This document provides the comprehensive list of Chinese Industry Standards - Category: YB; YB/T; YBT.

This Standard specifies the size, shape, technical requirements, test methods, inspection rules, packaging, marking, and quality certificates, etc. of iron-nickelchromium 4J6, 4J47, 4J49 alloy and iron-nickel 4J42, 4J45, 4J50 alloy. This Standard is applicable to sealed iron-nickel-chromium and iron-nickel alloy with permanent expansion matched sealed on electrical components with soft glass or ceramic.

This Standard specifies the classification and code, dimension, shape, technical requirements, test methods, inspection rules, package, marking and quality certificate, etc. of the heat treatment spring steel strips. This Standard is applicable to the heat treatment spring steel strips with thickness no greater than 1.50mm, width no greater than 100mm for manufacturing the spring parts.

This Standard specifies the size, shape, weight, technical requirements, test methods, inspection rules, packaging, marks and quality certificate of double wall copper-brazed steel tubing. This Standard is applicable to the double wall copper-brazed steel tubing that uses copper as brazing material used to make brake tubing, fuel tubing, lubricating oil tubing, heating or coolers and other engineering pipelines in automobile, refrigeration, electric heating, electrical appliances and other industries.

This standard specifies the principle and the rounding-off key points of carrying out rounding off of numerical values and judgment of testing values or its calculated values in metallurgical standardization activities, and the coordination and connection requirements of product standards and test method standards for the rounding interval of index or parameter values.

This Standard specifies the classification, dimension, shape, and tolerance, technical requirements, inspection and test methods, packaging, marking and quality certificate of steel wires for ropes.

This standard specifies the classification and code, the information required for ordering, size, shape, weight and tolerance, technical requirements, test methods, inspection rules, packaging, marking, quality certificate of hot-rolled steel checker plate and strip. This standard applies to diamond-shaped, lentil-shaped, round-bean-shaped and combined-shaped hot-rolled steel checker plate and strip.

This Standard specifies the definition, order contents, dimensions, appearance, weight as well as allowable deviation, technical requirements, test methods, inspection rules, transport, storage, marks, and quality certificate of non-alloy steel, low-alloy steel, and alloy-steel continuous casting square and rectangular blank.

This Standard specifies the definition, order contents, size, shape, weight, permissible deviation, technical requirements, test methods, inspection rules, transportation, storage, marking and quality certificate of continuous casting square and rectangular blank of non-alloy steel, low alloy steel, and alloy steel.

This Standard specifies the terms and definitions, flaw detection principles, flaw detection methods, personnel requirements, flaw detection requirements, test pieces and sample rails, probes, equipment and apparatuses, signal-to-noise ratio, stability, operation, result determination and marking of ultrasonic testing for rails. This Standard is applicable to ultrasonic flaw detection of 37 cm/m ~ 75 kg/m railway symmetrical section rails and asymmetric section rails. Ultrasonic flaw detection of other rails can also be carried out with reference.