The gb/t706-2016 " hot rolling steel " is the national standard of china and provides for the size, outer form, weight and permissible deviation, technical requirements, test methods, inspection rules, packaging, markings and quality certificates for thermal rolling of edged steel, thermal rolling of edged steel, thermal rollers of typed steel, thermal rollers of steel, thermal rollers of steel, thermal rollers of type h steel, and of type t-sectioned steel。
Here are some key elements of the gb/t706-2016 hot rolling steel
Scope of application: this standard applies to products such as thermal roller edge steel, thermal roller edge steel, thermal roller type steel, thermal roller tank steel, thermal roller steel, thermal roller type h steel, and section t steel。
Size and shape: the criteria specify in detail the permissible deviations of key sizes, such as the height, leg width and waist thickness of the type steel, as well as the permissible ranges of deviations in the shape of bending, reversal, sickle bend, etc. For example, the working steel curve is not greater than 2 mm per metre and the total curve is not greater than 0. 2% of the total length; the reversal is not greater than 1. 5 mm per metre。
Weight allowance deviation: steel type shall be delivered by theoretical weight calculated at a density of 7. 85g/cm3. The permissible deviation of weights shall not exceed 5% and shall apply to a group of persons of the same size and mass of more than 1 ton, if the mass of the same size is not greater than 1t but the root number is greater than 10。
Material and mechanic performance: the standard covers steel brands such as q235 and q355 and specifies the tensile strength, yield strength, stretch rate of each type of steel. For example, q235 has a tensile strength of 375-500 mpa with a stretch rate of 26 per cent; q355 has a yield strength of 355 mpa with a carbon content of 0. 24 per cent。
Surface quality: the standard divides surface defects into permitted repair and prohibited presence. Surface defects affect coating investment, welding performance and durability and therefore require full process control in visual and instrument integration。
Inspection rules: inspections and acceptances of steel types are carried out by the technical quality monitoring department of the supplier, which has the right to inspect and accept the demand side. In accordance with the criteria of gb/t 700, gb/t1591 and the corresponding criteria, the rules of review and acceptance shall be in accordance with gb/t2101。
These are only some of the key information for the gb/t706-2016 hot rolling steel, with specific technical parameters and application scenarios available in full standard or consulting industry experts
Angular steel 80*50*6 is of a wide range, 80 is of a width, in millimetre 50 is of another width, 6 is of a thickness 80*50*6*45*28*4 40*25*3*40*25*4*40*4*50*32*4, which are not common in these markets and are also known as special angles. Steel
