Standards

YB/T 6255-2024 Active

YB/T 6255-2024 YB/T 6255-2024 Iron ore Determination of metallic iron content by flame atomic absorption spectrometry

This document specifies the method for determining the metal iron content in iron ore by flame atomic absorption spectrometry. This document is applicable to the determination of metal iron content in iron ore, iron concentrate, sintered ore, and pellet ore, with a measurement range (mass fraction) of 0.020% to 0.300%.

Publish Date: 2024-10-24

YB/T 6252-2024 Active

YB/T 6252-2024

This document specifies the general requirements for ultrasonic testing of flash welded and thermite welded joints between bainitic alloy steel frogs and pearlitic carbon steel rails used in railways, including testing specimens, testing instruments and equipment, testing conditions and methods, defect detection and qualification assessment, testing records and reports, etc. This document is applicable to the testing of new welded rail joints between bainitic alloy steel frogs and pearlitic carbon steel rails, as well as in-service rail welded joints.

Publish Date: 2024-10-24

YB/T 6251-2024 Active

YB/T 6251-2024

This document specifies the method of designating the grades of hot-rolled H-section steel used for buckling-restrained bracing, the content of orders, dimensions, shapes, weights, and allowable deviations, technical requirements, testing methods, inspection rules, packaging, marking, and quality certificates. This document is applicable to the manufacture of low yield strength hot-rolled H-section steel used in energy-saving structural components such as earthquake resistance and shock absorption in buildings.

Publish Date: 2024-10-24

YB/T 6250-2024 Active

YB/T 6250-2024 YB/T 6250-2024 Single Rail Hoist Track Hot Rolled Profile Steel。

This document specifies the ordering content, classification, code, dimensions, appearance, weight, and allowable deviations of hot-rolled steel for monorail crane tracks, as well as technical requirements, test methods, inspection rules, packaging, marking, and quality certificates. This document is applicable to hot-rolled steel for monorail crane tracks.

Publish Date: 2024-10-24

YB/T 6249-2024 Active

YB/T 6249-2024 YB/T 6249-2024 Measuring method of AC magnetic-induced longitudinal expansion and contraction characteristics of electrical steel strip (sheet)

This document specifies the general principles and technical details for measuring the magnetostrictive characteristics of electrical steel strips (sheets) using single-chip measuring instruments and optical sensors. This document is applicable to the measurement of the magnetostrictive characteristics of electrical steel strips (sheets) at a frequency of 50Hz or 60Hz. For other magnetization frequencies ranging from 20Hz to 400Hz, the measurement can be carried out with reference to this document.

Publish Date: 2024-10-24

YB/T 6247.2-2024 Active

YB/T 6247.2-2024 YB/T 6247.2-2024 Electrical steel strip (sheet) measurement of total loss ratio - Part 2: DC bias state method

This document specifies the measurement principle, samples, measuring devices, measurement systems, measurements, reproducibility, and test reports for electrical steel strips (sheets) under the condition of alternating current bias magnetization. This document is applicable to grain-oriented and non-grain-oriented electrical steel strips (sheets).

Publish Date: 2024-10-24

YB/T 6247.1-2024 Active

YB/T 6247.1-2024 YB/T 6247.1-2024 Electrical steel strip (sheet) measurement of total loss ratio - Part 1: Harmonic content measurement method including high-order harmonics

This document specifies the measurement principles, samples, measuring devices, measurement systems, and determination methods for the specific total loss of electrical steel strips (sheets) under magnetic polarization conditions with a fundamental frequency of the power frequency and high-order harmonics. This document is applicable to grain-oriented and non-grain-oriented electrical steel strips (sheets).

Publish Date: 2024-10-24

YB/T 6246-2024 Active

YB/T 6246-2024 YB/T 6246-2024, Hot-rolled ribbed steel bars for nuclear power engineering

This document specifies the classification, grades, order content, dimensions, appearance, weight, and allowable deviations, technical requirements, test methods, inspection rules, packaging, marking, and quality certificates of hot-rolled ribbed steel bars used in nuclear power engineering. This document is applicable to hot-rolled ribbed steel bars used in nuclear power engineering.

Publish Date: 2024-10-24

YB/T 6245-2024 Active

YB/T 6245-2024 YB/T 6245-2024 Hot-rolled end plate

This document specifies the specifications and markings, technical requirements, test methods, inspection rules, packaging, marking, and quality certificates for hot-rolled end plates. It is applicable to end plates used for prestressed concrete pipe piles made by the pre-tensioning method, and end plates used for prestressed centrifugal concrete special-shaped piles can be implemented with reference to this document.

Publish Date: 2024-10-24

YB/T 5034-2024 Active

YB/T 5034-2024 YB/T 5034-2024 Cylinder steel for use in crawler track

This document specifies the ordering content of hot-rolled steel for crawler tracks, the naming rules for product specifications, dimensions, shapes, weights, and allowable deviations, technical requirements, test methods, inspection rules, packaging, marking, and quality certificates. This document is applicable to the manufacture of hot-rolled steel for crawler tracks used in construction machinery such as excavators and bulldozers.

Publish Date: 2024-10-24

YB/T 6243-2024 Active

YB/T 6243-2024 YB/T 6243-2024 Hot rolled stainless steel composite steel bars

This document specifies the classification, order content, dimensions, appearance, weight, and allowable deviations, technical requirements, test methods, inspection rules, packaging, marking, and quality certificates of hot-rolled stainless steel composite I-beams, hot-rolled stainless steel composite channel steels, and hot-rolled stainless steel composite angle steels. This document applies to stainless steel composite steels produced by hot rolling, with stainless steel as the cladding and carbon steel (or low-alloy steel) as the base material.

Publish Date: 2024-10-24

YB/T 6242-2024 Active

YB/T 6242-2024 YB/T 6242-2024 Heat-rolled stainless H-section steel bars

This document specifies the designation, dimensions, shape, weight, and allowable deviations of hot-rolled stainless H-section steel, as well as its technical requirements, testing methods, inspection rules, packaging, marking, and quality certificates. This document is applicable to hot-rolled stainless H-section steel.

Publish Date: 2024-10-24