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: Steel Sheets, long product.
Chemical composition of 20 steel, according DSTU 7809%
|
С |
Si |
Mn |
P |
S |
Cr |
Cu |
Ni |
|
0.17-0.24 |
0.17-0.37
|
0.35-0.65
|
≤0.035
|
≤0.040
|
≤0.25
|
≤0.30 |
≤0.30 |
Mechanical properties of 20 steel after normalization
|
Minimum yield strength, N/mm2, not less |
Ultimate tensile strength, N/mm2, not less |
Minimum elongation ratio, %, not less |
Contraction ratio, %, not less |
|
245 |
410 |
25 |
55 |
Analogues to steel 20
|
US |
1020, 1023, 1024, G10200, G10230, H10200, M1020, M1023 |
|
Japan |
S20C, S20CK, S22C, STB410, STKM12A, STKM12A-S, STKM13B, STKM13B-W |
|
EU |
1.1151, 2C22, C20E2C, C22, C22E |
|
China |
20, 20G, 20R, 20Z |
|
Sweden |
1450 |
|
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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