Standards

YB/T 4996-2022 Active

YB/T 4996-2022 Carbon steel wire for Siemens-type heat treatment

This document specifies the terms and definitions, classification and marking, order content, technical requirements, inspection and testing, acceptance methods, packaging, marking, transportation, storage, and quality certificates for carburized steel wires subjected to isothermal heat treatment. This document is applicable to carburized steel wires with a carbon content of 0.32% to 0.90% and a diameter of 0.80mm to 16.00mm, which have undergone isothermal heat treatment using quenching media such as lead solution, salt solution, and water-soluble organic substances. The isothermal heat-treated wire rods can be implemented in accordance with this document.

Publish Date: 2022-09-30

YB/T 4994-2022 Active

YB/T 4994-2022 The method for testing the bending performance of carbon materials

This document specifies the principles, equipment, samples, test conditions, test procedures, calculations, and test reports for the bending performance test of carbon materials at room temperature. This document is applicable to the determination of the bending strength and bending modulus of three-dimensional puncture carbon-carbon composite carbon materials and quasi-three-dimensional needle-punched carbon-carbon composite carbon materials at room temperature. Carbon materials with similar structures can also be implemented in accordance with this document.

Publish Date: 2022-09-30

YB/T 4993-2022 Active

YB/T 4993-2022 Test methods for friction and wear properties of carbon materials

This document specifies the test equipment, samples, test environment, test procedures, calculations, and test reports for the friction and wear performance tests of carbon materials. This document is applicable to the determination of the friction and wear performance of carbon materials under laboratory conditions.

Publish Date: 2022-09-30

YB/T 4992-2022 Active

YB/T 4992-2022 Pyrolytic High Softening Point Coal Asphalt Determination of Softening Point Cold Press Globe Method

This document specifies the instrumentation, sampling, test procedures, result calculation, allowable deviations, and test reports for the determination of the softening point of coal tar by the cold pressing globular method. This document is applicable to the determination of the softening point of coal tar samples with a softening point greater than 157°C.

Publish Date: 2022-09-30

YB/T 4991-2022 Active

YB/T 4991-2022 The determination of insoluble matter content in coal tar products: n-heptane

This document specifies the reagents, instruments, test procedures, data processing, and allowable tolerances for determining the content of n-heptane insolubles in coking products. This document is applicable to the determination of the content of n-heptane insolubles in coking products such as crude oil for carbon black, coal tar, and coal pitch.

Publish Date: 2022-09-30

YB/T 4990-2022 Active

YB/T 4990-2022 Determination of Phenolic Content in Tarro Oil Using Gas Chromatography (GC)

This document specifies the reagents, instruments, test procedures, data processing, and allowable tolerances for determining the phenol content in coking light oil. This document is applicable to the determination of phenol content in coking light oil obtained by coal tar distillation.

Publish Date: 2022-09-30

YB/T 4989-2022 Active

YB/T 4989-2022 Determination of Content of Coke Oven Gas and Coal Tar in Coal Tar by Spectrophotometry

This document specifies the reagents and materials, instruments and equipment, testing procedures, test results, allowable deviations, and test reports for determining the content of coal tar in coke oven gas. This document is applicable to the determination of the content of coal tar in coke oven gas.

Publish Date: 2022-09-30

YB/T 4988-2022 Active

YB/T 4988-2022 phenolic resin fraction

This document specifies the technical requirements, test methods, inspection rules, packaging, marking, transportation, storage, quality certificates, and safety precautions for phenolic heavy oil fractions. This document is applicable to the phenolic heavy oil fractions obtained by mixing coking phenols, pyridines, quinolines residues, and heavy wash oils in a certain proportion after coal tar processing.

Publish Date: 2022-09-30

YB/T 4986-2022 Active

YB/T 4986-2022 Wind power equipment bolt steel

This document specifies the dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking, and quality certificates of bolt steel for wind power equipment. This document is applicable to the manufacture of hot-rolled or quenched and tempered steel bars with a diameter of 20 mm to 80 mm used in bolts for wind power equipment.

Publish Date: 2022-09-30

YB/T 4983-2022 Active

YB/T 4983-2022 Phosphorus iron determination of phosphorus, silicon, manganese, and titanium content by inductively coupled plasma atomic emission spectroscopy

This document specifies the determination of the content of phosphorus, silicon, manganese, and titanium using inductively coupled plasma atomic emission spectrometry. This document is applicable to the determination of the content of phosphorus, silicon, manganese, and titanium in phosphorus iron.

Publish Date: 2022-09-30

YB/T 5288-2022 Active

YB/T 5288-2022 The method for testing the corrosion resistance of carbon materials

This document specifies the reagents, instruments and equipment for corrosion resistance testing of carbon materials, sample preparation, test preparation, test steps, result calculation, test errors, and test reports. This document is applicable to the determination of the corrosion resistance of carbon materials used as anodes in the electrolytic refining of metals and non-metals.

Publish Date: 2022-09-30

YB/T 5189-2022 Active

YB/T 5189-2022 The determination of volatile matter in carbon materials

This document specifies the instrumentation and equipment, test procedures, test results, and precision for the determination of volatile matter in carbon materials. This document is applicable to the determination of volatile matter in carbon materials such as calcined coke, calcined coal, needle coke, graphite products, roasted products, and carbon paste, etc.

Publish Date: 2022-09-30