Heat resistance of stainless steel

Heat resistance of materials
Titanium in heat-resistant steel
Chrome in heat-resistant steel
Molybdenum in heat-resistant steel
Influence on the heat resistance of alloys
GOST 5582-75
GOST 7350-77

Alloying of heat-resistant steel

Chromium increases hardness and corrosion resistance. Nickel makes the alloy ductile; tungsten makes it hard and red-hot. Vanadium and niobium increase strength, impact and abrasion resistance. Molybdenum makes the alloy red-hot and resists oxidation at high temperatures. Manganese content above 1% increases hardness, impact strength and wear resistance. Titanium increases stability, corrosion resistance. Carbon content in the range of 0.04 to 0.08% provides higher strength at elevated temperatures.

Identification according to GOST 5632-72

High-alloy steel and corrosion-resistant, heat-resistant and heat-resistant alloys.

Application

Production of components for internal combustion engines and jet engines, steam boilers and turbines, gas turbines, metallurgical furnaces.

Grades of heat-resistant alloys

Valve steels are designed for producing valve assemblies. Individual valve elements operate under different loads, so for their manufacture steels with different characteristics and different types of heat treatment are used. In low-power motors, silchromes operating at temperatures of 800-900°C are used. For the valves of motors of considerable power they use high alloys of austenitic class - 45Х14Н14В2С3 or 45Х14Н14В2М.

C Si Mn Ni S P Cr Mo W
0.4 - 0.5 ≤ 0.8 ≤ 0.7 13 - 15 ≤ 0.02 ≤ 0.035 13 - 15 0.25 - 0.4 2 - 2.8

Boiler steel

It is a low-alloy heat-resistant alloy (Mo, Ni, V additives) with a low carbon content and high long-term strength.

Fixing steel

These are low alloyed (Mo, Ni, V) medium carbon alloys. The main quality is the high yield strength.

Turbine steel

These are gas turbine blades, turbine disks, combustion chambers. The austenitic steels used to make such products are divided into two groups.

    1. 1.Chromium content up to 25%, they are used in the production of combustion chambers, afterburner chambers, flame tubes.
    2. 2. Chromium content - no more than 15%, but they additionally include tungsten, titanium, molybdenum and niobium in higher amounts.

The supplier

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