It is worth paying attention to the physical characteristics of steel 17G1S. They allow you to use the material at temperatures from -40 to +475 degrees Celsius, as well as at fairly high pressure values. The steel grade itself belongs to the low-alloy class of structural alloy and without limitation on weldability.
Alloy application
The use of steel 17G1S is the installation of a network of pipelines that are designed to transport a medium with a maximum pressure of up to 75 kg / cm 2 . It is also successfully used for the manufacture of bearing and supporting units of various metal structures. In addition, the following things can be made from it:
- seamless and electric-welded pipes;
- steam and hot water boilers;
- gas pipeline and oil pipeline;
- heat exchangers;
- different types of bent steel;
- various elements for automobile transport, for wagons and some other special-purpose equipment.
Due to its characteristics, the material is widely used in construction, as it is easy to weld and quite resistant to mechanical stress. The thickness of some types of shaped steel reaches 60 cm.
Some important characteristics of metal
One of the most important parameters for steel 17G1S GOST 19282-73 is its cold resistance. Due to the high value of this particular characteristic, the alloy is successfully used for cooling systems, as well as in metal structures that will be operated at low temperatures.
Another very important characteristic is plasticity. Due to this quality, as well as the fact that the weldability of the material is very high, it is excellent for the production of electric-welded pipes with a spiral or longitudinal seam. It is also worth noting that any welding methods can be used without preliminary heat treatment of the steel sheet itself.
Another important parameter is impact strength. It is important to note here that this parameter value of 17G1S steel strongly depends on the chemical composition, operating temperature, and the type of heat treatment that sheet metal underwent. For this reason, when operating products from this alloy, it is very important to take into account the conditions for its manufacture.
Chemical composition
The chemical composition of steel 17G1S is regulated by GOST. As for the exact chemical composition of this alloy, it is as follows:
- The carbon content (C) is from 0.15% to 0.2%. The main purpose of adding carbon is to increase density.
- The chemical substance Si - silicon is added. The quantitative content of 0.4-0.6%, and the goal is the quenching of the alloy.
- Mn - Manganese is added to the composition. Its content is 1.15-1.6%, it is designed to remove oxygen.
- The content of substances such as nickel, chromium and copper does not exceed 0.3%. They are designed to increase corrosion resistance, as well as to protect against cracking during mechanical stress.
- The amount of sulfur is only 0.04%, and the material is intended to improve properties in future processing, if any.
- The main chemical substance is iron. Contained in an amount of 96% of the total mass.
- The composition contains arsenic in an amount of 0.08%. This amount does not make the material toxic, but it also slightly improves rust resistance.
Decoding and general technical specification
Today, 17G1S steel can sometimes be marked as 17G1S-U. In any case, the same steel is meant. This marking is deciphered as follows.
First comes the number 17, which indicates the carbon content in the composition, in hundredths of a percent. Next is G1, which indicates the content of manganese in the composition. The amount is not more than 1%. The letter C indicates that the chemical composition contains silicon. If the letter U is added at the end of the steel grade 17G1S, this means that the alloy has improved basic characteristics.
The main operational characteristics of this brand of steel are as follows:
- short-term strength is present, the limit of which is 490-510 MPa;
- maximum fluidity is 343-355 MPa;
- maximum elongation at break from 20 to 23%;
- The last important performance characteristic is impact strength, which is 390-440 kJ / m 2 .
It is important to add here that these indicators are characteristic of steel at a temperature of 20 degrees Celsius and relate to the alloy of sheet and pipe products.
Processing Technologies for Alloy
Due to the high plasticity threshold, steel is well protected from cracking, welds well and can be used in conditions of severe overheating.
As for the mechanical options for processing the alloy, the following methods can be used:
- lathes and milling machines;
- sandblasting and shot blasting;
- editing, bending;
- drilling or cross cutting.
It is important to note here that during the manufacture of any parts on the machine, the strength and ductility of the material are not lost.
Successfully used this type of processing, as hardening, tempering and annealing. As for the heating operation, for this there is no need for high-tech equipment. It also does not require a lot of time for the operation.
Cost
The price of products from this steel 17G1S varies depending on what type of rolled metal is made of it. It is also worth considering that this steel is not produced everywhere, which means that you need to add funds to the cost that will be spent on delivery. It is logical that the farther the object is from the place of production, the more it will cost. You can also add that products such as pipes, angles, channels, etc., are more expensive than regular sheet metal.