GOST 4543-71 Rolled alloy structural steel. Specifications

NATIONAL STANDARDS

STEEL IS QUALITY AND HIGH QUALITY

Sections and shaped steel, calibrated steel

Part 1

Moscow IPK PUBLISHING HOUSE OF STANDARDS 2004

INTERSTATE STANDARD

Date of introduction 01/01/73

This standard applies to hot-rolled and forged steel with a diameter or thickness of up to 250 mm, calibrated and with a special surface finish made of alloy structural steel, used in a heat-treated state.

In terms of chemical composition standards, the standard applies to all other types of rolled products, ingots, forgings and stampings.

(Changed edition, Amendment No. 2, 5).

CLASSIFICATION

1.1. Depending on the chemical composition and properties, structural steel is divided into categories:

quality;

high quality - A;

especially high quality - Sh.

Notes:

1. Particularly high-quality steel includes electroslag remelted steel.

2. (Deleted, Amendment No. 2).

1.2. Depending on the main alloying elements, steel is divided into groups: chromium, manganese, chromium-manganese, chromium-silicon, chromium-molybdenum and chromium-molybdenum-vanadium, chromium-vanadium, nickel-molybdenum, chromium-nickel and chromium-nickel with boron, chromium-silicon-manganese and chromium-silicon-manganese-nickel, chromium-manganese-nickel and chromium-manganese-nickel with titanium and boron, chromium-nickel-molybdenum, chromium-nickel-molybdenum-vanadium and chromium-nickel-vanadium , chrome-aluminum and chrome-aluminum with molybdenum, chrome-manganese-nickel with molybdenum and titanium.

(Changed edition, Amendment No. 4).

1.3. By type of processing, rolled products are divided into:

hot-rolled and forged (including with a turned or peeled surface);

calibrated;

with special surface finishing.

1.4. Depending on the quality of the surface, hot-rolled and forged steel is produced in groups: 1, 2, 3.

1.5. Depending on the condition of the material, rolled products are produced:

without heat treatment;

heat treated - TO;

cold-worked - N (for rolled products calibrated and with special surface finishing).

1.3 — 1.5 (Changed edition, Amendment No. 5)

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Circle 40X

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Circle 40X from stock. Large selection of structural and tool steel. We provide metalworking services! Delivery throughout the Russian Federation!

Circle 40X

Chemical composition: C, Si, Mn, Ni S, P, Cr, Cu, Fe.

Analogues: 45Х, 38ХА, 40ХН, 40ХС, 40ХФ, 40ХР.

Manufactured according to GOST 2590-88 using hot rolling technology. The state standard regulates the production process, as well as the requirements for the finished product. It is one of the most popular types of rolled metal products, round in cross section.

Characteristics of properties and applications

The 40X wheel is in high demand in the production process. Due to its unique performance properties, the scope of use of this type of rolled metal is almost unlimited. Can be used both in construction and industry. It is in demand in mechanical engineering and the production of industrial equipment.

Due to its operational properties, the 40X wheel can be successfully used in the manufacture of spare parts, tools, grinding balls, fasteners and other similar purposes.

Corrosion resistance and durability allow this type of rolled steel to be used for the manufacture of decorative elements. Suitable for the manufacture of gratings, fences, and decorative elements of room facades.

Advantages of cooperation with us

is a major supplier of certified rolled metal products on the domestic market. A flexible system of discounts has been developed and operates. We will help you make a choice and organize delivery throughout Russia. We sell rods made from different grades of steel, which will allow you to choose the best option based on operating conditions.

2a. ASSORTMENT

2a.1. The range of rolled products must comply with the requirements of GOST 2591, GOST 2590, GOST 2879, GOST 103, GOST 1133, GOST 7417, GOST 8559, GOST 8560, GOST 14955 and other regulatory and technical documentation.

Examples of symbols

Hot-rolled, square, with a square side of 46 mm, normal rolling accuracy B according to GOST 2591, made of steel grade 18ХГТ, surface quality group 2, heat-treated:

The same, round, 80 mm in diameter, normal rolling accuracy B according to GOST 2590, made of steel grade 18Х2Н4МА, surface quality group 1, mechanical properties option 2, heat-treated TO:

The same strip, 20 mm thick, 75 mm wide according to GOST 103, made of steel grade 25KhGT, surface quality group 3, mechanical properties option 1, without heat treatment:

Calibrated rolled products, round, 15 mm in diameter, with maximum deviations according to h11 in accordance with GOST 7417, made of steel grade 40ХН2МА, surface quality group B in accordance with GOST 1051, with control of mechanical properties M, cold-worked N:

Rolled products with special surface finishing, round, diameter 8.5 mm, with maximum deviations according to h9 and surface quality of group B according to GOST 14955, made of steel grade 12ХН3А, with normalized hardenability P, heat-treated TO:

(Changed edition, Amendment No. 5).

Application

Billets made of steel 30KhGSA are processed in accordance with cold stamping technology. This method makes it possible to produce earrings, rods, traverses, shafts, levers, sprockets, as well as cylinders and couplings. They are elements of low strength, so they are used in industrial units and lightly loaded mechanisms.

In general, the scope of application of such steel includes several areas.

• Construction. In this area, elements operated under variable loads have become widespread. Their resistance to oxidation is determined by the fact that these fasteners can only be used with special protection for the device.
• Aircraft manufacturing. In this industry, the alloy is in demand as a consumable for the production of flanges, shafts and other elements. However, it is prohibited to use 30KhGSA in the manufacture of critical parts.
• Mechanical engineering. The alloy has found its application in the manufacture and production of elements operating under conditions of variable or constant loads.

Mechanical properties depending on the section

Section, mms0.2, MPasB, MPad5, %y, %KCU, J/m2

Mechanical properties at elevated temperatures

t test, °Cs0.2, MPasB, MPad5, %y, %KCU, J/m2

Mechanical properties depending on tempering temperature

t of release, °Сs0.2, MPasB, MPad5, %y, %KCU, J/m2HB

Areas of use

Steel grade 30KhGSA is actively used in various industries. Most often it is used for the production of fastening elements, which are common in the construction of various buildings and structures. The features of this steel allow them to withstand variable loads. However, due to their low corrosion resistance, such fasteners are limited in places of use.

In aircraft manufacturing, this alloy is used in the production of flanges, shafts and other parts. It is not suitable for the manufacture of critical parts - only for consumables. The alloy has also gained great popularity in mechanical engineering. It is there that metal products have to experience regular variable loads.

Sources

• https://tpspribor.ru/vidy-metalla/harakteristiki-i-primenenie-stali-30hgsa.html
• https://stroy-podskazka.ru/stal/marki/30hgsa/
• https://msmetall.ru/metally/stal-30hgt-harakteristiki-2.html
• https://promgroupchel.ru/information/mark/legir/30khgsa/
• https://ScrapTraffic.com/splav/30xgsa/
• https://tokar.guru/metally/stal/harakteristiki-i-primenenie-stali-30hgsa.html
• https://areal-metal.ru/spravka/stal-30hgsa

Welding

The alloy belongs to the group of limited weldable ones. The following types of welding are used for it:

• ADS - argon-arc submerged arc with additional gas protection;
• ArDS - argon-arc welding with a tungsten electrode, carried out in a shielding gas environment;
• ESH - electroslag technology;
• KTS - resistance spot welding.

This requires preheating of the material and subsequent heat treatment. These restrictions do not exist exclusively when conducting CTS.