and rating charts, result representation and inspection report of spheroidal graphite cast iron. This Document specifies the methods for evaluating the microstructure of spheroidal graphite cast iron by visual method and evaluating the nodularity of spheroidal graphite cast ion by computer image analysis software.

This standard specifies the method for assessing the microstructure of spheroidal graphite cast iron in optical microscopes. This standard specifies the methods for assessing spheroidizing grade, graphite size, number of nodular graphite, number of pearlite, number of ferrite in dispersed distribution, number of phosphide eutectic, and number of carbide; it lists out the corresponding standard figures.

This Document specifies the cross-sectional shape, size and tolerance, appearance and weight of titanium and titanium alloy bars and wires. This Document is applicable to titanium and titanium alloy wires with a diameter of 0.1mm~7.0mm (hereinafter referred to as wire); titanium and titanium alloy round bars with a diameter of greater than 7.0mm~450.0mm (hereinafter referred to as round bars); titanium and titanium alloy square bars with the side length of 30.0mm~450.0mm (hereinafter referred to as square bars); titanium and titanium alloy rectangular bars with a thickness of 25.0mm~204.0mm and a width of 25.0mm~254.0mm.

This document specifies linear and angular dimension tolerance grades and limit deviations of stamping pieces without tolerance indication. This document applies to metal stamping pieces. Non-metal stamping pieces may refer to this document. The limit deviations specified in this document apply to non-fitted dimensions.

This Document specifies test methods for the flowability of powders for rotational molding. This Document applies to free-flowing powder materials for rotational molding, with particle size D98¡Ü1mm, and apparent density Da¡Ý0.21g/mL.

This document specifies the test methods for the volume resistance and volume resistivity of insulating materials, under DC voltage and temperature not higher than 800 degree-Celcius. This document applies to high-temperature resistant mica plates, alumina ceramics and other materials.

This document specifies the test method for stress, structural change, and phase transition of carbon steel and alloy steel materials by using the principle of micromagnetics. This document is applicable to the test of the stress distribution and its state, microstructure changes, and structural changes of carbon steel, alloy steel, and austenitic stainless steel; for the test of other metal materials, it can be used as a reference.

This document specifies the requirements, test methods, inspection rules and marking, labeling, packaging, transportation and storage of carbon disulfide for industrial use. This document applies to carbon disulfide for industrial use. Note: This product is mainly used in the production of viscose fiber, cellophane, pesticides, rubber additives, flotation agents, chemical raw materials and solvents, etc.