This page contains technical, mechanical and other properties, as well as characteristics of C255 steel.

Material classification and application of grade C255

Brand: S255
Material classification: Steel for building structures
Application: manufacture of rolled products intended for construction steel structures with welded and other connections

The chemical composition of the material C255 as a percentage

Mechanical properties of C255 at a temperature of 20 o C

Technological properties of C255

Other brands from this category:

Please note that this information about the C255 brand is provided for informational purposes only. The parameters, properties and composition of the real material grade C255 may differ from the values ​​given on this page. More detailed information about the grade C255 can be found on the information resource Grade of steel and alloys. You can check with our managers for information about the availability, delivery time and cost of materials. If you find inaccuracies in the description of materials or found errors, please inform the site administrators using the form feedback. Thanks in advance for your cooperation!

The C225 steel grade is used for the manufacture of sheet and profile metal products intended for the installation and assembly of critical metal structures with bolted, riveted, welded and seam joints. The brand is the most popular and in demand in the construction industry, having no restrictions when performing welding work.

Deciphering steel C255

Marking C means that this steel is intended for use in construction, and the number 255 determines the yield strength of finished rolled products in N / mm 2. It is applied to the metal surface with yellow insoluble paint.

GOST

Requirements for metal must comply with GOST 27772-88, which defines specifications for the manufacture of rolled products for metal structures in construction. In accordance with the state standard, C255 steel is used to produce: angle, I-beam, channel, bent profiles of various configurations, as well as smooth and corrugated metal sheets. The section thickness of rolled elements cannot be more than 30 mm and less than 4 mm.

Composition

The mass fraction of the elements that make up this steel is given in the table of the state standard:

• about 97% iron (Fe);
• 0.22% carbon (C);
• 0.65% manganese (Mn);
• 0.15-0.3% silicon (Si);
• 0.3% chromium (Cr), nickel (Ni) and copper (Cu);
• 0.2% aluminum (Al);
• 0.05% sulfur (S);
• 0.04% phosphorus (P).

When using ores from individual deposits, an increased content of manganese by 0.2% and the presence of arsenic are allowed, but not more than 0.12%.

Analogues of steel С255

By chemical composition and mechanical properties state standard defines the following domestic brands as analogues of C255:

• VSt3sp5, VSt3ps5 and VSt3ps6;
• St3Gps and St3Gsp;
• 18sp, 18Gps and 18Gsp.

Of the foreign analogues according to ISO 630 standardization, the following should be mentioned:

• Fe 360-B (E 235-B)
• Fe 360-C (E 235-C)
• Fe 360-D (E 235-D).

Types of processing and application

The amount of carbon and alloying additives in the chemical composition of C255 steel makes it possible to use any type of welding to connect parts and structural elements. Thermal, laser, hydraulic and mechanical processing technologies can be used for cutting rolled products and cutting sheets. Quite simple drilling, milling and the possibility of threading are noted.

In construction, rolled products made of S255 steel are used for the installation of metal structures of group 1, which includes welded elements designed to work in especially difficult conditions. Including vibration, dynamic and moving loads. The first group includes structural elements of bridge spans, supports for power lines, crane beams, load-bearing trusses, overpasses, stairs and others.

It is allowed to use rolled steel grades in other types industrial production except for construction. For example, for the manufacture of housings and load-bearing elements in mechanical engineering.

Brand: S255
Class: Steel for building structures
Use in industry: production of rolled products intended for building steel structures with welded and other joints
Weldability of material: no restrictions.

Steel grade C255 is one of the most popular and in demand in the construction industry, as it is endowed with excellent strength characteristics and has no restrictions on weldability. It is delivered to facilities in the form of rolled metal (including shaped) for subsequent use as part of various metal structures (connection - welding or any other).

Steel S255: chemical composition and GOSTs for hire

Carbon steel C255 (the proportion of carbon is about 0.2%) is produced in accordance with GOST 27772-88, which determines the following composition of the chemical elements of the steel alloy:

• Fe - about 97%
• C - up to 0.22%
• Mn - up to 0.65%
• Si - 0.15-0.3%
• Ni - up to 0.3%
• Cr - up to 0.3%
• Cu - up to 0.3%
• S - up to 0.05%
• P - up to 0.04%
• N - up to 0.012%

Hot-rolled shaped steel from C255 steel:

• GOST 8509 - equal-shelf corner
• GOST 8510 - unequal corner
• GOST 8239, 26020 - I-beam
• GOST 8240 - channel
• GOST 19425 - I-beam and special channel

In addition, carbon steel 255 is used for the production of rolled products:

• GOST 19903 - sheet
• GOST 82 - universal broadband
• GOST 8568 - sheet with lentil and rhombic corrugation

Bent profiles are also made from steel of this grade: according to GOST 7511, 8278, 8281, 8282, 8283, 9234, etc.

Analogues

Analogues of carbon steel C255 can be:

• St3Gps
• St3Gsp
• VSt3sp5
• VSt3Gps5
• Vst3ps6
• VSt3sp5-1
• VSt3Gps5-1
• 18Gps
• 18Gsp
• E 235-B (Fe 360-B)
• E 235-C (Fe 360-C)
• E 235-D (Fe 360-D)

Steel s255: properties and characteristics

The main mechanical properties of C255 rolled products can be found here:

The use of steel grade C255

Builders distinguish 4 groups of building metal structures, classified according to the degree of their responsibility and the conditions of their operation. The most demanding is the first group, which includes welded structures forced to work in particularly difficult conditions, including those exposed to sufficiently large vibration, dynamic and moving loads. In this case, it is allowed to use only the C255 steel we are considering, as well as C285, C345 or C375.


The first group includes such structures as elements of bridge spans, power transmission line supports, crane beams, unloading and bunker racks, transport galleries, trusses, etc.

steel sheet prices

In APEX metal you can buy sheet st 3 in sheets and rolls at a low price:

• for use in construction
• production of general-purpose products, pipes, bent profiles

Depending on the purpose, steel sheet 3 is produced from grades with different chemical composition and properties in accordance with GOST 380, GOST 19281, GOST 27772, TU.

• Hot-rolled thin and thick plates are made of steel Z of ordinary quality with a chemical composition that must comply with the requirements of GOST 380:

• Thick hot-rolled sheet of high strength calm steel with a basic chemical composition in accordance with GOST 19281 is produced with regulated or controlled rolling with accelerated cooling to ensure the following strength classes:

• Hot-rolled sheet products GOST 27772, intended for the manufacture of welded and other building structures:

Construction steel grades - analogues and replacement

One of the important characteristics of building rolled steel 3 is the resistance to brittle fracture. To confirm these properties, samples of steel sheets are tested for impact bending at lower temperatures.

The level of resistance to brittle fracture of sheet metal according to GOST 27772 is guaranteed by the required value of impact strength (KCU - when tested for impact bending with a concentrator U). For steels smelted according to EN standards, this value is the fracture work factor (KV).