Characteristics of 20-brand steel

 

20 steel is a high-grade unalloyed steel used in metal structures and components operating in temperatures of -40°С to +450°С. Hot-rolled and forged long products made from 20 steel conform to the DSTU 7809 and GOST 1050 standards.

Classification: High-grade structural carbon steel.

Products: Rolled products, including shaped.

 

Chemical composition of 20 steel, %

С

Si

 Mn

P

S

Cr

Cu

Ni

As

0.17-0.24

0.17-0.37
0.35-0.65
<0.04
<0.04
<0.25

<0.25

<0.25

<0.08

 

Mechanical properties of 20 steel

Standard

Delivery condition

Minimum yield strength, ReH (MPa)

Ultimate tensile strength, Rm (MPa)

Minimum elongation ratio σ, %

Contraction ratio, %

Heat treatment

GOST 1050

Post-normalisation

245

410

25

55

Post-normalisation

DSTU 7809

Post-normalisation

245

410

25

55

Post-normalisation

 

Analogues to 20

US  

1020, 1023, 1024, G10200, G10230, H10200, M1020, M1023

Germany  

1.0402, 1.0405, 1.1151, C22, C22E, C22R, Ck22, Cm22, Cq22, St35, St45-8

Japan

S20C, S20CK, S22C, STB410, STKM12A, STKM12A-S, STKM13B, STKM13B-W

France

1C22, 2C22, AF42, AF42C20, C20, C22, C22E, C25E, XC15, XC18, XC25

UK

050A20, 055M15, 070M20, 070M26, 1449-22CS, 1449-22HS, 1C22, 22HS, 430, C22, C22E

EU

1.1151, 2C22, C20E2C, C22, C22E

Italy

C18, C20, C21, C22, C22E, C22R, C25, C25E

Belgium

C25-1, C25-2

Spain

1C22, C22, C25k, F.112, F.1120

China

20, 20G, 20R, 20Z

Sweden

1450

Bulgaria

20, C22, C22E

Hungary

A45.47, C22E

Poland

20, K18

Romania

OLC20, OLC20X

Czech Republic

12022, 12024

Australia

1020, M1020

Switzerland

Ck22

South Korea

SM20C, SM20CK, SM22C

 

Application

20 steel is used in construction; machine-building; boiler and tank production; and heating elements of various specifications. High-grade unalloyed structural 20 steel in the form of flat and rolled products is used in preparing parts for weld-fabricated structures, pipelines, accumulators, bearing inserts, slings and other products. Thermo-chemical treatment (cementation, nitriding, nitrocarburising etc.) gives the axles, gears, worm screws, friction discs, shafts, spindles, bolts, cogs, pins and other steel components a strong surface hardness and durability, despite a low core strength.

 

Welding

Any type of welding is applicable, except for components that have been thermo-chemically treated. The standard welding methods are manual-arc, automatic-arc, automatic-arc submerged gas-protected and butt-resistance welding.

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