Characteristics of St3sp-brand steel

St3sp is a standard-grade carbon steel used in load-bearing elements of welded and non-welded structures and components. Its chemical composition conforms to the DSTU 2651 and GOST 380 standards.

Classification: Standard-grade structural carbon steel.

Product: Steel sheets and long product.

 

Chemical composition of St3sp steel, %

С

Si

 Mn

P

S

Ni

Cr

N

Cu

0.14-0.22
0.15-0.3
0,4-0,65
<0.04
<0.05
<0.03

<0.3

<0.01

<0.3

 

Mechanical properties of St3sp steel

Standard Ultimate tensile strength, Rm (MPa) Standard Minimum yield strength, ReH (MPa)  Minimum elongation ratio σ, %
Up to 20 20-40 40-100 More than 100 Up to 20 20-40 More than 40

GOST 14637

DSTU 8803

 370-480 245 235 225 205 26 25 23

 

Analogues to St3sp steel

US

 A284Gr.D, A57036, A573Gr.58, A611Gr.C, GradeC, K01804, K02001, K02301, K02502, K02601, K02701, K02702, M1017

Japan

SS330, SS34, SS400

EU

Fe37-3FN, Fe37-3FU, Fe37B1FN, Fe37B1FU, Fe37B3FN, Fe37B3FU, S235, S235J0, S235J2G3, S235JR, S235JRG2

China

Q235, Q235A, Q235A-B, Q235A-Z, Q235B, Q235B-Z, Q235C

Sweden

1312, 1313

Finland

FORM300H, RACOLD03F, RACOLD215S

Austria

RSt360B

 

Application

St3sp steel is used in load-bearing elements of welded and non-welded structures and components that are used in positive temperatures. It is used to make thick- and thin-sheeted products, rolled and shaped profiles (channel sections, I-beams, angle bars, strips, scopes, mountings, etc.). It is also used for pipes for various uses and with different cross-sections, forgings, stampings and other metal components. It is used in civil and industrial construction, and in above-ground, overground and underground railways.

 

Welding

St3sp steel can be welded without preheating and subsequent heat treatment. However, for components with gauges over 3.6 cm, it is advisable to heat the material to 100°C and subsequently heat-treat it.

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