Characteristics of 40-brand steel
40 steel is used in long-life components that operate in temperatures up to 450°С. It conforms to the GOST 1050-88 standard.
Classification: High-grade structural carbon steel.
Product: Rolled products, including shaped.
Chemical composition of 40 steel, %
|
С |
Si |
Mn |
Ni |
P |
S |
Cr |
As |
Cu |
Fe |
|
0.37-0.45 |
0.17-0.37
|
0.5-0.8
|
<0.25 |
<0.035
|
<0.035
|
<0.025 |
<0.08 |
<0.3 |
~97 |
Mechanical properties of 40 steel
|
Grade |
Сondition of the goods |
Creep limit, Rm (MPa) |
Short-term tensile strength ReH (MPa) |
Minimum elongation ratio σ, % |
Contraction ratio, % |
|
GOST 1050 |
Normalisation |
335 |
570 |
19 |
45 |
|
DSTU 7809 |
Normalisation |
335 |
570 |
19 |
45 |
Analogues to 40 steel
|
US |
1040, 1042, G10400, G10420 |
|
Germany |
1.0511, 1.1186, C40, C40E, C40R, C42D, Ck35, Ck40, Cm40 |
|
Japan |
S40C, S43C, SWRCH38K, SWRCH40K |
|
France |
2C40, C40E, FR38, XC3841, XC38H1, XC42, XC42H1, XP42HI |
|
UK |
060A40, 080A40, 080M40, C40, C40E, CS40 |
|
EU |
1.1186, C35, C40, C40E |
|
Italy |
C40, C40E, C40R |
|
Belgium |
C40-2 |
|
Spain |
C40E |
|
China |
40, ML40 |
|
Sweden |
1555, 1650 |
|
Bulgaria |
40, C40E |
|
Hungary |
C40E |
|
Poland |
40, 40A, 40rs, D40, P40 |
|
Romania |
OLC40, OLC40X |
|
Czech Republic |
12041 |
|
Australia |
1040, M1040 |
|
South Korea |
SM40C |
Application
40 steel is widely used in piston rods, gear wheels, crankshafts, ring gears, flywheels, axles and bolts. It also features in medium-sized components like long axles, feed rods, cogs, etc, that are used in components for pipe fittings following preliminary quenching, which is conducted during the assembly of agricultural vehicles. 40 steel is used in fastenings for pipelines/boilers for thermal and nuclear power plants, and block/connecting components for turbines.
Welding
40 steel has limited welding capacity (to achieve a high-quality weld, the steel must be pre-heated before and annealed after the welding). The welding methods for this steel are manual-arc, automatic-arc and electroslag welding. Limitless contact welding can be applied.
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