Steel grades St. 4, 40. Composition, properties and purpose in industry

Characteristics of steel grade 4sp

St4sp - Structural carbon steel of ordinary quality, limited weldability, welding is carried out without heating and without subsequent heat treatment, welding methods: manual arc welding, automatic submerged arc welding and gas protection, KTS, ESW. According to NAKS Group: M01 (W01). For thicknesses greater than 35 millimeters, heating and subsequent heat treatment are recommended; it is not prone to flake sensitivity and there is no tendency to temper brittleness. Machinability by cutting in the hot-rolled state at HB 156 σB = 412 MPa Kυ hard alloy. = 1.7 and Kυ b.st. = 1.7, has found its application in the production of I-beams and T-beams, angle steel and channels; St4sp steel has relatively high toughness and ductility, slightly higher than St4ps steel. Forging at temperatures from 1280 to 800 0C, cooling is carried out in air. St4ps steel is not prone to temper brittleness and is magnetic.

Designations

Decoding steel grade 4sp

Decoding of steel: The letter at the beginning indicates a group of steel which defines the criteria for the ultimate strength for the chemical composition; if there is no letter, then such steel belongs to group A, and is supplied to consumers based on mechanical properties (such steel may have a high sulfur or phosphorus content). Letters St. indicate that the steel is of ordinary quality, although most steels are high quality. The numbers from 0 to 6 are the conventional brand number depending on the chemical composition and mechanical properties. Typically, the higher the number, the more carbon and the greater the strength. In our case, 4 indicates the carbon content in the alloy is 0.18–0.27%. The letters after the brand number indicate the degree of deoxidation: cn - calm. In terms of price, calm steels have become more expensive than semi-calm and boiling steels. Mild steel is steel obtained as a result of deoxidation. It is obtained by deoxidation with aluminum, manganese and silicon. The level of oxygen in it is so reduced that during metal processing no reaction occurs between carbon and oxygen, and the presence of non-metallic slags and their inclusion is reduced to a minimum. Calm steel has a dense structure and good mechanical properties. It is less prone to negative reactions to welding heat and to aging. The features of a homogeneous microstructure give the alloy maximum corrosion resistance and ductility.

Chemical composition

Fe is the basis. The nitrogen content is indicated for steel smelted in electric furnaces. In open hearth and converter steels the N content is ≤0.010%.

Supply St4sp

Supplied in the form of long products, including shaped steel according to GOST 2590-88 Hot-rolled round steel, GOST 2591-88 Hot-rolled square steel, GOST 8239-89 Hot-rolled steel I-beams, GOST 19771-93 Equal-flange bent steel angles, GOST 19772 -93 Bent steel angles, unequal flange, GOST 8278-83 Bent steel channels, equal flange, GOST 8281-80 Bent steel channels, unequal flange, GOST 8283-93 Bent steel trough equal flange profiles, GOST 380-94 Carbon steel of ordinary quality, GOST 8509-93 Steel corners hot-rolled equal flange, GOST 8510-86 Hot-rolled steel angles unequal flange, GOST 8240-97 Hot-rolled steel channels, GOST 535-88 Rolled bars and shaped carbon steel of ordinary quality, GOST 2879-88 Rolled hot-rolled hexagonal steel, GOST 19903-2015 Rolled sheets hot rolled , GOST 19904-90 Cold-rolled sheets, GOST 16523-97 Rolled thin sheets of high-quality and ordinary quality carbon steel for general purpose, GOST 503-81 Cold-rolled low-carbon steel strip, GOST 103-76 Hot-rolled steel strip, GOST 82-70 Hot-rolled steel broadband universal, GOST 3282-74 General purpose low-carbon steel wire, GOST 17305-71 Carbon structural steel wire, GOST 10705-80 Electric-welded steel pipes, GOST 10706-76 Straight-seam electric-welded steel pipes, GOST 3262-75 Steel water-gas pipes.

Steel St4ps

Content

• Substitute
• Purpose
• Type of delivery
• Chemical composition
• Critical point temperature
• Mechanical properties
• Technological properties Forging
• Weldability
• Machinability
• Rest

Substitute

A substitute for St4ps steel is St4sp steel.

Purpose

Purpose of steel St4ps: Welded, riveted and bolted structures of increased strength in the form of long, shaped and sheet products, as well as for lightly loaded parts such as shafts, axles, bushings, etc.

Type of delivery

St4ps steel is supplied as:

• Long and shaped steel according to GOST 535-2005
• Sheet according to GOST 14637-89, GOST 16523-97

Chemical composition

Table 1 - Mass fraction of steel elements St4ps, %, according to GOST 380-94

Critical point temperature

Table 2 - Temperature of critical points of steel St4ps, °C

Mechanical properties

Table 3 - Mechanical properties of St4ps steel at room temperature

Table 4 - Mechanical properties of St4ps steel at elevated temperatures

Table 5 — Fatigue limit of steel St4ps

Table 6 — Impact strength of steel St4ps (GOST 380-71 cancelled)

Technological properties

Forging

Table 7 — Forging of steel St4ps

Weldability

St4ps steel can be welded to a limited extent.

Welding methods for St4ps steel:

• manual arc welding
• manual argon arc welding
• automatic submerged arc welding
• mechanized welding with a consumable electrode in a carbon dioxide environment
• electroslag welding
• contact welding

Preheating and subsequent heat treatment are recommended.

Machinability

St4ps steel is processed by cutting in the hot-rolled state at HB 152. Kv = 1.7 (hard alloy) Kv = 1.7 (high-speed steel)

Rest

The tendency of St4ps steel to temper brittleness is not.

Flake sensitivity is not sensitive.

Literature

1. Brand of steels and alloys / A.S. Zubchenko, M.M. Koloskov, Yu.V. Kashirsky and others. Under the general editorship. A.S. Zubchenko - M.: Mechanical Engineering, 2003. 784 p.
2. Brand of steels and alloys / M.M. Koloskov, E.T. Dolbenko, Yu.V. Kashirsky and others. Under the general editorship. A.S. Zubchenko - M.: Mechanical Engineering, 2001. 672 p.
3. Brand of steels and alloys / V.G. Sorokin, A.V. Volosnikova, S.A. Vyatkin and others; Under general ed. V.G. Sorokina. - M.: Mechanical Engineering, 1989. - 640 p.
4. GOST 380-94 Carbon steel of ordinary quality. Stamps
5. GOST 535-88 Long-rolled and shaped rolled products made of carbon steel of ordinary quality. General technical conditions
6. GOST 14637-89 Rolled thick sheets of carbon steel of ordinary quality. Specifications
7. GOST 16523-97 Rolled thin-sheet carbon steel of high quality and ordinary quality for general purposes. Specifications

Mechanical properties of St4sp at normal temperature

Description of mechanical symbols

Mechanical properties St4sp

Mechanical characteristics

Foreign analogues of 4sp grade steel

Buy 4SP steel in Moscow and the Moscow region

4SP steel is widely used in various fields of industry, used in mechanical engineering, involved in the manufacturing industry, covers a wide range of construction, shipbuilding, and is partially used in aircraft production and many other areas of industry. There are a large number of steel grades, a huge part of the alloys are made to order, and those steel grades that are in great demand are partially stored for regular customers. The Metallpro company carries out wholesale and retail sales on the territory of the Russian Federation; 4SP steel is partly in our warehouse in the form of rolled metal products, and partly we ship directly from the metallurgical plant. With constant demand, we are ready to offer mutually beneficial cooperation, delivery directly from the factory by carriage standards, as well as by motor vehicles. You can buy 4SP steel in Moscow and the Moscow region at a favorable price from the Metallpro Trading Company under a mutually beneficial contract for a long partnership period.

Description

St4ps steel is used : for the production of angular rolled steel, I-beams, channels used in metal structures and construction; welded, riveted, bolted structures of increased strength; lightly loaded parts such as shafts, axles, bushings; electric welded pipes; double-headed, T-bar and P5 type rails intended for ground and overhead tracks; spikes of accuracy class C, designed for fastening railway rails to wooden sleepers and beams.

Note

Degree of deoxidation - ps.

Price for steel 4SP

The favorable price for the 4SP steel grade is explained by the presence of a competitive environment, low margins and loading from leading metallurgical plants directly, sometimes bypassing storage at transshipment points. Metalpro company bears full responsibility for the chemical composition of the supplied products and guarantees the quality of delivery. The cost of 4SP steel in warehouses in Moscow and the Moscow region is determined by the costs of warehousing and logistics. The Metallpro Company can also supply 4SP steel directly from the metallurgical plant, which gives our partners an advantage to consistently save money and develop their business in a broad format.

The price for 4SP grade steel is determined personally with each company, monthly needs are individually negotiated and the form of payment is discussed. Warehouse services for custom-made items and logistics to the production site also form the cost of 4SP steel. The Metalpro company maintains an open dialogue personally with each of its clients; each transaction is accompanied by a personal manager from the production stage to the delivery of rolled metal to the customer. Full control at any stage from payment to delivery to the customer’s site gives the latter a complete picture.

Material St4ps Chelyabinsk

Not a single production can operate without steel, be it heavy engineering or the manufacture of household electrical appliances. There are many brands of this product, as well as a large number of dispensing forms. Our company sells St4ps material in large quantities and with a minimal margin. To clarify the properties and characteristics of a particular brand, you can contact the company’s managers.

Like all products, St4ps material is purchased from leading manufacturers. Therefore, we are ready to provide a quality guarantee with full responsibility. The minimum number of intermediaries determines the low cost. Coupled with fast delivery, this enables our business partners to conduct stable and mutually beneficial cooperation.

In addition to tempering, in the form of one or another part (blank), our company carries out metal processing. All events undergo strict control for compliance with GOST and rules. The specialists of our company carry out such work as galvanizing, creating parts according to customer drawings, producing castings, manufacturing various profiles and much more.

Having the latest equipment and vast experience in our arsenal, we can offer product testing for a number of parameters, such as strength characteristics, chemical composition, alloy purity, and so on.

Each buyer is offered a huge range of products in various formats, as well as current services and works. To quickly understand and choose a product that meets your needs, you need to contact the company manager and receive detailed information on all issues of interest.