Characteristics of 40X-brand steel
40Х steel is a structural alloy steel intended for use in heavy-duty components. Products made from this steel conform to DSTU 7806 and GOST 4543 standards.
Classification: Structural alloy steel.
Product: Rolled products, including shaped.
Chemical composition of 40Х steel, according to GOST 4543,%
|
С |
Si |
Mn |
NI |
Cr |
Cu |
P |
S |
|
0.36-0.44 |
0.17-0.37 |
0.5-0.8 |
≤0.3 |
0.8-1.1 |
≤0.3 |
≤0.035 |
≤0.035 |
Mechanical properties of 40Х steel
|
Heat treatment |
Creep limit, (MPa) |
Temporary resistance, (MPa) |
Minimum elongation ratio, % |
Contraction ratio, % |
|
Case from 860°С in oil, tempering at 500°С |
≥785 |
≥980 |
≥10 |
≥45 |
Analogues to 40Х steel
|
US |
5135, 5140, 5140H, 5140RH, G51350, G51400, H51350, H51400 |
|
Japan |
SCr435, SCr435H, SCr440, SCr440H |
|
EU |
37Cr4, 37Cr4KD, 41Cr4, 41Cr4KD, 41CrS4 |
|
China |
35Cr, 38CrA, 40Cr, 40CrA, 40CrH, 45Cr, 45CrH, ML38CrA, ML40Cr |
|
Sweden |
2245 |
|
Poland |
38HA, 40H |
|
Romania |
40Cr10, 40Cr10q |
|
Czech Republic |
14140 |
|
Australia |
5132H, 5140 |
|
South Korea |
SCr435, SCr435H, SCr440, SCr440H |
Application
40X structural alloy steel is used in heavy-duty components (shafts, axles, gear shafts, plungers, bars, crank and cam shafts, rings, spindles, drift pins, battens, cogs, bolts, half-shafts, bushings, screws etc). 40X chromic steel is also used in forged, cold- and hot-stamped components, and the steel product is used in pipe, tank and other production.
Welding
40Х steel is difficult to weld, with the welded seam being one of the main reasons for flaws in the material. As such, 40X steel components are heated before welding, which helps to avoid many potential problems when using the finished item.
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