Steel S345K

Designation

Name	The value
Designation GOST Cyrillic	С345К
Designation GOST Latin	C345K
Transliteration	S345K
By chemical elements	-

Description

S345K 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 rules	В20	GOST 27772-88

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	As	Al
GOST 27772-88	≤0.12	≤0.04	0.07-0.12	0.3-0.6	0.5-0.8	0.17-0.37	0.3-0.6	Rest	0.3-0.5	≤0.008	≤0.08	0.08-0.15

Fe is the basis.
According to GOST 27772-88 for steel smelted in electric furnaces, the content of N ≤ 0.012% is allowed. Upon agreement of the manufacturer with the consumer, the mass fraction of nickel is allowed up to 0.30%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	KCU, kJ/m²
Plates and wide universal rental in the state of delivery (KCU-40 °C)
4-10	≥345	≥470	≥20	≥392
Structural steel in delivery condition (KCU-40 °C)
4-10	≥345	≥470	≥20	≥392

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
KCU	Toughness

Technological properties

Name	The value
Weldability	without restrictions