Annealing, quenching and heat treatment, boiler steel
Are you interested in heat treatment of boiler steels from a supplier — Electrovek-Steel? At us you will find only the checked up information on the given question
Buy a boiler steel in a wide range of brands and assortment offers the company Elektrovek-steel. Products are sold at affordable prices from manufacturers. The supplier guarantees timely delivery of rolled metal to any point indicated by the customer.
Features of structure and heat treatment of boiler steels
The initial level of mechanical performance of all grades of boiler steel does not satisfy production, since they all belong to the group of low-carbon alloy steels, which have good ductility and low hardness. Therefore, after rolling, these steels are subjected to heat treatment.
The need for heat treatment is also caused by undesirable transformations in the microstructure of steels. In particular, unalloyed steels with heating up to 350… 450 0 С are prone to spontaneous spheroidization — destruction of strong plates of iron carbide, and their subsequent disintegration into separate sections of the spherical shape.
GOST 5220−79 provides the following types of heat treatment of boiler steels:
Normalization — for sheets of hot-rolled steel grades 16K and 18K. At the request of the consumer sheets of steel of these brands can be produced without normalization;
Sheets of steel grade 15K and 20K are usually manufactured without normalization, but at the request of the customer, normalization can be provided;
Sheets made of steel grade 22K up to 35 mm inclusive are manufactured without heat treatment or heat treated (TH), with a thickness of more than 25 mm — without heat treatment;
Sheets made of low-alloy boiler house are made without heat treatment or heat-treated, including from rolling heating (ТО); On the customer’s request, normalization or tempering with tempering service may be performed;
Sheets made of steel 17GS, 17G1S all thickness, sheets of steel grade 10G2S1 with a thickness of more than 20 mm are made only by heat treated (after normalization or quenching with tempering).
The company Electrovek-steel offers at economically advantageous prices of producers boiler steel sheet, as well as tubular rolling. The supplier ensures the timely delivery of the metal to any point specified by the consumer.
Modes of heat treatment of boiler steels
Specified in the table, which is given below:
|steel grade||The thickness of the sheet,
|Impact strength, J / cm at temperature, ° С
Impact strength after mechanical
Aging at +20 ° C, J / cm
|Not less than|
The company Electrovek-Steel offers the purchase of boiler steels at affordable prices from manufacturers. The supplier ensures the timely delivery of products to the point specified by the customer.