GB/T 31939-2015Hot-rolled steel plates (sheets) and strips for coal mine refuge chamber (English PDF)

1 Scope

This standard specifies the grades that way mine rescue capsule with hot rolled steel sheet and strip, ordering the content, size, shape, weight and allow partial

Poor, technical requirements, test methods, inspection rules, packaging, marking and quality certification.

This standard applies to a thickness of 3mm ~ 20mm hot rolled steel sheet and strip (hereinafter referred to as the steel sheet and strip).

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 222 chemical composition of finished steel tolerance

GB/T 223.5 steel measuring soluble silicon and total silicon content reduced silicon molybdate salt spectrophotometric method

GB/T 223.9 steel and aluminum alloys - Determination of chromium content Azure S Spectrophotometry

Determination of GB/T 223.11 steel and alloy chromium content of visual titration or potentiometric titration

GB/T 223.12 Methods for chemical analysis of iron, steel and alloys of sodium carbonate separation - diphenyl hydrazine spectrophotometric determination of chromium content

GB/T 223.14 Methods for chemical analysis of iron, steel and alloys, tantalum reagent extraction and spectrophotometric determination of vanadium content

Spectrophotometric determination of titanium content GB/T 223.16 Methods for chemical analysis of iron, steel and alloy The chromotropic acid

GB/T 223.19 Methods for chemical analysis of iron, steel and alloy neocuproine - chloroform extraction spectrophotometric determination of copper content

GB/T 223.23 steel alloy of nickel and copper Determination of succinic oxime spectrophotometry

Determination of nickel content GB/T 223.25 Methods for chemical analysis of iron, steel and alloy copper succinic gravimetric method

GB/T 223.26 steel and alloy - Determination of molybdenum content - Thiocyanate spectrophotometric

GB/T 223.40 Determination of steel and alloy niobium content sulphochlorophenol S spectrophotometry

GB/T 223.62 Methods for chemical analysis of iron, steel and alloy butyl acetate extraction spectrophotometric determination of phosphorus content

GB/T 223.63 Methods for chemical analysis of iron, steel and alloy The sodium (potassium) for Determination of amount

Determination of sulfur content of potassium iodate titration method after GB/T 223.68 Methods for chemical analysis of iron, steel and alloy tube furnace combustion

GB/T 223.69 after carbon and alloy steel - Determination of the pipe furnace combustion gas volumetric method

RT Test Method. Test Part 1 GB/T 228.1 metallic materials tensile

High Temperature Test Method. Test Part 2 GB/T 228.2 metallic materials tensile

GB/T 229 metal Charpy pendulum impact test method

GB/T 232 metallic materials - Bend test

General provisions GB/T 247 steel sheet and strip packaging, marking and quality certificate

Size GB/T 709 hot rolled steel sheet and strip, shape, weight and tolerance

GB/T 2975 Steel and steel products for mechanical testing and sample preparation position

GB/T 4336 carbon steel and low alloy steel spark source atomic emission spectrometry method (conventional method)

GB/T 8170 repair value expressed about the rules and limit values and judgment

GB/T 17505 Steel and steel products General technical delivery requirements

GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method

GB/T 20123 Steel - Determination of total carbon and sulfur content of the high-frequency induction furnace combustion infrared absorption method (conventional method)

GB/T 20124 Steel - Determination of nitrogen content of inert gas fusion thermal conductivity method (conventional method) […]