Chernivtsi sheet 30HGSA (30MnB5) 1.2 mm, sheet 65G, 60S2A 1 mm, strip

Chernivtsi sheet 30HGSA (30MnB5) 1.2 mm, sheet 65G, 60S2A 1 mm, strip

Steel grade 30KhGSA is an alloyed structural alloy. The original application was associated with the aviation industry. But due to the excellent technical characteristics, the material quickly became in demand in other areas.
Steel of this brand is often found under the name "ChroManSil". The abbreviation is similar to their three main alloying additives - chromium, manganese, silicon (silicon).
Similar alloys are: 40HFA, 35HM, 40HN, steel 25HGSA and 35HGSA.

Brand characteristics:

  Chemical composition of steel:

     0.28-0.34% - carbon;
     0.9-1.2% - silicon;
     0.8-1.1% - manganese;
     up to 0.03% - nickel;
     0.8-1.1% - chromium;
     up to 0.025% - sulfur, phosphorus;
     not more than 0.3% - copper.

The volume fractions of phosphorus and sulfur are strictly controlled. In the finished alloy, they should not exceed the specified norm. Otherwise, 30KhGSA steel loses its main characteristics, which is unacceptable for some applications.
Purpose of the main alloying additives:

     Chromium - gives steel resistance to the formation of corrosion deposits.
     Silicon - modifies the crystalline structure of the metal, increasing the impact strength.
     Manganese - increases mechanical resistance to shock, dynamic loads. Increases the overall strength of the alloy. Thanks to manganese 30HGSA is more wear-resistant than analogues.

  Alloy steel has high ductility. Resistant to variable forces. Mechanical characteristics are maintained up to 400 degrees Celsius.
Applications:
Steel grade 30HGSA is used for:

     building parts, fasteners, structures with variable load;
     aviation spare parts, shafts;
     mechanical parts working under variable force.

Alloy steel has good weldability. But for a strong connection, the material requires special preparation. The workpiece is heated up to 300 degrees. After welding, the part is smoothly cooled. A sharp temperature drop can cause seam cracks.
Note that the price of 30KhGSA steel is higher than standard carbon grades due to the presence of a large number of alloying additives.
Strip steel hot-rolled steel 60S2A
The strip of hot-rolled steel 60S2A is a metal-roll of a rectangular cross-section. This assortment has a wide scope, since the strip g to is a semi-finished product from which many different products are made. Steel 60S2A is used for the production of brake bands, thrust washers, springs, springs, flanges, collets and other parts that operate without constant shock loads. All products from the 60C2A strip have increased operating conditions.
Hot-rolled steel strip grade 60S2A refers to spring-loaded structural steel. Rolled products are heat treated as delivered. Strip g to steel 60S2A is not used for welded structures. Rental is insensitive to temper brittleness.
Strip gk steel 60S2A has physical and chemical characteristics, which are specified in GOST 103-2006. This document also specifies the dimensions of the rolled products. On the website of the SODRUGESTVO company, you can buy an assortment of the following sizes: 4x25, 4x30, 4x40, 5x40, 5x50, 6x25, 6x30, 6x40, 6x50, 8x25, 8x30, 8x10, 8x36, 8x40, 8x45, 8x50, 10x100, 1 0x30, 10x40, 10x45, 10x60, 10x80, 12x45, 12x50, 14x45, 16x50, 16x120, 16x60, 16x45 mm.
The composition and properties of steel grade 30HGSA and medium alloy steels: medium alloy steels are complexly alloyed with silicon, manganese, chromium, molybdenum, nickel, vanadium, tungsten in various combinations and quantities with a total content of 2.5-10%. In welded structures, medium-alloyed structural and heat-resistant steels are used, supplied in accordance with GOST 4543-71 and special specifications.
Medium alloy structural steels (30KhGSA, 30KhGSNA) contain an increased amount of carbon (up to 0.35 - 0.5%) and are usually alloyed with elements such as silicon, manganese, chromium in an amount of up to 1.2%, often in combination with nickel (1 .5-3%). Heat-resistant steels (20KhNMF, 25KhZNMF, etc.) are characterized by a lower carbon content (as a rule, up to 0.28%) and mandatory alloying with increased amounts of chromium (up to 2-5%) to ensure heat resistance. Additionally, such steels are usually alloyed with molybdenum, as well as vanadium or tungsten and niobium.
High strength properties of medium-alloyed steels (σw=600-2000 MN/m2) are achieved due to the increased content of carbon and alloying elements, which increase the hardenability of the steel and the strength of ferrite, as well as the use of heat treatment - normalization or hardening followed by low or high tempering. Most medium alloy steels for welded structures are in the pearlitic grade. High-strength steels with a tensile strength of up to 1700 MN / m2 (170 kgf / mm2) are also used, subjected to martensite quenching followed by low tempering at 423-573 K (150-300 ° C), for example. The high strength of medium alloy steels is combined with surfaceexcellent special properties with a sufficient level of ductility and resistance to brittle fracture. This combination of properties of medium-alloyed structural and heat-resistant steels determines their use in structures of a particularly critical purpose, operating under difficult conditions in power engineering, heavy and chemical engineering, aircraft building, shipbuilding and other industries.