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, %

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, Rm (MPa)

Short-term tensile strength ReH (MPa)

Minimum elongation ratio σ, %

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

Germany

1.7034, 1.7035, 1.7045, 37Cr4, 41Cr4, 41CrS4, 42Cr4

Japan

SCr435, SCr435H, SCr440, SCr440H

France

37Cr4, 38C4, 38C4FF, 41Cr4, 42C4, 42C4TS

UK

37Cr4, 41Cr4, 530A36, 530A40, 530H36, 530H40, 530M40

EU

37Cr4, 37Cr4KD, 41Cr4, 41Cr4KD, 41CrS4

Italy

36CrMn4, 36CrMn5, 37Cr4, 38Cr4KB, 38CrMn4KB, 41Cr4, 41Cr4KB

Belgium

37Cr4, 41Cr4, 45C4

Spain

37Cr4, 38Cr4, 38Cr4DF, 41Cr4, 41Cr4DF, 42Cr4, F.1201, F.1202, F.1210, F.1211

China

35Cr, 38CrA, 40Cr, 40CrA, 40CrH, 45Cr, 45CrH, ML38CrA, ML40Cr

Sweden

2245

Bulgaria

37Cr4, 40Ch, 41Cr4

Hungary

37Cr4, 41Cr4, Cr2Z, Cr3Z

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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