GB/T 4697-2017Hot rolled steel section for mine timbering (English PDF)

1 Scope

This Standard specifies the ordering content, dimensions, shape, weight and tolerances, technical requirements, test methods, inspection rules, packaging, marking and certification of hot rolled U- and I-type steel section for mine timbering.

This Standard applies to hot rolled U- and I-type steel section for mine timbering (hereinafter referred to as steel section).

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this document.

GB/T 222, Permissible tolerances for chemical composition of steel products

GB/T 223.5, Steel and iron - Determination of acid-soluble silicon and total silicon content – Reduced molybdobsilicate spectrophotometric method

GB/T 223.11, Iron, steel and alloy – Determination of chromium content – Visual titration or potentiometric titration method

GB/T 223.12, Methods for chemical analysis of iron, steel and alloy – The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content

GB/T 223.14, Methods for chemical analysis of iron, steel and alloy – The n- benzoy-n-phenylhydroxylamine extraction photometric method for the determination of vanadium content

GB/T 223.23, Iron, steel and alloy – Determination of nickel content – The dimethylglyoxime spectrophotometric method

GB/T 223.36, Methods for chemical analysis of iron, steel and alloy – The neutral titration method for the determination of nitrogen content after distillation separation

GB/T 223.37, Methods for chemical analysis of iron, steel and alloy – The indophenol blue photometric method for the determination of nitrogen content after distillation separation

GB/T 223.53, Methods for chemical analysis of iron, steel and alloy – The flame atomic absorption spectrophotometric method for the determination of copper content

GB/T 223.54, Methods for chemical analysis of iron, steel and alloy – The flame atomic absorption spectrophotometric method for the determination of nickel content

GB/T 223.59, Iron, steel and alloy – Determination of phosphorus content –

Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method

GB/T 223.63, Methods for chemical analysis of iron, steel and alloy – The sodium (potassium) periodate photometric method for the determination of manganese content

GB/T 223.68, Methods for chemical analysis of iron, steel and alloy – The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content

GB/T 223.69, Iron, steel and alloy – Determination of carbon contents – Gas- volumetric method after combustion in the pipe furnace

GB/T 223.72, Iron, steel and alloy – Determination of sulfur content – Gravimetric method

GB/T 228.1, Metallic materials – Tensile testing – Part 1 : Method of test at room temperature

GB/T 229, Metallic materials – Charpy pendulum impact test method

GB/T 232, Metallic materials – Bend test

GB/T 2101-2008, General requirement of acceptance, packaging, marking and certification for section steel

GB/T 2975, Steel and steel products – Location and preparation of samples and test pieces for mechanical testing

GB/T 4336, Carbon and low-alloy steel – Determination of multi-element contents

– Spark discharge atomic emission spectrometric method (routine method)

GB/T 20066, Steel and iron – Sampling and preparation of samples for the […]