Characteristics of 45-brand steel

 

45 steel is among the most highly sought and popular types of structural carbon steel. It conforms to the GOST 1050-2013 and DSTU 7809 standards

Classification: High-grade structural carbon steel.

Product:Rolled products, including shaped.

 

Chemical composition of 45 steel, %

С

Si

 Mn

P

Ni

Cr

S

Cu

As

Fe

0.42-0.5

0.17-0.37
0.5-0.8
<0.035
<0.25 <0.25
<0.04
<0.25 <0.08
~97

 

Mechanical properties of 45 steel

Standard

Delivery condition

Creep limit, Rm (MPa)

Short-term tensile strength ReH (MPa)

Minimum elongation ratio σ, %

Contraction ratio, %

GOST 1050

Post-normalisation

355

600

16

40

DSTU 7809

Post-normalisation

355

600

16

40

 

Analogues to 45 steel

US  

1044, 1045, 1045H, G10420, G10430, G10440, G10450, M1044

Germany  

1.0503, 1.1191, 1.1193, C45, C45E, C45R, Cf45, Ck45, Cm45, Cq45

Japan

S45C, S48C, SWRCH45K, SWRCH48K

France

1C45, 2C45, AF65, C40E, C45, C45E, C45RR, CC45, XC42H1, XC42H1TS, XC45, XC45H1, XC48, XC48H1

UK

060A47, 080M, 080M46, 1449-50CS, 1449-50HS, 50HS, C45, C45E

EU

1.1191, 2C45, C45, C45E, C45EC, C46

Italy

1C45, C43, C45, C45E, C45R, C46

Belgium

C45-1, C45-2, C46

Spain

C45, C45E, C45k, C48k, F.114, F.1140, F.1142

China

45, 45H, ML45, SM45, ZG310-570, ZGD345-570

Sweden

1650, 1672

Bulgaria

45, C45, C45E

Hungary

A3, C45E

Poland

45

Romania

OLC45, OLC45q, OLC45X

Czech Republic

12050, 12056

Australia

1045, HK1042, K1042

Austria

C45SW

South Korea

SM45C, SM48C

 

Application

45 steel is used in hot- and cold-rolled flat and rolled products and forgings that then go on to be used in metal structures and machine-building components of various shapes and sizes. 45 structural steel has a wide range of uses in spindles, advancing cams, gear wheels, fastenings and various axle types. This steel is used for vital components (cantilever constructions, shafts, bars, beams, plungers, etc) which are heat-treated to increase their strength.

 

Welding

45 steel is difficult to weld. To achieve a high-quality welded seam, the product must be heated to +200-300°С before welding, then heat-treated (annealed) afterwards.

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