GOST Structural alloy steel products. Specifications. See the chemical composition and physical properties of GOST Grade 18_2_4__ annealed or high-tempered Metal, find alternative materials, and connect. See the chemical composition and physical properties of GOST Grade 40_2_2__ annealed or high-tempered, find alternative materials, and connect with.

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It is a low-alloy constructional steel of pearlite class.

30KHGSА / 30ХГСА Alloy structurall steel

The paper presents a theoretical and experimental research activity carried out in order to improve the properties of the 40H steel. The results permit the selection of the right heat-treatment parameters that offer the best combination between the yield strength, tensile strength, elongation, necking, impact strength at low temperature and hardness, in order to obtain a better behavior of the material for production tubing pipes in accordance with GOST Tubing pipes and couplings for them, for strength group M and L.

Shevchenko, Comparative estimation of technological capabilities of polymer quenchants, Science and education, 3 Novikov, Theory of heat treatment, Edition 4, Moscow: Gudremon, Special steel sin two volumes, Moscow: Pickering, Deformation and fracture of ferrite-perlite structures. Iron and steel institute, Moroz, The fine structure and strength of steel, Moscow: Shaposhnikov, Fundamentals of mechanical testing of metals, Moscow: Petrova, Diagrams of the state of metallic systems, Moscow: Gudtsov, Review of theoretical research and practical work on the definition of the elastic limit Journal of the Russian Metallurgical Society, 3 1 Properties of Austenite in Maraging Steel p.


Research Regarding Heat Treatment Influence on Solid State Phenomena Volume Microstructure and Mechanical Properties of 0. In this study, the microstructure and mechanical properties of 0.

Experimental results demonstrate that finely distributed primary carbides can be observed in 0. It was also found that the measured hardness of 0. Moreover, owing to lower concentration of C and Cr, the matensitic transformation temperature Ms can be godt to The following results are obtained: In recent years, high chromium cast irons have been widely applied in many fields because they have high hardness and abrasion resistance.

However, high godt cast irons are also expensive because much alloying elements, such as chromium, molybdenum and nickel, are added into them. In order to resolve above question, a new abrasion-resistant steel with high boron content was developed in this paper.

The new high boron steel, with 0. The microstructure and mechanical properties were researched. The results show that the solidification microstructure of as-cast high boron steel consists of boride FeB and matrix composed of pearlite, tost, and bainite.

And the borides distributes along grain boundary in the form of network.


The new high boron cast steel have a potential in stead of high chromium cast irons. The Alloy’s strength is increased by Precipitation Hardening which is the aging and solution of strength and is widely used in T6 state. Bearing in mind the effect of Boron in shorting the aging time, the pure material of B2O3 was used in order to add Boron to Alloy, so Alloying was done.

By testing mechanical properties and microstructure observations, good results were achieved in Boron effect on this alloy’s quench in comparison with those alloys lacking Boron. The outcomes depicted that this element addition increases hardness and tensile strength in aging process.

Gost 4543-71 30XM cold drawn seamless steel pipe

Such difference in hardness amount is due to better distribution of precipitates. The aging cycle was optimized using hardness by generating isothermal aging curve. The weld tensile properties, hardness test, microscopic analysis and fractographic studies were carried out in as-welded condition and at two different post-weld bost treatment conditions.

The results show a significant increase in both yield and tensile strength after post weld heat treatment.