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.