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Steel S345

C375 steel C590K steel C590 steel C440D steel C440 steel C390K steel C390D steel C390 steel C375D steel C345K steel C345D steel C345 steel C285 steel C275 steel C255 steel C245 steel C235 steel

Designation

Name The value
Designation GOST Cyrillic С345
Designation GOST Latin C345
Transliteration S345
The chemical elements -

Description

S345 steel is used: for the manufacture of hot-rolled structural shapes (angles, I-beams, channels), sheet, universal broadband rental and roll-formed profiles designed for construction of steel structures with welded and other connections.

Standards

Name Code Standards
Classification, nomenclature and general norms В20 GOST 27772-88

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N As
GOST 27772-88 ≤0.15 ≤0.04 ≤0.035 1.3-1.7 ≤0.3 ≤0.8 ≤0.3 The rest ≤0.3 ≤0.008 ≤0.08
Fe is the basis.
According to GOST 27772-88 for steel smelted in electric furnaces, the content of N ≤ 0.012% is allowed. When smelting steel from the Kerch ore, the mass fraction of arsenic does not exceed 0.15%, while the mass fraction of phosphorus should not be more than 0.030%. For steel C345 it is possible to add aluminum and titanium from the calculation of the mass fraction of titanium at the rolling mill of 0.01-0.03%. At the request of the consumer in steel, the mass fraction of phosphorus should not be more than 0.030%, and sulfur - not more than 0.035%.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % kJ/m2, кДж/м2
Plates and wide universal rental in the state of delivery (KCU after ageing mechanical)
10-20 ≥325 ≥470 ≥21 ≥294
2-3.9 ≥345 ≥490 ≥15 ≥294
20-40 ≥305 ≥460 ≥21 ≥294
4-10 ≥345 ≥490 ≥21 ≥294
40-60 ≥285 ≥450 ≥21 ≥294
60-80 ≥275 ≥440 ≥21 ≥294
80-160 ≥265 ≥430 ≥21 ≥294
Structural steel in delivery condition (KCU after ageing mechanical)
10-20 ≥325 ≥470 ≥21 ≥294
20-40 ≥305 ≥460 ≥21 ≥294
4-10 ≥345 ≥490 ≥21 ≥294

Description mechanical marks

Name Description
Section Section
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength
d5 Elongation after rupture
kJ/m2 Toughness

Technological properties

Name The value
Weldability without restrictions

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